Paper Push: 2026-06-18
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每日论文推送：BGC-Argo、海色/海洋光学、海洋热浪与碳泵Daily Paper Push: BGC-Argo, ocean colour/ocean optics, marine heatwaves and carbon pump
本期由 GitHub Actions 自动检索生成：Nature/Science 系列优先，其次是用户指定重点期刊，再补充重点关注团队的新论文，最后纳入其他相关期刊；历史去重后保留 29 篇，不超过每日 50 篇上限。 This issue was generated automatically by GitHub Actions: Nature and Science series first, then the user-defined priority journals, then new papers from the focused team, followed by other relevant journals as topical supplements. After deduplication, 29 papers remain, below the daily limit of 50.
Download Word summary
无 mechanism sketch 图。今天的意大利语卡片： No mechanism sketch figure today. Daily Italian card:
每日一句意大利语Daily Italian
Tu proverai sì come sa di sale lo pane altrui.
Dante, Commedia, Paradiso XVII, 58-59; Italian original from Kalliope
这句说“你会尝到别人的面包有多咸”，常被解读为流亡和寄人篱下的辛酸。
The line says that one will learn how salty another person's bread tastes, a vivid image of exile and dependence.
趋势总结Trend Summary
本期重点关注 BGC-Argo、海色遥感/海洋光学、海洋热浪、浮游植物垂向结构和碳泵过程。筛选逻辑不再只限于重点期刊；当高影响力期刊当天新增较少时，会额外检索重点关注团队作者的新论文，并用海洋、海色/光学和碳循环关键词过滤，再从其他相关期刊补充候选论文。
This issue focuses on BGC-Argo, ocean-colour remote sensing, ocean optics, marine heatwaves, vertical phytoplankton structure and carbon-pump processes. The selection is no longer limited to priority journals; when few high-impact papers are newly available, the workflow also checks focused-team authors and filters those papers with ocean, ocean-colour/optics, and carbon-cycle keywords before adding other relevant journals as supplements.
重点期刊：按影响力和相关性排序Key journals: ordered by impact and relevance
1. Modeling Variability in Vertical Profiles of Particulate Organic Carbon Flux
作者Authors: Katherine Taylor; Raffaele Ferrari; B. B. Cael
发表月份Publication month: 2026-03 2026-03
Geophysical Research Letters · DOI: 10.1029/2026gl121728
关键词Tags: carbon pump; vertical structure carbon pump; vertical structure
摘要：颗粒有机碳（POC）从表面到深海的垂直通量调节海洋碳吸收，对地球的碳循环产生影响。文献中争论哪种函数形式最能描述这种通量随深度的衰减。通量测量中发现的广泛分散性阻碍了这个问题的进展。提出了一个理论模型，该模型将这种散射视为关键信息而不是噪声。基于 POC 通量数据遵循对数正态分布的证据，该模型将垂直 POC 通量剖面预测为三个参数的函数：POC 输出通量的对数平均值和对数标准差，以及与先前函数形式一致的深度缩放项。 该模型捕获了在各个 POC 通量分布中观察到的大变异性，并说明大 POC 通量事件对 POC 的垂直转移有很大贡献。
Abstract: The vertical flux of particulate organic carbon (POC) from the surface to the deep ocean regulates the ocean carbon uptake, with implications for the Earth's carbon cycle. It is debated in the literature what functional form best describes the attenuation of this flux with depth. The wide scatter found in measurements of the flux has impeded progress on this question. A theoretical model is proposed, which treats this scatter as key information rather than noise. Based on the evidence that the POC flux data follow a lognormal distribution, the model predicts the vertical POC flux profile as a function of three parameters: log‐mean and log‐standard deviation of the POC export flux, and a depth scaling term consistent with previous functional forms. The model captures the large variability observed in individual POC flux profiles and illustrates that large POC flux events contribute substantially to the vertical transfer of POC.
2. Distinct Vertical Structures of Global Eddy Heat and Salt Transports Revealed by Altimetry and Argo Observations
作者Authors: Xiangpeng Wang; Xiaoming Zhai; Helen L. Johnson; J. H. LaCasce; Qinbiao Ni; Yan Du
发表月份Publication month: 2026-05 2026-05
Geophysical Research Letters · DOI: 10.1029/2026gl122168
关键词Tags: vertical structure vertical structure
摘要：中尺度涡流在海洋热量和盐分的重新分配中发挥着关键作用，但其全球三维（3D）传输结构仍然知之甚少。在这里，我们根据卫星高度计和 Argo 观测估计了 1,800 m 高层的全球经向涡热和盐传输，揭示了独特的垂直结构。涡流热传输随深度而反转，在海洋上部为极地方向，但在下方为赤道方向，导致强烈的垂直抵消和对总经向热传输的净贡献较弱。相比之下，涡流盐输送表现出明显的纬度依赖性，在低纬度地区弱向赤道方向，但在中纬度地区强烈向极地方向，其贡献了近一半的经向盐输送总量。 这些对比行为主要源于背景温度和盐度梯度的差异，与梯度下降的涡通量一致。我们的结果为涡热和盐传输的全球 3D 结构提供了新颖的观测见解，为评估海洋和气候模型提供了基准。
Abstract: Mesoscale eddies play a key role in redistributing oceanic heat and salt, yet their global three‐dimensional (3D) transport structures remain poorly understood. Here, we estimate global meridional eddy heat and salt transports in the upper 1,800 m from satellite altimeter and Argo observations, revealing distinct vertical structures. Eddy heat transport reverses with depth, being poleward in the upper ocean but equatorward below, resulting in strong vertical cancellation and a weak net contribution to total meridional heat transport. In contrast, eddy salt transport exhibits pronounced latitude dependence, weakly equatorward at low latitudes but strongly poleward at mid‐latitudes, where it contributes nearly half of the total meridional salt transport. These contrasting behaviors primarily arise from differences in background temperature and salinity gradients, consistent with down‐gradient eddy fluxes. Our results provide novel observational insights into the global 3D structures of eddy heat and salt transports, offering a benchmark for evaluating ocean and climate models.
3. Pacific Decadal Oscillation Modulates an Interdecadal Trans‐Pacific Dry‐Wet Seesaw in East Asian and North American Semi‐Arid Regions
作者Authors: Shanshan Wang; Xinya Shu; Jianping Huang; Jinfei Sun; Fuxing Shi
发表月份Publication month: 2026-04 2026-04
Geophysical Research Letters · DOI: 10.1029/2025gl120943
关键词Tags: ocean biogeochemistry ocean biogeochemistry
摘要：半干旱地区正在通过不同的途径在全球范围内扩张：在东亚（EA）通过半湿润地区的干燥，而在北美（NA）通过干旱地区的湿润。这种横跨太平洋的年代际干湿逆转在机制上仍不清楚。在这里，我们证明了太平洋年代际振荡（PDO）驱动了这种气候跷跷板。对 1948-2022 年数据的分析表明，PDO 解释了 EA 中约 21% 的干湿方差和 NA 中约 63% 的干湿方差。我们确定了一个跨太平洋遥相关，其中 PDO 相变产生了关键的大气异常——夏季欧亚反气旋和冬季加深的阿留申低气压——随后改变了东亚季风和西风气流。这种大气重组改变了水分输送模式，最终在各大洲产生相反的水文气候趋势。 我们的工作建立了 PDO 相移与年代际干湿反转之间的因果关系，为预测自然气候变率下脆弱半干旱地区的长期水文气候风险提供了重要的机制理解。
Abstract: Semi‐arid regions are expanding globally through divergent pathways: in East Asia (EA) via drying of semi‐humid lands, while in North America (NA) through wetting of arid areas. This interdecadal dry‐wet reversal across the Pacific has remained mechanistically unclear. Here we demonstrate that the Pacific Decadal Oscillation (PDO) drives this climatic seesaw. Analysis of 1948–2022 data reveals the PDO explains approximately 21% of dry‐wet variance in EA and 63% in NA. We identify a trans‐Pacific teleconnection where PDO phase transitions generate key atmospheric anomalies—a summer Eurasian anticyclone and winter‐deepened Aleutian Low—that subsequently modify East Asian monsoons and westerly flows. This atmospheric reorganization alters moisture transport patterns, ultimately producing opposing hydroclimatic trends across the continents. Our work establishes a causal relationship between PDO phase shifts and interdecadal dry‐wet reversals, providing crucial mechanistic understanding for predicting long‐term hydroclimatic risks in vulnerable semi‐arid regions under natural climate variability.
4. Upper‐Ocean Variability of the Marine Carbonate System in the Northeast Pacific
作者Authors: Ana C. Franco; Debby Ianson; Raffaele Bernardello; Adam H. Monahan
发表月份Publication month: 2026-05 2026-05
Global Biogeochemical Cycles · DOI: 10.1029/2025gb008762
关键词Tags: ocean biogeochemistry ocean biogeochemistry
摘要：在东北太平洋，海洋碳酸盐系统在时间尺度上的变化没有得到很好的限制。在这里，我们量化了观察到的溶解无机碳 (DIC)、二氧化碳分压 () 和文石饱和状态的季节性和非季节性变化，并讨论了潜在的驱动因素。我们使用了四个 P 线时间序列站三十年的观测数据，这是东北太平洋最长的海洋碳酸盐系统时间序列（1990-2019 年）。为了衡量变异模式的空间范围，我们使用了代表观测周期的全球海洋模型的输出。在东北太平洋，10 m 处的季节性和非季节性变化很小，主要受到 DIC 和季节性和年际时间尺度温度变化的相反影响的抑制。 对于 DIC 和 ，季节周期主导了顶部 60-70 m 的总变率，平均横断面 10 m 季节幅度分别为 35 3 μmol 和 0. 31 0. 04。在上部 60-70 m，大多数变量的非季节变化幅度至少是季节变化幅度的一半。从检查的五个气候指数中，我们重点关注盆地规模的太平洋年代际振荡指数（PDO），以调查非季节性变化的潜在驱动因素，DIC 中 20%–40% 的非季节性变化与该指数相关。在东北太平洋，每增加一个 PDO 单位，正 PDO 周期与 10 m DIC 平均减少 5 μmol 和 10 m DIC 增加 0. 04 有关，这可能会减少海洋酸化事件的发生和严重程度。在负 PDO 期间，情况可能会相反。
Abstract: In the Northeast Pacific, the marine carbonate system's variability across timescales is not well constrained. Here, we quantify observed seasonal and non‐seasonal variability in Dissolved Inorganic Carbon (DIC), partial pressure of carbon dioxide () and aragonite saturation state and discuss potential drivers. We used three decades of observations from four Line P time series stations, the longest marine carbonate system time series in the Northeast Pacific (1990–2019). To gauge the spatial extent of the variability patterns, we used output from a global ocean model representing the observed period. In the Northeast Pacific, seasonal and non‐seasonal variability at 10 m was minimal, mostly damped by the opposing influence of DIC and temperature changes at both seasonal and interannual timescales. For DIC and , the seasonal cycle dominated total variability in the top 60–70 m, with mean‐transect 10 m seasonal amplitudes of 35 3 μmol and 0.31 0.04, respectively. In the upper 60–70 m, the magnitude of non‐seasonal variability was at least half that of the seasonal variability for most variables. From five climate indices examined, we focused on the basin‐scale Pacific Decadal Oscillation index (PDO) to investigate potential drivers of non‐seasonal variability, with 20%–40% of the non‐seasonal variability in DIC and associated to this index. In the Northeast Pacific, positive PDO periods were linked to a mean reduction in 10 m DIC of 5 μmol and an increase in 10 m of 0.04 for each PDO unit increase, which could potentially reduce the occurrence and severity of ocean acidification events. The opposite could be expected during negative PDO periods.
5. Optical complexity of North Sea, Baltic Sea, and adjacent coastal and inland waters derived from Sentinel-3 OLCI satellite data
作者Authors: Martin Hieronymi; Daniel Behr; Shun Bi; Rüdiger Röttgers
发表月份Publication month: 2026-02 2026-02
Earth System Science Data · DOI: 10.5194/essd-18-1307-2026
关键词Tags: ocean colour; ocean optics; bio-optics ocean colour; ocean optics; bio-optics
摘要：尽管遥感技术取得了进步，但由于方法分散，对淡水-海洋系统的水质进行一致监测仍然具有挑战性。在这里，我们概述了根据光学卫星数据估计的内陆水域、海岸和公海水质特征的示例数据集（https://doi.org/10.26050/WDCC/AquaINFRA_Sentinel3_v2，Hieronymi 等人，2025）。具体来说，这是整个北海和波罗的海地区 2023 年 6 月至 9 月期间的 Sentinel-3 OLCI（海洋和陆地颜色仪器）数据。该数据集包括每日汇总的观测数据，空间分辨率约为 300 m 的大气层顶部反射率，以及无云水域的遥感反射率、水的固有光学特性以及水成分浓度的估计，例如水的浓度。 g。 与水体碳含量有关。这些是新颖的 A4O 大气校正和 ONNS 水算法的结果。该数据集可作为理解处理链和相互依赖性的原型，也可用于开发高度连接性以回答各种科学问题；我们不对数据集中的 73 个单独参数进行实际验证。使用一个参数（水中的颗粒有机碳浓度）说明了涵盖所有水类型的验证的挑战。这项工作的目的是展示如何通过对哥白尼卫星数据应用光学水类型特定和基于神经网络的处理方案来克服从湖泊、河流到海洋的水体连续体水质监测的碎片化。 这项工作的重点是分析北海、波罗的海、沿海和内陆水域遥感反射率的光学复杂性。新的光学水类型分类的结果表明，A4O 提供的几乎所有 (99. 7 %) 遥感反射光谱都是可分类的，并且根据这些数据，该地区表现出天然水体的全方位光学多样性。该数据集可以作为水生环境整体视图的蓝图，也是迈向复杂系统基于观测的数字孪生组件的一步。
Abstract: Despite advances in remote sensing, consistent monitoring of water quality across freshwater-marine systems remains challenging due to methodological fragmentation. Here, we provide an overview of an exemplary dataset on water quality characteristics in inland waters, coasts, and the open sea estimated from optical satellite data (https://doi.org/10.26050/WDCC/AquaINFRA_Sentinel3_v2, Hieronymi et al., 2025). Specifically, this is Sentinel-3 OLCI (Ocean and Land Colour Instrument) data for the entire North Sea and Baltic Sea region for the period June to September 2023. The dataset includes daily aggregated observational data with a spatial resolution of approximately 300 m of reflectance at the top-of-atmosphere and for cloud-free water areas remote-sensing reflectance, inherent optical properties of the water, and an estimation of the concentrations of water constituents, e.g. related to the aquatic carbon content. These are the results of the novel A4O atmospheric correction and the ONNS water algorithm. The dataset serves as a prototype for understanding the processing chain and interdependencies, but also for developing a high degree of connectivity for answering various scientific questions; we do not perform an actual validation of the 73 individual parameters in the dataset. The challenges of a validation covering all water types are illustrated using one parameter, the particulate organic carbon concentration in water. The aim of this work is to show how fragmentation in water quality monitoring along the aquatic continuum from lakes, rivers to the sea can be overcome by applying an optical water type-specific and neural network-based processing scheme for Copernicus satellite data. Emphasis of this work is on analysing the optical complexity of remote-sensing reflectance in the North Sea, Baltic Sea, coastal, and inland waters. Results of a new optical water type classification show that almost all (99.7 %) remote-sensing reflectance spectra delivered by A4O are classifiable and that, based on this data, the region exhibits the full range of optical diversity of natural water bodies. The dataset can serve as a blueprint for a holistic view of the aquatic environment and is a step towards an observation-based digital twin component of the complex system.
6. Springtime Intensification of Mesoscale Eddies in the Southeastern Tropical Indian Ocean
作者Authors: Yifei Zhou; Xuhua Cheng; Xiangzhou Song; Wei Duan
发表月份Publication month: 2026-06 2026-06
Journal of Geophysical Research: Oceans · DOI: 10.1029/2025jc023723
关键词Tags: ocean biogeochemistry ocean biogeochemistry
摘要：热带印度洋东南部（SETIO）的中尺度涡旋调节区域环流和热量再分配。利用 1993 年至 2024 年的卫星测高和 GLORYS12V1 海洋再分析，我们发现 SETIO 中的涡动能 (EKE) 长期显着增加。该趋势表现出明显的季节性不对称，强化集中在南方春季（9月至11月），表明季节性EKE周期的放大。能量诊断表明，春季 EKE 增强主要是由斜压能量转换增强而不是正压过程驱动的。斜压不稳定性的增强与冬末和春季水平密度梯度的增强有关。 进一步的分析表明，爪哇南部沿海上升流的加强和上层海洋风能输入的增加可能有助于观测到的春季 EKE 增强。这些发现增进了我们对东部边界涡动力学的理解。
Abstract: Mesoscale eddies in the southeastern tropical Indian Ocean (SETIO) regulate regional circulation and heat redistribution. Using satellite altimetry and the GLORYS12V1 ocean reanalysis for 1993–2024, we identify a significant long‐term increase in eddy kinetic energy (EKE) in the SETIO. The trend exhibits pronounced seasonal asymmetry, with the intensification concentrated on austral spring (September–November), indicating an amplification of the seasonal EKE cycle. Energy diagnostics reveal that the springtime EKE intensification is primarily driven by enhanced baroclinic energy conversion rather than barotropic processes. The intensified baroclinic instability is associated with enhanced horizontal density gradients during late winter and spring. Further analyses suggest that strengthened coastal upwelling south of Java and increased wind energy input to the upper ocean likely contribute to the observed springtime EKE enhancement. These findings advance our understanding of eastern boundary eddy dynamics.
7. Potential of optical and ecological proxies to quantify phytoplankton carbon in oligotrophic waters
作者Authors: David Antoine; Chandanlal Parida; Camille Grimaldi
发表月份Publication month: 2026-04 2026-04
Biogeosciences · DOI: 10.5194/bg-23-2641-2026
关键词Tags: carbon pump; phytoplankton; ocean colour; ocean optics; backscattering carbon pump; phytoplankton; ocean colour; ocean optics; backscattering
摘要：卫星海洋颜色观测提供了两个代理来估计浮游植物碳浓度 Cphyto，然后用作量化生长率和初级生产力模型的输入，即浮游植物叶绿素 a 浓度 Chl a 和颗粒后向散射系数 bbp。浮游植物群落组成、生理状态、色素组合和非藻类物质的贡献的变化都在这些代理和 Cphyto 之间的关系中相互作用，因此它们之间不存在普遍存在的关系。因此，尚不清楚 Chl a 或 bbp 中哪一个最适合量化 Cphyto，或者它们是否都适合，但各自处于特定的营养条件下，特别是对于低生产率的寡营养水域。 在这里，我们使用来自东印度洋的数据集，其中包括浮游植物色素和细胞计数、颗粒有机碳 (POC) 和固有光学特性 (IOP)，对源自叶绿素 a 或 bbp 或细胞计数与异速生长关系相结合的 Cphyto 进行比较评估。当包括所有深度至 150 m 的样本时，我们发现三个 Cphyto 估计值与 IOP、Chl a 或 POC 之间存在显着相关性 (r2>∼0.5–0.6)。当仅包括顶部 25 m 时（适合海洋颜色遥感），除了细胞计数法衍生的 Cphyto 与 Chl 和 POC 之间之外，没有发现显着的关系。 bbp 测量范围太窄，无法最终评估在这种寡营养环境中从 bbp 衍生 Cphyto 的性能。 这些结果凸显了每种方法的局限性，并强调在将其应用于卫星海洋颜色观测之前需要仔细审查。
Abstract: Satellite ocean color observations provide two proxies to estimate the phytoplankton carbon concentration, Cphyto, then used as input to models quantifying growth rates and primary production, namely the phytoplankton chlorophyll a concentration, Chl a, and the particulate backscattering coefficient, bbp. Variability in phytoplankton community composition, physiological status, pigment assemblages and contribution of non-algal material all interplay in the relation between these proxies and Cphyto, so that no ubiquitous relationship exists between them. It is accordingly still unclear which of Chl a or bbp is best suited to quantify Cphyto or whether they both are, yet each in specific trophic conditions, especially for low-productivity oligotrophic waters. Here we use a dataset from the eastern Indian Ocean that includes phytoplankton pigments and cell counts, particulate organic carbon (POC) and inherent optical properties (IOPs) to perform a comparative assessment of Cphyto derived from either Chl a or bbp or cell counts combined with allometric relationships. We found significant correlations (r2>∼0.5–0.6) between the three Cphyto estimates and IOPs, Chl a or POC when samples from all depths down to 150 m are included. When only the top 25 m are included (amenable to ocean color remote sensing), no significant relationships were found, except between the cytometry-derived Cphyto and both Chl and POC. The range of bbp measurements was too narrow to conclusively assess the performance of deriving Cphyto from bbp in such an oligotrophic environment. These results highlight the limitations of each method and emphasize the need for careful review before applying them to satellite ocean color observations.
8. Eddy-induced chlorophyll variability in the Norwegian Sea revealed by Bio-Argo observations
作者Authors: Nikita Sandalyuk; Eduard Khachatrian
发表月份Publication month: 2026-04 2026-04
Frontiers in Marine Science · DOI: 10.3389/fmars.2026.1677822
关键词Tags: phytoplankton; vertical structure phytoplankton; vertical structure
摘要：中尺度涡流在塑造海洋生物地球化学过程中发挥着至关重要的作用，特别是影响海洋系统中叶绿素（Chl）的分布。了解涡流如何影响叶绿素分布对于评估区域生产力至关重要。本研究重点关注挪威海地区，该地区具有高强度的中尺度涡流活动和复杂的动力过程。为了研究涡流对感兴趣区域叶绿素分布的影响，我们采用了一种将测高数据与 Bio-Argo 剖面相结合的共定位方法，使我们能够推导出气旋 (CE) 和反气旋 (AE) 涡流的复合叶绿素结构。 我们的研究提供了对涡流引起的叶绿素分布的地下 2D 和 3D 模式的见解，表明 CE 和 AE 都可以提高挪威海的叶绿素浓度，而 AE 会在夏季推动更大的叶绿素升高。我们的分析表明，两种涡流类型都与地下叶绿素正异常相关，达到 0. 5–0. 7 mg/m³，最强信号局限于上部 50 m。虽然 CE 在 25 m 深度附近表现出峰值异常，但 AE 显示出更复杂的偶极子结构，最大值位于 20-50 m 深度层内的核心和外围。获得的结果还表明罗弗敦涡内叶绿素的浓度非常高。鉴于该地区中尺度涡流的普遍存在，这些发现表明它们在挪威海的生物地球化学动力学中发挥着至关重要的作用。
Abstract: Mesoscale eddies play a vital role in shaping marine biogeochemical processes, particularly influencing chlorophyll (Chl) distribution in oceanic systems. Understanding how eddies affect Chl distribution is critical for assessing regional productivity. The presented study focuses on the Norwegian Sea region, which is characterized by the high intensity of mesoscale eddy activity and complex dynamical processes. To study the eddy impact on the Chl distribution in the region of interest, we employed a colocalization method that combines altimetry data with Bio-Argo profiles, allowing us to derive composite Chl structures for both cyclonic (CEs) and anticyclonic (AEs) eddies. Our study provides insights into the subsurface 2D and 3D patterns of eddy-induced Chl distribution, showing that both CEs and AEs can enhance Chl concentration in the Norwegian Sea, with AEs driving greater Chl elevation during the summer months. Our analysis reveals that both eddy types are associated with positive subsurface Chl anomalies, reaching up to 0.5–0.7 mg/m³, with the strongest signals confined to the upper 50 m. While CEs exhibit peak anomalies near 25 m depth, AEs show a more complex dipole-like structure with maxima located both in the core and at the periphery within a depth layer of ∼20–50 m. The obtained results also demonstrated remarkably high concentration of Chl within the Lofoten Vortex. Given the prevalence of mesoscale eddies in the region, these findings suggest their crucial role in the biogeochemical dynamics of the Norwegian Sea.
9. Biophysical Dynamics of Mesoscale Eddies: Coincident Observations from SWOT and PACE
作者Authors: Lilian Dove; Mara Freilich
发表月份Publication month: 2026（月份未核准） 2026 (month not verified)
Oceanography · DOI: 10.5670/oceanog.2026.e111
关键词Tags: microbial carbon microbial carbon
摘要：美国宇航局地表水和海洋地形（SWOT）卫星和美国宇航局浮游生物、气溶胶、云、海洋生态系统（PACE）卫星的重叠任务提供了从太空以前所未有的时空尺度观察海洋生物物理相互作用的机会。我们使用这两个前沿任务的临时数据集来研究亚热带中尺度涡旋微生物群落组成的次季节到季节变化。研究结果强调了中尺度涡旋作为短暂生态位重建海洋表面微生物群落的能力。 SWOT 和 PACE 的结合首次实现了对浮游生物群落组成以及构成浮游生物群落的物理过程的空间观测。
Abstract: The overlapping missions of the NASA Surface Water and Ocean Topography (SWOT) satellite and NASA Plankton, Aerosol, Cloud, ocean Ecosystem (PACE) satellite provide the opportunity to observe oceanic biophysical interactions from space at unprecedented spatiotemporal scales. We use provisional datasets from these two cutting-edge missions to investigate subseasonal to seasonal variability in the microbial community compositions of subtropical mesoscale eddies. The results highlight the capacity of mesoscale eddies to act as transient ecological niches that restructure the surface marine microbial community. For the first time, the combination of SWOT and PACE enables space-based observations of plankton community composition alongside the physical processes that structure it.
10. Species‐Specific Temporal Shifts in Distribution Patterns of Japanese Sardine and Japanese Anchovy in the Western North Pacific in Relation to the Pacific Decadal Oscillation
作者Authors: Kazunari Higashiguchi; Shota Nishijima; Yasuhiro Kamimura; Sho Furuichi; Ryuji Yukami
发表月份Publication month: 2026-05 2026-05
Oceanography · DOI: 10.1111/fog.70050
关键词Tags: ocean biogeochemistry ocean biogeochemistry
摘要：人们普遍认为日本沙丁鱼和日本鳀鱼的生物量会随着太平洋年代际振荡（PDO）等与气候相关的海洋变化而周期性波动。然而，人们对它们的空间生态如何随周期性海洋变化而变化却知之甚少。特别是，这两个物种的空间分布和对水温变化的响应，以及 PDO 和丰度的变化尚不清楚。为了揭示与生物量波动和PDO相关的时空动态，我们利用时空模型估算了2005年至2020年秋季北太平洋西部这两个物种的密度、空间分布和热生态位。结果表明，研究期间沙丁鱼丰度有所增加，但分布格局相对稳定。 此外，他们估计的热生态位（使用时空模型与其分布相关的估计温度）在 PDO 阶段没有变化。相比之下，在研究期间，日本鳀鱼的分布模式从日本列岛近海地区到沿海地区表现出显着的变化，并且其热生态位也发生了变化。本研究表明，热生态位的时间变化是解释环境变化下分布变化的物种特异性差异的关键。这一见解将有助于提高分布变化的预测准确性，并加强对气候变化对鱼类种群动态影响的评估。
Abstract: The biomass of Japanese sardine and Japanese anchovy is generally considered to cyclically fluctuate in response to climate‐related oceanic changes such as Pacific decadal oscillation (PDO). However, little is known about how their spatial ecology changes in relation to the periodic oceanic changes. In particular, the spatial distributions and responses to changes in water temperature of both species, along with shifts in PDO and abundance, are unclear. To reveal the spatiotemporal dynamics in relation to biomass fluctuation and PDO, we estimated the densities, the spatial distributions and thermal niche of both species in the western North Pacific during autumn from 2005 to 2020, using spatiotemporal models. The results indicated that the sardine abundance increased, whereas their distribution pattern was relatively stable during the study period. In addition, their estimated thermal niche (the estimated temperatures associated with their distributions using spatiotemporal models) did not change across PDO phases. In contrast, Japanese anchovy exhibited a notable shift in its distribution pattern from offshore to coastal regions of the Japanese archipelago and a change in their thermal niche over the study period. The present study suggests that temporal variability in the thermal niche is key to explaining species‐specific differences in distribution shifts under environmental change. This insight will help improve the projection accuracy of distribution shifts and enhance assessments of climate change impacts on population dynamics of fish species.
11. Satellite-Observed Acceleration in the Occurrence of Compound Marine Heatwave and Phytoplankton Bloom Events in the Global Coastal Ocean
作者Authors: Jiajun Ma; Chunzai Wang
发表月份Publication month: 2026-04 2026-04
Remote Sensing · DOI: 10.3390/rs18091322
关键词Tags: phytoplankton; marine heatwaves phytoplankton; marine heatwaves
摘要：在气候变化的影响下，海洋热浪（MHW）和浮游植物大量繁殖的发生正在加速，但它们同时发生的频率和驱动因素仍然知之甚少。利用 2003 年至 2020 年沿海优化卫星观测结果，我们绘制了沿海大型海洋生态系统的全球复合 MHW-浮游植物水华 (MHW-PB) 事件，并量化了其时空趋势和环境预测因子。复合事件以 4. 8% yr−1 的速度增加，主要是由于 MHW 频率增加 6. 5% yr−1 所致；时间洗牌测试证实这种趋势低于随机共现预期，表明生物抑制积极限制复合事件的增长。 复合独立因子（CIF）揭示了纬度异质性：低纬度上升流系统表现出MHW-PB互斥性，而高纬度和富营养化沿海地区则表现出正向共现趋势。可解释的机器学习进一步表明，在低纬度地区，养分可用性主导着水华反应，而光在高纬度地区占主导地位，MHW 强度与水华概率呈现出营养依赖性的非线性关联。矛盾的是，在热带 MHW 快速加速的驱动下，低纬度地区 (6. 1% yr−1) 的复合频率加速速度几乎是高纬度地区 (3. 5% yr−1) 的两倍。这些不同的状况预示着双重生态风险：上升流系统的营养不匹配以及富营养化沿海水域缺氧和有害藻华危害的升级。
Abstract: The occurrence of marine heatwaves (MHWs) and phytoplankton blooms is accelerating under climate change, yet the frequency and drivers of their compound co-occurrence remain poorly understood. Using coastal-optimized satellite observations from 2003–2020, we mapped global compound MHW–phytoplankton bloom (MHW-PB) events across coastal large marine ecosystems and quantified their spatiotemporal trends and environmental predictors. Compound events are increasing at 4.8% yr−1, driven primarily by a 6.5% yr−1 rise in MHW frequency; a temporal shuffle test confirms this trend falls below random co-occurrence expectation, indicating biological suppression actively constrains compound event growth. The compound independence factor (CIF) reveals latitudinal heterogeneity: low-latitude upwelling systems show MHW–PB mutual exclusivity, while high-latitude and eutrophic coastal regions show positive co-occurrence tendency. Interpretable machine learning further shows that nutrient availability dominates bloom responses at low latitudes whereas light dominates at high latitudes, with MHW intensity exhibiting nutrient-dependent non-linear associations with bloom probability. Paradoxically, compound frequency accelerates nearly twice as fast in low latitudes (6.1% yr−1) as in high latitudes (3.5% yr−1), driven by rapid tropical MHW acceleration. These diverging regimes signal dual ecological risks: trophic mismatches in upwelling systems and escalating hypoxia and harmful algal bloom hazards in eutrophic coastal waters.
12. Satellite observations of Indian Ocean Dipole driven winter chlorophyll enhancement and phytoplankton size structure in the southeastern Bay of Bengal
作者Authors: Joel John; V. B. Adith; V. P. Akhil; M. G. Keerthi; Jessin Joy Alex; Siby Kurian
发表月份Publication month: 2026-06 2026-06
Remote Sensing · DOI: 10.1080/2150704x.2026.2662544
关键词Tags: phytoplankton phytoplankton
摘要：Crossref 未提供该 DOI 的摘要。
Abstract: Crossref did not provide an abstract for this DOI.
13. Variability of pCO2 Fields in the Global Surface Ocean Using Ocean Color Data: Utilization of EOS-06 OCM Chlorophyll
作者Authors: Sachiko Mohanty; Ibrahim Shaik; Mohammed Suhail; Devi Vara Prasad; P. V. Nagamani; Debashis Mitra
发表月份Publication month: 2026-06 2026-06
Remote Sensing · DOI: 10.1007/s12524-026-02477-z
关键词Tags: phytoplankton; ocean colour phytoplankton; ocean colour
摘要：Crossref 未提供该 DOI 的摘要。
Abstract: Crossref did not provide an abstract for this DOI.
14. Evaluation of suspended particulate matter retrieval models for subtropical estuarine waters monitoring
作者Authors: Rafaela Cristine Zem; Claudio Clemente Faria Barbosa; Daniel Andrade Maciel; Rejane S. Paulino; Mauricio Almeida Noernberg
发表月份Publication month: 2026-06 2026-06
Remote Sensing · DOI: 10.1080/01431161.2026.2677906
关键词Tags: ocean biogeochemistry ocean biogeochemistry
摘要：Crossref 未提供该 DOI 的摘要。
Abstract: Crossref did not provide an abstract for this DOI.
重点关注团队Focused team
15. Spatiotemporal Variations of Phytoplankton Groups and Their Relationships with Mesoscale Eddies in the Northwest Pacific
作者Authors: Jian Wen; Pengchao Jin; Lichuan Zhang; Xinjun Chen; Yang Zhang; Wei Yu
发表月份Publication month: 2026-04 2026-04
Journal of Marine Science and Engineering · DOI: 10.3390/jmse14090789
关键词Tags: BGC-Argo; phytoplankton BGC-Argo; phytoplankton
摘要：西北太平洋公海渔场复杂的海洋动态塑造了浮游植物群落，这是商业性中上层物种的基础。本研究通过分析 2014 年至 2023 年八种浮游植物功能类型 (PFT) 的时空演化，研究中尺度涡流如何调节浮游植物群的结构。利用高分辨率人工智能驱动模型数据 (AIGD-PFT) 和归一化径向距离网格 (0–2 R)，我们量化了气旋 (CE) 和反气旋 (AE) 涡旋内的 PFT 浓度，通过生物地球化学 Argo (BGC-Argo) 和原位测量进行验证。结果表明，该区浮游植物以硅藻和甲藻为主，分别占浮游植物的88. 7%，春季和秋季季节高峰明显。 CE 显着提高硅藻和甲藻浓度，特别是在 0. 4 R-1。 2 R动态环，而AE则有利于中低纬度原绿球藻等超微型浮游植物的聚集。相关分析表明，硅藻丰度与溶解氧密切相关，与海面高度呈负相关。我们得出的结论是，中尺度涡流通过改变当地的物理和营养条件来驱动浮游植物群落的空间重塑。这些发现为评估北太平洋不同营养级渔业的生境分布和可持续管理提供了重要的生态背景。
Abstract: The complex ocean dynamics in the Northwest Pacific high-seas fishing grounds shape phytoplankton communities, which serve as the foundation for commercially pelagic species. This study investigates how mesoscale eddies modulate phytoplankton groups’ structures by analyzing the spatiotemporal evolution of eight phytoplankton functional types (PFTs) from 2014 to 2023. Utilizing high-resolution AI-driven model data (AIGD-PFT) and a normalized radial distance grid (0–2 R), we quantified PFTs concentrations within cyclonic (CE) and anticyclonic (AE) eddies, validated by Biogeochemical Argo (BGC-Argo) and in situ measurements. Results reveal that diatoms and dinoflagellates dominate the region, accounting for 88.7% of phytoplankton with distinct seasonal peaks in spring and autumn, respectively. CE significantly enhance diatom and dinoflagellate concentration, particularly within the 0.4 R–1.2 R dynamic ring, while AE favor the aggregation of picophytoplankton, such as Prochlorococcus, in mid-to-low latitudes. Correlation analysis indicates that diatom abundance is strongly linked to dissolved oxygen and negatively correlated with sea surface height. We conclude that mesoscale eddies drive the spatial remodeling of phytoplankton communities by altering local physical and nutrient conditions. These findings provide a critical ecological context for assessing the habitat distribution and sustainable management of North Pacific fisheries across different trophic levels.
16. Capabilities of PACE Ocean color Instrument (OCI) for phytoplankton pigments of inland lakes
作者Authors: Jiahan Xu; Kun Xue; Ryan E. O’Shea; Chong Fang; Ming Shen; Zhigang Cao; Hongtao Duan
发表月份Publication month: 2026-05 2026-05
International Journal of Applied Earth Observation and Geoinformation · DOI: 10.1016/j.jag.2026.105265
关键词Tags: phytoplankton; ocean colour phytoplankton; ocean colour
摘要：Crossref 未提供该 DOI 的摘要。
Abstract: Crossref did not provide an abstract for this DOI.
17. AI in Satellite Remote Sensing of the Ocean
作者Authors: Xiaofeng Li; Qing Xu; Haoyu Wang; Haoyu Jiang; Xiaobin Yin; Shanshan Mu; Xiaolong Li; Hua Su; et al.
发表月份Publication month: 2026（月份未核准） 2026 (month not verified)
Proceedings of the IEEE · DOI: 10.1109/jproc.2026.3664121
关键词Tags: ocean colour ocean colour
摘要：Crossref 未提供该 DOI 的摘要。
Abstract: Crossref did not provide an abstract for this DOI.
18. Potential contribution of stratosphere–troposphere coupling to Pacific decadal oscillation teleconnection to Antarctic summer sea ice melt
作者Authors: Cen Wang; Hui Su; Jianqiu Zheng; Chengyun Yang; Yanjia Wang; Shiwei Yu; Huisi Mo; Enze Zhang; et al.
发表月份Publication month: 2026-06 2026-06
npj Climate and Atmospheric Science · DOI: 10.1038/s41612-026-01460-2
关键词Tags: ocean biogeochemistry ocean biogeochemistry
摘要：Crossref 未提供该 DOI 的摘要。
Abstract: Crossref did not provide an abstract for this DOI.
19. An Effective Deep Learning Model for the Pacific Decadal Oscillation Prediction
作者Authors: Wenbo Liu; Jianqi Sun; Kai Wang; Huijun Wang
发表月份Publication month: 2026-06 2026-06
Environmental Research Communications · DOI: 10.1088/2515-7620/ae7b04
关键词Tags: ocean biogeochemistry ocean biogeochemistry
摘要：太平洋年代际振荡（PDO）是气候变化的重要年代际模式，对气候、水文气候和海洋生态系统产生深远的全球影响。因此，巧妙地预测PDO具有重要的科学和社会意义。然而，当前的统计和动态方法在预测 PDO 方面面临着挑战，特别是在两年交付周期之后。为了应对这一挑战，我们开发了一个专为 PDO 预测定制的深度学习 (DL) 模型。 DL 模型表现出巧妙的预测，在 1-8 年的交付周期和 ~0 的交付周期内实现平均相关系数 > 0. 64。 41 领先 7-8 年。此外，我们开发的基于深度学习的物理诊断方法表明，这种性能的提高主要源于深度学习模型识别有效预测因素并捕获其协同相互作用的能力。 总的来说，这些发现为十年间气候预测提供了一种变革性方法，超越了 PDO 扩展到其他十年模式和气候模式。
Abstract: The Pacific Decadal Oscillation (PDO) is an essential decadal mode in climate variability, exerting profound global impacts on climates, hydroclimates, and marine ecosystems. Consequently, skillful prediction of the PDO is of considerable scientific and societal significance. However, current statistical and dynamical approaches face a challenge in predicting the PDO, particularly beyond two-year lead times. To address this challenge, we develop a deep learning (DL) model tailored for the PDO prediction. The DL model exhibits a skillful prediction, achieving a mean correlation coefficient > 0.64 at lead times of 1–8 years and ~0.41 at 7–8-year leads. Moreover, our developed DL-based physical diagnosis method demonstrates that this improved performance stems primarily from the DL model’s capability to identify effective predictors and capture their synergistic interactions. Collectively, these findings provide a transformative approach for decadal climate prediction, extending beyond the PDO to other decadal modes and climatic patterns.
20. Optical properties and composition of size-fractionated suspended particulate matter samples from the surface waters of the southern Baltic Sea
作者Authors: Sławomir B. Woźniak; Justyna Meler; Joanna Stoń-Egiert
发表月份Publication month: 2026-05 2026-05
Journal of Marine Systems · DOI: 10.1016/j.jmarsys.2026.104233
关键词Tags: bio-optics bio-optics
摘要：Crossref 未提供该 DOI 的摘要。
Abstract: Crossref did not provide an abstract for this DOI.
21. Influence of Arctic Oscillation and Pacific Decadal Oscillation on sea ice export through the Fram Strait
作者Authors: Chaodong Chen; Hailun He; Zheng Ling
发表月份Publication month: 2026-03 2026-03
Journal of Physics: Conference Series · DOI: 10.1088/1742-6596/3178/1/012067
关键词Tags: ocean biogeochemistry ocean biogeochemistry
摘要：本研究探讨了北极涛动（AO）和太平洋年代际涛动（PDO）如何影响通过弗拉姆海峡的海冰面积和出口量。连续小波功率谱揭示了海冰面积和出口量的显着年度周期。交叉小波变换的结果表明，海冰面积和体积输出在大约一年的周期内与AO同步，并且PDO指数在2002-2009年的十年周期内领先海冰面积输出。这些结果展示了 AO/PDO 对通过弗拉姆海峡海冰输出的关系。
Abstract: This study examines how the Arctic Oscillation (AO) and Pacific Decadal Oscillation (PDO) influence sea ice area and volume export through the Fram Strait. The continuous wavelet power spectrum reveals a significant annual cycle in sea ice area and volume export. The results from the cross wavelet transform indicate that sea ice area and volume export were in-phase with the AO on a roughly one-year period, and the PDO index leading sea ice area export from 2002-2009 on a decadal period. These results exhibit the relationship of AO/PDO on sea ice export through the Fram Strait.
22. Impacts of Mesoscale Eddies on the Abundance and Distribution of Chub Mackerel (Scomber japonicus) in the Northwest Pacific Ocean
作者Authors: Shujie Wang; Qinwang Xing; Pengchao Jin; Heng Zhang; Wei Yu
发表月份Publication month: 2026-06 2026-06
Journal of Ocean University of China · DOI: 10.1007/s11802-026-6425-2
关键词Tags: ocean biogeochemistry ocean biogeochemistry
摘要：Crossref 未提供该 DOI 的摘要。
Abstract: Crossref did not provide an abstract for this DOI.
23. Influence of Mesoscale Eddies on the Three-Dimensional Distribution of Microplastics in the Western North Pacific
作者Authors: Jinfeng Ding; Dejun Dai; Haibing Ding; Fenglei Gao; Chang Zhao; Fenghua Jiang; Wei Cao; Jingxi Li; et al.
发表月份Publication month: 2026-03 2026-03
Environmental Science & Technology · DOI: 10.1021/acs.est.5c18906
关键词Tags: ocean biogeochemistry ocean biogeochemistry
摘要：Crossref 未提供该 DOI 的摘要。
Abstract: Crossref did not provide an abstract for this DOI.
其他相关期刊：按主题相关性补充Other relevant journals: topical supplements
24. Global estimation of surface ocean particulate organic carbon using in-situ and satellite observations
作者Authors: Ibrahim Shaik; Roshan Jacob Tom; P.V. Nagamani; Kande Vamsi Krishna
发表月份Publication month: 2026-04 2026-04
Ecological Frontiers · DOI: 10.1016/j.ecofro.2026.04.006
关键词Tags: ocean biogeochemistry ocean biogeochemistry
摘要：Crossref 未提供该 DOI 的摘要。
Abstract: Crossref did not provide an abstract for this DOI.
25. Suspended particulate matter in Voh lagoon (New Caledonia): Impact of ultramafic rock mining on primary production
作者Authors: Sandrine Chifflet; Jean-Louis Gonzalez; David Varillon; Anne Desnues; Bernard Angeletti; Adrien Duvivier; Doriane Delanghe; Cristèle Chevalier
发表月份Publication month: 2026-04 2026-04
Regional Studies in Marine Science · DOI: 10.1016/j.rsma.2026.104888
关键词Tags: ocean biogeochemistry ocean biogeochemistry
摘要：Crossref 未提供该 DOI 的摘要。
Abstract: Crossref did not provide an abstract for this DOI.
26. Cyanotoxin exposure as a novel risk factor for liver fibrosis and steatosis
作者Authors: Brenda Y. Hernandez; Xuemei Zhu; Ella Macatugal; Michelle Nagata; Keiko Garvin; Yvette C. Paulino; Lynne R. Wilkens; Linda L. Wong; et al.
发表月份Publication month: 2026-03 2026-03
International Journal of Cancer · DOI: 10.1002/ijc.70446
关键词Tags: ocean biogeochemistry ocean biogeochemistry
摘要：蓝藻是普遍存在的环境细菌，能够产生蓝藻毒素，包括有效的肝脏肿瘤促进剂。对蓝藻毒素暴露及其在肝癌发病机制中的潜在作用的了解有限。一项横断面研究评估了蓝藻毒素暴露与进行性肝病的两个标志（肝纤维化和脂肪变性）的关系，该研究对夏威夷州和美国领土关岛的 399 名无癌症病史的成年居民进行了评估。使用直接竞争性酶联免疫吸附测定法分析唾液、血清和尿液中的微囊藻毒素 (MC)、结节藻毒素 (NOD)、圆柱精藻蛋白酶 (CYN) 和鱼腥肽 (AB)。通过瞬时弹性成像测量肝纤维化和脂肪变性。 在多元广义线性和加性模型中评估了蓝藻毒素水平与纤维化和脂肪变性程度的线性和非线性关联。在所有个体中均检测到一种或多种蓝藻毒素。 18% 存在中度至重度纤维化或肝硬化，53% 存在中度至重度脂肪变性。观察到唾液蓝藻毒素与纤维化水平呈正相关：MC/NOD（线性：β = 9. 07，95% 置信区间 [CI] 1. 32–16. 82，p = . 022；非线性 p = . 0011）； CYN（线性：β = 24. 21，95% CI 14. 12–34. 30，p p = . 0001）； AB（非线性 p = . 0125）。观察到血清 MC/NOD 与脂肪变性水平呈正相关（非线性 p = . 0120）。蓝藻毒素与纤维化的非线性关联特定于规定的浓度。 我们的新发现表明蓝藻毒素是肝病的独立危险因素，这与我们之前将口腔蓝藻与肝细胞癌联系起来的研究是一致的，并且可能对肝癌的预防具有全球意义。
Abstract: Cyanobacteria are ubiquitous environmental bacteria capable of producing cyanotoxins, including potent liver tumor promoters. There is limited knowledge of exposure to cyanotoxins and their potential role in the pathogenesis of liver cancer The relationship of cyanotoxin exposure with two hallmarks of progressive liver disease—liver fibrosis and steatosis—was evaluated in a cross‐sectional study of 399 adult residents of the state of Hawaii and the US territory of Guam without a history of cancer. Microcystins (MC), nodularins (NOD), cylindrospermopsin (CYN), and anabaenopeptins (AB) were analyzed in saliva, serum, and urine using direct competitive enzyme‐linked immunosorbent assays. Liver fibrosis and steatosis were measured by transient elastography. Linear and non‐linear associations of cyanotoxin levels with degree of fibrosis and steatosis were evaluated in multivariate generalized linear and additive models. One or more cyanotoxins were variably detected in all individuals. Moderate to severe fibrosis or cirrhosis was present in 18% and moderate to severe steatosis in 53%. Positive associations with fibrosis level were observed for salivary cyanotoxins: MC/NOD (linear: β = 9.07, 95% confidence interval [CI] 1.32–16.82, p = .022; non‐linear p = .0011); CYN (linear: β = 24.21, 95% CI 14.12–34.30, p p = .0001); AB (non‐linear p = .0125). A positive association with steatosis level was observed for serum MC/NOD (non‐linear p = .0120). Non‐linear associations of cyanotoxins with fibrosis were specific to defined concentrations. Our novel findings suggesting that cyanotoxins are independent risk factors for liver disease are consistent with our prior study linking oral cyanobacteria to hepatocellular carcinoma and may have global implications for liver cancer prevention.
27. Barrier layer formation and dynamics in the Red Sea based on Argo profiles and sea level anomaly analysis
作者Authors: Hadeel A. Alsayed; Mohammed A. Alsaafani; Turki M. Alraddadi
发表月份Publication month: 2026（月份未核准） 2026 (month not verified)
OCEANOLOGIA · DOI: 10.5697/uhuo2457
关键词Tags: BGC-Argo; vertical structure BGC-Argo; vertical structure
摘要：本研究基于 2012 年至 2018 年 Argo 浮标观测并结合海平面异常 (SLA) 数据，首次对红海 (RS) 中的屏障层 (BL) 进行全面调查。 BL被定义为基于温度的混合层(MLT)和基于密度的混合层(MLD)之间的层。 RS 分为三个区域：北部 (26°N–22°N)、中部 (22°N–18°N) 和南部 (18°N–14°N)，以分析 BL 的时空变化。结果显示，冬季所有三个地区都存在 BL，其中 1 月至 2 月观察到最大厚度，到 4 月衰减，夏季几乎没有 BL。由于冬季降温和对流，BL 在北部最厚，盐度层化加深了 MLD 下方的 MLT。盆地中部较为温和、持续，南部较薄、持续时间较短。 浮力频率和盐度分析证实，盐分分层稳定了水柱并维持了屏障层。 SLA 数据用于检查中尺度涡流的影响，表明反气旋涡流（AE）通过会聚和下降流增加底线厚度，而气旋涡流（CE）倾向于通过浅化混合层来侵蚀底线厚度。在RS北部，CE内部有时会出现不寻常的深层混合层，这与冬季对流翻转一致。这些发现首次描述了 BL 特征，提高了我们对红海上层海洋动力学、垂直混合和气候相互作用的理解。
Abstract: This study presents the first comprehensive investigation of the barrier layer (BL) in the Red Sea (RS) based on Argo float observations from 2012 to 2018, combined with sea level anomaly (SLA) data. The BL is defined as the layer between the temperature-based mixed layer (MLT) and the density-based mixed layer (MLD). The RS is divided into three regions – north (26°N–22°N), central (22°N–18°N), and south (18°N–14°N) – to analyze the spatial and temporal variability of the BL. The results show strong evidence of BL presence in all three regions during winter, with maximum thickness observed in January–February, decay by April, and almost no BL during summer. The BL is thickest in the north due to winter cooling and convection, with salinity stratification deepening the MLT below the MLD. It is more moderate and persistent in the central basin, and thinner and short-lived in the south. Buoyancy frequency and salinity analysis confirm that haline stratification stabilizes the water column and sustains the barrier layer. SLA data were used to examine the impact of mesoscale eddies, indicating that anticyclonic eddies (AEs) enhance BL thickness through convergence and downwelling, whereas cyclonic eddies (CEs) tend to erode the BL by shoaling the mixed layer. In the northern RS, unusual deep mixed layers sometimes occur within CEs, which is consistent with the convective overturning during winter. These findings provide the first description of BL characteristics, which improve our understanding of Red Sea upper ocean dynamics, vertical mixing, and climate interactions.
28. Sensitivity analysis of soil particulate organic carbon to sea-level rise in coastal salt marsh
作者Authors: Zhimeng Liang; Ocean University of China, Shandong Qingdao 266000, China
发表月份Publication month: 2026-04 2026-04
Ingegneria Sismica · DOI: 10.65102/is2026537
关键词Tags: carbon pump carbon pump
摘要：本研究旨在提高滨海盐沼湿地土壤颗粒有机碳（POC）响应海平面上升的监测和预测能力，为滨海湿地碳库管理提供科学依据。本文构建了基于多源环境数据的集成学习敏感性模型，并比较了随机森林（RF）和XGBoost等机器学习方法的预测性能。数据包括海拔、洪水频率、孔隙水盐度、沉降速率、植被指数和土壤粒径等多维变量。数据用缺失值进行估算，排除异常值并标准化。结合Shapley加性解释值（SHAP），分析各环境因素对POC敏感性的贡献及地区差异。 结果表明，沿海低洼盐沼POC对海平面上升扰动最为敏感，中部盐沼和内陆高盐沼的响应依次减弱，表现出明显的空间异质性。在典型的盐沼地区，模型的预测R²可以达到0. 88，RMSE和MAE分别为0. 015和0. 012，表明集成学习方法在捕捉环境变量的非线性耦合和空间异质性方面具有良好的性能。 SHAP分析表明，洪水频率、沉积速率和孔隙水盐度是POC变化的关键驱动因素，其方向和强度因地区条件而异。该研究为滨海湿地的蓝碳管理、生态恢复和数字监测提供定量方法和决策支持。
Abstract: This study aims to improve the monitoring and prediction ability of soil particulate organic carbon (POC) in coastal salt marsh wetlands in response to sea level rise, and provide a scientific basis for carbon pool management in coastal wetlands. This paper constructs an ensemble learning sensitivity model based on multi-source environmental data, and compares the prediction performance of machine learning methods such as Random Forest (RF) and XGBoost. The data included multi-dimensional variables such as elevation, flooding frequency, pore water salinity, sedimentation rate, vegetation index and soil particle size. The data were imputed with missing values, excluded with outliers and standardized. Combined with the Shapley additive explanatory value (SHAP), the contribution of each environmental factor to the sensitivity of POC and regional differences were analyzed. The results show that the POC of coastal low-lying salt marshes is the most sensitive to sea rise disturbance, and the response of central salt marshes and inland high salt marshes is weakened in turn, showing obvious spatial heterogeneity. In the typical salt marsh area, the predicted R² of the model can reach 0.88, RMSE and MAE are 0.015 and 0.012, respectively, indicating that the ensemble learning method has good performance in capturing the nonlinear coupling and spatial heterogeneity of environmental variables. SHAP analysis showed that flooding frequency, deposition rate and pore water salinity were the key drivers of POC change, and their direction and strength varied with regional conditions. This study provides quantitative methods and decision support for blue carbon management, ecological restoration and digital monitoring of coastal wetlands.
29. Satellite-derived phytoplankton biomass dynamics in an equatorial Atlantic archipelago
作者Authors: Nikolas Heinz; Cesar A.M.M. Cordeiro; Carlos Rafael Borges Mendes; Fernanda Giannini
发表月份Publication month: 2026-05 2026-05
Journal of Marine Systems · DOI: 10.1016/j.jmarsys.2026.104218
关键词Tags: phytoplankton phytoplankton
摘要：Crossref 未提供该 DOI 的摘要。
Abstract: Crossref did not provide an abstract for this DOI.
