Paper Push: 2026-07-15
Back to date list
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 7 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, 7 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
Lasciate ogne speranza, voi ch'intrate.
Dante, Commedia, Inferno III, 9; Italian original from Kalliope
这是地狱门上的警句，意为“进入这里的人，放弃一切希望”。原文里的 ogne 和 ch'intrate 保留了中古意大利语色彩。
This is the warning at the gate of Hell: those who enter must abandon hope. Today it can describe a severe situation with almost no easy way back.
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.
Nature 系列Nature series
1. Key link between iron and the size structure of three major mesoplanktonic groups in the upper ocean
作者Authors: Mathilde Dugenne; Marco Corrales-Ugalde; Jessica Y. Luo; Lars Stemmann; Jean-Olivier Irisson; Fabien Lombard; Todd O’Brien; Charles Stock; et al.
发表月份Publication month: 2026-07 2026-07
Nature · DOI: 10.1038/s41467-026-75355-4
关键词Tags: carbon pump carbon pump
摘要：在海洋生态系统中，鱼类生产、碳输出或通过 N 2 固定输送营养物质等关键服务在很大程度上依赖于中上层生物体的大小范围，特别是中浮游生物 (200-20,000 µ m)。然而，环境因素与中层浮游生物光谱生物地理学之间的联系在很大程度上仍未得到解决，因为到目前为止，只有有限的数据集可以了解中层浮游生物大小的大规模变化。通过对 Rhizarian、殖民 N 2 -fixer 和甲壳动物图像的全球汇编，我们揭示了铁在塑造这些群体的大小结构和相关生物地理学中的作用。我们的研究结果强调了大气铁源对于N 2 固定剂和根茎植物的重要性，而总铁（占有机和无机化合物的比例）似乎可以通过表观循环来解释甲壳类动物大小结构差异的很大一部分。 使用环境解释变量，我们的模型达到了较高的 R 2 （分别为 0. 93、0. 88 和 0. 79），提供了与元素循环和生态系统服务相关的中浮游生物大小结构的可靠预测。我们的结果表明，如果没有补偿机制，未来全球气温的升高可能会对中层浮游生物的大小产生负面影响，可能会限制从生产层到封存深度的碳输出，这可能会被铁输入的预期增加所抵消，铁输入的增加有利于N 2 固定者、根茎动物和最终的甲壳类动物。
Abstract: In marine ecosystems, critical services like fish production, carbon export, or the delivery of nutrients through N 2 -fixation rely heavily on the size spectrum of pelagic organisms, particularly mesoplankton (200-20,000 µ m). However, the linkages between environmental factors and mesoplankton spectral biogeography remain largely unresolved, as so far only limited datasets exist to understand the large-scale shifts in mesoplankton size. Using global compilations of Rhizarian, colonial N 2 -fixer, and Crustacean images, we reveal the role of iron in shaping the size structure and related biogeography of these groups. Our findings underscore the importance of atmospheric sources of iron for N 2 -fixers and Rhizarians while total iron, accounting for organic and inorganic compounds, appeared to explain a high percentage of the variance in Crustacean size structure via apparent recycling. Using environmental explanatory variables, our models reached high R 2 (0.93, 0.88, and 0.79 respectively), providing robust predictions of mesoplankton size structure related to elemental cycling and ecosystem services. Our results suggest that without compensatory mechanisms, future increases in global temperatures could have negative effects on mesoplankton size, possibly limiting carbon export from the productive layers to sequestration depth, that might be offset by expected increases in iron inputs that benefit N 2 -fixers, Rhizarians, and eventually Crustaceans.
重点期刊：按影响力和相关性排序Key journals: ordered by impact and relevance
2. Four-Dimensional Glider fleet survey reveals small mesoscale eddy merging and splitting dynamics
作者Authors: Nikolaos D. Zarokanellos; Daniel L. Rudnick; Baptiste Mourre; Maximo Garcia-Jove; Pierre F. J. Lermusiaux; Joaquín Tintoré
发表月份Publication month: 2026-07 2026-07
Oceanography · DOI: 10.1175/jpo-d-25-0158.1
关键词Tags: phytoplankton; backscattering; vertical structure phytoplankton; backscattering; vertical structure
摘要：八架滑翔机在地中海西部巴利阿里海进行了为期三个月的四维调查，用于研究中尺度涡流的演化和变化以及相关的物理过程，包括锋生和俯冲。联合滑翔机机队在地面上空飞行了近 15978 公里，执行了 704 个滑翔机日，同时完成了超过 4837 次潜水，最深可达 700 m，测量温度、盐度、速度、叶绿素荧光、氧气和声学反向散射。数据客观地映射到 10 m 垂直空间和时间水平上。使用欧米茄方程估算垂直和地转水平速度。 2022 年 4 月 29 日，在不对称气旋涡流 (CE) 中观测到等密度面抬升 28. 9 kg/m 3 ，10 km 内约 70 m，宽度约 25 km，长度约 35 km。 下降速度约为 20 m/天，CE 轴向西移动。第一次CE衰变后，28. 9等重浅滩再次在东部形成，同时形成另一个CE，相对涡度达到~0。 5f.在 CE 增长期间，涡轴向西移动，在涡旋增强期间，向下速度约为 25 m/天。然后，新的气旋特征扩散开来，并于 5 月 2 日再次分裂成两个约 15 公里的 CE。两个较小的 CE 向北和向西移动，直到消失。在它们的分离范围内形成了反气旋结构（约 20 公里）。滑翔机观测显示，在约 10 公里范围内水平密度梯度高达 0. 5 kg/m 3 。通过生化示踪剂在额界面附近观察到上升流和下降流。
Abstract: A four-dimensional, three-month-long survey by eight gliders at the Balearic Sea in the western Mediterranean Sea was used to examine the evolution and variability of mesoscale eddies and related physical processes, including frontogenesis, and subduction. The combined glider fleet covered nearly 15978 km over the ground, performing 704 glider days while completing over 4837 dives to as deep as 700 m, measuring temperature, salinity, velocity, chlorophyll fluorescence, oxygen, and acoustic backscatter. The data was objectively mapped on 10 m vertical levels in space and time. Vertical and ageostrophic horizontal velocities were estimated using the omega equation. Uplift of the isopycnal surface, 28.9 kg/m 3 , ~70 m in 10 km, was observed in an asymmetric cyclonic eddy (CE) on April 29, 2022, with ~25 km width and ~35 km length. Downward velocities of ~20 m/day developed, with the CE axis shifted westward. After the first CE decay, the 28.9 isopycnal shoaled again in the east as another CE formed, where relative vorticity reached ~0.5f. The eddy axis shifted westward during CE growth, and the downward velocities were ~25 m/day during the eddy intensification. Then, the new cyclonic feature spread over before splitting again into two ~15 km CEs on May 2. The two smaller CEs proceeded north and west until they vanished. An anticyclonic structure (~20 km) developed within their separation. The glider observations reveal horizontal density gradients up to 0.5 kg/m 3 over ~10 km. Both upwelling and downwelling were observed near the frontal interface by biochemical tracers.
重点关注团队Focused team
3. Evaluation of a satellite-derived Astaxanthin Equivalent Index against in situ zooplankton and right whale observations in the Gulf of Maine
作者Authors: Rebekah Shunmugapandi; Catherine Mitchell; Cait L McCarry; Christine A Hudak; Daniel M Palacios; Nicholas R Record
发表月份Publication month: 2026-07 2026-07
ICES Journal of Marine Science · DOI: 10.1093/icesjms/fsag122
关键词Tags: phytoplankton; ocean colour; bio-optics phytoplankton; ocean colour; bio-optics
摘要：海洋颜色遥感主要用于监测表面浮游植物的分布，但最近的发展已将其应用扩展到检测更高营养级的生物。桡足类Calanus finmarchicus含有类胡萝卜素色素虾青素，它具有可以被卫星传感器检测到的特定光学信号。在缅因湾 (GoM)，C. finmarchicus 作为主要桡足类物种和濒临灭绝的北大西洋露脊鲸 (Eubalaena glacialis) 的主要猎物发挥着至关重要的生态作用。这项研究以 GoM 为重点，评估了卫星衍生的虾青素当量指数 (AEI)，作为富含虾青素的浮游动物表面丰度的代表。 将 MODIS-Aqua 卫星 2003 年至 2022 年 AEI 估计值与来自连续浮游生物记录仪近地表横断面的阶段和物种解析浮游动物原位数据以及来自其他项目的深度分层网牵引和圆锥网表面和倾斜牵引数据进行了比较。使用阶段和物种特定的颜料缩放将原位丰度值转换为 AEI 单位 (μg/m3)。虽然 AEI 是针对 C. finmarchicus 进行校准的，但比较表明卫星信号还包括其他含虾青素类群的贡献，特别是 Centropagestypicus。当考虑来自 C. finmarchicus 和 C.typicus 的虾青素含量时，观察到更强的对应性，但不同数据集的相关程度有所不同。 这种变化可能反映了卫星由于其他富含虾青素的信号而高估，也可能受到原位采样方法差异的影响。高卫星 AEI 值与科德角湾露脊鲸表面撇食的行为观察同时出现，表明 AEI 产品可能有助于描述该物种潜在的摄食栖息地。这些比较凸显了基于虾青素的卫星指数在浮游动物监测和露脊鲸栖息地评估中补充现场观测的潜力。
Abstract: Ocean color remote sensing has primarily been used to monitor surface phytoplankton distributions, but recent developments have extended its application to detecting higher trophic-level organisms. The copepod Calanus finmarchicus contains the carotenoid pigment astaxanthin, which has specific optical signals that can be detected by satellite sensors. In the Gulf of Maine (GoM), C. finmarchicus plays a critical ecological role as the dominant copepod species and a key prey item for the endangered North Atlantic right whale (Eubalaena glacialis). This study, focusing on the GoM, evaluates a satellite-derived Astaxanthin Equivalent Index (AEI), as a proxy for surface abundance of astaxanthin-rich zooplankton. MODIS-Aqua satellite AEI estimates from 2003 to 2022 were compared with stage- and species-resolved in situ zooplankton data from Continuous Plankton Recorder near-surface transects, as well as with depth-stratified net tows and conical-net surface and oblique tows from other programs. In situ abundance values were converted into AEI units (μg/m3) using stage- and species-specific pigment scaling. While the AEI was calibrated for C. finmarchicus, comparisons indicated that the satellite signal also included contributions from other astaxanthin-containing taxa, particularly Centropages typicus. Stronger correspondence was observed when astaxanthin content from both C. finmarchicus and C. typicus was considered, but the degree of correlation varied across datasets. This variability likely reflects satellite overestimation due to other astaxanthin-rich signals and may also be influenced by differences in in situ sampling methods. High satellite AEI values co-occurred with behavioral observations of right whale surface skim-feeding in Cape Cod Bay, indicating that AEI products may help characterize potential feeding habitats for the species. These comparisons highlight the potential of astaxanthin-based satellite indices to complement field observations in zooplankton monitoring and right whale habitat assessment.
4. Temperature effects in an optimality-based phytoplankton growth model
作者Authors: David Moncayo; Markus Schartau; Alexey Ryabov; Stefanie Moorthi; Markus Pahlow
发表月份Publication month: 2026-06 2026-06
Journal of Plankton Research · DOI: 10.1093/plankt/fbag054
关键词Tags: phytoplankton phytoplankton
摘要：浮游植物是全球海洋生物地球化学循环的关键驱动因素，但它们对海洋变暖的反应仍然难以预测，部分原因是生理过程的温度依赖性尚不清楚。这项研究扩展了基于最优性的浮游植物生长模型，以包括对温度的代谢反应。使用微观数据，我们确定了两个显示出大致一致的温度响应的关键参数：最大吸收率 (V0) 和叶绿素合成成本 (zC)。我们评估了温度依赖性物种特异性 (SS) 和非物种特异性 (nSS) 模型配置在重现微观实验数据时相对于非温度依赖性物种特异性控制模型 (noTemp) 的准确性。 我们的结果表明，明确考虑生理参数的温度依赖性可以显着改善浮游植物生物量生产、氮吸收和化学计量的预测。 SS 配置在预测颗粒有机碳、叶绿素-a 和营养物（DIN、DIP）方面始终优于其他设置，而 nSS 配置的性能仍然明显优于 (SS) noTemp 配置。这些发现强调了在生态模型中考虑温度依赖性对于浮游植物对环境变化的未来预测的重要性。
Abstract: Phytoplankton are a key driver of global marine biogeochemical cycles, but their response to ocean warming remains difficult to predict, partly because the temperature-dependence of physiological processes is not well understood. This study extends an optimality-based phytoplankton growth model to include metabolic responses to temperature. Using microcosm data, we identify two key parameters showing roughly consistent temperature responses: maximum uptake rate (V0) and chlorophyll synthesis cost (ζC). We assess the accuracy of temperature-dependent species-specific (SS) and non-species-specific (nSS) model configurations in reproducing microcosm experimental data, relative to a non-temperature-dependent, species-specific control model (noTemp). Our results demonstrate that explicitly accounting for temperature-dependence of physiological parameters can significantly improve predictions of phytoplankton biomass production, nitrogen uptake and stoichiometry. The SS configuration consistently outperforms other setups in predicting particulate organic carbon, chlorophyll-a and nutrients (DIN, DIP), while the nSS configuration still performs substantially better than the (SS) noTemp configuration. These findings underscore the importance of accounting for temperature-dependence in ecological models for future projections of phytoplankton responses to environmental change.
其他相关期刊：按主题相关性补充Other relevant journals: topical supplements
5. Oceanographic Indicators of Seasonal Variability in the Guajira Upwelling System and Their Relationship with Phytoplankton
作者Authors: Jhon Carlos Salon-Barros; Rafael Ricardo Torres-Parra; Digna Rueda-Roa; Frank Muller-Karger
发表月份Publication month: 2026-07 2026-07
Oceans · DOI: 10.3390/oceans7040062
关键词Tags: phytoplankton phytoplankton
摘要：瓜希拉上升流系统 (GUS) 位于 10 至 12 之间。北纬 5°，纬度 61–75。西经 5°，加勒比海中南部。本研究使用源自 GUS 和附近不受沿海上升流影响的加勒比地区（西经 78–68°，北纬 10–16°）之间的温度、盐度、密度和绝对动态地形的表面差异的上升流指数来研究其空间和季节变化。分析了 1998 年至 2022 年的每周时间序列。将基于差异的指数与埃克曼运输（上升流强度的传统代表）进行比较，并与卫星衍生的叶绿素-a 进行比较，以评估浮游植物的响应。在系统沿线的四个代表性网格点进一步检查季节性周期。在这些指数中，海面温度最有效地描绘了 GUS 的空间范围和季节变化。 与叶绿素-a 的比较显示，北部地区（西经 73. 5° 以东）存在强烈的上升流与生物量关系，而南部地区的生产力主要并非由沿海上升流驱动。相关图表明，上升流影响的减弱与马格达莱纳河羽流影响的区域一致。
Abstract: The Guajira Upwelling System (GUS) is located between 10–12.5° N and 61–75.5° W in the Southern–Central Caribbean Sea. This study examines its spatial and seasonal variability using upwelling indices derived from surface differences in temperature, salinity, density, and absolute dynamic topography between the GUS and a nearby Caribbean region (78–68° W, 10–16° N) not affected by coastal upwelling. Weekly time series from 1998 to 2022 were analyzed. The difference-based indices were compared with Ekman transport, a conventional proxy for upwelling intensity, and with satellite-derived chlorophyll-a to evaluate the phytoplankton response. Seasonal cycles were further examined at four representative grid points along the system. Among the indices, sea surface temperature most effectively delineated the spatial extent and seasonal variability of the GUS. Comparisons with chlorophyll-a revealed a strong upwelling–biomass relationship in the northern sector (east of 73.5° W), whereas productivity in the southern sector was not primarily driven by coastal upwelling. Correlation maps indicated that the weakening of upwelling influence coincided with the region affected by the Magdalena River plume.
6. Geovisualizing land degradation risk in Southeast Brazil Using remote sensing and GIS-based assessment
作者Authors: Mohammad AlAbed; Turkia Almoustafa; Roberson Pimentel; Fábio F. Dias
发表月份Publication month: 2026-07 2026-07
Scientific Reports · DOI: 10.1038/s41598-026-49578-w
关键词Tags: ocean colour ocean colour
摘要：土地退化对生态系统服务和可持续发展构成严重威胁，特别是在土地利用快速转变的地区。本研究采用综合地理空间方法，结合遥感、地理信息系统 (GIS) 和空间多标准分析，评估和可视化巴西东南部战略沿海地区（里约热内卢州）的土地退化风险。利用联合国环境规划署的优先行动计划区域活动中心（UNEP-PAP/RAC）框架应用于最近的卫星图像，我们生成了空间明确的地图，将土地分为稳定和不稳定类别。开发了一个结合生物物理和社会经济变量的地理空间优先顺序模型，以识别保护热点并支持决策。结果显示，68. 4% 的景观是稳定的，主要由具有农业和森林潜力的未管理地区组成，而 7. 8% 是不稳定的，片状侵蚀集中在农业边界。优先级测绘将 51. 7% 的区域分类为稳定中优先级，揭示了广泛的潜在脆弱性，将 4. 6% 的区域分类为不稳定高优先级，需要紧急干预。对土地利用变化（1985-2024）的补充分析强调了城市扩张 199% 和农业镶嵌物下降 34%，强调了人为驱动因素。这项研究不仅在潮湿的热带沿海环境中验证了 PAP/RAC 框架，而且还提供了可操作的地理可视化输出和用于有针对性的土地管理的空间决策支持工具，为巴西的土壤保护和可持续发展政策做出了贡献。
Abstract: Land degradation poses a critical threat to ecosystem services and sustainable development, especially in regions experiencing rapid land-use transitions. This study employs an integrated geospatial approach—combining remote sensing, geographic information systems (GIS), and spatial multi-criteria analysis—to assess and visualize land degradation risk in a strategic coastal region of southeastern Brazil (Rio de Janeiro State). Using the United Nations Environment Programme’s Priority Actions Programme Regional Activity Centre (UNEP-PAP/RAC) framework applied to recent satellite imagery, we generated spatially explicit maps classifying land into stable and unstable categories. A geospatial prioritization model incorporating biophysical and socio-economic variables was developed to identify conservation hotspots and support decision-making. Results show that 68.4% of the landscape is stable, largely consisting of unmanaged areas with agricultural and forest potential, while 7.8% is unstable, with sheet erosion concentrated at agricultural frontiers. Priority mapping classified 51.7% of the area as Stable Medium Priority, revealing widespread latent vulnerability, and 4.6% as Unstable High Priority, necessitating urgent intervention. Complementary analysis of land-use change (1985–2024) highlighted a 199% urban expansion and a 34% decline in agricultural mosaics, underscoring anthropogenic drivers of degradation. This study not only validates the PAP/RAC framework in a humid tropical coastal setting but also delivers actionable geovisualization outputs and a spatial decision-support tool for targeted land management, contributing to soil conservation and sustainable development policy in Brazil.
7. Spatio-Temporal Assessment of Vegetation Dynamics for Forest Sustainability in Ouled Yagoub Forest, Khenchela, Algeria, from 1994 to 2025, Using GIS and Remote Sensing
作者Authors: Oussama Meghithi; Toufik Aliat; Mohamed S. Shokr
发表月份Publication month: 2026-07 2026-07
Sustainability · DOI: 10.3390/su18147201
关键词Tags: ocean colour ocean colour
摘要：地中海和半干旱山地森林越来越多地受到经常性干旱、野火、过度放牧和人为压力的影响，对森林可持续性产生直接影响。本研究利用 GIS 和遥感技术评估了 1994 年至 2025 年阿尔及利亚东北部肯切拉省 Ouled Yagoub 森林植被覆盖的时空动态。对多时相卫星图像（包括历史时期的 Landsat 数据和近年来的 Sentinel-2 数据）进行处理，以计算 NDVI、对 NDVI 衍生的植被覆盖类别进行分类，并检测 2021 年野火前后的植被变化。植被覆盖等级以公顷和百分比为单位进行量化，并制作了1994-2000年、2000-2010年、2010-2020年、2020-2021年、2021-2022年、2021-2025年和1994-2025年期间的NDVI变化图。 结果显示，植被茂密从1994年的14. 15%增加到2020年的20. 71%，表明火灾前植被状况有所改善。 2021 年野火之后，茂密的植被在 2021 年下降至 17. 44%，在 2022 年下降至 13. 44%，而植被极低的植被急剧增加至 2022 年 29. 79%。2021-2022 年期间表现出最强的植被负响应，32. 65% 的地图区域被归类为植被减少。到 2025 年，观察到部分恢复，2021 年至 2025 年间植被增加覆盖了地图面积的 20. 14%。然而，低植被仍然占主导地位，表明恢复不完全且空间异质。 这些发现强调了基于 NDVI 的多时相分析对于监测半干旱地中海山地森林退化、火灾后恢复和恢复规划优先领域的有用性，同时也支持具有类似生态限制的其他火灾多发地区的可持续森林管理。
Abstract: Mediterranean and semi-arid mountain forests are increasingly affected by recurrent drought, wildfire, overgrazing, and anthropogenic pressure, with direct implications for forest sustainability. This study assesses the spatio-temporal dynamics of vegetation cover in the Ouled Yagoub Forest, Khenchela Province, northeastern Algeria, from 1994 to 2025, using GIS and remote sensing. Multi-temporal satellite images, including Landsat data for historical periods and Sentinel-2 data for recent years, were processed to calculate NDVI, classify NDVI-derived vegetation-cover classes, and detect vegetation changes before and after the 2021 wildfire. Vegetation-cover classes were quantified in hectares and percentages, and NDVI change maps were produced for the periods 1994–2000, 2000–2010, 2010–2020, 2020–2021, 2021–2022, 2021–2025, and 1994–2025. Results showed that dense vegetation increased from 14.15% in 1994 to 20.71% in 2020, indicating improved pre-fire vegetation conditions. After the 2021 wildfire, dense vegetation decreased to 17.44% in 2021 and 13.44% in 2022, while very low vegetation increased sharply to 29.79% in 2022. The 2021–2022 period showed the strongest negative vegetation response, with 32.65% of the mapped area classified as vegetation decrease. By 2025, partial recovery was observed, with vegetation increase covering 20.14% of the mapped area between 2021 and 2025. However, low vegetation remained dominant, indicating incomplete and spatially heterogeneous recovery. These findings highlight the usefulness of NDVI-based multi-temporal analysis for monitoring forest degradation, post-fire recovery, and priority areas for restoration planning in semi-arid Mediterranean mountain forests, while also supporting sustainability-oriented forest management in other fire-prone regions with comparable ecological constraints.
