Paper Push: 2026-06-27
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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 3 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, 3 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
Amor, ch'al cor gentil ratto s'apprende.
Dante, Commedia, Inferno V, 100; Italian original from Kalliope
Francesca 叙述爱情时说，爱会迅速抓住高贵的心。这句显示但丁把爱情写得美丽又危险。
Francesca says that love quickly takes hold of a gentle heart. The line shows love as both beautiful and dangerous.
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.
其他相关期刊：按主题相关性补充Other relevant journals: topical supplements
1. Phytoplankton phenology through gene expression during the North Atlantic spring bloom decline
作者Authors: Meredith G Meyer; Olivia Torano; Natalia L Llopis-Monferrer; Nicolas Cassar; Melanie R Cohn; Mark A Brzezinski; Adrian Marchetti
发表月份Publication month: 2026-06 2026-06
ISME Communications · DOI: 10.1093/ismeco/ycag179
关键词Tags: carbon pump; phytoplankton; ocean colour carbon pump; phytoplankton; ocean colour
摘要：虽然每年北大西洋春季水华中的浮游植物动态已得到很好的表征，但驱动这些变化的生理基础及其对该地区生物地球化学的净影响却知之甚少。浮游植物代谢既受该地区营养循环、初级生产以及最终碳输出命运的影响，也影响着该地区的营养循环、初级生产。因此，了解这些过程至关重要。作为美国宇航局远程传感计划向北大西洋开展的海洋出口过程的一部分，测量了浮游植物生物量、生物率和基因表达数据以及相关的环境参数，以评估春季开花期间四个最主要的浮游植物群（硅藻、甲藻、附着藻和叶绿藻）内这些过程之间的关系。 我们观察到从活跃硅藻生长主导时期（定义为第一阶段）到非硅藻浮游植物群主导时期（第二阶段）的转变。硅酸消耗似乎限制了总体产量并减少了来自硅藻的竞争，可能导致第二阶段固定藻的贡献增强。在整个观察期间，参与细胞维持、光合作用以及氮和维生素代谢的关键蛋白质编码基因的表达在不同类群中存在差异。参与硅运输的硅藻基因的表达模式与参与硝酸盐同化和光合作用的硅藻基因的表达模式不相关，这表明生长的变化可能与硅化无关。 我们的分析表明，不同的硅酸浓度如何对浮游植物群落结构产生重大影响并调节初级生产，从而有助于总体水华下降。
Abstract: While phytoplankton dynamics in the annual North Atlantic spring bloom have been well characterized, the physiological underpinnings driving these changes and their net impact on the biogeochemistry of the region are less understood. Phytoplankton metabolism is both affected by, and influences the region’s nutrient cycling, primary production, and ultimately, the fate of carbon export. Thus, developing an understanding of these processes is critical. Phytoplankton biomass, biological rates, and gene expression data along with associated environmental parameters were measured as part of the NASA EXport Processes in the Ocean from RemoTe Sensing program’s campaign to the North Atlantic to evaluate the relationships amongst these processes within the four most dominant phytoplankton groups (diatoms, dinoflagellates, haptophytes, and chlorophytes) during the spring bloom. We observe a transition from a period dominated by active diatom growth (defined as Phase I) to a period dominated by non-diatom phytoplankton groups (Phase II). Silicic acid depletion appears to limit overall production and reduce competition from diatoms, likely leading to enhanced contributions of haptophytes in Phase II. Expression of key protein-encoding genes involved in cell maintenance, photosynthesis, and nitrogen and vitamin metabolisms varied amongst the taxa throughout the observation period. Expression patterns of diatom genes involved in silicon transport are uncoupled with those involved in nitrate assimilation and photosynthesis, suggesting a change in growth which may be uncoupled from silicification. Our analysis demonstrates how variable silicic acid concentrations can have a significant effect on phytoplankton community structure and regulate primary production, aiding in overall bloom decline.
2. Evaluating Heavy Metal and Physicochemical Pollution in the Karnaphuli River Estuary through Remote Sensing and Machine Learning Approaches
作者Authors: Sheikh Samanin Tasnim; Mahima Yusuf Tarana; Dr. Mohammad Moniruzzaman; Sadia Afrin; Shamiha Shafinaz Shreya
发表月份Publication month: 2026-06 2026-06
Journal of Earth Observation and Geospatial Applications · DOI: 10.65372/qgarvs44
关键词Tags: ocean colour; ocean optics ocean colour; ocean optics
摘要：卡纳普利河对周边流域的环境和社会经济状况具有重大影响，分析和监测污染对于管理河流水质至关重要。该研究的目的是结合实验室测试、Sentinel-2A 卫星图像分析和卡纳普利河口的机器学习，评估并建立水中物理化学和重金属污染之间的相关性。卡纳普里的水样中发现了高浓度的重金属，如12. 8 mg/L铝（Al）、15. 5 mg/L铁（Fe）和其他污染物。使用 GIS 插值图对连续水污染值进行可视化，显示靠近海岸的沉船区域污染程度较高。 本研究基于遥感反射率数据，确定多元线性回归（MLR）和主成分回归（PCR）是预测水质参数变异性的最有效模型。 Sentinel-2A 波段的卫星反射率产生了显着的结果，并预测了卡纳普利河中总悬浮固体 (TSS) 的 58%（最高）变异性和 43%（最低）的 pH 变异性。插值图旨在比栅格计算图更准确地表示污染水平，因为它们在整个建模过程中结合了基于观测值的空间自相关技术。 该分析提供了对污染动态的见解，有助于优先关注减少工业排放，鼓励对污水处理进行必要的基础设施投资，并利用遥感和机器学习进一步研究和数字化水质测量。
Abstract: The Karnaphuli River has critical impacts on the environmental and socio-economic situation of the surrounding catchment region, and it is crucial to analyze and monitor pollution for managing river water quality. The objective of the research was to evaluate and establish correlations between physicochemical and heavy metal pollution in water and a combination of laboratory testing, Sentinel-2A satellite imagery analysis, and machine learning for the Karnaphuli River estuary. High concentrations of heavy metals such as 12.8 mg/L Aluminum (Al), 15.5 mg/L Iron (Fe) and other pollutants have been found in the water samples of Karnaphuli. Continuous water pollution values were visualized using GIS interpolation maps, which showed a higher level of pollution in shipwrecking regions near the coast. Multiple linear regression (MLR) and principal component regression (PCR) were identified as the most effective models for predicting the variability of water quality parameters for this study based on remote sensing reflectance data. The satellite reflectance of Sentinel-2A bands produced significant results and predicted 58% (highest) of the variability of total suspended solids (TSS) and 43% (lowest) of the variability of pH in the Karnaphuli River. The interpolation maps aim to represent pollution levels more accurately than the raster calculation maps, as they incorporate spatial autocorrelation techniques based on observed values throughout the modeling process. This analysis provides insights into the dynamics of pollution, aids in prioritizing attention to reducing industrial discharges, encourages necessary infrastructural investments for sewage treatment, and further study and digitization of water quality measurement using remote sensing and machine learning.
3. Modulation of internal tides properties off the Vitória–Trindade ridge during contrasted seasons from altimetry and a regional ocean model
作者Authors: Perrine Bauchot; Ariane Koch-Larrouy; Michel Tchilibou; Loren Carrère; Fabrice Hernandez; Guillaume Morvan; Jérôme Chanut
发表月份Publication month: 2026-06 2026-06
Ocean Science · DOI: 10.5194/os-22-2011-2026
关键词Tags: ocean biogeochemistry ocean biogeochemistry
摘要：通过与中尺度涡流和其他瞬态海洋特征相互作用而产生的内潮汐的不相干部分仍然知之甚少且难以预测。这限制了我们准确表示这些波引起的能量转移和混合的能力。巴西大陆架外的维多利亚-特林达德海岭是研究这些过程的相关自然实验室，是一个中尺度活动强烈的区域内潮汐产生的热点。为了评估季节性分层和中尺度变率如何调节内潮汐，我们将 27 年的卫星测高记录与使用 NEMO v4 进行的高分辨率 (1/36°) 区域模拟进行了比较。 0.2. 这项联合分析使我们能够描述两种对比情况下内潮汐的产生、传播和消散的特征：以深密斜斜为特征的南方冬季（此处定义为五月至十月），以及以较浅且较尖锐的季节性密斜斜为特征的南方夏季（此处定义为十一月至四月）。模型和观测都描绘了从山脊向南传播的六个强烈的同相斜压通量光束。前两个光束的波长大约为 100 km，对应于传播模式 1，而更远的光束间隔仅约 50 km，这可能对应于传播模式 2。模型量化显示，夏季发电率比冬季高 5%–15%。耗散主要发生在海脊附近 (45%)，但也延伸到离岸 (40%)，达到 2-3 模 1 波长之外。 在开阔的海洋中，冬季的耗散强度高达 40%，导致与夏季相比，斜压通量在更短的距离内传播更弱。高度测量可确认波长和振幅的季节性变化，尤其是 2 型内潮汐。最后，记录了夏季条件下内潮汐与中尺度涡流之间相互作用的典型案例，显示了斜压通量的偏差和衍射。这项研究表明，中尺度变率和季节分层共同调节内潮汐的相干性和能量路径。这些发现对于改进非相干潮汐的预测和解释高分辨率高度观测至关重要。
Abstract: The incoherent fraction of internal tides, generated through interactions with mesoscale eddies and other transient oceanic features, remains poorly understood and challenging to predict. This limits our ability to accurately represent energy transfers and mixing induced by these waves. The Vitória–Trindade Ridge off the Brazilian shelf is a relevant natural laboratory to investigate these processes, as a hotspot for internal tides generation embedded in a region of intense mesoscale activity. To assess how seasonal stratification and mesoscale variability modulate internal tides, we compared a 27-year satellite altimetry record with a high-resolution (1/36°) regional simulation using NEMO v4.0.2. This joint analysis allows us to characterize the generation, propagation, and dissipation of internal tides under two contrasted regimes: austral winter (defined here from May to October) marked by a deep pycnocline, and austral summer (defined here from November to April) with a shallower and sharper seasonal pycnocline. Both model and observations depict six intense, in-phase beams of the baroclinic flux propagating southward from the ridge. The first two have a wavelength of 100 km approximately corresponding to the mode-1 of propagation, while more distant beams are spaced by about 50 km only, which likely corresponds to the mode-2 of propagation. Quantification from the model shows that generation rates are 5 %–15 % higher in summer than in winter. Dissipation occurs predominantly near the ridge (45 %) but also extends offshore (40 %), reaching beyond 2–3 mode-1 wavelengths. In the open ocean, dissipation is up to 40 % stronger in winter, leading to a weaker baroclinic flux propagating on shorter distances compared to summer. Altimetry confirms seasonal variations in both wavelength and amplitude, especially for mode-2 internal tides. Finally, a representative case of interaction between internal tides and a mesoscale eddy is documented under summer conditions, showing deviation and diffraction of the baroclinic flux. This study demonstrates that mesoscale variability and seasonal stratification jointly modulate the coherence and energy pathways of internal tides. These findings are essential for improving predictions of the incoherent tide and for interpreting high-resolution altimetric observations.
