Climate Change Impacts on the Patagonian Shelf Break Front
Climate Change Impacts on the Patagonian Shelf Break Front
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DOI：
10.1029/2021gl096513
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发表时间：
2022-02
影响因子：
5.2
通讯作者：
B. Franco;L. Ruiz-Etcheverry;M. Marrari;A. Piola;R. Matano
中科院分区：
文献类型：
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作者：
B. Franco;L. Ruiz-Etcheverry;M. Marrari;A. Piola;R. Matano
利用27年（1993-2019）的卫星数据，研究了巴塔哥尼亚陆架断裂锋（SBF）的海表温度（SST）、绝对动态地形和叶绿素a （CHL）的长期趋势。阿根廷大陆架水域的变暖和巴西-马尔维纳斯汇合流（BMC）的西南移动影响了SBF的最北端延伸。马尔维纳斯海流（MC）的冷却和邻近大陆架水域的同步变暖导致沿外大陆架海温梯度的显著增加。BMC的西南移动暗示了SBF的类似移动。CHL趋势的增加似乎与沿陆架断裂的南风异常有关。我们估计MC的最北端渗透向南移动为- 0.11±0.076°/ 10年。
We characterize long‐term trends of sea surface temperature (SST), absolute dynamic topography, and chlorophyll‐a (CHL) in the Patagonian shelf break front (SBF) using 27 years (1993–2019) of satellite data. Warming of the Argentinean shelf waters and the southwestward displacement of the Brazil‐Malvinas Confluence (BMC) impact the northernmost extension of the SBF. Cooling of the Malvinas Current (MC) and the concurrent warming of the adjacent shelf waters lead to a significant increase of SST gradients along the outer shelf. The southwestward displacement of the BMC implies a similar shift of the SBF. An increase in CHL trend appears to be associated with southerly wind anomalies along the shelf break. We estimate a southward shift of the northernmost penetration of the MC of −0.11 ± 0.076°/decade.