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- Title
Linking Phytoplankton Variability to Atmospheric Blocking in an Eastern Boundary Upwelling System.
- Authors
Chengfeng Le; Ming Wu; Hongwei Sun; Shang-min Long; Beck, Marcus W.
- Abstract
The oceanic ecosystems in the eastern boundary upwelling systems (EBUS) are expected to be influenced by climate change, but specific mechanisms describing their connections are not well understood. Using a 20-year time-series record of satellite and climate data, we identified a strong linkage between phytoplankton variability in a EBUS and a high latitude, large-scale atmospheric process. The winter-spring phytoplankton variability in the Canary Current Upwelling System was associated to the atmospheric blocking events over Greenland. These Greenland blocking events were primarily caused by the persistence of quasistationary, large-scale high atmosphere pressure fields. These fields forced the eddy-driven jet stream to shift south, which caused a weakening of the equatorward alongshore winds over the upwelling system. As a result, the wind-driven upwelling was suppressed, and phytoplankton growth was inhibited. These results identified a previously unknown source driving interannual phytoplankton variability in the EBUS, underscoring the importance of contributions of atmospheric connections on the coastal upwelling ecosystems.
- Subjects
GREENLAND; UPWELLING (Oceanography); PHYTOPLANKTON; JET streams; CLIMATE change
- Publication
Journal of Geophysical Research. Oceans, 2022, Vol 127, Issue 6, p1
- ISSN
2169-9275
- Publication type
Article
- DOI
10.1029/2021JC017348