Publication Date:
2022-10-26
Description:
Author Posting. © American Geophysical Union, 2021. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geophysical Research Letters 48(5), (2021): e2020GL091461, https://doi.org/10.1029/2020GL091461.
Description:
We investigate how the near-surface chlorophyll (CHL)-a evolves in Gulf Stream (GS) warm-core rings (WCRs) and cold-core rings (CCRs) using multi-platform satellite observations. Averaged CHL anomaly (CHLA) within the rings exhibits both positive and negative linear trends during the evolution of the WCRs while negative trends dominate in CCRs. This difference is associated with a variety of physical processes occurring during the evolution process. Meanwhile, eddy-centric analysis reveals four spatial patterns of CHLA long-term trends, some of which highlights the importance of rings in shaping surface CHL. Short-term fluctuations of CHLA in WCRs and CCRs are closely correlated with mixed layer depth and sea surface temperature anomaly and highlight the complex interplay between multiple mechanisms. In addition, we find higher concentration CHL in some WCRs than that in CCRs during the same season, providing an alternative view of the characteristics of the surface ecosystem in Gulf Stream rings.
Description:
This work was supported by the National Science Foundation Ocean Science Division under grant OCE-1558960. JN was supported by the Fundamental Research Funds for the Central Universities (Hohai University) under grant B200203005 and the China Scholarship Council.
Description:
2021-08-16
Keywords:
Gulf Stream rings
;
Mesoscale eddy
;
Physical-biological interaction
;
Satellite observations
;
Surface chlorophyll
Repository Name:
Woods Hole Open Access Server
Type:
Article
