Impacts of Shifting Subtropical Highs on the California Current and Canary Current Systems

Schmidt, Daniel F.; Amaya, Dillon J.; Grise, Kevin M.; Miller, Arthur J.

doi:10.1029/2020GL088996

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Impacts of Shifting Subtropical Highs on the California Current and Canary Current Systems

2020
By Schmidt, Daniel F. ; Amaya, Dillon J. ; Grise, Kevin M. ; ...
Source: Geophysical Research Letters,47, e2020GL088996.

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Journal Title:

Geophysical Research Letters
Personal Author:

Schmidt, Daniel F. ; Amaya, Dillon J. ; Grise, Kevin M. ; Miller, Arthur J.

Schmidt, Daniel F. ; Amaya, Dillon J. ; Grise, Kevin M. ; Miller, Arthur J. Less -
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research) ; CPO (Climate Program Office)

OAR (Oceanic and Atmospheric Research) ; CPO (Climate Program Office) Less -
Description:

Upwelling in eastern boundary current regions is crucial to bringing nutrient-rich water to the photic zone and supporting the associated ecosystems. This upwelling is a result of the wind-driven ocean circulation and is therefore susceptible to changes in the atmospheric circulation. We use the Community Earth System Model and observational data to explore the response of upwelling in the California Current and Canary Current systems to shifts in the Northern Hemisphere subtropical high-pressure systems. We find that shifts in the North Pacific subtropical high explain a substantial fraction of both the short-term variability and projected trend in upwelling in the California Current system during boreal summer. By contrast, the Canary Current system is less affected by shifts of the North Atlantic subtropical high, mostly because the strongest wind anomalies associated with shifts of this high-pressure system occur too far north. We also find little impact from the Northern Hemisphere Hadley cell.
Keywords:

[+]

Anticyclones California Current Canary Current Climate-change Eastern Boundary Current Geology Hadley Cell Intensification Subtropical High
Source:

Geophysical Research Letters,47, e2020GL088996.
DOI:

https://doi.org/10.1029/2020GL088996
Document Type:

Journal Article
Funding:

Grant no. NA17OAR4310106
Place as Subject:

California
Rights Information:

Other
Compliance:

Submitted
Main Document Checksum:

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urn:sha256:6117edd227cce4a7f338da8ec163b9332536ecfe20a626afabf5d402c931f700
Download URL:

https://repository.library.noaa.gov/view/noaa/28693/noaa_28693_DS1.pdf
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[PDF-6.32 MB]

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