A reassessment of the integrated impact of tropical cyclones on surface chlorophyll in the western subtropical North Atlantic

Foltz, Gregory R.; Balaguru, Karthik; Leung, L. Ruby

doi:10.1002/2015GL063222

A reassessment of the integrated impact of tropical cyclones on surface chlorophyll in the western subtropical North Atlantic

Journal Article · Fri Feb 27 00:00:00 EST 2015 · Geophysical Research Letters

DOI:https://doi.org/10.1002/2015GL063222· OSTI ID:1402369

Foltz, Gregory R. ^[1]; Balaguru, Karthik ^[2]; Leung, L. Ruby ^[3]

Atlantic Oceanographic and Meteorological Laboratory NOAA Miami Florida USA
Marine Sciences Laboratory Pacific Northwest National Laboratory Seattle Washington USA
Atmospheric Sciences and Global Change Division Pacific Northwest National Laboratory Richland Washington USA

Abstract

The impact of tropical cyclones on surface chlorophyll concentration is assessed in the western subtropical North Atlantic Ocean during 1998–2011. Previous studies in this area focused on individual cyclones and gave mixed results regarding the importance of tropical cyclone‐induced mixing for changes in surface chlorophyll. Using a more integrated and comprehensive approach that includes quantification of cyclone‐induced changes in mixed layer depth, here it is shown that accumulated cyclone energy explains 22% of the interannual variability in seasonally averaged (June–November) chlorophyll concentration in the western subtropical North Atlantic, after removing the influence of the North Atlantic Oscillation (NAO). The variance explained by tropical cyclones is thus about 70% of that explained by the NAO, which has well‐known impacts in this region. It is therefore likely that tropical cyclones contribute significantly to interannual variations of primary productivity in the western subtropical North Atlantic during the hurricane season.

View Accepted Manuscript (Publisher)

Sponsoring Organization:: USDOE

OSTI ID:: 1402369

Alternate ID(s):: OSTI ID: 1182875

Journal Information:: Geophysical Research Letters, Journal Name: Geophysical Research Letters Journal Issue: 4 Vol. 42; ISSN 0094-8276

Publisher:: American Geophysical Union (AGU)Copyright Statement

Country of Publication:: United States

Language:: English

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