Seasonal variation in the correlation between anomalies of sea level and chlorophyll in the Antarctic Circumpolar Current
Author Posting. © American Geophysical Union, 2018. 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 45 (2018): 5011-5019, doi:10.1029/2017GL076246. The Antarctic Cir...
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ftwhoas:oai:darchive.mblwhoilibrary.org:1912/10447 2023-05-15T13:48:31+02:00 Seasonal variation in the correlation between anomalies of sea level and chlorophyll in the Antarctic Circumpolar Current Song, Hajoon Long, Matthew C. Gaube, Peter Frenger, Ivy Marshall, John McGillicuddy, Dennis J. 2018-05-30 https://hdl.handle.net/1912/10447 en_US eng John Wiley & Sons https://doi.org/10.1029/2017GL076246 Geophysical Research Letters 45 (2018): 5011-5019 https://hdl.handle.net/1912/10447 doi:10.1029/2017GL076246 Geophysical Research Letters 45 (2018): 5011-5019 doi:10.1029/2017GL076246 Mesoscale eddy Vertical mixing Chlorophyll Southern Ocean Iron Light Article 2018 ftwhoas https://doi.org/10.1029/2017GL076246 2022-05-28T23:00:25Z Author Posting. © American Geophysical Union, 2018. 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 45 (2018): 5011-5019, doi:10.1029/2017GL076246. The Antarctic Circumpolar Current has highly energetic mesoscale phenomena, but their impacts on phytoplankton biomass, productivity, and biogeochemical cycling are not understood well. We analyze satellite observations and an eddy‐rich ocean model to show that they drive chlorophyll anomalies of opposite sign in winter versus summer. In winter, deeper mixed layers in positive sea surface height (SSH) anomalies reduce light availability, leading to anomalously low chlorophyll concentrations. In summer with abundant light, however, positive SSH anomalies show elevated chlorophyll concentration due to higher iron level, and an iron budget analysis reveals that anomalously strong vertical mixing enhances iron supply to the mixed layer. Features with negative SSH anomalies exhibit the opposite tendencies: higher chlorophyll concentration in winter and lower in summer. Our results suggest that mesoscale modulation of iron supply, light availability, and vertical mixing plays an important role in causing systematic variations in primary productivity over the seasonal cycle. 2018-11-17 Article in Journal/Newspaper Antarc* Antarctic Southern Ocean Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Antarctic Southern Ocean The Antarctic Geophysical Research Letters 45 10 5011 5019 |
institution |
Open Polar |
collection |
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
op_collection_id |
ftwhoas |
language |
English |
topic |
Mesoscale eddy Vertical mixing Chlorophyll Southern Ocean Iron Light |
spellingShingle |
Mesoscale eddy Vertical mixing Chlorophyll Southern Ocean Iron Light Song, Hajoon Long, Matthew C. Gaube, Peter Frenger, Ivy Marshall, John McGillicuddy, Dennis J. Seasonal variation in the correlation between anomalies of sea level and chlorophyll in the Antarctic Circumpolar Current |
topic_facet |
Mesoscale eddy Vertical mixing Chlorophyll Southern Ocean Iron Light |
description |
Author Posting. © American Geophysical Union, 2018. 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 45 (2018): 5011-5019, doi:10.1029/2017GL076246. The Antarctic Circumpolar Current has highly energetic mesoscale phenomena, but their impacts on phytoplankton biomass, productivity, and biogeochemical cycling are not understood well. We analyze satellite observations and an eddy‐rich ocean model to show that they drive chlorophyll anomalies of opposite sign in winter versus summer. In winter, deeper mixed layers in positive sea surface height (SSH) anomalies reduce light availability, leading to anomalously low chlorophyll concentrations. In summer with abundant light, however, positive SSH anomalies show elevated chlorophyll concentration due to higher iron level, and an iron budget analysis reveals that anomalously strong vertical mixing enhances iron supply to the mixed layer. Features with negative SSH anomalies exhibit the opposite tendencies: higher chlorophyll concentration in winter and lower in summer. Our results suggest that mesoscale modulation of iron supply, light availability, and vertical mixing plays an important role in causing systematic variations in primary productivity over the seasonal cycle. 2018-11-17 |
format |
Article in Journal/Newspaper |
author |
Song, Hajoon Long, Matthew C. Gaube, Peter Frenger, Ivy Marshall, John McGillicuddy, Dennis J. |
author_facet |
Song, Hajoon Long, Matthew C. Gaube, Peter Frenger, Ivy Marshall, John McGillicuddy, Dennis J. |
author_sort |
Song, Hajoon |
title |
Seasonal variation in the correlation between anomalies of sea level and chlorophyll in the Antarctic Circumpolar Current |
title_short |
Seasonal variation in the correlation between anomalies of sea level and chlorophyll in the Antarctic Circumpolar Current |
title_full |
Seasonal variation in the correlation between anomalies of sea level and chlorophyll in the Antarctic Circumpolar Current |
title_fullStr |
Seasonal variation in the correlation between anomalies of sea level and chlorophyll in the Antarctic Circumpolar Current |
title_full_unstemmed |
Seasonal variation in the correlation between anomalies of sea level and chlorophyll in the Antarctic Circumpolar Current |
title_sort |
seasonal variation in the correlation between anomalies of sea level and chlorophyll in the antarctic circumpolar current |
publisher |
John Wiley & Sons |
publishDate |
2018 |
url |
https://hdl.handle.net/1912/10447 |
geographic |
Antarctic Southern Ocean The Antarctic |
geographic_facet |
Antarctic Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_source |
Geophysical Research Letters 45 (2018): 5011-5019 doi:10.1029/2017GL076246 |
op_relation |
https://doi.org/10.1029/2017GL076246 Geophysical Research Letters 45 (2018): 5011-5019 https://hdl.handle.net/1912/10447 doi:10.1029/2017GL076246 |
op_doi |
https://doi.org/10.1029/2017GL076246 |
container_title |
Geophysical Research Letters |
container_volume |
45 |
container_issue |
10 |
container_start_page |
5011 |
op_container_end_page |
5019 |
_version_ |
1766249349913772032 |