Wintertime controls on summer stratification and productivity at the western Antarctic Peninsula
We report results collected year‐round since 1998 in northern Marguerite Bay, just inside the Antarctic Circle. The magnitude of the spring phytoplankton bloom is much reduced following winters with reduced sea‐ice cover. In years with little winter sea‐ice the exposed sea surface leads to deep mixe...
Published in: | Limnology and Oceanography |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
2013
|
Subjects: | |
Online Access: | http://dx.doi.org/10.4319/lo.2013.58.3.1035 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.2013.58.3.1035 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.2013.58.3.1035 |
id |
crwiley:10.4319/lo.2013.58.3.1035 |
---|---|
record_format |
openpolar |
spelling |
crwiley:10.4319/lo.2013.58.3.1035 2024-09-15T17:40:58+00:00 Wintertime controls on summer stratification and productivity at the western Antarctic Peninsula Venables, Hugh J. Clarke, Andrew Meredith, Michael P. 2013 http://dx.doi.org/10.4319/lo.2013.58.3.1035 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.2013.58.3.1035 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.2013.58.3.1035 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Limnology and Oceanography volume 58, issue 3, page 1035-1047 ISSN 0024-3590 1939-5590 journal-article 2013 crwiley https://doi.org/10.4319/lo.2013.58.3.1035 2024-09-05T05:06:58Z We report results collected year‐round since 1998 in northern Marguerite Bay, just inside the Antarctic Circle. The magnitude of the spring phytoplankton bloom is much reduced following winters with reduced sea‐ice cover. In years with little winter sea‐ice the exposed sea surface leads to deep mixed layers in winter, and reduced water‐column stratification the following spring. Summer mixed‐layer depths are similar, however, so the change is not in overall light availability but toward a less stable water column with greater vertical mixing and increased variability in the light conditions experienced by phytoplankton. Macronutrient concentrations are replete at all times, but the increased vertical mixing likely reduces iron availability. The timing of bloom initiation is similar between heavy and light ice years, occurring soon after light returns in early spring, at a mixed‐layer averaged light level of < 1 mol photon m −2 d −1 . Ongoing regional climate change in the WAP area, and notably the ongoing loss of winter sea‐ice, is likely to drive a downward trend in the magnitude of phytoplankton blooms in this region of the Antarctic Peninsula. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Sea ice Wiley Online Library Limnology and Oceanography 58 3 1035 1047 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
We report results collected year‐round since 1998 in northern Marguerite Bay, just inside the Antarctic Circle. The magnitude of the spring phytoplankton bloom is much reduced following winters with reduced sea‐ice cover. In years with little winter sea‐ice the exposed sea surface leads to deep mixed layers in winter, and reduced water‐column stratification the following spring. Summer mixed‐layer depths are similar, however, so the change is not in overall light availability but toward a less stable water column with greater vertical mixing and increased variability in the light conditions experienced by phytoplankton. Macronutrient concentrations are replete at all times, but the increased vertical mixing likely reduces iron availability. The timing of bloom initiation is similar between heavy and light ice years, occurring soon after light returns in early spring, at a mixed‐layer averaged light level of < 1 mol photon m −2 d −1 . Ongoing regional climate change in the WAP area, and notably the ongoing loss of winter sea‐ice, is likely to drive a downward trend in the magnitude of phytoplankton blooms in this region of the Antarctic Peninsula. |
format |
Article in Journal/Newspaper |
author |
Venables, Hugh J. Clarke, Andrew Meredith, Michael P. |
spellingShingle |
Venables, Hugh J. Clarke, Andrew Meredith, Michael P. Wintertime controls on summer stratification and productivity at the western Antarctic Peninsula |
author_facet |
Venables, Hugh J. Clarke, Andrew Meredith, Michael P. |
author_sort |
Venables, Hugh J. |
title |
Wintertime controls on summer stratification and productivity at the western Antarctic Peninsula |
title_short |
Wintertime controls on summer stratification and productivity at the western Antarctic Peninsula |
title_full |
Wintertime controls on summer stratification and productivity at the western Antarctic Peninsula |
title_fullStr |
Wintertime controls on summer stratification and productivity at the western Antarctic Peninsula |
title_full_unstemmed |
Wintertime controls on summer stratification and productivity at the western Antarctic Peninsula |
title_sort |
wintertime controls on summer stratification and productivity at the western antarctic peninsula |
publisher |
Wiley |
publishDate |
2013 |
url |
http://dx.doi.org/10.4319/lo.2013.58.3.1035 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.2013.58.3.1035 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.2013.58.3.1035 |
genre |
Antarc* Antarctic Antarctic Peninsula Sea ice |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Sea ice |
op_source |
Limnology and Oceanography volume 58, issue 3, page 1035-1047 ISSN 0024-3590 1939-5590 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.4319/lo.2013.58.3.1035 |
container_title |
Limnology and Oceanography |
container_volume |
58 |
container_issue |
3 |
container_start_page |
1035 |
op_container_end_page |
1047 |
_version_ |
1810487017479340032 |