Calving event led to changes in phytoplankton bloom phenology in the Mertz polynya, Antarctica
Polynyas are subject to variability in winds and ocean circulation and are important sites of ecological productivity. In February 2010, the B09B iceberg collided with the Mertz Glacier Tongue (MGT), calving a 78x40 km giant iceberg which modified the icescape and primary productivity of the Mertz P...
Published in: | Journal of Geophysical Research: Oceans |
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Online Access: | https://doi.org/10.1029/2020JC016387 http://ecite.utas.edu.au/141424 |
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ftunivtasecite:oai:ecite.utas.edu.au:141424 2023-05-15T13:42:40+02:00 Calving event led to changes in phytoplankton bloom phenology in the Mertz polynya, Antarctica Liniger, GG Strutton, PG Lannuzel, D Moreau, S 2020 application/pdf https://doi.org/10.1029/2020JC016387 http://ecite.utas.edu.au/141424 en eng Wiley-Blackwell Publishing Inc. http://ecite.utas.edu.au/141424/1/141424 - Calving event led to changes in phytoplankton bloom phenology_OA.pdf http://dx.doi.org/10.1029/2020JC016387 Liniger, GG and Strutton, PG and Lannuzel, D and Moreau, S, Calving event led to changes in phytoplankton bloom phenology in the Mertz polynya, Antarctica, Journal of Geophysical Research: Oceans, 125, (11) Article e2020JC016387. ISSN 2169-9275 (2020) [Refereed Article] http://ecite.utas.edu.au/141424 Earth Sciences Climate change science Climate change processes Refereed Article PeerReviewed 2020 ftunivtasecite https://doi.org/10.1029/2020JC016387 2022-08-29T22:18:09Z Polynyas are subject to variability in winds and ocean circulation and are important sites of ecological productivity. In February 2010, the B09B iceberg collided with the Mertz Glacier Tongue (MGT), calving a 78x40 km giant iceberg which modified the icescape and primary productivity of the Mertz Polynya. In this study, we use satellite ocean color and sea‐ice concentration to investigate the variability, trends and drivers of phytoplankton blooms in the Mertz polynya since 1997. During the bloom, over 21 years, we found: (i) a later ice retreat time, (ii) an increase in sea‐ice concentration, (iii) a decrease in open‐water period, (iv) a later bloom start and (v) a decrease in bloom duration. Our results suggest that major post‐calving changes in the physical characteristics of the polynya, mainly its icescape, are the primary drivers of phytoplankton phenology. More specifically, the MGT calving event resulted in significant seasonal and regional changes, with higher eastern chl‐ a and mean summer chl‐ a post‐calving. While satellite data are useful to study long‐term variability in these inhospitable areas, they only focus on the ocean surface and are obscured by ice and clouds. Additional sub‐surface parameters from seal tags, gliders and moorings in the southernmost polar regions would strengthen our comprehension of phytoplankton and physical changes in ocean dynamics that may have far‐reaching consequences, from global circulation to carbon export. Article in Journal/Newspaper Antarc* Antarctica Antarctica Journal Mertz Glacier Sea ice eCite UTAS (University of Tasmania) Mertz Glacier ENVELOPE(144.500,144.500,-67.667,-67.667) Mertz Glacier Tongue ENVELOPE(145.500,145.500,-67.167,-67.167) Journal of Geophysical Research: Oceans 125 11 |
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Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Earth Sciences Climate change science Climate change processes |
spellingShingle |
Earth Sciences Climate change science Climate change processes Liniger, GG Strutton, PG Lannuzel, D Moreau, S Calving event led to changes in phytoplankton bloom phenology in the Mertz polynya, Antarctica |
topic_facet |
Earth Sciences Climate change science Climate change processes |
description |
Polynyas are subject to variability in winds and ocean circulation and are important sites of ecological productivity. In February 2010, the B09B iceberg collided with the Mertz Glacier Tongue (MGT), calving a 78x40 km giant iceberg which modified the icescape and primary productivity of the Mertz Polynya. In this study, we use satellite ocean color and sea‐ice concentration to investigate the variability, trends and drivers of phytoplankton blooms in the Mertz polynya since 1997. During the bloom, over 21 years, we found: (i) a later ice retreat time, (ii) an increase in sea‐ice concentration, (iii) a decrease in open‐water period, (iv) a later bloom start and (v) a decrease in bloom duration. Our results suggest that major post‐calving changes in the physical characteristics of the polynya, mainly its icescape, are the primary drivers of phytoplankton phenology. More specifically, the MGT calving event resulted in significant seasonal and regional changes, with higher eastern chl‐ a and mean summer chl‐ a post‐calving. While satellite data are useful to study long‐term variability in these inhospitable areas, they only focus on the ocean surface and are obscured by ice and clouds. Additional sub‐surface parameters from seal tags, gliders and moorings in the southernmost polar regions would strengthen our comprehension of phytoplankton and physical changes in ocean dynamics that may have far‐reaching consequences, from global circulation to carbon export. |
format |
Article in Journal/Newspaper |
author |
Liniger, GG Strutton, PG Lannuzel, D Moreau, S |
author_facet |
Liniger, GG Strutton, PG Lannuzel, D Moreau, S |
author_sort |
Liniger, GG |
title |
Calving event led to changes in phytoplankton bloom phenology in the Mertz polynya, Antarctica |
title_short |
Calving event led to changes in phytoplankton bloom phenology in the Mertz polynya, Antarctica |
title_full |
Calving event led to changes in phytoplankton bloom phenology in the Mertz polynya, Antarctica |
title_fullStr |
Calving event led to changes in phytoplankton bloom phenology in the Mertz polynya, Antarctica |
title_full_unstemmed |
Calving event led to changes in phytoplankton bloom phenology in the Mertz polynya, Antarctica |
title_sort |
calving event led to changes in phytoplankton bloom phenology in the mertz polynya, antarctica |
publisher |
Wiley-Blackwell Publishing Inc. |
publishDate |
2020 |
url |
https://doi.org/10.1029/2020JC016387 http://ecite.utas.edu.au/141424 |
long_lat |
ENVELOPE(144.500,144.500,-67.667,-67.667) ENVELOPE(145.500,145.500,-67.167,-67.167) |
geographic |
Mertz Glacier Mertz Glacier Tongue |
geographic_facet |
Mertz Glacier Mertz Glacier Tongue |
genre |
Antarc* Antarctica Antarctica Journal Mertz Glacier Sea ice |
genre_facet |
Antarc* Antarctica Antarctica Journal Mertz Glacier Sea ice |
op_relation |
http://ecite.utas.edu.au/141424/1/141424 - Calving event led to changes in phytoplankton bloom phenology_OA.pdf http://dx.doi.org/10.1029/2020JC016387 Liniger, GG and Strutton, PG and Lannuzel, D and Moreau, S, Calving event led to changes in phytoplankton bloom phenology in the Mertz polynya, Antarctica, Journal of Geophysical Research: Oceans, 125, (11) Article e2020JC016387. ISSN 2169-9275 (2020) [Refereed Article] http://ecite.utas.edu.au/141424 |
op_doi |
https://doi.org/10.1029/2020JC016387 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
125 |
container_issue |
11 |
_version_ |
1766171174473039872 |