The role of local-ice meltwater in the triggering of an under-ice phytoplankton bloom in an Arctic fjord
We combined records from moorings, profilers, and CTD transects obtained in an Arctic fjord (Young Sound, Greenland) to assess the effects of local meltwater input at the beginning of ice melt while the fjord was still covered by ice. Results indicate that light penetrated below the ice and was avai...
Published in: | Frontiers in Marine Science |
---|---|
Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2024
|
Subjects: | |
Online Access: | https://pure.au.dk/portal/en/publications/37c433e2-13c9-49cf-9a46-2d991493a092 https://doi.org/10.3389/fmars.2024.1291187 http://www.scopus.com/inward/record.url?scp=85185285800&partnerID=8YFLogxK |
id |
ftuniaarhuspubl:oai:pure.atira.dk:publications/37c433e2-13c9-49cf-9a46-2d991493a092 |
---|---|
record_format |
openpolar |
spelling |
ftuniaarhuspubl:oai:pure.atira.dk:publications/37c433e2-13c9-49cf-9a46-2d991493a092 2024-06-23T07:48:34+00:00 The role of local-ice meltwater in the triggering of an under-ice phytoplankton bloom in an Arctic fjord Ruiz-Castillo, Eugenio Verdugo, Josefa Kirillov, Sergei Dmitrenko, Igor Boone, Wieter Rysgaard, Søren 2024-01 https://pure.au.dk/portal/en/publications/37c433e2-13c9-49cf-9a46-2d991493a092 https://doi.org/10.3389/fmars.2024.1291187 http://www.scopus.com/inward/record.url?scp=85185285800&partnerID=8YFLogxK eng eng https://pure.au.dk/portal/en/publications/37c433e2-13c9-49cf-9a46-2d991493a092 info:eu-repo/semantics/openAccess Ruiz-Castillo , E , Verdugo , J , Kirillov , S , Dmitrenko , I , Boone , W & Rysgaard , S 2024 , ' The role of local-ice meltwater in the triggering of an under-ice phytoplankton bloom in an Arctic fjord ' , Frontiers in Marine Science , vol. 11 , 1291187 . https://doi.org/10.3389/fmars.2024.1291187 Arctic fjord meltwater input stratification under-ice phytoplankton bloom Young Sound-Greenland article 2024 ftuniaarhuspubl https://doi.org/10.3389/fmars.2024.1291187 2024-06-04T14:45:19Z We combined records from moorings, profilers, and CTD transects obtained in an Arctic fjord (Young Sound, Greenland) to assess the effects of local meltwater input at the beginning of ice melt while the fjord was still covered by ice. Results indicate that light penetrated below the ice and was available throughout the sampling period. Melting began at the mouth, where the ice and snow layers were thinner. At the mouth, meltwater triggered stratification and the onset of an under-ice phytoplankton bloom, as shown by an increase in chlorophyll-a (chl-a), fluorescence-CDOM, and oxygen saturation. Chl-a was highly correlated with salinity (−0.84) and temperature (0.88), indicating a strong association with the input of meltwater, while the maximums in chl-a and oxygen matched the distribution of the meltwater. At the mouth, in the area where the meltwater occurred, average chl-a increased from 0.27 mg m −3 to 0.40 mg m −3 , and by the end of the record, it was three times greater than the surrounding waters. In the area of the patch of meltwater on 26–28 May, averaged oxygen increased by 4%–5% during the sampling period. Inside the fjord, patches of meltwater occurred and were advected from the mouth by an in-fjord flow. Within these patches of meltwater, chl-a and oxygen saturation increased, and by the end of the record, they were two times and 5% higher than the surrounding waters, respectively. This study shows that meltwater and stratification were more important than light for the onset of the under-ice bloom and suggests a significant portion of pelagic primary productivity occurs before ice breakup. Article in Journal/Newspaper Arctic Arctic Greenland Phytoplankton Aarhus University: Research Arctic Greenland Frontiers in Marine Science 11 |
institution |
Open Polar |
collection |
Aarhus University: Research |
op_collection_id |
ftuniaarhuspubl |
language |
English |
topic |
Arctic fjord meltwater input stratification under-ice phytoplankton bloom Young Sound-Greenland |
spellingShingle |
Arctic fjord meltwater input stratification under-ice phytoplankton bloom Young Sound-Greenland Ruiz-Castillo, Eugenio Verdugo, Josefa Kirillov, Sergei Dmitrenko, Igor Boone, Wieter Rysgaard, Søren The role of local-ice meltwater in the triggering of an under-ice phytoplankton bloom in an Arctic fjord |
topic_facet |
Arctic fjord meltwater input stratification under-ice phytoplankton bloom Young Sound-Greenland |
description |
We combined records from moorings, profilers, and CTD transects obtained in an Arctic fjord (Young Sound, Greenland) to assess the effects of local meltwater input at the beginning of ice melt while the fjord was still covered by ice. Results indicate that light penetrated below the ice and was available throughout the sampling period. Melting began at the mouth, where the ice and snow layers were thinner. At the mouth, meltwater triggered stratification and the onset of an under-ice phytoplankton bloom, as shown by an increase in chlorophyll-a (chl-a), fluorescence-CDOM, and oxygen saturation. Chl-a was highly correlated with salinity (−0.84) and temperature (0.88), indicating a strong association with the input of meltwater, while the maximums in chl-a and oxygen matched the distribution of the meltwater. At the mouth, in the area where the meltwater occurred, average chl-a increased from 0.27 mg m −3 to 0.40 mg m −3 , and by the end of the record, it was three times greater than the surrounding waters. In the area of the patch of meltwater on 26–28 May, averaged oxygen increased by 4%–5% during the sampling period. Inside the fjord, patches of meltwater occurred and were advected from the mouth by an in-fjord flow. Within these patches of meltwater, chl-a and oxygen saturation increased, and by the end of the record, they were two times and 5% higher than the surrounding waters, respectively. This study shows that meltwater and stratification were more important than light for the onset of the under-ice bloom and suggests a significant portion of pelagic primary productivity occurs before ice breakup. |
format |
Article in Journal/Newspaper |
author |
Ruiz-Castillo, Eugenio Verdugo, Josefa Kirillov, Sergei Dmitrenko, Igor Boone, Wieter Rysgaard, Søren |
author_facet |
Ruiz-Castillo, Eugenio Verdugo, Josefa Kirillov, Sergei Dmitrenko, Igor Boone, Wieter Rysgaard, Søren |
author_sort |
Ruiz-Castillo, Eugenio |
title |
The role of local-ice meltwater in the triggering of an under-ice phytoplankton bloom in an Arctic fjord |
title_short |
The role of local-ice meltwater in the triggering of an under-ice phytoplankton bloom in an Arctic fjord |
title_full |
The role of local-ice meltwater in the triggering of an under-ice phytoplankton bloom in an Arctic fjord |
title_fullStr |
The role of local-ice meltwater in the triggering of an under-ice phytoplankton bloom in an Arctic fjord |
title_full_unstemmed |
The role of local-ice meltwater in the triggering of an under-ice phytoplankton bloom in an Arctic fjord |
title_sort |
role of local-ice meltwater in the triggering of an under-ice phytoplankton bloom in an arctic fjord |
publishDate |
2024 |
url |
https://pure.au.dk/portal/en/publications/37c433e2-13c9-49cf-9a46-2d991493a092 https://doi.org/10.3389/fmars.2024.1291187 http://www.scopus.com/inward/record.url?scp=85185285800&partnerID=8YFLogxK |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Arctic Greenland Phytoplankton |
genre_facet |
Arctic Arctic Greenland Phytoplankton |
op_source |
Ruiz-Castillo , E , Verdugo , J , Kirillov , S , Dmitrenko , I , Boone , W & Rysgaard , S 2024 , ' The role of local-ice meltwater in the triggering of an under-ice phytoplankton bloom in an Arctic fjord ' , Frontiers in Marine Science , vol. 11 , 1291187 . https://doi.org/10.3389/fmars.2024.1291187 |
op_relation |
https://pure.au.dk/portal/en/publications/37c433e2-13c9-49cf-9a46-2d991493a092 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3389/fmars.2024.1291187 |
container_title |
Frontiers in Marine Science |
container_volume |
11 |
_version_ |
1802638932547993600 |