Increasing cloudiness in Arctic damps the increase in phytoplankton primary production due to sea ice receding
The Arctic Ocean and its marginal seas are among the marine regions most affected by climate change. Here we present the results of a diagnostic model used to assess the primary production (PP) trends over the 1998–2010 period at pan-Arctic, regional and local (i.e. 9.28 km resolution) scales. Photo...
Published in: | Biogeosciences |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2013
|
Subjects: | |
Online Access: | https://doi.org/10.5194/bg-10-4087-2013 https://doaj.org/article/bb7a3e8efbc0479291fca2b05d6b1a11 |
id |
ftdoajarticles:oai:doaj.org/article:bb7a3e8efbc0479291fca2b05d6b1a11 |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:bb7a3e8efbc0479291fca2b05d6b1a11 2023-05-15T14:33:07+02:00 Increasing cloudiness in Arctic damps the increase in phytoplankton primary production due to sea ice receding S. Bélanger M. Babin J.-É. Tremblay 2013-06-01T00:00:00Z https://doi.org/10.5194/bg-10-4087-2013 https://doaj.org/article/bb7a3e8efbc0479291fca2b05d6b1a11 EN eng Copernicus Publications http://www.biogeosciences.net/10/4087/2013/bg-10-4087-2013.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 doi:10.5194/bg-10-4087-2013 1726-4170 1726-4189 https://doaj.org/article/bb7a3e8efbc0479291fca2b05d6b1a11 Biogeosciences, Vol 10, Iss 6, Pp 4087-4101 (2013) Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 article 2013 ftdoajarticles https://doi.org/10.5194/bg-10-4087-2013 2022-12-31T01:32:38Z The Arctic Ocean and its marginal seas are among the marine regions most affected by climate change. Here we present the results of a diagnostic model used to assess the primary production (PP) trends over the 1998–2010 period at pan-Arctic, regional and local (i.e. 9.28 km resolution) scales. Photosynthetically active radiation (PAR) above and below the sea surface was estimated using precomputed look-up tables of spectral irradiance, taking as input satellite-derived cloud optical thickness and cloud fraction parameters from the International Satellite Cloud Climatology Project (ISCCP) and sea ice concentration from passive microwaves data. A spectrally resolved PP model, designed for optically complex waters, was then used to assess the PP trends at high spatial resolution. Results show that PP is rising at a rate of +2.8 TgC yr −1 (or +14% decade −1 ) in the circum-Arctic and +5.1 TgC yr −1 when sub-Arctic seas are considered. In contrast, incident PAR above the sea surface (PAR(0+)) has significantly decreased over the whole Arctic and sub-Arctic Seas, except over the perennially sea-ice covered waters of the Central Arctic Ocean. This fading of PAR(0+) (−8% decade −1 ) was caused by increasing cloudiness during summer. Meanwhile, PAR penetrating the ocean (PAR(0−)) increased only along the sea ice margin over the large Arctic continental shelf where sea ice concentration declined sharply since 1998. Overall, PAR(0−) slightly increased in the circum-Arctic (+3.4% decade −1 ), while it decreased when considering both Arctic and sub-Arctic Seas (−3% decade −1 ). We showed that rising phytoplankton biomass (i.e. chlorophyll a ) normalized by the diffuse attenuation of photosynthetically usable radiation (PUR), accounted for a larger proportion of the rise in PP than did the increase in light availability due to sea-ice loss in several sectors, and particularly in perennially and seasonally open waters. Against a general backdrop of rising productivity over Arctic shelves, significant negative PP trends and the ... Article in Journal/Newspaper Arctic Arctic Ocean Climate change Phytoplankton Sea ice ice covered waters Directory of Open Access Journals: DOAJ Articles Arctic Arctic Ocean Biogeosciences 10 6 4087 4101 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
spellingShingle |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 S. Bélanger M. Babin J.-É. Tremblay Increasing cloudiness in Arctic damps the increase in phytoplankton primary production due to sea ice receding |
topic_facet |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
description |
The Arctic Ocean and its marginal seas are among the marine regions most affected by climate change. Here we present the results of a diagnostic model used to assess the primary production (PP) trends over the 1998–2010 period at pan-Arctic, regional and local (i.e. 9.28 km resolution) scales. Photosynthetically active radiation (PAR) above and below the sea surface was estimated using precomputed look-up tables of spectral irradiance, taking as input satellite-derived cloud optical thickness and cloud fraction parameters from the International Satellite Cloud Climatology Project (ISCCP) and sea ice concentration from passive microwaves data. A spectrally resolved PP model, designed for optically complex waters, was then used to assess the PP trends at high spatial resolution. Results show that PP is rising at a rate of +2.8 TgC yr −1 (or +14% decade −1 ) in the circum-Arctic and +5.1 TgC yr −1 when sub-Arctic seas are considered. In contrast, incident PAR above the sea surface (PAR(0+)) has significantly decreased over the whole Arctic and sub-Arctic Seas, except over the perennially sea-ice covered waters of the Central Arctic Ocean. This fading of PAR(0+) (−8% decade −1 ) was caused by increasing cloudiness during summer. Meanwhile, PAR penetrating the ocean (PAR(0−)) increased only along the sea ice margin over the large Arctic continental shelf where sea ice concentration declined sharply since 1998. Overall, PAR(0−) slightly increased in the circum-Arctic (+3.4% decade −1 ), while it decreased when considering both Arctic and sub-Arctic Seas (−3% decade −1 ). We showed that rising phytoplankton biomass (i.e. chlorophyll a ) normalized by the diffuse attenuation of photosynthetically usable radiation (PUR), accounted for a larger proportion of the rise in PP than did the increase in light availability due to sea-ice loss in several sectors, and particularly in perennially and seasonally open waters. Against a general backdrop of rising productivity over Arctic shelves, significant negative PP trends and the ... |
format |
Article in Journal/Newspaper |
author |
S. Bélanger M. Babin J.-É. Tremblay |
author_facet |
S. Bélanger M. Babin J.-É. Tremblay |
author_sort |
S. Bélanger |
title |
Increasing cloudiness in Arctic damps the increase in phytoplankton primary production due to sea ice receding |
title_short |
Increasing cloudiness in Arctic damps the increase in phytoplankton primary production due to sea ice receding |
title_full |
Increasing cloudiness in Arctic damps the increase in phytoplankton primary production due to sea ice receding |
title_fullStr |
Increasing cloudiness in Arctic damps the increase in phytoplankton primary production due to sea ice receding |
title_full_unstemmed |
Increasing cloudiness in Arctic damps the increase in phytoplankton primary production due to sea ice receding |
title_sort |
increasing cloudiness in arctic damps the increase in phytoplankton primary production due to sea ice receding |
publisher |
Copernicus Publications |
publishDate |
2013 |
url |
https://doi.org/10.5194/bg-10-4087-2013 https://doaj.org/article/bb7a3e8efbc0479291fca2b05d6b1a11 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean Climate change Phytoplankton Sea ice ice covered waters |
genre_facet |
Arctic Arctic Ocean Climate change Phytoplankton Sea ice ice covered waters |
op_source |
Biogeosciences, Vol 10, Iss 6, Pp 4087-4101 (2013) |
op_relation |
http://www.biogeosciences.net/10/4087/2013/bg-10-4087-2013.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 doi:10.5194/bg-10-4087-2013 1726-4170 1726-4189 https://doaj.org/article/bb7a3e8efbc0479291fca2b05d6b1a11 |
op_doi |
https://doi.org/10.5194/bg-10-4087-2013 |
container_title |
Biogeosciences |
container_volume |
10 |
container_issue |
6 |
container_start_page |
4087 |
op_container_end_page |
4101 |
_version_ |
1766306405971656704 |