Effects of phytoplankton community composition and productivity on sea surface pCO(2) variations in the Southern Ocean
The Southern Ocean is a vast net sink for atmospheric carbon dioxide (CO2), with marine phytoplankton playing a crucial role in CO2 fixation. We assessed how changes in the dominant phytoplankton community and net primary productivity (NPP) affected variations in the partial pressure of CO2 in surfa...
Published in: | Deep Sea Research Part I: Oceanographic Research Papers |
---|---|
Main Authors: | , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Elsevier
|
Subjects: | |
Online Access: | http://hdl.handle.net/2115/78754 https://doi.org/10.1016/j.dsr.2020.103263 |
id |
fthokunivhus:oai:eprints.lib.hokudai.ac.jp:2115/78754 |
---|---|
record_format |
openpolar |
spelling |
fthokunivhus:oai:eprints.lib.hokudai.ac.jp:2115/78754 2023-05-15T13:51:33+02:00 Effects of phytoplankton community composition and productivity on sea surface pCO(2) variations in the Southern Ocean Takao, Shintaro Nakaoka, Shin-Ichiro Hashihama, Fuminori Shimada, Keishi Yoshikawa-Inoue, Hisayuki Hirawake, Toru Kanda, Jota Hashida, Gen Suzuki, Koji http://hdl.handle.net/2115/78754 https://doi.org/10.1016/j.dsr.2020.103263 eng eng Elsevier http://hdl.handle.net/2115/78754 Deep Sea Research Part I Oceanographic Research Papers, 160: 103263 http://dx.doi.org/10.1016/j.dsr.2020.103263 © 2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ http://creativecommons.org/licenses/by/4.0/ CC-BY-NC-ND CC-BY Phytoplankton community composition Diatoms Southern Ocean Net primary productivity Carbon dioxide 452 article fthokunivhus https://doi.org/10.1016/j.dsr.2020.103263 2022-11-18T01:06:02Z The Southern Ocean is a vast net sink for atmospheric carbon dioxide (CO2), with marine phytoplankton playing a crucial role in CO2 fixation. We assessed how changes in the dominant phytoplankton community and net primary productivity (NPP) affected variations in the partial pressure of CO2 in surface water (pCO(2)(sw)) in the Indian sector of the Southern Ocean during austral summer. pCO2sw was negatively correlated with total phytoplankton and diatom abundances, as estimated from pigment signatures, in the zone south of the Antarctic Circumpolar Current; however, pCO(2)(sw) was not correlated with haptophyte abundance. Additionally, a stronger correlation was found between pCO(2)(sw) and total phytoplankton NPP than between chlorophyll a concentration and pCO(2)(sw). We reconstructed pCO(2)(sw) at inter-annual scale using satellite data and assessed the inter-annual variability of air-sea CO2 flux. Over the period from 1997 to 2007, the integrated CO2 fluxes over the study region showed very large variations from a small source to a strong sink. Variations in the integrated CO2 fluxes were also correlated with changes in satellite-derived phytoplankton community in the Indian sector of the Southern Ocean and changes in the dominant phytoplankton community may control CO2 dynamics in the marginal ice zone. Article in Journal/Newspaper Antarc* Antarctic Southern Ocean Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) Antarctic Southern Ocean The Antarctic Austral Indian Deep Sea Research Part I: Oceanographic Research Papers 160 103263 |
institution |
Open Polar |
collection |
Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) |
op_collection_id |
fthokunivhus |
language |
English |
topic |
Phytoplankton community composition Diatoms Southern Ocean Net primary productivity Carbon dioxide 452 |
spellingShingle |
Phytoplankton community composition Diatoms Southern Ocean Net primary productivity Carbon dioxide 452 Takao, Shintaro Nakaoka, Shin-Ichiro Hashihama, Fuminori Shimada, Keishi Yoshikawa-Inoue, Hisayuki Hirawake, Toru Kanda, Jota Hashida, Gen Suzuki, Koji Effects of phytoplankton community composition and productivity on sea surface pCO(2) variations in the Southern Ocean |
topic_facet |
Phytoplankton community composition Diatoms Southern Ocean Net primary productivity Carbon dioxide 452 |
description |
The Southern Ocean is a vast net sink for atmospheric carbon dioxide (CO2), with marine phytoplankton playing a crucial role in CO2 fixation. We assessed how changes in the dominant phytoplankton community and net primary productivity (NPP) affected variations in the partial pressure of CO2 in surface water (pCO(2)(sw)) in the Indian sector of the Southern Ocean during austral summer. pCO2sw was negatively correlated with total phytoplankton and diatom abundances, as estimated from pigment signatures, in the zone south of the Antarctic Circumpolar Current; however, pCO(2)(sw) was not correlated with haptophyte abundance. Additionally, a stronger correlation was found between pCO(2)(sw) and total phytoplankton NPP than between chlorophyll a concentration and pCO(2)(sw). We reconstructed pCO(2)(sw) at inter-annual scale using satellite data and assessed the inter-annual variability of air-sea CO2 flux. Over the period from 1997 to 2007, the integrated CO2 fluxes over the study region showed very large variations from a small source to a strong sink. Variations in the integrated CO2 fluxes were also correlated with changes in satellite-derived phytoplankton community in the Indian sector of the Southern Ocean and changes in the dominant phytoplankton community may control CO2 dynamics in the marginal ice zone. |
format |
Article in Journal/Newspaper |
author |
Takao, Shintaro Nakaoka, Shin-Ichiro Hashihama, Fuminori Shimada, Keishi Yoshikawa-Inoue, Hisayuki Hirawake, Toru Kanda, Jota Hashida, Gen Suzuki, Koji |
author_facet |
Takao, Shintaro Nakaoka, Shin-Ichiro Hashihama, Fuminori Shimada, Keishi Yoshikawa-Inoue, Hisayuki Hirawake, Toru Kanda, Jota Hashida, Gen Suzuki, Koji |
author_sort |
Takao, Shintaro |
title |
Effects of phytoplankton community composition and productivity on sea surface pCO(2) variations in the Southern Ocean |
title_short |
Effects of phytoplankton community composition and productivity on sea surface pCO(2) variations in the Southern Ocean |
title_full |
Effects of phytoplankton community composition and productivity on sea surface pCO(2) variations in the Southern Ocean |
title_fullStr |
Effects of phytoplankton community composition and productivity on sea surface pCO(2) variations in the Southern Ocean |
title_full_unstemmed |
Effects of phytoplankton community composition and productivity on sea surface pCO(2) variations in the Southern Ocean |
title_sort |
effects of phytoplankton community composition and productivity on sea surface pco(2) variations in the southern ocean |
publisher |
Elsevier |
url |
http://hdl.handle.net/2115/78754 https://doi.org/10.1016/j.dsr.2020.103263 |
geographic |
Antarctic Southern Ocean The Antarctic Austral Indian |
geographic_facet |
Antarctic Southern Ocean The Antarctic Austral Indian |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_relation |
http://hdl.handle.net/2115/78754 Deep Sea Research Part I Oceanographic Research Papers, 160: 103263 http://dx.doi.org/10.1016/j.dsr.2020.103263 |
op_rights |
© 2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ http://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY-NC-ND CC-BY |
op_doi |
https://doi.org/10.1016/j.dsr.2020.103263 |
container_title |
Deep Sea Research Part I: Oceanographic Research Papers |
container_volume |
160 |
container_start_page |
103263 |
_version_ |
1766255454554423296 |