| DOI: | 10.5194/tc-14-1385-2020
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| 论文题名: | Satellite observations of unprecedented phytoplankton blooms in the Maud Rise polynya, Southern Ocean |
| 作者: | Jena B.; N. Pillai A.
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| 刊名: | Cryosphere
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| ISSN: | 19940416
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| 出版年: | 2020
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| 卷: | 14, 期:4 | | 起始页码: | 1385
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| 结束页码: | 1398
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| 语种: | 英语
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| 英文关键词: | algal bloom
; algorithm
; carbon fixation
; Ekman layer
; Ekman pumping
; MODIS
; net primary production
; phytoplankton
; polynya
; satellite data
; sea ice
; wind stress
; Maud Rise
; Southern Ocean
; Weddell Sea
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| 英文摘要: | The appearance of phytoplankton blooms within sea ice cover is of high importance considering the upper ocean primary production that controls the biological pump, with implications for atmospheric CO2 and global climate. Satellite-derived chlorophyll a concentration showed unprecedented phytoplankton blooms in the Maud Rise polynya, Southern Ocean, with chlorophyll a reaching up to 4.67 mg m -3 during 2017. Multi-satellite data indicated that the bloom appeared for the first time since the entire mission records started in 1978. An Argo float located in the polynya edge provided evidence of bloom conditions in austral spring 2017 (chlorophyll a up to 5.47 mg m -3) compared to the preceding years with prevailing low chlorophyll a. The occurrence of bloom was associated with the supply of nutrients into the upper ocean through Ekman upwelling (driven by wind stress curl and cyclonic ocean eddies) and improved light conditions of up to 61.9 einstein m -2 d -1. The net primary production from the Aqua Moderate Resolution Imaging Spectroradiometer chlorophyll-based algorithm showed that the Maud Rise polynya was as productive as the Antarctic coastal polynyas, with carbon fixation rates reaching up to 415.08 mg C m -2 d -1. The study demonstrates how the phytoplankton in the Southern Ocean (specifically over the shallow bathymetric region) would likely respond in the future under warming climate conditions and continued melting of Antarctic sea ice. © 2019 BioMed Central Ltd.. All rights reserved. |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/164492
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| Appears in Collections: | 气候变化与战略
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作者单位: | ESSO - National Centre for Polar and Ocean Research, Ministry of Earth Sciences, Government of India, Vasco da Gama, India
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| Recommended Citation: | |
Jena B.,N. Pillai A.. Satellite observations of unprecedented phytoplankton blooms in the Maud Rise polynya, Southern Ocean[J]. Cryosphere,2020-01-01,14(4)
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