| DOI: | 10.1002/grl.50178
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| 论文题名: | Glacier tongue calving reduced dense water formation and enhanced carbon uptake |
| 作者: | Shadwick E.H.; Rintoul S.R.; Tilbrook B.; Williams G.D.; Young N.; Fraser A.D.; Marchant H.; Smith J.; Tamura T.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9260
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| EISSN: | 1944-8991
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| 出版年: | 2013
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| 卷: | 40, 期:5 | | 起始页码: | 904
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| 结束页码: | 909
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| 语种: | 英语
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| 英文关键词: | carbon uptake
; dense water formation
; glacier calving
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| Scopus关键词: | Biological productivity
; Carbon uptake
; Carbonate saturations
; Dense shelf water
; Dense waters
; Overturning circulation
; Regional distribution
; Sea ice formations
; Carbon
; Stream flow
; Water levels
; Sea ice
; carbon
; carbonate
; circulation
; dense water
; dilution
; glacier
; meltwater
; nutrient availability
; nutrient uptake
; overturn
; salinity
; sea ice
; Antarctica
; East Antarctica
; Mertz Glacier
; Pacific Ocean
; Bacillariophyta
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| 英文摘要: | Dense shelf water formed in the Mertz Polynya supplies the lower limb of the global overturning circulation, ventilating the abyssal Indian and Pacific Oceans. Calving of the Mertz Glacier Tongue (MGT) in February 2010 altered the regional distribution of ice and reduced the size and activity of the polynya. The salinity and density of dense shelf water declined abruptly after calving, consistent with a reduction of sea ice formation in the polynya. Breakout and melt of thick multiyear sea ice released by the movement of iceberg B9B and the MGT freshened near-surface waters. The input of meltwater likely enhanced the availability of light and iron, supporting a diatom bloom that doubled carbon uptake relative to precalving conditions. The enhanced biological carbon drawdown increased the carbonate saturation state, outweighing dilution by meltwater input. These observations highlight the sensitivity of dense water formation, biological productivity, and carbon export to changes in the Antarctic icescape. © 2013. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84876791728&doi=10.1002%2fgrl.50178&partnerID=40&md5=db3758856462649e911c1790d6b84f93
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| Citation statistics: |
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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/6524
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| Appears in Collections: | 气候减缓与适应
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作者单位: | Antarctic Climate and Ecosystems Cooperative Research Centre, University of Tasmania, Hobart, TAS, Australia
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| Recommended Citation: | |
Shadwick E.H.,Rintoul S.R.,Tilbrook B.,et al. Glacier tongue calving reduced dense water formation and enhanced carbon uptake[J]. Geophysical Research Letters,2013-01-01,40(5).
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