| DOI: | 10.1016/j.gloplacha.2014.11.013
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| 论文题名: | Arctic freshwater export: Status, mechanisms, and prospects |
| 作者: | Haine T.W.N.; Curry B.; Gerdes R.; Hansen E.; Karcher M.; Lee C.; Rudels B.; Spreen G.; de Steur L.; Stewart K.D.; Woodgate R.
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| 刊名: | Global and Planetary Change
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| ISSN: | 0921-8181
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| 出版年: | 2015
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| 卷: | 125 | | 起始页码: | 13
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| 结束页码: | 35
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| 语种: | 英语
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| 英文关键词: | Arctic Ocean
; Climate change
; Hydrological cycle
; Oceanography
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| 英文摘要: | Large freshwater anomalies clearly exist in the Arctic Ocean. For example, liquid freshwater has accumulated in the Beaufort Gyre in the decade of the 2000s compared to 1980-2000, with an extra ≈5000km3 - about 25% - being stored. The sources of freshwater to the Arctic from precipitation and runoff have increased between these periods (most of the evidence comes from models). Despite flux increases from 2001 to 2011, it is uncertain if the marine freshwater source through Bering Strait for the 2000s has changed, as observations in the 1980s and 1990s are incomplete. The marine freshwater fluxes draining the Arctic through Fram and Davis straits are also insignificantly different. In this way, the balance of sources and sinks of freshwater to the Arctic, Canadian Arctic Archipelago (CAA), and Baffin Bay shifted to about 1200±730km3yr-1 freshening the region, on average, during the 2000s. The observed accumulation of liquid freshwater is consistent with this increased supply and the loss of freshwater from sea ice. Coupled climate models project continued freshening of the Arctic during the 21st century, with a total gain of about 50,000km3 for the Arctic, CAA, and Baffin Bay (an increase of about 50%) by 2100. Understanding of the mechanisms controlling freshwater emphasizes the importance of Arctic surface winds, in addition to the sources of freshwater. The wind can modify the storage, release, and pathways of freshwater on timescales of O(1-10) months. Discharges of excess freshwater through Fram or Davis straits appear possible, triggered by changes in the wind, but are hard to predict. Continued measurement of the fluxes and storage of freshwater is needed to observe changes such as these. © 2013 Elsevier B.V. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84919935826&doi=10.1016%2fj.gloplacha.2014.11.013&partnerID=40&md5=f9050e0d3a4c485568cfd99527f7af96
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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/11564
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| Appears in Collections: | 全球变化的国际研究计划
气候变化与战略
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作者单位: | Earth and Planetary Sciences, The Johns Hopkins University, Baltimore, MD, United States
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| Recommended Citation: | |
Haine T.W.N.,Curry B.,Gerdes R.,et al. Arctic freshwater export: Status, mechanisms, and prospects[J]. Global and Planetary Change,2015-01-01,125.
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