globalchange  > 影响、适应和脆弱性
DOI: 10.1088/1748-9326/10/4/044020
论文题名:
Impacts of ocean albedo alteration on Arctic sea ice restoration and Northern Hemisphere climate
作者: Ivana Cvijanovic; Ken Caldeira; Douglas G MacMartin
刊名: Environmental Research Letters
ISSN: 1748-9326
出版年: 2015
发表日期: 2015-04-28
卷: 10, 期:4
语种: 英语
英文摘要:

The Arctic Ocean is expected to transition into a seasonally ice-free state by mid-century, enhancing Arctic warming and leading to substantial ecological and socio-economic challenges across the Arctic region. It has been proposed that artificially increasing high latitude ocean albedo could restore sea ice, but the climate impacts of such a strategy have not been previously explored. Motivated by this, we investigate the impacts of idealized high latitude ocean albedo changes on Arctic sea ice restoration and climate. In our simulated 4xCO2 climate, imposing surface albedo alterations over the Arctic Ocean leads to partial sea ice recovery and a modest reduction in Arctic warming. With the most extreme ocean albedo changes, imposed over the area 70°–90°N, September sea ice cover stabilizes at ~40% of its preindustrial value (compared to ~3% without imposed albedo modifications). This is accompanied by an annual mean Arctic surface temperature decrease of ~2 °C but no substantial global mean temperature decrease. Imposed albedo changes and sea ice recovery alter climate outside the Arctic region too, affecting precipitation distribution over parts of the continental United States and Northeastern Pacific. For example, following sea ice recovery, wetter and milder winter conditions are present in the Southwest United States while the East Coast experiences cooling. We conclude that although ocean albedo alteration could lead to some sea ice recovery, it does not appear to be an effective way of offsetting the overall effects of CO2 induced global warming.

URL: http://iopscience.iop.org/article/10.1088/1748-9326/10/4/044020
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/14154
Appears in Collections:影响、适应和脆弱性
气候减缓与适应

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作者单位: Carnegie Institution for Science, Department of Global Ecology, 260 Panama St., Stanford, CA 94305, USA;Carnegie Institution for Science, Department of Global Ecology, 260 Panama St., Stanford, CA 94305, USA;California Institute of Technology, Department of Computing + Mathematical Sciences, 1200 E. California Blvd., Pasadena, CA 91125, USA

Recommended Citation:
Ivana Cvijanovic,Ken Caldeira,Douglas G MacMartin. Impacts of ocean albedo alteration on Arctic sea ice restoration and Northern Hemisphere climate[J]. Environmental Research Letters,2015-01-01,10(4)
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