Black-carbon reduction of snow albedo
Black-carbon reduction of snow albedo
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DOI：
10.1038/nclimate1433
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发表时间：
2012-06-01
影响因子：
30.7
通讯作者：
Kirchstetter, Thomas W.
中科院分区：
文献类型：
--
作者：
Hadley, Odelle L.;Kirchstetter, Thomas W.
气候模型表明，雪中的黑碳污染导致的地表温度降低导致全球变暖和几乎全世界的冰融化（1，2）。在这项研究中，我们在实验室中生成并表征了纯的和黑碳负载的雪，并验证了黑碳污染在自然环境中发现的水平上明显降低了雪的可吸收性（1，3，4）。在我们的实验中，增加雪粒的大小减少了雪的反射，放大了黑碳的辐射扰动，这证明了气候模型中包含的与衰老相关的正反馈。此外，我们的数据为雪、冰和气溶胶辐射模型提供了广泛的验证（1），该模型将被纳入政府间气候变化专门委员会的下一次评估（5）。
Climate models indicate that the reduction of surface albedo caused by black-carbon contamination of snow contributes to global warming and near-worldwide melting of ice(1,2). In this study, we generated and characterized pure and black-carbon-laden snow in the laboratory and verified that black-carbon contamination appreciably reduces snow albedo at levels that have been found in natural settingsa(1,3,4). Increasing the size of snow grains in our experiments decreased snow albedo and amplified the radiative perturbation of black carbon, which justifies the aging-related positive feedbacks that are included in climate models. Moreover, our data provide an extensive verification of the Snow, Ice and Aerosol Radiation model(1), which will be included in the next assessment of the Intergovernmental Panel on Climate Change(5).