Short‐wave radiation and sea ice in Baffin Bay

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2007-12-01 DOI:10.3137/ao.450402

E. Dunlap, B. DeTracey, Charles C. L. Tang

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引用次数: 6

Abstract

Abstract The sensitivity of the annual cycle of ice cover in Baffin Bay to short‐wave radiation is investigated. The Princeton Ocean Model (POM) is used and is coupled with a multi‐category, dynamic‐thermodynamic sea‐ice model in which the surface energy balance governs the growth rates of ice of varying thickness. During spring and summer the short‐wave radiation flux dominates other surface heat fluxes and thus has the greatest effect on the ice melt. The sensitivity of model results to short‐wave radiation is tested using several, commonly used, shortwave parameterizations under climatological, as well as short‐term, atmospheric forcing. The focus of this paper is short‐term and annual variability. It is shown that simulated ice cover is sensitive to the short‐wave radiation formulation during the melting phase. For the Baffin Bay simulation, the differences in the resulting ice area and volume, integrated from May to November, can be as large as 45% and 70%, respectively. The parameterization of the effect of cloud cover on the short‐wave radiation can result in the sea‐ice area and volume changes reaching 20% and 30%, respectively. The variation of the cloud amount represents cloud data error, and has a relatively small effect (less then ±4%) on the simulated ice conditions. This is due to the fact that the effect of cloud cover on the short‐wave radiation flux is largely compensated for by its effect on the net near‐surface long‐wave radiation flux.

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短波辐射和巴芬湾的海冰

摘要研究了巴芬湾冰盖年周期对短波辐射的敏感性。使用了普林斯顿海洋模型(POM)，并与多类别、动态-热力学海冰模型相结合，其中表面能量平衡控制着不同厚度冰的生长速率。在春夏两季，短波辐射通量支配着其他地表热通量，因此对冰融化的影响最大。在气候强迫和短期大气强迫下，使用几种常用的短波参数化来测试模式结果对短波辐射的敏感性。本文的重点是短期和年度变率。结果表明，在融化阶段，模拟冰盖对短波辐射公式非常敏感。在巴芬湾模拟中，从5月到11月，得到的冰面积和体积的差异分别可达45%和70%。云覆盖对短波辐射影响的参数化可以使海冰面积和体积变化分别达到20%和30%。云量的变化代表了云数据的误差，对模拟冰况的影响相对较小(小于±4%)。这是由于云覆盖对短波辐射通量的影响在很大程度上被其对近地表净长波辐射通量的影响所补偿。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.