The footprints of 16 year trends of Arctic springtime cloud and radiation properties on September sea ice retreat
The footprints of 16 year trends of Arctic springtime cloud and radiation properties on September sea ice retreat
复制标题
9月海冰退缩时北极春季云和辐射特性16年趋势的足迹
DOI：
10.1002/2016jd026020
复制
发表时间：
2017
期刊：
影响因子：
--
通讯作者：
R. Stanfield
中科院分区：
文献类型：
--
作者：
Yiyi Huang;Xiquan Dong;B. Xi;E. Dolinar;R. Stanfield
在2000-2015年期间，9月北极海冰最显著的下降发生在西伯利亚海，拉普捷夫海和喀拉海。利用卫星观测和反演的北极地区（70° ~ 90 ° N）海冰浓度（SIC）和云/辐射特征，研究了春季云和辐射特征对9月SIC变化的影响。云分数，云水路径和地面向下长波通量在9月海冰退缩地区的表面被发现在3月1日至5月14日期间的正趋势，而在5月15日至6月28日期间被发现的负趋势。计算了春季云/辐射特征与9月SIC相关的空间分布，结果表明，春季云含量的增加和向下长波通量的增加有利于海冰融化，云的增暖效应较强。从5月到6月，当海冰开始融化时，地面向下和向上的短波通量起着重要的作用。各参数线性去趋势和非线性去趋势的比较表明，在年际时间尺度上，云和辐射特性对楚科奇海/博福特海9月海冰退缩的影响显著，尤其是在3月31日至4月29日期间，而在拉普捷夫海/西伯利亚海发现了最强的气候趋势。
The most prominent September Arctic sea ice decline over the period of 2000–2015 occurs over the Siberian Sea, Laptev Sea, and Kara Sea. The satellite observed and retrieved sea ice concentration (SIC) and cloud/radiation properties over the Arctic (70°–90°N) have been used to investigate the impact of springtime cloud and radiation properties on September SIC variation. Positive trends of cloud fractions, cloud water paths, and surface downward longwave flux at the surface over the September sea ice retreat areas are found over the period of 1 March to 14 May, while negative trends are found over the period of 15 May to 28 June. The spatial distributions of correlations between springtime cloud/radiation properties and September SIC have been calculated, indicating that increasing cloud fractions and downward longwave flux during springtime tend to enhance sea ice melting due to strong cloud warming effect. Surface downward and upward shortwave fluxes play an important role from May to June when the onset of sea ice melting occurs. The comparison between linearly detrended and nondetrended of each parameter indicates that significant impact of cloud and radiation properties on September sea ice retreat occurs over the Chukchi/Beaufort Sea at interannual time scale, especially over the period of 31 March to 29 April, while strongest climatological trends are found over the Laptev/Siberian Sea.