【摘 要】
：
本文重点分析了2013年夏季格陵兰冰盖表面的融化特征,并将2013年与2012融化极值年的异常进行对比,探讨二者之间存在的动力和热力差异及其对冰盖表面融化的影响和机制.结果表明：2013年夏季格陵兰冰盖表面最大融化范围仅为44％,远小于2012年的97％,持续的时间也比2012年短20天左右,平均的融化面积和持续时间都接近气候平均态.2013年夏季大气环流异常与2012年近乎完全相反,格陵兰及附近
【机 构】
：
中国科学院大气物理研究所大气科学和地球流体力学数值模拟国家重点实验室,北京100029
论文部分内容阅读
本文重点分析了2013年夏季格陵兰冰盖表面的融化特征,并将2013年与2012融化极值年的异常进行对比,探讨二者之间存在的动力和热力差异及其对冰盖表面融化的影响和机制.结果表明：2013年夏季格陵兰冰盖表面最大融化范围仅为44％,远小于2012年的97％,持续的时间也比2012年短20天左右,平均的融化面积和持续时间都接近气候平均态.2013年夏季大气环流异常与2012年近乎完全相反,格陵兰及附近海域为低压异常,500-hPa位势高度场为负异常,大气环流和2012年相比更具有纬向型.格陵兰岛的北部和南部出现气旋异常,有利于输送北极的冷空气到格陵兰岛,不仅降低了夏季格陵兰冰盖表面的平均温度,而且也减少了格陵兰高温事件发生的频率.
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