北极夏季海冰反照率的观测和数值模拟试验  

Arctic sea ice albedo in summer:observation and modelling experiments

作　　者：杨清华[1] 程斌 雷瑞波[3] 王先桥[1] 杨宇[4] 张占海[3] 

机构地区：[1]国家海洋环境预报中心国家海洋局海洋灾害预报技术研究重点实验室,北京100081 [2]Finnish Meteorological Institute,Helsinki,Finland [3]中国极地研究中心,上海200136 [4]大连理工大学海岸和近海工程国家重点实验室,大连116024

出　　处：《海洋学报》2011年第2期42-47,共6页

基　　金：国家自然科学基金项目(40930848,41006115);欧盟项目(DAMOCLES);挪威科学委员会资助项目(AMORA);国际极地年中国行动计划项目;国家海洋局极地考察办公室对外合作项目(IC2010014);中国极地科学战略研究基金(20080215)

摘　　要：在中国第3次北极科学考察浮冰站开展了积雪/海冰反照率观测。本文对观测结果进行了分析,并结合一维高分辨雪/冰模式（HIGHTSI）对3个常用的反照率参数化方案在天气尺度的表现进行了评估。观测期间测站反照率变化范围0.75~0.85,其天气尺度变化同天气和表面冰、雪状况紧密相关,降雪和吹雪过程可改变表面积雪厚度及水平分布,进而显著影响反照率。考虑雪、冰厚度变化时,模式能很好的再现反照率的变化趋势,但难以准确模拟出反照率的日变化。The surface albedo was observed at the Ice Camp during the Chinese National Arctic Research Expedition（CHINARE） at the end of melting season in 2008.The in situ data were investigated in this paper.Several albedo parameterizations were incorporated into a one-dimensional high-resolution thermodynamic snow/ice model（HIGHTSI） to simulate local surface albedo.The observed albedo varies between 0.75～0.85 during the observation period with a slightly decreasing trend,the local change of albedo was strongly linked with snowfall/sleet and snow drift events.The trend of observed surface albedo can be captured by an albedo scheme taken snow and ice thicknesses into account.Albedo schemes with the current complexity,however,are difficult to reconstruct the short-term variability.

关 键 词：北极 海冰 反照率 观测 数值模拟 

分 类 号：P727[天文地球—海洋科学]