【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。更多还原

【Abstract】 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.更多还原