大气科学进展（英文版）
大氣科學進展（英文版）
대기과학진전（영문판）
ADVANCES IN ATMOSPHERIC SCIENCES
2010年
1期
80-86
,共7页
余予%陈洪滨%夏祥鳌%宣越健%喻珂
餘予%陳洪濱%夏祥鼇%宣越健%喻珂
여여%진홍빈%하상오%선월건%유가
地表反照率%中国北方%天文台%卫星观测%地表面%熔化过程%能量收支%多类型
地錶反照率%中國北方%天文檯%衛星觀測%地錶麵%鎔化過程%能量收支%多類型
지표반조솔%중국북방%천문태%위성관측%지표면%용화과정%능량수지%다류형
surface albedo%snow%snow melting
Surface albedo over typical types of surfaces in the North China Plain was observed using a Multi-field Albedo Observation System before and after several snowfalls from 13 to 27 February 2005. Dramatic variations of the surface albedos of bare land, a frozen pond, and withered grassland during that period were analyzed. Under cloudy sky, the mean surface albedo of bare land was about 0.23, but it immediately rose to 0.85 when the surface was covered by fresh snow. The albedo decreased gradually to normal levels afterwards. The melting processes were different depending on the characteristics of the underlying surfaces. For example, over grassland the surface albedo was relatively lower after snowfall, and as a result, more solar energy could be absorbed and consequently the snow melting process was accelerated. Significant variations of surface albedo cannot be easily captured by satellite observations; therefore, detailed measurements of surface albedo and related parameters are essential for determining the impact of snow on the energy budget of the Earth.
