摘要
利用西大滩2007年气象和辐射观测数据研究了积雪对地表反照率和浅层地温的影响。结果显示:相对积雪日数和气温与反照率相关性显著,反照率随相对积雪日数的增大而增大,随气温的增大而减小。冷暖季降雪对地温的变化具有阻隔作用,冷季地温和气温都在-10℃左右时,<10cm厚的积雪对地温变化的影响不明显,地温和气温的变化趋势一致,地温的变幅不是很大;在暖季积雪厚度>10cm而且积雪持续时间达10d时,与气温相比积雪对地温变化的隔热绝缘作用较明显;雪深与积雪持续的时间均与地温呈反向变化。
By using the observation meteorological data and observation solar spectral radiation to study the infulence of snow cover on the surface albedo and ground temperature at XDT field observation in 2007.It shows surface albedo increases along with the increase of relative snowcover duration and decrease with the incresae of air temperature. Snowcover has the insulating impact on the ground temperature variation in the cold and warm season.In cold season snow cover has no obvious effect on the ground temperature and the amplitude of ground temperature when air and ground temperature fluctuate around -10℃and the snow thickness is less than 10 cm,and snow cover has insulating effect on the ground temperature in warm season when snow thickness is more than 10 cm and snow duration is about 10 days.Snow thickness and duration have the negative relationship with the groud temperatue.
出处
《山地学报》
CSCD
北大核心
2010年第3期266-273,共8页
Mountain Research
基金
国家重点基础研究发展计划(973计划) (2007CB411504
2005CB422003)
国家自然科学基金项目(40871037
40830533)
中科院方向性项目(KZCX3 -SW-345)
中国科学院青藏高原冰冻圈观测试验研究站~~
关键词
西大滩地区
雪深
相对积雪日数
地表反照率
地温
XDT region
snow depth
relative snowcover duration
surface albedo
groud temperature
