摘要
分析祁连山海北高寒草甸地区2002年太阳总辐射（Eg）、UV-B及UV-B占Eg比例的气候变化特征。结果表明：海北站地区UV-B较强，日瞬时最高接近10W·m^-2，日总量最高达0．204MJ·m^-2；日、年变化依Eg的日、年变化具有显著的正相关关系。UV-B与Eg的比值（η），不论是日变化还是年变化表现明显，一日间早晚低，中午高，一年间6月最高，冬季的12月低，与太阳高度角的变化具有一定的正相关关系。年平均η约为0．54％，植物生长期的5～9月约为0．65％。在海北高寒草甸地区Eg和UV-B的年总量分别达6387．436MJ·m^-2和35．981MJ·m^-2。
UV-B changing characteristics and the percentage of UV-B account for Eg were analyzed based on Eg and UV-B data during 2002 at alpine meadow area of Haibei Station among Qiliang Mountain. It is suggested that there are stronger UV-B at Haibei Station area, daily instantaneous peak is near 10W·m^-2 , daily gross is 0. 204MJ· m^-2; and significant positive correlation exists between daily and annual change of UV-B and Eg. The daily and annual changes of rations between UV-B and Eg （η）are obvious, morning and evening higher than that at noontime, and at June it reach the peak and December to rock bottom. Annual mean （ is 0.54% and during growing season （May to September） is 0. 65%, approximately. Annual gross Eg and UV-B are 6387. 436 MJ · m^-2and 35. 981 MJ · m^-2 of alpine meadow area at Harbei Station, respectively.
出处
《干旱区资源与环境》
CSSCI
CSCD
北大核心
2006年第3期79-84,共6页
Journal of Arid Land Resources and Environment
基金
中国科学院知识创新工程重大项目(KZCX1-SW-01-01)
国家重点基础研究发展规划项目(2002CB412501)
中日合作"以21世纪亚洲陆地生态系统碳管理为目标的综合碳收支研究"
中日合作"亚太地区环境创新战略计划(APEIS)"
关键词
高寒草甸
UV-B
气候变化
特征
alpine meadow
UV-B
climate change
characteristics
