摘要
在陆面过程模式BATS中引入考虑太阳天顶角变化的裸土反照率参数化以改善沙漠、戈壁地表的辐射和热状况模拟,并与观测资料进行了对比。结果表明,各方案不同程度地改善了BATS反照率模拟过高和缺乏日变化等偏差,其中Wang等改进的BRDF和B方案分别使BATS在戈壁地表由-67.75 W·m-2的负偏差缩减到-0.59和0.22W·m-2,感热通量的负偏差缩小了一半,地表温度较大的负偏差控制在1K之内。研究结果肯定了太阳天顶角对裸土反照率计算的重要作用,认为上述方案适用于裸土地表。
Some albedo parameterizations of SZA dependence were evaluated in a simple land surface model BATS using in situ data over Gobi and Desert. Results indicate schemes of SZA dependence can improve the modeling of surface albedo in different degree in diurnal variation and values. Compared with the observations, methods of modified BRDF and B from Wang greatly reduce the negative bias in absorbed solar radiation, sensitive heat flux and ground temperature with the bias respectively decreasing from - 67. 75W· m^-2, - 74. 52W·m^2 and - 4. 93K to less than 0. 5W·m^2, a half and less than 1K or so, which suggest these methods are fit for the land modeling over bare soil.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2007年第7期775-782,共8页
Acta Energiae Solaris Sinica
基金
国家自然科学基金重点项目(40633014)
中国气象局兰州干旱气象研究所干旱开放课题基金项目(IAM200608)(IAM200513)
