干旱区生态环境知识资源中心(Arid): 黄土高原半干旱区地表辐射特征

Arid

	黄土高原半干旱区地表辐射特征
其他题名	Characteristics of surface radiation over semi-arid region of the Loess Plateau
	闭建荣; 黄建平; 刘玉芝; 张武; 史晋森; 黄忠伟
ISSN	0455-2059
出版年	2008
卷号	44 期号:3 页码:33-38
中文摘要	利用兰州大学半干旱气候与环境观测站地表辐射资料，分析了黄土高原半干旱区地表辐射的变化规律，并对该区地表辐射特征、地表反照率的年季变化及其影响机制进行了研究．结果表明：该区全年太阳总辐射较强，年平均值为204．2W／m~2，受地表状况和天气过程等因素影响，年变化表现出不规则或区域性特征．大气和地表对太阳辐射加热的响应需2个月，它们对地表辐射年变化的相对变幅达44．6％和38．9％，比干旱区的（100％）小，这说明该区云量年变化比干旱区的小，且大气和土壤对地表辐射变化的缓冲作用更强．反照率的年平均值为0．2432，比荒漠区小；其高值正好对应降雪过程和偏干旱时段，而低值则与降水、连绵阴雨的天气吻合．
英文摘要	Using the land-surface radiation data observed at the Semi-Arid Climate and Environment Observatory of Lanzhou University, the variation rule of land-surface radiation over the semi-arid region of the Loess Plateau was preliminarily analyzed, and the monthly averages of surface radiation balance, surface albedo and influence mechanism were completely studied. The result showed that the annual average radiant intensity was comparatively strong in this region. Upon the influence of land-surface conditions and synoptic conditions, the monthly averages of surface radiation take on irregular or territorial characteristics. Atmosphere and land-surface need about two months to respond to the heat of radiation in the variation of annually mean radiation. The whole-year variation ranges of atmosphere and land-surface radiation in the semi-arid region are 44.6% and 38,9%, respectively, which are much smaller than that in arid of deserted region （about 100%）. The annual average cloud in the semi-arid region is much more than that in the arid region. The annual average of surface albedo in the semi-arid region of the Loess Plateau is 0.243 2, which is smaller than that in the arid region. Large values of surface albedo is consistent with the appearance of droughty weather and snowfall synoptic, whereas the small values of surface albedo correspond to the emergence of cloudy sky and rainfall.
中文关键词	黄土高原 ; 半干旱区 ; 辐射平衡 ; 地表反照率
英文关键词	Loess Plateau semi-arid region radiation balance surface albedo
语种	中文
国家	中国
收录类别	CSCD
WOS类目	METEOROLOGY ATMOSPHERIC SCIENCES
WOS研究方向	Meteorology & Atmospheric Sciences
CSCD记录号	CSCD:3325315
来源机构	兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/222551
作者单位	兰州大学大气科学学院, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	闭建荣,黄建平,刘玉芝,等. 黄土高原半干旱区地表辐射特征[J]. 兰州大学,2008,44(3):33-38.
APA	闭建荣,黄建平,刘玉芝,张武,史晋森,&黄忠伟.(2008).黄土高原半干旱区地表辐射特征.,44(3),33-38.
MLA	闭建荣,et al."黄土高原半干旱区地表辐射特征".44.3(2008):33-38.