干旱区生态环境知识资源中心(Arid): 中国月平均地表反照率的估算及其时空分布

Arid

	中国月平均地表反照率的估算及其时空分布
其他题名	Estimation and Spatio-Temporal Distribution of Monthly Mean Surface Albedo in China
	蔡福 1; 祝青林 1; 何洪林 2; 刘新安 1; 于贵瑞 2
来源期刊	资源科学
ISSN	1007-7588
出版年	2005
卷号	27 期号:1 页码:116-120
中文摘要	本文利用1948年～2003年55年平均的NCEP/NCAR(NationalCenterforEnvironmentalPrediction/NationalCenterforAtmosphericResearch,美国国家环境预报中心/美国国家大气研究中心)再分析辐射资料和中国10km10km土地利用类型图,借助GIS、GrADS(GridAnalysisandDisplaySystem,网格分析与展示系统)等空间化技术,采用图形回归处理等方法建立了国家尺度的10km10km的中国地表月平均反照率栅格图.研究表明,估算的地表反照率的季节变化十分明显:冬季(1月)最大,夏季(7月)最小,春秋季(4月和10月)次之,且秋季比春季稍大;空间分布与地理纬度、地势高低和距海远近关系很大,西部地区大于东部地区,北部地区大于南部地区,高海拔地区大于丘陵和平原地区.几种土地覆被类型反照率的估计值如下:林地、水稻和小麦地为0.17～0.23;草地为0.20～0.32;雪被为0.44～0.76;沙漠为0.35左右.总的来说,估算结果比较合理,能够较好地反映出中国地表反照率的时间、空间变化特征,也能反映多年气候平均值的特点.因此,在目前气候要素之一的多年平均的地表反照率研究较少的情况下,利用多年平均NCEP/NCAR再分析资料与土地利用类型图进行回归处理不失为是一种相对合理的方法.
英文摘要	Based on mean NCEP/NCAR (National Center for Environmental Prediction/National Center for Atmospheric Research) reanalysis radiation data from 1948 to 2003, and land use cover map with a reso-lution of 10km x 10km, we have obtained monthly thematic map of surface albedo in China with a resolu-tion of 10km X 10km using^GIS, GrADS(Grid Analysis and Display System) and the regression method that played an important role in smoothing and reassigning weigh to grid data. By analyzing, the results indi-cated that the spatio-temporal distribution of surface albedo had following characteristics: Firstly, the esti-mated value of surface albedo showed the evident seasonal variation. The estimated value of surface albedo was highest in winter (January) and gradually decreased to a minimum until summer (July), then in-creased again in autumn(October) , with a higher value in autumn than that in spring(April) ; Secondly, the spatial distribution of surface albedo had close relation and increased with latitude, elevation and the distance to sea. The estimated values of surface albedo of several type of surface changed with a range of between 0.17-0.23, 0.20-0.32, 0.17 ~ 0.23 and 0.44 - 0.76 at forest, grassland, cropland and snow cover, respectively; The estimated values of surface albedo at desert is about 0.35. Generally, the study result is reasonable and can distinctly reflect the feature of spatio-temporal distribution of surface al-bedo that represented a long-term climatic condition in China. Therefore, with few studies of monthly mean surface albedo, the method presented in this study is relatively rational to estimate monthly mean surface albedo by using NCEP/NCAR reanalysis radiation data and land use cover map.
中文关键词	地表反照率 ; 空间化 ; NCEP/NCAR再分析资料 ; 回归处理
英文关键词	Surface albedo Spatialization NCEP/NCAR reanalysis data Regression
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ENVIRONMENTAL SCIENCES
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:1910275
来源机构	中国科学院地理科学与资源研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/207094
作者单位	1.沈阳农业大学应用气象系, 沈阳, 辽宁 110161, 中国; 2.中国科学院地理科学与资源研究所, 北京 100101, 中国
推荐引用方式 GB/T 7714	蔡福,祝青林,何洪林,等. 中国月平均地表反照率的估算及其时空分布[J]. 中国科学院地理科学与资源研究所,2005,27(1):116-120.
APA	蔡福,祝青林,何洪林,刘新安,&于贵瑞.(2005).中国月平均地表反照率的估算及其时空分布.资源科学,27(1),116-120.
MLA	蔡福,et al."中国月平均地表反照率的估算及其时空分布".资源科学 27.1(2005):116-120.