摘要
为了了解SMOS土壤水分数据产品对我国农区的作用,选取河南省4个站点(濮阳、卢氏、信阳、商丘),利用2011,2012年的4月、8月土壤水分实测数据和同期降雨数据,对SMOS L2土壤水分数据产品进行了验证分析。实验结果表明:针对我国的农耕地区,SMOS土壤水分反演值的干值偏差依然显著;受降水频次和强度的影响,其数值对湿季降水的响应要好于干季;而与实测值的相对和绝对差异亦显示,湿季两种土壤水分值的相关性优于干季;此外,通过站点间的比较,地理位置和土壤质地对其差异也存在一定影响。
In order to understand the effect of SMOS soil moisture data on agricultural area,This paper briefly describes the SMOS soil moisture selecting 4 sites in Henan province（ Puyang,Lushi,Xinyang,Shangqiu）,using in-situ data and precipitation data in April,August of 2011 and 2012,validate and analyze the SMOS L2 soil moisture product. The conclusion shows that in this typical agricultural area of China,the dry bias of SMOS soil moisture retrieval values remains significantly. Influenced by the frequency and intensity of precipitation,the retrieval values have a better response to wet season precipitation than dry season. Compared with the relative and absolute difference of in-situ values,it also shows that the correlation of two kinds of soil moisture values is more superior to wet season than dry season. In addition,through the comparison among the four sites,it found that geographical position and soil texture is a certain effect on the difference.
出处
《河南理工大学学报（自然科学版）》
CAS
北大核心
2015年第2期287-291,共5页
Journal of Henan Polytechnic University（Natural Science）
基金
矿山空间信息技术国家测绘地理信息局重点实验室开放基金资助项目(KLM201308)
河南省教育厅科学技术重点研究项目(14A420005)
河南理工大学青年基金资助项目(Q2014-07)
