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Comparative evaluation and difference analysis of SMOS and SMAP satellite remote sensing soil moisture products
- Acta Scientiarum Naturalium Universitatis Sunyatseni Vol. 61, Issue 5, Pages: 9-21(2022)
- 作者机构：
中山大学地理科学与规划学院，广东 广州 510006
- 作者简介：
- 基金信息：
DOI：10.13471/j.cnki.acta.snus.2021D049
CLC： P426.68Published：25 September 2022，
Published Online：27 January 2022，
Received：08 July 2021，
Accepted：16 August 2021
扫 描 看 全 文
孟越,王大刚,林泳恩等.SMOS和SMAP卫星土壤水分产品的对比评价与差异分析[J].中山大学学报(自然科学版),2022,61(05):9-21.
MENG Yue,WANG Dagang,LIN Yongen,et al.Comparative evaluation and difference analysis of SMOS and SMAP satellite remote sensing soil moisture products[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2022,61(05):9-21.
孟越,王大刚,林泳恩等.SMOS和SMAP卫星土壤水分产品的对比评价与差异分析[J].中山大学学报(自然科学版),2022,61(05):9-21. DOI： 10.13471/j.cnki.acta.snus.2021D049.
MENG Yue,WANG Dagang,LIN Yongen,et al.Comparative evaluation and difference analysis of SMOS and SMAP satellite remote sensing soil moisture products[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2022,61(05):9-21. DOI： 10.13471/j.cnki.acta.snus.2021D049.
摘要
为了对比分析SMOS（soil moisture and ocean salinity）和SMAP（soil moisture active passive）遥感产品土壤含水量数据的质量与精度，本文基于来自美国本土的3种测站网络CRN（climate reference network）、SCAN（soil climate analysis network）和SNOTEL（snowpack telemetry network）的261个站点实测数据，从整体与分站点两个角度进行评价，并探究影响二者表现差异的不同影响因子。结果表明：① 对两种卫星遥感水分产品进行整体评价或按照站点进行评价时，SMAP表现均优于SMOS；② 同一土壤水分产品在不同土地覆盖类型下的精度差异较大，不同土壤水分产品对于同种土地覆盖类型的响应不同；③ 季节变化下温度和降水变化，从而影响卫星反演精度；④ 地形与海拔变化也会引起卫星产品反演水平的变化，随着海拔高度升高，卫星观测的准确性降低。综合来看，目前直接利用卫星观测获取的土壤含水量与实测值之间仍存在一定差异，未来我们应进一步提高卫星观测数据的准确性。
Abstract
To compare and evaluate the quality and accuracy of soil moisture data of SMOS (soil moisture and ocean salinity) and SMAP (soil moisture active passive) remote sensing products
using the actual measurement of 261 stations from three types of stations in the United States
i.e.
CRN (climate reference network)
SCAN (soil climate analysis network)
and SNOTEL (snowpack telemetry network)
the different influencing factors that affect the performance were explored from the perspectives of the whole and the individual sites. The results show that: 1) When the two satellite remote sensing moisture products are evaluated as a whole or according to sites
SMAP performs better than SMOS. 2) The accuracy of the same soil moisture product varies greatly under different land cover types; different soil moisture products have different responses to the same land cover type. 3) The temperature and precipitation changes under seasonal changes
which affect the accuracy of satellite inversion. 4) The terrain and altitude changes also cause changes in the inversion level of satellite products. As the altitude increases
the accuracy of satellite observations decreases. In general
there is still some difference between the soil moisture directly obtained from satellite observation and the station data. In the future
we should further improve the accuracy of satellite observation data.
关键词
土壤含水量土壤水分卫星遥感产品对比评价差异分析
Keywords
soil moisturesatellite remote sensing soil moisture productscomparative evaluationdifference analysis
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