论文标题
全球农业干旱监测的集成SMO和MODIS应用的初步评估
Preliminary assessment of an integrated SMOS and MODIS application for global agricultural drought monitoring
论文作者
论文摘要
提出了土壤水分农业干旱指数（SMADI）在全球范围内的应用。该指数与MODIS的陆地表面温度（LST）和归一化差异植被指数（NDVI）相结合，从MODIS中融合了植被指数（NDVI），并允许在中等空间尺度（0.05度）下进行全球干旱监测。从2010年到2015年，在地球上所有农业地区，获得了Smadi的双周地图。将Smadi的时间表与伊比利亚半岛上的最先进的干旱指数进行了比较。结果表明，在五个气象站（具有相关系数为-0.64至-0.79）中检索的Smadi和农作物水分指数（CMI）与土壤水分水分水分测量站网络（resedhus）（Reledhus）（R = -0.83）的土壤缺陷指数（SWDI）。还使用植被干旱反应指数（VEGDRI）对美国大陆进行了一些初步测试，对夏季季节的干旱的空间发生的结果非常令人鼓舞。此外，Smadi允许在2012年春季确定印度半岛上区域干旱的独特模式。总体结果支持Smadi在全球范围内使用Smadi监测农业干旱事件。
An application of the Soil Moisture Agricultural Drought Index (SMADI) at the global scale is presented. The index integrates surface soil moisture from the SMOS mission with land surface temperature (LST) and Normalized Difference Vegetation Index (NDVI) from MODIS and allows for global drought monitoring at medium spatial scales (0.05 deg).. Biweekly maps of SMADI were obtained from year 2010 to 2015 over all agricultural areas on Earth. The SMADI time-series were compared with state-of-the-art drought indices over the Iberian Peninsula. Results show a good agreement between SMADI and the Crop Moisture Index (CMI) retrieved at five weather stations (with correlation coefficient, R from -0.64 to -0.79) and the Soil Water Deficit Index (SWDI) at the Soil Moisture Measurement Stations Network of the University of Salamanca (REMEDHUS) (R=-0.83). Some preliminary tests were also made over the continental United States using the Vegetation Drought Response Index (VegDRI), with very encouraging results regarding the spatial occurrence of droughts during summer seasons. Additionally, SMADI allowed to identify distinctive patterns of regional drought over the Indian Peninsula in spring of 2012. Overall results support the use of SMADI for monitoring agricultural drought events world-wide.
