Freeze/thaw classification for prairie soils using SSM/I radiobrightnesses

被引：63

作者：

Judge, J ^{[1
]}

Galantowicz, JF ^{[1
]}

England, AW ^{[1
]}

Dahl, P ^{[1
]}

机构：

[1] UNIV MICHIGAN,DEPT ATMOSPHER OCEAN & SPACE SCI,ANN ARBOR,MI 48109

来源：

IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING | 1997年 / 35卷 / 04期

基金：

美国国家航空航天局;

关键词：

D O I：

10.1109/36.602525

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

Data from the Nimbus-7 Scanning Multichannel Microwave Radiometer (SMMR) have been used to classify snow-free soils in the northern Great Plains as either frozen or thawed, The technique is based on differing sensitivities among SMMR radiobrightness frequencies to liquid moisture and volume scattering in the upper few millimeters of bare soil, The SMMR is no longer active, A current near-equivalent is the Special Sensor Microwave/Imager (SSM/I). We demonstrate that SSM/I radiobrightnesses also exhibit differential sensitivities to liquid water and volume scattering in frozen soil despite their higher frequencies, We find that the best classification discriminants for SSM/I data are a combination of the 37-GHz V-pol radiobrightnesses and the 19-to-37-GHz V-pol spectral gradients. We also examine the sensitivity of the classification to atmospheric emission and absorption and find little effect.

引用

页码：827 / 832

页数：6