411
18
Microwave Vegetation
Indices from Satellite
Passive Microwave
Sensors for Mapping
Global Vegetation Cover
Jiancheng Shi and Thomas J. Jackson
CONTENTS
18.1 Introduction .................................................................................................. 412
18.2 Theoretical Basis of the New Microwave Vegetation Indices ...................... 414
18.2.1 Microwave Emission Model ............................................................. 414
18.2.2 Characteristics of Bare Surface Emission Signals in Two
Adjacent AMSR-E Frequencies ........................................................ 416
18.2.3 Development of Microwave Vegetation Indices ............................... 418
18.3 Derivation of the Microwave Vegetation Indices from Sensor
Measurements and Their Physical Characteristics ....................................... 419
18.3.1 Derivation of Microwave Vegetation Indices from AMSR-E
Measurements ................................................................................... 419
18.3.2 General Characteristics of Microwave Vegetation Indices .............. 420
18.4 Evaluation of the Microwave Vegetation Indices ......................................... 422
18.4.1 Data ................................................................................................... 422
18.4.2 Global Pattern and Seasonal Variation Analyses ............................. 423
18.4.2.1 Eurasia ............................................................................... 424
18.4.2.2 Africa and Australia .......................................................... 426
18.4.2.3 South America ................................................................... 426
18.4.2.4 North America ................................................................... 427
18.4.3 Analyses of MVI’s New Information for Vegetation Monitoring .... 429
18.5 Conclusions ................................................................................................... 436
References .............................................................................................................. 437
18
Microwave Vegetation
Indices from Satellite
Passive Microwave
Sensors for Mapping
Global Vegetation Cover
Jiancheng Shi and Thomas J. Jackson
CONTENTS
18.1 Introduction .................................................................................................. 412
18.2 Theoretical Basis of the New Microwave Vegetation Indices ...................... 414
18.2.1 Microwave Emission Model ............................................................. 414
18.2.2 Characteristics of Bare Surface Emission Signals in Two
Adjacent AMSR-E Frequencies ........................................................ 416
18.2.3 Development of Microwave Vegetation Indices ............................... 418
18.3 Derivation of the Microwave Vegetation Indices from Sensor
Measurements and Their Physical Characteristics ....................................... 419
18.3.1 Derivation of Microwave Vegetation Indices from AMSR-E
Measurements ................................................................................... 419
18.3.2 General Characteristics of Microwave Vegetation Indices .............. 420
18.4 Evaluation of the Microwave Vegetation Indices ......................................... 422
18.4.1 Data ................................................................................................... 422
18.4.2 Global Pattern and Seasonal Variation Analyses ............................. 423
18.4.2.1 Eurasia ............................................................................... 424
18.4.2.2 Africa and Australia .......................................................... 426
18.4.2.3 South America ................................................................... 426
18.4.2.4 North America ................................................................... 427
18.4.3 Analyses of MVI’s New Information for Vegetation Monitoring .... 429
18.5 Conclusions ................................................................................................... 436
References .............................................................................................................. 437