Comparing optical and microwave remote sensing-based vegetation density over mongolia for 1988-2006

Y. Liu; R. De Jeu; M. Mccabe; J. Evans; A. Van Dijk

Comparing optical and microwave remote sensing-based vegetation density over mongolia for 1988-2006

Y. Liu^*, R. De Jeu, M. Mccabe, J. Evans, A. Van Dijk

^*Corresponding author for this work

Research output: Contribution to conference › Paper › peer-review

Abstract

Vegetation density plays an important role in water and energy balance. Satellite-based optical and microwave sensors are expected to provide complementary vegetation information. Here we compared NDVI from AVHRR and vegetation optical depth (VOD) from SSM/I over Mongolia from 1988 through 2006. Both products show similar spatial distribution in annual average and are able to capture similar inter-annual variations. However, the long term changes reflected by them are divergent. Microwave based VOD shows considerable decreasing trends over grassland, whereas NDVI shows slight declines and even increasing trends. Further investigations are required to identify the causes for their divergence.

Original language	English (US)
State	Published - 2011
Externally published	Yes
Event	34th International Symposium on Remote Sensing of Environment - The GEOSS Era: Towards Operational Environmental Monitoring - Sydney, NSW, Australia Duration: Apr 10 2011 → Apr 15 2011

Other

Other	34th International Symposium on Remote Sensing of Environment - The GEOSS Era: Towards Operational Environmental Monitoring
Country/Territory	Australia
City	Sydney, NSW
Period	04/10/11 → 04/15/11

Keywords

Microwave
NDVI
Optical
Remote sensing
Vegetation optical depth (VOD)

ASJC Scopus subject areas

Computer Networks and Communications
Environmental Engineering

Cite this

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title = "Comparing optical and microwave remote sensing-based vegetation density over mongolia for 1988-2006",

abstract = "Vegetation density plays an important role in water and energy balance. Satellite-based optical and microwave sensors are expected to provide complementary vegetation information. Here we compared NDVI from AVHRR and vegetation optical depth (VOD) from SSM/I over Mongolia from 1988 through 2006. Both products show similar spatial distribution in annual average and are able to capture similar inter-annual variations. However, the long term changes reflected by them are divergent. Microwave based VOD shows considerable decreasing trends over grassland, whereas NDVI shows slight declines and even increasing trends. Further investigations are required to identify the causes for their divergence.",

keywords = "Microwave, NDVI, Optical, Remote sensing, Vegetation optical depth (VOD)",

author = "Y. Liu and {De Jeu}, R. and M. Mccabe and J. Evans and {Van Dijk}, A.",

year = "2011",

language = "English (US)",

note = "34th International Symposium on Remote Sensing of Environment - The GEOSS Era: Towards Operational Environmental Monitoring ; Conference date: 10-04-2011 Through 15-04-2011",

}

Comparing optical and microwave remote sensing-based vegetation density over mongolia for 1988-2006. / Liu, Y.; De Jeu, R.; Mccabe, M. et al.
2011. Paper presented at 34th International Symposium on Remote Sensing of Environment - The GEOSS Era: Towards Operational Environmental Monitoring, Sydney, NSW, Australia.

Research output: Contribution to conference › Paper › peer-review

TY - CONF

T1 - Comparing optical and microwave remote sensing-based vegetation density over mongolia for 1988-2006

AU - Liu, Y.

AU - De Jeu, R.

AU - Mccabe, M.

AU - Evans, J.

AU - Van Dijk, A.

PY - 2011

Y1 - 2011

N2 - Vegetation density plays an important role in water and energy balance. Satellite-based optical and microwave sensors are expected to provide complementary vegetation information. Here we compared NDVI from AVHRR and vegetation optical depth (VOD) from SSM/I over Mongolia from 1988 through 2006. Both products show similar spatial distribution in annual average and are able to capture similar inter-annual variations. However, the long term changes reflected by them are divergent. Microwave based VOD shows considerable decreasing trends over grassland, whereas NDVI shows slight declines and even increasing trends. Further investigations are required to identify the causes for their divergence.

AB - Vegetation density plays an important role in water and energy balance. Satellite-based optical and microwave sensors are expected to provide complementary vegetation information. Here we compared NDVI from AVHRR and vegetation optical depth (VOD) from SSM/I over Mongolia from 1988 through 2006. Both products show similar spatial distribution in annual average and are able to capture similar inter-annual variations. However, the long term changes reflected by them are divergent. Microwave based VOD shows considerable decreasing trends over grassland, whereas NDVI shows slight declines and even increasing trends. Further investigations are required to identify the causes for their divergence.

KW - Microwave

KW - NDVI

KW - Optical

KW - Remote sensing

KW - Vegetation optical depth (VOD)

UR - http://www.scopus.com/inward/record.url?scp=84879778174&partnerID=8YFLogxK

M3 - Paper

AN - SCOPUS:84879778174

T2 - 34th International Symposium on Remote Sensing of Environment - The GEOSS Era: Towards Operational Environmental Monitoring

Y2 - 10 April 2011 through 15 April 2011

ER -

Comparing optical and microwave remote sensing-based vegetation density over mongolia for 1988-2006

Abstract

Other

Keywords

ASJC Scopus subject areas

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