Interannual variation in satellite-derived estimates of leaf-area index reflect measured changes in annual catchment water balances across southwestern Australia, 2000-2006

Smettem, K., Waring, R., Callow, J. N. and Mu, Q. (2008). Interannual variation in satellite-derived estimates of leaf-area index reflect measured changes in annual catchment water balances across southwestern Australia, 2000-2006. In: Geophysical Research Abstracts. 5th EGU General Assembly, Vienna, Austria, (). 13 - 18 April, 2008.

Author Smettem, K.
Waring, R.
Callow, J. N.
Mu, Q.
Title of paper Interannual variation in satellite-derived estimates of leaf-area index reflect measured changes in annual catchment water balances across southwestern Australia, 2000-2006
Conference name 5th EGU General Assembly
Conference location Vienna, Austria
Conference dates 13 - 18 April, 2008
Proceedings title Geophysical Research Abstracts
Place of Publication Vienna, Austria
Publisher Copernicus GmbH
Publication Year 2008
ISSN 1607-7962
Volume 10
Total pages 1
Language eng
Abstract/Summary Across a large area of south-west Western Australia we derived estimates of annual evapotranspiration (ET) from the difference between annual precipitation (derived from ANUCLIM) and gauged runoff. Between 2000 and 2006 calculated annual ET varied from a low of 473 mm (2006) to a high of 777 mm (2005) in one well instrumentated catchment of over 250,000 ha. In the same area, maximum leaf-area indices (LAI), assessed by NASA’s Moderate Resolution Imaging Spectromradiomete at a spatial resolution of 3 x 3 km, decreased between 2005 and 2006 in response to drought conditions. The decrease was consistent with the observed reduction in ET. The approach was extended to a larger portion of s.w. Australia with the observation that drier than average years result in larger than average fires that further reduce LAI. Implications for impacts of climate change across south-west Western Australia are discussed.
Subjects 0406 Physical Geography and Environmental Geoscience
040608 Surfacewater Hydrology
040603 Hydrogeology
Keyword Catchment water balances
Evapotranspiration
Gauged runoff
Maximum leaf-area indices (LAI)
Western Australia
Climate Impacts
Q-Index Code EX
Q-Index Status Provisional Code
Institutional Status Unknown
Additional Notes Published online.

 
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Created: Fri, 26 Feb 2010, 09:21:18 EST by Rosalind Blair on behalf of Faculty of Science