Impact of dynamic albedo and vegetation fraction on the simulation of drought in southeast Australia using a regional climate model

Jason P. Evans, Matthew McCabe, Xianhong Meng

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The Weather Research and Forecasting (WRF) regional model was run from 2000 to 2009 over southeast Australia. During this period the region entered into and later (partially) recovered, from a severe drought. The model used the following physics schemes: WRF Single Moment 5-class microphysics scheme; Rapid Radiative Transfer Model (RRTM) longwave radiation scheme; Dudhia shortwave radiation scheme; Monin-Obukhov surface layer similarity; Noah land-surface scheme; Yonsei University boundary layer scheme and Kain-Fritsch cumulus physics scheme. The model simulation uses boundary conditions from the NCEP/NCAR reanalysis with an outer 50 km resolution nest and an inner 10-km resolution nest. Both nests used 30 vertical levels spaced closer together in the planetary boundary layer. WRF was run in control mode with the default climatological surface albedo and vegetation fraction datasets, as well as with these datasets prescribed using satellite data. Comparison of these simulations demonstrates the importance of capturing the dynamic nature of these fields as the climate moves into (and then out of) a persistent multi-year drought. Both simulations capture the drought reasonably well, emphasising changes in the large scale circulation as a primary cause. Differences in the surface conditions do, however, provide regional differences in the drought severity and speed of recovery.

Original languageEnglish (US)
Title of host publicationRemote Sensing and Hydrology
Pages262-265
Number of pages4
StatePublished - Dec 1 2012
EventRemote Sensing and Hydrology Symposium - Jackson Hole, WY, United States
Duration: Sep 27 2010Sep 30 2010

Publication series

NameIAHS-AISH Publication
Volume352
ISSN (Print)0144-7815

Other

OtherRemote Sensing and Hydrology Symposium
CountryUnited States
CityJackson Hole, WY
Period09/27/1009/30/10

Keywords

  • Albedo
  • Drought
  • Murray-Darling Basin
  • Vegetation cover

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)

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