Comparison of albedos computed by land surface models and evaluation against remotely sensed data

Xue Wei, Andrea N. Hahmann, Robert E. Dickinson, Zong Liang Yang, Xubin Zeng, Kimberly J. Schaudt, Crystal B. Schaaf, Nicholas Strugnell

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

The albedos of two land surface models, the Biosphere-Atmosphere Transfer Scheme (BATS) and the NCAR Land Surface Model (LSM), are compared with remotely sensed data and each other. The model albedos differ primarily because of their assumptions about and model differences in soil moisture content, soil color, snow albedo, shading of snow by canopy, and prescribed parameters for each land cover type. Global albedo maps for February and July 1995, developed from the advanced very high resolution radiometer (AVHRR) data, are used to evaluate model albedos. The models display a high bias as compared to the remotely sensed values in desert and semidesert regions. Over North Africa, LSM, whose albedos were previously tuned to data from the Earth Radiation Budget Experiment (ERBE), has the highest albedos. Elsewhere, and overall, BATS has the highest bias for desert and semidesert regions. Both models demonstrate a high bias over regions of winter snow, where the AVHRR data are expected to have a negative bias. LSM has especially high winter albedos, apparently because of intercepted snow increasing its canopy albedo.

Original languageEnglish (US)
Article number2001JD900218
Pages (from-to)20687-20702
Number of pages16
JournalJournal of Geophysical Research: Space Physics
Volume106
Issue numberD18
StatePublished - Sep 27 2001

Fingerprint

albedo
land surface
evaluation
snow
Snow
biosphere
Advanced Very High Resolution Radiometer
Advanced very high resolution radiometers (AVHRR)
canopies
deserts
AVHRR
winter
Earth radiation budget experiment
desert
canopy
soil color
comparison
atmospheres
soil moisture
atmosphere

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Atmospheric Science
  • Astronomy and Astrophysics
  • Oceanography

Cite this

Wei, X., Hahmann, A. N., Dickinson, R. E., Yang, Z. L., Zeng, X., Schaudt, K. J., ... Strugnell, N. (2001). Comparison of albedos computed by land surface models and evaluation against remotely sensed data. Journal of Geophysical Research: Space Physics, 106(D18), 20687-20702. [2001JD900218].

Comparison of albedos computed by land surface models and evaluation against remotely sensed data. / Wei, Xue; Hahmann, Andrea N.; Dickinson, Robert E.; Yang, Zong Liang; Zeng, Xubin; Schaudt, Kimberly J.; Schaaf, Crystal B.; Strugnell, Nicholas.

In: Journal of Geophysical Research: Space Physics, Vol. 106, No. D18, 2001JD900218, 27.09.2001, p. 20687-20702.

Research output: Contribution to journalArticle

Wei, X, Hahmann, AN, Dickinson, RE, Yang, ZL, Zeng, X, Schaudt, KJ, Schaaf, CB & Strugnell, N 2001, 'Comparison of albedos computed by land surface models and evaluation against remotely sensed data', Journal of Geophysical Research: Space Physics, vol. 106, no. D18, 2001JD900218, pp. 20687-20702.
Wei X, Hahmann AN, Dickinson RE, Yang ZL, Zeng X, Schaudt KJ et al. Comparison of albedos computed by land surface models and evaluation against remotely sensed data. Journal of Geophysical Research: Space Physics. 2001 Sep 27;106(D18):20687-20702. 2001JD900218.
Wei, Xue ; Hahmann, Andrea N. ; Dickinson, Robert E. ; Yang, Zong Liang ; Zeng, Xubin ; Schaudt, Kimberly J. ; Schaaf, Crystal B. ; Strugnell, Nicholas. / Comparison of albedos computed by land surface models and evaluation against remotely sensed data. In: Journal of Geophysical Research: Space Physics. 2001 ; Vol. 106, No. D18. pp. 20687-20702.
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