Derivation and evaluation of global 1-km fractional vegetation cover data for land modeling

Xubin Zeng, Robert E. Dickinson, Alison Walker, Muhammad Shaikh, Ruth S. Defries, Jiaguo Qi

Research output: Contribution to journalArticle

243 Citations (Scopus)

Abstract

Fractional vegetation cover (σv) is needed in the modeling of the land-atmosphere exchanges of momentum, energy, water, and trace gases. From global 1-km, 10-day composite Advanced Very High Resolution Radiometer normalized difference vegetation index (NDVI) data from April 1992 to March 1993, global 1-km σv is derived based on the annual maximum NDVI value for each pixel in comparison with the NDVI value that corresponds to 100% vegetation cover for each International Geosphere-Biosphere Program land cover type. This dataset is pixel dependent but season independent, with the seasonal variation of vegetation greenness in a pixel accounted for by the leaf area index. The authors' algorithm is found to be insensitive to the use of a specific land cover classification. In comparison with an independent dataset derived by DeFries et al. by using a more sophisticated statistical approach, the current dataset has a similar spatial distribution but systematically smaller σv (particularly over shrublands and barren land cover). It also gives σv values that overall are consistent with those derived from higher-resolution aircraft and satellite data over Arizona and field-survey data over Germany.

Original languageEnglish (US)
Pages (from-to)826-839
Number of pages14
JournalJournal of Applied Meteorology
Volume39
Issue number6
StatePublished - Jun 2000

Fingerprint

NDVI
vegetation cover
pixel
land cover
IGBP
modeling
shrubland
trace gas
AVHRR
leaf area index
field survey
satellite data
momentum
aircraft
seasonal variation
spatial distribution
atmosphere
vegetation
energy
evaluation

ASJC Scopus subject areas

  • Atmospheric Science

Cite this

Zeng, X., Dickinson, R. E., Walker, A., Shaikh, M., Defries, R. S., & Qi, J. (2000). Derivation and evaluation of global 1-km fractional vegetation cover data for land modeling. Journal of Applied Meteorology, 39(6), 826-839.

Derivation and evaluation of global 1-km fractional vegetation cover data for land modeling. / Zeng, Xubin; Dickinson, Robert E.; Walker, Alison; Shaikh, Muhammad; Defries, Ruth S.; Qi, Jiaguo.

In: Journal of Applied Meteorology, Vol. 39, No. 6, 06.2000, p. 826-839.

Research output: Contribution to journalArticle

Zeng, X, Dickinson, RE, Walker, A, Shaikh, M, Defries, RS & Qi, J 2000, 'Derivation and evaluation of global 1-km fractional vegetation cover data for land modeling', Journal of Applied Meteorology, vol. 39, no. 6, pp. 826-839.
Zeng, Xubin ; Dickinson, Robert E. ; Walker, Alison ; Shaikh, Muhammad ; Defries, Ruth S. ; Qi, Jiaguo. / Derivation and evaluation of global 1-km fractional vegetation cover data for land modeling. In: Journal of Applied Meteorology. 2000 ; Vol. 39, No. 6. pp. 826-839.
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