Sensitivity of the NCEP/Noah land surface model to the MODIS green vegetation fraction data set

Jesse Miller, Michael Barlage, Xubin Zeng, Helin Wei, Kenneth Mitchell, Dan Tarpley

Research output: Contribution to journalArticle

39 Citations (Scopus)

Abstract

Land surface processes are strongly controlled by vegetation cover. Current land surface models represent vegetation as a combination of leaf area index (LAI) and green vegetation fraction (GVF) parameters. The purpose of the study is to examine the impact of a spatially and temporally detailed Moderate Resolution Imaging Spectroradiometer (MODIS)-based GVF on surface processes in the NCEP Noah land surface model. The largest differences between the GVF data set currently used by the Noah model and the new MODIS GVF data set occur in winter and for tree-dominated vegetation classes. The greatest impact of the new GVF data on the surface energy and water balance is seen during the summer, when the transpiration is increased by more than 10 W/m2 on average for most vegetation types and the July averaged daily transpiration rate is increased by up to 50 W/m2 for evergreen needleleaf sites.

Original languageEnglish (US)
Article numberL13404
JournalGeophysical Research Letters
Volume33
Issue number13
DOIs
StatePublished - Jul 2006

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MODIS (radiometry)
vegetation
MODIS
land surface
sensitivity
transpiration
water balance
leaf area index
surface energy
vegetation type
vegetation cover
energy balance
water budget
winter
summer
surface water

ASJC Scopus subject areas

  • Earth and Planetary Sciences (miscellaneous)

Cite this

Sensitivity of the NCEP/Noah land surface model to the MODIS green vegetation fraction data set. / Miller, Jesse; Barlage, Michael; Zeng, Xubin; Wei, Helin; Mitchell, Kenneth; Tarpley, Dan.

In: Geophysical Research Letters, Vol. 33, No. 13, L13404, 07.2006.

Research output: Contribution to journalArticle

Miller, Jesse ; Barlage, Michael ; Zeng, Xubin ; Wei, Helin ; Mitchell, Kenneth ; Tarpley, Dan. / Sensitivity of the NCEP/Noah land surface model to the MODIS green vegetation fraction data set. In: Geophysical Research Letters. 2006 ; Vol. 33, No. 13.
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