Cover Journal of Hydrometeorology
Journal of Hydrometeorology

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Article Type:
Research Article

Global Vegetation Root Distribution for Land Modeling

Xubin Zeng1
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  • 1 Institute of Atmospheric Physics, The University of Arizona, Tucson, Arizona
Print Publication:
01 Oct 2001
DOI:
https://doi.org/10.1175/1525-7541(2001)002<0525:GVRDFL>2.0.CO;2
Page(s):
525–530
Restricted access

Abstract

Vegetation root distribution is one of the factors that determine the overall water holding capacity of the land surface and the relative rates of water extraction from different soil layers for vegetation transpiration. Despite its importance, significantly different root distributions are used by different land surface models. Using a comprehensive global field survey dataset, vegetation root distribution (including rooting depth) has been developed here for three of the most widely used land cover classifications [i.e., the Biosphere–Atmosphere Transfer Scheme (BATS), International Geosphere–Biosphere Program (IGBP), and version 2 of the Simple Biosphere Model (SiB2)] for direct use by any land model with any number of soil layers.

Corresponding author address: Xubin Zeng, Institute of Atmospheric Physics, The University of Arizona, P.O. Box 210081, Tucson, AZ 85721. Email: xubin@atmo.arizona.edu

Abstract

Vegetation root distribution is one of the factors that determine the overall water holding capacity of the land surface and the relative rates of water extraction from different soil layers for vegetation transpiration. Despite its importance, significantly different root distributions are used by different land surface models. Using a comprehensive global field survey dataset, vegetation root distribution (including rooting depth) has been developed here for three of the most widely used land cover classifications [i.e., the Biosphere–Atmosphere Transfer Scheme (BATS), International Geosphere–Biosphere Program (IGBP), and version 2 of the Simple Biosphere Model (SiB2)] for direct use by any land model with any number of soil layers.

Corresponding author address: Xubin Zeng, Institute of Atmospheric Physics, The University of Arizona, P.O. Box 210081, Tucson, AZ 85721. Email: xubin@atmo.arizona.edu

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