Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 14-Day Trial for You or Your Team.

Learn More →

A Representation of Variable Root Distribution in Dynamic Vegetation Models

A Representation of Variable Root Distribution in Dynamic Vegetation Models Root distribution is treated as a static component in most current dynamic vegetation models (DVMs). While changes in leaf and stem biomass are reflected in leaf area index (LAI) and vegetation height via specific leaf area (SLA) and allometric relationships, most DVMs assume that changes in root biomass do not result in changes in the root distribution profile and rooting depth. That is, the fraction of roots in soil layers, which is used to estimate transpiration, is taken to be constant and independent of root biomass and/or vegetation age. A methodology for parameterizing root distribution as a function of root biomass is proposed for use in dynamic vegetation models. In this representation, root distribution and rooting depth evolve and increase as root biomass increases, as is expected intuitively and as is seen in observations. Root biomass data from temperate coniferous, tropical evergreen, and tundra sites show that the approach successfully represents, to the first order, the change of root distribution and rooting depth as a function of root biomass. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Earth Interactions American Meteorological Society

A Representation of Variable Root Distribution in Dynamic Vegetation Models

Earth Interactions , Volume 7 (6) – Feb 14, 2003

Loading next page...
 
/lp/american-meteorological-society/a-representation-of-variable-root-distribution-in-dynamic-vegetation-Ndkzac0cqA

References

References for this paper are not available at this time. We will be adding them shortly, thank you for your patience.

Publisher
American Meteorological Society
Copyright
Copyright © 2003 American Meteorological Society
ISSN
1087-3562
DOI
10.1175/1087-3562(2003)007<0001:AROVRD>2.0.CO;2
Publisher site
See Article on Publisher Site

Abstract

Root distribution is treated as a static component in most current dynamic vegetation models (DVMs). While changes in leaf and stem biomass are reflected in leaf area index (LAI) and vegetation height via specific leaf area (SLA) and allometric relationships, most DVMs assume that changes in root biomass do not result in changes in the root distribution profile and rooting depth. That is, the fraction of roots in soil layers, which is used to estimate transpiration, is taken to be constant and independent of root biomass and/or vegetation age. A methodology for parameterizing root distribution as a function of root biomass is proposed for use in dynamic vegetation models. In this representation, root distribution and rooting depth evolve and increase as root biomass increases, as is expected intuitively and as is seen in observations. Root biomass data from temperate coniferous, tropical evergreen, and tundra sites show that the approach successfully represents, to the first order, the change of root distribution and rooting depth as a function of root biomass.

Journal

Earth InteractionsAmerican Meteorological Society

Published: Feb 14, 2003

There are no references for this article.