Title: Ecosystem biophysical memory in the Southwestern North America climate system
Authors: FORZIERI GIOVANNIVIVONI ENRIQUE R.FEYEN LUC
Citation: ENVIRONMENTAL RESEARCH LETTERS vol. 8 no. 4 p. 004016
Publisher: IOP PUBLISHING LTD
Publication Year: 2013
JRC N°: JRC84970
ISSN: 1748-9326
URI: http://iopscience.iop.org/1748-9326/8/4/044016/
http://publications.jrc.ec.europa.eu/repository/handle/JRC84970
DOI: 10.1088/1748-9326/8/4/044016
Type: Articles in periodicals and books
Abstract: To elucidate the potential role of vegetation to act as a memory source in the southwestern North America climate system, we explore correlation structures of remotely-sensed vegetation dynamics with precipitation, temperature and teleconnection indices over 1982-2006 for six ecoregions. We found that lagged correlations between vegetation dynamics and climate variables are modulated by the dominance of monsoonal or Mediterranean regimes and ecosystem-specific physiological processes. Subtropical and tropical ecosystems exhibit a 1-month lag positive correlation with precipitation, a 0- to 1-month lag negative correlation with temperature, and modest negative effects of sea surface temperature (SST). Mountain forests have a 0 month lag negative correlation with precipitation, a 0-1 month lag negative correlation with temperature, and no significant correlation with SSTs. Deserts show a strong 1-4 month lag positive correlation with precipitation, a low 0-2 month lag negative correlation with temperature, and a high 4-8 month lag positive correlation with SSTs. The ecoregion-specific biophysical memories identified offer an opportunity to improve the predictability of land-atmosphere interactions and vegetation feedbacks onto climate.
JRC Directorate:Sustainable Resources

Files in This Item:
There are no files associated with this item.


Items in repository are protected by copyright, with all rights reserved, unless otherwise indicated.