Feedbacks of Vegetation on Summertime Climate Variability over the North American Grasslands. Part I: Statistical Analysis
نویسندگان
چکیده
Feedbacks of vegetation on summertime climate variability over the North American Grasslands are analyzed using the statistical technique of Granger causality. Results indicate that normalized difference vegetation index (NDVI) anomalies early in the growing season have a statistically measurable effect on precipitation and surface temperature later in summer. In particular, higher means and/or decreasing trends of NDVI anomalies tend to * Corresponding author address: Weile Wang, Department of Geography and Environment, Boston University, 675 Commonwealth Ave., Boston, MA 02215. E-mail address: [email protected] Earth Interactions • Volume 10 (2006) • Paper No. 17 • Page 1
منابع مشابه
Feedbacks of Vegetation on Summertime Climate Variability over the North American Grasslands. Part II: A Coupled Stochastic Model
A coupled linear model is derived to describe interactions between anomalous precipitation and vegetation over the North American Grasslands. The model is based on biohydrological characteristics in the semiarid environment and has components to describe the water-related vegetation variability, the long-term balance of soil moisture, and the local soil–moisture– precipitation feedbacks. Analys...
متن کاملFeedbacks of Vegetation on Summertime Climate Variability over the North American Grasslands: 1. Statistical Analysis
Weile Wang Department of Geography and Environment, Boston University, Boston, MA E-mail: [email protected] Bruce T. Anderson Department of Geography and Environment, Boston University, Boston, MA E-mail: [email protected] Nathan Phillips Department of Geography and Environment, Boston University, Boston, MA E-mail: [email protected] Robert K. Kaufmann Department of Geography and Environment, Boston Univer...
متن کاملBOSTON UNIVERSITY GRADUATE SCHOOL OF ARTS AND SCIENCES Dissertation DETECTING AND MODELING LARGE-SCALE INTERACTIONS BETWEEN VEGETATION, PRECIPITATION, AND TEMPERATURE OVER TEMPERATE-SEMIARID AND BOREAL CLIMATE REGIMES
Terrestrial vegetation exerts an important influence on climate variability via the exchange of mass, energy, and momentum between the land surface and the atmosphere. This dissertation uses statistical techniques and stochastic models to investigate largescale vegetation/climate interactions in remotely-sensed vegetation datasets and observational climate records. Vegetation feedbacks on clima...
متن کاملDetecting vegetation-precipitation feedbacks in mid-Holocene North Africa from two climate models
Using two climate-vegetation model simulations from the Fast Ocean Atmosphere Model (FOAM) and the Community Climate System Model (CCSM, version 2), we investigate vegetation-precipitation feedbacks across North Africa during the mid-Holocene. From mid-Holocene snapshot runs of FOAM and CCSM2, we detect a negative feedback at the annual timescale with our statistical analysis. Using the Monte-C...
متن کاملInterannual variability in net primary production and precipitation.
Primary Production and Precipitation Knapp and Smith (1) suggested that interannual variability in aboveground net primary production (ANPP) is not related to fluctuations in precipitation, based on analysis of data from 11 Long-Term Ecological Research sites across North America. This finding, if applicable to other regions, is crucial to climate change research, because it may necessitate rev...
متن کامل