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A Spatial Resolution Threshold of Land Cover in Estimating Regional Terrestrial Carbon Sequestration : Volume 6, Issue 4 (05/08/2009)

By Zhao, S.

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Book Id: WPLBN0004005348
Format Type: PDF Article :
File Size: Pages 24
Reproduction Date: 2015

Title: A Spatial Resolution Threshold of Land Cover in Estimating Regional Terrestrial Carbon Sequestration : Volume 6, Issue 4 (05/08/2009)  
Author: Zhao, S.
Volume: Vol. 6, Issue 4
Language: English
Subject: Science, Biogeosciences, Discussions
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2009
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Li, Z., Sohl, T. L., Liu, S., & Zhao, S. (2009). A Spatial Resolution Threshold of Land Cover in Estimating Regional Terrestrial Carbon Sequestration : Volume 6, Issue 4 (05/08/2009). Retrieved from http://read.schoollibrary.com/


Description
Description: Arctic Slope Regional Corporation (ASRC) Research and Technology Solutions, Contractor to US Geological Survey (USGS) Earth Resources Observation and Science (EROS) Center, Sioux Falls, SD 57198, USA. Changes in carbon density (i.e., carbon stock per unit area) and land cover greatly affect carbon sequestration. Previous studies have shown that land cover change detection strongly depends on spatial scale. However, the influence of the spatial resolution of land cover change information on the estimated terrestrial carbon sequestration is not known. Here, we quantified and evaluated the impact of land cover change databases at various spatial resolutions (250 m, 500 m, 1 km, 2 km, and 4 km) on the magnitude and spatial patterns of regional carbon sequestration in the southeastern United States using the General Ensemble biogeochemical Modeling System (GEMS). Results indicated a threshold of 1 km in the land cover change databases and in the estimated regional terrestrial carbon sequestration. Beyond this threshold, significant biases occurred in the estimation of terrestrial carbon sequestration, its interannual variability, and spatial patterns. In addition, the overriding impact of interannual climate variability on the temporal change of regional carbon sequestration was unrealistically overshadowed by the impact of land cover change beyond the threshold. The implications of these findings directly challenge current continental- to global-scale carbon modeling efforts relying on information at coarse spatial resolution without incorporating fine-scale land cover dynamics.

Summary
A spatial resolution threshold of land cover in estimating regional terrestrial carbon sequestration

Excerpt
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