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Title: Global Patterns of CO2 Emissions from Soils on a 0.5 Degree Grid Cell Basis

Abstract

We use semi-mechanistic, empirically based statistical models to predict the spatial and temporal patterns of global carbon dioxide emissions from terrestrial soils. Emissions include the respiration of both soil organisms and plant roots. At the global scale, rates of soil CO2 efflux correlate significantly with temperature and precipitation; they do not correlate well with soil carbon pools, soil nitrogen pools, or soil C:N. Wetlands cover about 3% of the land area but diminish predicted CO2 emissions by only about 1%. The estimated annual flux of CO2 from soils to the atmosphere is estimated to be 76.5 Pg C yr-1, 1-9 Pg greater than previous global estimates, and 30-60% greater than terrestrial net primary productivity. Historic land cover changes are estimated to have reduced current annual soil CO2 emissions by 0.2-2.0 Pg C yr-1 in comparison with an undisturbed vegetation cover. Soil CO2 fluxes have a pronounced seasonal pattern in most locations, with maximum emissions coinciding with periods of active plant growth. Our models suggest that soils produce CO2 throughout the year and thereby contribute to the observed wintertime increases in atmospheric CO2 concentrations. Our derivation of statistically based estimates of soil CO2 emissions at a 0.5-degree latitude-by-longitude spatial and monthlymore » temporal resolution represents the best-resolved estimate to date of global CO2 fluxes from soils and should facilitate investigations of net carbon exchanges between the atmosphere and terrestrial biosphere.« less

Authors:
;
  1. Iowa State University, Dept. of Botany
  2. NASA Ames Research Center
Publication Date:
Other Number(s):
cdiac:doi 10.3334/CDIAC/lue.db1015
Research Org.:
Environmental System Science Data Infrastructure for a Virtual Ecosystem (ESS-DIVE) (United States)
Collaborations:
Carbon Dioxide Information Analysis Center (CDIAC)
Subject:
54 ENVIRONMENTAL SCIENCES
Keywords:
CO2; Carbon Dioxide; Emissions; Microbes; Respiration; Roots; Soil; Carbon Release; Climate Change; Global Patterns; CO2 flux (100g C/m2); land; lsea
Geolocation:
90.0,180.0|-90.0,180.0|-90.0,-180.0|90.0,-180.0|90.0,180.0
OSTI Identifier:
1389494
DOI:
https://doi.org/10.3334/CDIAC/LUE.DB1015
Project Location:


Citation Formats

Raich, J. W., and Potter, C. S. Global Patterns of CO2 Emissions from Soils on a 0.5 Degree Grid Cell Basis. United States: N. p., 1996. Web. doi:10.3334/CDIAC/LUE.DB1015.
Raich, J. W., & Potter, C. S. Global Patterns of CO2 Emissions from Soils on a 0.5 Degree Grid Cell Basis. United States. doi:https://doi.org/10.3334/CDIAC/LUE.DB1015
Raich, J. W., and Potter, C. S. 1996. "Global Patterns of CO2 Emissions from Soils on a 0.5 Degree Grid Cell Basis". United States. doi:https://doi.org/10.3334/CDIAC/LUE.DB1015. https://www.osti.gov/servlets/purl/1389494. Pub date:Fri Mar 01 00:00:00 EST 1996
@article{osti_1389494,
title = {Global Patterns of CO2 Emissions from Soils on a 0.5 Degree Grid Cell Basis},
author = {Raich, J. W. and Potter, C. S.},
abstractNote = {We use semi-mechanistic, empirically based statistical models to predict the spatial and temporal patterns of global carbon dioxide emissions from terrestrial soils. Emissions include the respiration of both soil organisms and plant roots. At the global scale, rates of soil CO2 efflux correlate significantly with temperature and precipitation; they do not correlate well with soil carbon pools, soil nitrogen pools, or soil C:N. Wetlands cover about 3% of the land area but diminish predicted CO2 emissions by only about 1%. The estimated annual flux of CO2 from soils to the atmosphere is estimated to be 76.5 Pg C yr-1, 1-9 Pg greater than previous global estimates, and 30-60% greater than terrestrial net primary productivity. Historic land cover changes are estimated to have reduced current annual soil CO2 emissions by 0.2-2.0 Pg C yr-1 in comparison with an undisturbed vegetation cover. Soil CO2 fluxes have a pronounced seasonal pattern in most locations, with maximum emissions coinciding with periods of active plant growth. Our models suggest that soils produce CO2 throughout the year and thereby contribute to the observed wintertime increases in atmospheric CO2 concentrations. Our derivation of statistically based estimates of soil CO2 emissions at a 0.5-degree latitude-by-longitude spatial and monthly temporal resolution represents the best-resolved estimate to date of global CO2 fluxes from soils and should facilitate investigations of net carbon exchanges between the atmosphere and terrestrial biosphere.},
doi = {10.3334/CDIAC/LUE.DB1015},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Mar 01 00:00:00 EST 1996},
month = {Fri Mar 01 00:00:00 EST 1996}
}