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Title: Atmospheric inversion of surface carbon flux with consideration of the spatial distribution of US crop production and consumption

Abstract

In order to improve quantification of the spatial distribution of carbon sinks and sources in the conterminous US, we conduct a nested global atmospheric inversion with detailed spatial information on crop production and consumption. County-level cropland net primary productivity, harvested biomass, soil carbon change, and human and livestock consumption data over the conterminous US are used for this purpose. Time-dependent Bayesian synthesis inversions are conducted based on CO₂ observations at 210 stations to infer CO₂ fluxes globally at monthly time steps with a nested focus on 30 regions in North America. Prior land surface carbon fluxes are first generated using a biospheric model, and the inversions are constrained using prior fluxes with and without adjustments for crop production and consumption over the 2002–2007 period. After these adjustments, the inverted regional carbon sink in the US Midwest increases from 0.25 ± 0.03 to 0.42 ± 0.13 Pg C yr⁻¹, whereas the large sink in the US southeast forest region is weakened from 0.41 ± 0.12 to 0.29 ± 0.12 Pg C yr⁻¹. These adjustments also reduce the inverted sink in the west region from 0.066 ± 0.04 to 0.040 ± 0.02 Pg C yr⁻¹ because of high crop consumption and respirationmore » by humans and livestock. The general pattern of sink increases in crop production areas and sink decreases (or source increases) in crop consumption areas highlights the importance of considering the lateral carbon transfer in crop products in atmospheric inverse modeling, which provides a reliable atmospheric perspective of the overall carbon balance at the continental scale but is unreliable for separating fluxes from different ecosystems.« less

Authors:
 [1];  [2];  [2];  [2];  [3]
  1. Nanjing Univ., Jiangsu (China); Univ. of Toronto, ON (Canada)
  2. Univ. of Toronto, ON (Canada)
  3. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1195621
Grant/Contract Number:
AC05-76RL01830
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Biogeosciences (Online)
Additional Journal Information:
Journal Name: Biogeosciences (Online); Journal Volume: 12; Journal Issue: 2; Journal ID: ISSN 1726-4189
Publisher:
European Geosciences Union
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES

Citation Formats

Chen, J. M., Fung, J. W., Mo, G., Deng, F., and West, T. O. Atmospheric inversion of surface carbon flux with consideration of the spatial distribution of US crop production and consumption. United States: N. p., 2015. Web. doi:10.5194/bg-12-323-2015.
Chen, J. M., Fung, J. W., Mo, G., Deng, F., & West, T. O. Atmospheric inversion of surface carbon flux with consideration of the spatial distribution of US crop production and consumption. United States. doi:10.5194/bg-12-323-2015.
Chen, J. M., Fung, J. W., Mo, G., Deng, F., and West, T. O. Mon . "Atmospheric inversion of surface carbon flux with consideration of the spatial distribution of US crop production and consumption". United States. doi:10.5194/bg-12-323-2015. https://www.osti.gov/servlets/purl/1195621.
@article{osti_1195621,
title = {Atmospheric inversion of surface carbon flux with consideration of the spatial distribution of US crop production and consumption},
author = {Chen, J. M. and Fung, J. W. and Mo, G. and Deng, F. and West, T. O.},
abstractNote = {In order to improve quantification of the spatial distribution of carbon sinks and sources in the conterminous US, we conduct a nested global atmospheric inversion with detailed spatial information on crop production and consumption. County-level cropland net primary productivity, harvested biomass, soil carbon change, and human and livestock consumption data over the conterminous US are used for this purpose. Time-dependent Bayesian synthesis inversions are conducted based on CO₂ observations at 210 stations to infer CO₂ fluxes globally at monthly time steps with a nested focus on 30 regions in North America. Prior land surface carbon fluxes are first generated using a biospheric model, and the inversions are constrained using prior fluxes with and without adjustments for crop production and consumption over the 2002–2007 period. After these adjustments, the inverted regional carbon sink in the US Midwest increases from 0.25 ± 0.03 to 0.42 ± 0.13 Pg C yr⁻¹, whereas the large sink in the US southeast forest region is weakened from 0.41 ± 0.12 to 0.29 ± 0.12 Pg C yr⁻¹. These adjustments also reduce the inverted sink in the west region from 0.066 ± 0.04 to 0.040 ± 0.02 Pg C yr⁻¹ because of high crop consumption and respiration by humans and livestock. The general pattern of sink increases in crop production areas and sink decreases (or source increases) in crop consumption areas highlights the importance of considering the lateral carbon transfer in crop products in atmospheric inverse modeling, which provides a reliable atmospheric perspective of the overall carbon balance at the continental scale but is unreliable for separating fluxes from different ecosystems.},
doi = {10.5194/bg-12-323-2015},
journal = {Biogeosciences (Online)},
number = 2,
volume = 12,
place = {United States},
year = {Mon Jan 19 00:00:00 EST 2015},
month = {Mon Jan 19 00:00:00 EST 2015}
}

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Cited by: 3 works
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