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Contrasting Regional Carbon Cycle Responses to Seasonal Climate Anomalies Across the East‐West Divide of Temperate North America

Byrne, B. and Liu, J. and Bloom, A. A. and Bowman, K. W. and Butterfield, Z. and Joiner, J. and Keenan, T. F. and Keppel-Aleks, G. and Parazoo, N. C. and Yin, Y. (2020) Contrasting Regional Carbon Cycle Responses to Seasonal Climate Anomalies Across the East‐West Divide of Temperate North America. Global Biogeochemical Cycles, 34 (11). Art. No. e2020GB006598. ISSN 0886-6236.

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Across temperate North America, interannual variability (IAV) in gross primary production (GPP) and net ecosystem exchange (NEE) and their relationship with environmental drivers are poorly understood. Here, we examine IAV in GPP and NEE and their relationship to environmental drivers using two state‐of‐the‐science flux products: NEE constrained by surface and space‐based atmospheric CO2 measurements over 2010–2015 and satellite up‐scaled GPP from FluxSat over 2001–2017. We show that the arid western half of temperate North America provides a larger contribution to IAV in GPP (104% of east) and NEE (127% of east) than the eastern half, in spite of smaller magnitude of annual mean GPP and NEE. This occurs because anomalies in western ecosystems are temporally coherent across the growing season leading to an amplification of GPP and NEE. In contrast, IAV in GPP and NEE in eastern ecosystems is dominated by seasonal compensation effects, associated with opposite responses to temperature anomalies in spring and summer. Terrestrial biosphere models in the MsTMIP ensemble generally capture these differences between eastern and western temperate North America, although there is considerable spread between models.

Item Type:Article
Related URLs:
URLURL TypeDescription ItemMulti-scale synthesis and Terrestrial Model Intercomparison Project
http://daac.ornl.govRelated ItemORNL DAAC
https://cmsflux.jpl.nasa.govRelated ItemCMS-Flux
http://carbontracker.noaa.govRelated ItemCarbonTracker CT2019
https://atmosphere.copernicus.euRelated ItemCAMS NEE fluxes
https://fluxnet.orgRelated ItemFLUXNET 2015 data Paper
Byrne, B.0000-0003-0619-3045
Liu, J.0000-0002-7184-6594
Bloom, A. A.0000-0002-1486-1499
Bowman, K. W.0000-0002-8659-1117
Joiner, J.0000-0003-4278-1020
Keenan, T. F.0000-0002-3347-0258
Keppel-Aleks, G.0000-0003-2213-0044
Parazoo, N. C.0000-0002-4424-7780
Yin, Y.0000-0003-4750-4997
Additional Information:© 2020 The Authors. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. Issue Online: 13 November 2020; Version of Record online: 13 November 2020; Accepted manuscript online: 17 October 2020; Manuscript accepted: 11 October 2020; Manuscript revised: 20 August 2020; Manuscript received: 05 March 2020. B. B. was supported by an appointment to the NASA Postdoctoral Program at the Jet Propulsion Laboratory, administered by Universities Space Research Association under contract with NASA. J. L. was supported by the NASA OCO2/3 science team program NNH17ZDA001N‐OCO2. J. J. was supported by NASA through the Earth Science U.S. Participating Investigator and Making Earth Science Data Records for Use in Research Environments (MEaSUREs) programs. T. F. K. was supported by the NASA Terrestrial Ecology Program IDS Award NNH17AE86I. Resources supporting this work were provided by the NASA High‐End Computing (HEC) Program through the NASA Advanced Supercomputing (NAS) Division at Ames Research Center. Funding for the Multi‐scale synthesis and Terrestrial Model Intercomparison Project (MsTMIP; activity was provided through NASA ROSES Grant #NNX10AG01A. Data management support for preparing, documenting, and distributing model driver and output data was performed by the Modeling and Synthesis Thematic Data Center at Oak Ridge National Laboratory (ORNL;, with funding thorugh NASA ROSES Grant #NNH10AN681. Finalized MsTMIP data products are archived at the ORNL DAAC ( The research was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration (80NM0018D004). The eddy covariance sites examined in this study are supported by the DOE Ameriflux Network Management Project. Data Availability Statement: Posterior NEE fluxes from Byrne et al. (2020) were downloaded online (from CarbonTracker CT2017 results are provided by NOAA ESRL, Boulder, Colorado, USA (from the website CarbonTracker Lagrange NEE fluxes were downloaded online (from‐5c37). CAMS NEE fluxes were obtained online (from FLUXNET2015 data were obtained from the FLUXNET website (
Funding AgencyGrant Number
NASA Postdoctoral ProgramUNSPECIFIED
Subject Keywords:Carbon Cycle; Interannual Variability; North America; Terrestrial Biosphere Model; Net ecosystem exchange; Gross Primary Production
Issue or Number:11
Record Number:CaltechAUTHORS:20201021-124416963
Persistent URL:
Official Citation:Byrne, B., Liu, J., Bloom, A. A., Bowman, K. W., Butterfield, Z., Joiner, J., et al. (2020). Contrasting regional carbon cycle responses to seasonal climate anomalies across the east‐west divide of temperate North America. Global Biogeochemical Cycles, 34, e2020GB006598.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:106187
Deposited By: Tony Diaz
Deposited On:21 Oct 2020 20:59
Last Modified:24 Nov 2020 17:50

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