Actions for The Carbon Cycle Response to Two El Nino Types [electronic resource] : Observational Study

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The Carbon Cycle Response to Two El Nino Types [electronic resource] : Observational Study

Published
Washington, D.C. : United States. Dept. of Energy, 2017.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
Physical Description
Article numbers 024,001 : digital, PDF file
Additional Creators
Los Alamos National Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
Here, we analyze monthly tropical near surface air temperature and Mauna Loa Observatory carbon dioxide (CO2) data within 1960-2016 to identify different carbon cycle responses for two El Nino types: El Ninos originating in the central tropical Pacific (CP El Nino) and El Ninos originating in the eastern tropical Pacific (EP El Nino). We find significant differences between the two types of El Nino events with respect to time delay of the CO2 rise rate that follows the increase in tropical near surface air temperatures caused by El Nino events. The average time lag of the CP El Nino is 4.0±1.7 months, while the mean time lag of EP El Nino is found to be 8.5±2.3 months. The average lag of all considered 1960-2016 El Ninos is 5.2±2.7 months. In contrast the sensitivity of CO2 growth rate to tropical near surface air temperature increase is determined to be about the same for both El Nino types equal to 2.8±0.9 ppmyr-1K-1 (or 5.9±1.9 GtCyr-1K-1). Our results should be useful for the understanding of the carbon cycle and constraining it in climate models.
Report Numbers
E 1.99:la-ur--17-20233
la-ur--17-20233
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Note
Published through SciTech Connect.
11/22/2017.
"la-ur--17-20233"
Environmental Research Letters 13 2 ISSN 1748-9326 AM
Petr Chylek; Pieter Tans; John Christy; Manvendra Krishna Dubey.
Funding Information
AC52-06NA25396
View MARC record | catkey: 23774372