| Tropical mid-tropospheric CO2 variability driven by the Madden-Julian oscillation. | |
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MedLine Citation:
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PMID: 20978207 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Carbon dioxide (CO(2)) is the most important anthropogenic greenhouse gas in the present-day climate. Most of the community focuses on its long-term (decadal to centennial) behaviors that are relevant to climate change, but there are relatively few discussions of its higher-frequency forms of variability, and none regarding its subseasonal distribution. In this work, we report a large-scale intraseasonal variation in the Atmospheric Infrared Sounder CO(2) data in the global tropical region associated with the Madden-Julian oscillation (MJO). The peak-to-peak amplitude of the composite MJO modulation is ∼1 ppmv, with a standard error of the composite mean < 0.1 ppmv. The correlation structure between CO(2) and rainfall and vertical velocity indicate positive (negative) anomalies in CO(2) arise due to upward (downward) large-scale vertical motions in the lower troposphere associated with the MJO. These findings can help elucidate how faster processes can organize, transport, and mix CO(2) and provide a robustness test for coupled carbon-climate models. |
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Authors:
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King-Fai Li; Baijun Tian; Duane E Waliser; Yuk L Yung |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S. Date: 2010-10-26 |
Journal Detail:
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Title: Proceedings of the National Academy of Sciences of the United States of America Volume: 107 ISSN: 1091-6490 ISO Abbreviation: Proc. Natl. Acad. Sci. U.S.A. Publication Date: 2010 Nov |
Date Detail:
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Created Date: 2010-11-10 Completed Date: 2010-12-30 Revised Date: 2011-07-28 |
Medline Journal Info:
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Nlm Unique ID: 7505876 Medline TA: Proc Natl Acad Sci U S A Country: United States |
Other Details:
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Languages: eng Pagination: 19171-5 Citation Subset: IM |
Affiliation:
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Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125, USA. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Atmosphere
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analysis* Carbon Dioxide / analysis* Gases Greenhouse Effect Seasons Tropical Climate* |
| Chemical | |
Reg. No./Substance:
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0/Gases; 124-38-9/Carbon Dioxide |
| Comments/Corrections | |
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