ETIN-MIP Extratropical-Tropical Interaction Model Intercomparison Project – protocol and initial results

Article


Kang, Sarah M., Hawcroft, Matt, Xiang, Baoqiang, Hwang, Yen-Ting, Cazes, Gabriel, Codron, Francis, Crueger, Traute, Deser, Clara, Hodnebrog, Oivind, Kim, Hanjun, Kim, Jiyeong, Kosaka, Yu, Losada, Teresa, Mechoso, Carlos R., Myhre, Gunnar, Seland, Oyvind, Stevens, Bjorn, Watanabe, Masahiro and Yu, Sungduk. 2019. "ETIN-MIP Extratropical-Tropical Interaction Model Intercomparison Project – protocol and initial results." Bulletin of the American Meteorological Society. 100 (12), pp. 2589-2606. https://doi.org/10.1175/BAMS-D-18-0301.1
Article Title

ETIN-MIP Extratropical-Tropical Interaction Model Intercomparison Project – protocol and initial results

ERA Journal ID1961
Article CategoryArticle
AuthorsKang, Sarah M. (Author), Hawcroft, Matt (Author), Xiang, Baoqiang (Author), Hwang, Yen-Ting (Author), Cazes, Gabriel (Author), Codron, Francis (Author), Crueger, Traute (Author), Deser, Clara (Author), Hodnebrog, Oivind (Author), Kim, Hanjun (Author), Kim, Jiyeong (Author), Kosaka, Yu (Author), Losada, Teresa (Author), Mechoso, Carlos R. (Author), Myhre, Gunnar (Author), Seland, Oyvind (Author), Stevens, Bjorn (Author), Watanabe, Masahiro (Author) and Yu, Sungduk (Author)
Journal TitleBulletin of the American Meteorological Society
Journal Citation100 (12), pp. 2589-2606
Number of Pages40
Year2019
PublisherAmerican Meteorological Society
Place of PublicationUnited States
ISSN0003-0007
1520-0477
Digital Object Identifier (DOI)https://doi.org/10.1175/BAMS-D-18-0301.1
Web Address (URL)https://journals.ametsoc.org/view/journals/bams/100/12/bams-d-18-0301.1.xml?tab_body=supplementary-materials
Abstract

ETIN-MIP is a community-wide effort to improve dynamical understanding of the linkages between tropical precipitation and radiative biases in various regions, with implications for anthropogenic climate change and geoengineering.

This article introduces the Extratropical-Tropical Interaction Model Intercomparison Project (ETIN-MIP), where a set of fully coupled model experiments are designed to examine the sources of longstanding tropical precipitation biases in climate models. In particular, we reduce insolation over three targeted latitudinal bands of persistent model biases: the southern extratropics, the southern tropics and the northern extratropics. To address the effect of regional energy bias corrections on the mean distribution of tropical precipitation, such as the double Intertropical Convergence Zone problem, we evaluate the quasi-equilibrium response of the climate system corresponding to a 50-year period after the 100 years of prescribed energy perturbation. Initial results show that, despite a large inter-model spread in each perturbation experiment due to differences in ocean heat uptake response and climate feedbacks across models, the southern tropics is most efficient at driving a meridional shift of tropical precipitation. In contrast, the extratropical energy perturbations are effectively damped by anomalous heat uptake over the subpolar oceans, thereby inducing a smaller meridional shift of tropical precipitation compared with the tropical energy perturbations. The ETIN-MIP experiments allow us to investigate the global implications of regional energy bias corrections, providing a route to guide the practice of model development, with implications for understanding dynamical responses to anthropogenic climate change and geoengineering.

KeywordsETIN-MIP; Extratropical-Tropical Interaction Model Intercomparison Project; tropical precipitation; radiative biases; climate models
Contains Sensitive ContentDoes not contain sensitive content
ANZSRC Field of Research 2020370108. Meteorology
370202. Climatology
Public Notes

File reproduced in accordance with the copyright policy of the publisher/author.

Institution of OriginUniversity of Southern Queensland
Byline AffiliationsUlsan National Institute of Science and Technology, Korea
Centre for Applied Climate Sciences
National Oceanic and Atmospheric Administration, United States
National Taiwan University, Taiwan
University of the Republic, Uruguay
Sorbonne University, France
Max Planck Society, Germany
National Center for Atmospheric Research, United States
Centre for International Climate and Environmental Research, Norway
University of Tokyo, Japan
Complutense University of Madrid, Spain
University of California, United States
Center for International Climate Research, Norway
Norwegian Meteorological Institute, Norway
Yale University, United States
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