GCM Bias of the Western Pacific Summer Monsoon and Its Correction by Two-Way Nesting System

• INATSU Masaru

  Graduate School of Science, Hokkaido University

• SATAKE Yuya

  Graduate School of Science, Hokkaido University

• KIMOTO Masahide

  Atmosphere and Ocean Research Institute, The University of Tokyo

• YASUTOMI Natsuko

  Research Institute for Humanity and Nature

Abstract

Accurate simulation of summertime convection associated with the Asian monsoon trough over the subtropical western Pacific is important but diffcult to achieve in many general circulation models (GCMs). This study reports a case in which bias could be reduced by introducing a higher-resolution regional atmospheric model (RAM), two-way nested in an atmospheric GCM over the western Pacific. Additional partial-coupling experiments revealed that GCM bias correction was insensitive to the coupling domain. The two-way nesting effect was similar to one phase of a leading mode of natural variability in the system. This is indicative that the two-way nesting model provides more realistic tropical heating that effectively excites a correct phase of the intrinsic dynamical mode to reduce GCM bias.

Journal

• Journal of the Meteorological Society of Japan. Ser. II

  Journal of the Meteorological Society of Japan. Ser. II 90B (0), 1-10, 2012

  Meteorological Society of Japan

Keywords

• Atmospheric Science

Details

• CRID: 1390001206503537152
• NII Article ID: 130004435203
• NII Article ID: 120005228618
• NII Book ID: AA00702524
• DOI: 10.2151/jmsj.2012-b01
• ISSN: 21869057
• ISSN: 00261165
• HANDLE: 2115/52670
• NDL BIB ID: 023556258
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I023556258
• Web Site: https://www.jstage.jst.go.jp/article/jmsj/90B/0/90B_2012-B01/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • IRDB
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed