JpGU-AGU Joint Meeting 2017

Presentation information

[EE] Oral

M (Multidisciplinary and Interdisciplinary) » M-IS Intersection

[M-IS03] [EE] Future Earth - Implementing Integrated Research for Sustainable Future

Sat. May 20, 2017 9:00 AM - 10:30 AM 201A (International Conference Hall 2F)

convener:Yukio Himiyama(Emeritus Professor, Hokkaido University of Education), Yoshio Takahashi(Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo), Makoto Taniguchi(Research Institute for Humanity and Nature), Fumiko KASUGA(National Institute for Environmental Studies), Chairperson:yukio himiyama(Emeritus Professor, Hokkaido University of Education), Chairperson:makoto taniguchi(Research Institute for Humanity and Nature)

10:15 AM - 10:30 AM

[MIS03-06] Rapid seasonal migration of the heavy precipitation region in the Southeast Asia and its relation to the Madden-Julian Oscillation

★Invited papers

*Hiroaki Miura1 (1.Graduate School of Science, The University of Tokyo)

Keywords:monsoon, atmosphere-ocean coupling, Year of the Maritime Continent (YMC)

It is known that the region of a large variance of the intraseasonal component of precipitation migrates from the Indian Ocean to the western Pacific in late November. The reliable prediction and the understanding of this rapid migration in the intraseasonal time scale are not only useful for managing water resources in the Southeast Asia but also important to prevent disasters due to strong convective activity and heavy precipitation. The ensemble hindcasts using a high-resolution atmospheric model are performed to investigate this rapid migration in late November 2012. It is found that the seasonal change of sea surface temperature in the maritime continents is an important reason for the southeastward shift of the precipitation region. This change also appears to increase the change of the consistent eastward movement of the convective acidity of the Madden-Julian Oscillation (MJO). The observation campaign named as Year of the Maritime Continent, which is starting this year, is expected to be helpful for improving our understanding between the seasonal shift and the MJO.