Storm-track variability prior to blocking: Mechanism and predictability
| Project/Area Number |
25800267
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Meteorology/Physical oceanography/Hydrology
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| Research Institution | Japan Agency for Marine-Earth Science and Technology |
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Principal Investigator |
YAMAZAKI Akira 国立研究開発法人海洋研究開発機構, アプリケーションラボ, 研究員 (20633887)
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| Research Collaborator |
INOUE Jun
ITOH Hisanori
NAOE Hiroaki
HONDA Meiji
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2015: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2013: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Keywords | ブロッキング / ストームトラック / アンサンブル予報 / 予測可能性変動 / 予測可能性 / 異常気象 / 大気力学 |
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| Outline of Final Research Achievements |
We investigated the relationships between the maintenance and predictability variations of blocking characterized by a pronounced meandering of the midlatitude westerly jet stream and an upstream storm track which is a frequent region of travelling highs and lows, via both diagnostic study of reanalysis data and weather forecast experiments. Through case study, we found that the maintenance of blocking is supported by the interaction with the storm track and predictability variation of the block maintenance is related to strength (efficiency) of the interaction.
We also investigated how error in the initial values for weather-forecast experiments existing at an extratropical region propagates by using the reanalysis data and a weather forecast model same as the above study. Results showed that the error propagate eastward from initial positions via the westerly jet stream in the upper troposphere.
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Report
(4 results)
Research Products
(55 results)
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[Presentation] AFES-LETKF experimental ensemble reanalysis 22013
Author(s)
Enomoto, T., A. Yamazaki, T. Miyoshi, A. Kuwano-Yoshida, N. Komori, J. Inoue, M. E. Hori, Q. Moteki, and S. Yamane
Organizer
Sixth WMO Symposium on Data Assimilation
Place of Presentation
University of Maryland, Maryland, USA
Related Report
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[Presentation] 北極海上のラジオゾンデ観測網の実験的強化計画
Author(s)
猪上淳, 堀正岳, 山崎哲, 榎本剛, Klaus Dethloff, Alexander Makshtas, Taneil Uttal
Organizer
日本気象学会2013年度春季大会
Place of Presentation
国立オリンピック記念青少年総合センター，東京都
Related Report
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