Study on the ocean observing system evaluation using quasi-coupled data assimilation and breeding methods

2015 Fiscal Year Final Research Report

• Project/Area Number: 24740324
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Meteorology/Physical oceanography/Hydrology
• Research Institution: Japan, Meteorological Research Institute
• Principal Investigator: Fujii Yosuke 気象庁気象研究所, 海洋地球化学研究部, 主任研究官 (60343894)
• Co-Investigator(Renkei-kenkyūsha): OGAWA Koji 気象庁気象研究所, 海洋・地球化学研究部, 研究官 (30586706)
• Research Collaborator: BALMASEDA Magdalena ; OKE Peter ; Xue Yan
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: データ同化 / 観測システム評価 / アルゴフロート / TAO/TRITON / エルニーニョ

Outline of Final Research Achievements

(1) This study clarified effects of observation data on ocean data assimilation results for some specific areas. For example, TAO/TRITON buoy data have large impacts in the western equatorial Pacific.
(2) This study clarified effects of observation data on El Nino forecasts using ocean data assimilation systems. For example, TAO/TRITON buoy data improves the accuracy by 3-7% and the effects increase with the lead time of the forecasts.
(3) This study clarified that the reduction of TAO/TRITON buoy data after 2012 affects El Nino forecasts by operational centers through intercomparison of operational analysis fields, and summarized results of researches on the importance of TAO/TRITON buoy data.

Free Research Field

海洋物理・データ同化