JpGU-AGU Joint Meeting 2017

講演情報

[EE] 口頭発表

セッション記号 M (領域外・複数領域) » M-GI 地球科学一般・情報地球科学

[M-GI28] [EE] Data assimilation: A fundamental approach in geosciences

2017年5月22日(月) 09:00 〜 10:30 301B (国際会議場 3F)

コンビーナ:中野 慎也(情報・システム研究機構 統計数理研究所)、藤井 陽介(気象庁気象研究所)、宮崎 真一(京都大学理学研究科)、三好 建正(理化学研究所計算科学研究機構)、座長:藤井 陽介(気象庁気象研究所)

10:00 〜 10:15

[MGI28-05] Utilization of fisherman-logging data for enhancement of the coastal ocean monitoring network in Japan

*宮澤 泰正1渡慶次 力2Varlamov Sergey1美山 透1日原 勉1郭 新宇3森岡 優志1 (1.海洋研究開発機構、2.宮崎県水産試験場、3.愛媛大学)

キーワード:data assimilation, ocean observing system, fisherman-CTD

An operational ocean observing system around Japan is mainly composed of satellite observation, ARGO floats, and repeated section surveys by central and local governmental research agencies. The data from the observing system are conveyed to operational ocean forecast systems based on data-assimilative ocean general circulation models in near real-time basis. Here we examine impacts of fisherman-logging Conductivity, Temperature, Depth sensor (FCTD) data on the ocean observing system using an operational ocean forecasting system JCOPE2. Additional assimilation of the FCTD data provided from Miyazaki prefectural fisheries research institute is effective for modifying representation of oceanic conditions for a period from April to August 2016 in nearshore region southeast of the Kyushu Island. The Kuroshio front position averaged for the period moves to nearshore side as observed by the additional assimilation. In particular, the FCTD assimilation leads to finer representation of a subsurface warm water tongue varying with a few days time scale, which is never detected by the satellite remote sensing and existing in-situ monitoring data, demonstrating a potential key role of FCTD for enhancement of the coastal ocean monitoring network in Japan.