著者

飯島 慈裕 会田 健太郎 浅沼 順 石川 守 岩崎 博之 太田 岳史 小谷 亜由美 佐藤 友徳 篠田 雅人 杉浦 幸之助 朴 昊澤 檜山 哲哉 平沢 尚彦 金子 有紀 堀 雅裕 GOMBOLUUDEV Purevjav OYUNBAATAR Dambaravjaa IIJIMA Yoshihiro AIDA Kentaro ASANUMA Jun ISHIKAWA Mamoru IWASAKI Hiroyuki OHTA Takeshi KOTANI Ayumi SATO Tomonori SHINODA Masato SUGIURA Konosuke PARK Hotaek HIYAMA Tetsuya HIRASAWA Naohiko KANEKO Yuki HORI Masahiro

出版者

三重大学大学院生物資源学研究科

雑誌

三重大学大学院生物資源学研究科紀要

巻号頁・発行日

no.43, pp.15-25, 2017-09

---

宇宙航空研究開発機構によって2014年2月に打ち上げられた全球降水観測計画(GPM: Global Precipitation Measurement)の主衛星は高緯度地域の降水量が新規に得られる。このデータの検証は,今後の寒冷圏陸域の水循環・水資源研究等への利用促進に向けた観測精度の向上を図るうえで必要不可欠である。本研究プロジェクトでは,観測研究を実施してきた国内外の機関が協働して,北東ユーラシア(主としてモンゴル・東シベリア)で既設の観測システムを改良し,他の衛星データ解析と合わせて,夏季降水(降雨),冬季降水(降積雪)およびそれらの空間分布に関する地上検証を行う。また,今後の応用研究に向けて,陸面モデル・分布型河川流出モデル,メソ気象モデルを利用した,地域規模のGPM観測データの利用可能性を検討する。

著者

Sato Tomonori Tsujimura Maki Yamanaka Tsutomu Iwasaki Hiroyuki Sugimoto Atsuko Sugita Michiaki Kimura Fujio Davaa Gombo Oyunbaatar Dambaravjaa

出版者

American Geophysical Union

雑誌

Journal of geophysical research: Atmospheres (ISSN:2169897X)

巻号頁・発行日

vol.112, no.D17, pp.D17112, 2007-09

被引用文献数

48

---

Origin of water vapor, which falls as precipitation over arid/semiarid area in northeast Asia, is investigated by modeling and observational approaches. The regional climate model evaluates the spatiotemporal variations of precipitation and water vapor budget, which are used to drive the single-layer isotope circulation model. Intraseasonal variations of δ 18O in precipitation are well simulated during June-July-August of 2003. The δ 18O in water vapor experiences rapid decreases according to the passage of synoptic-scale disturbances. The rapid decreases of δ 18O are attributed to two processes. (1) The δ 18O in air mass locally decreases over the western mountains associated with the mountain precipitation; the light vapor is advected to eastern Mongolia by the prevailing westerly wind. (2) Convective systems pass by in the vicinity of the observation site, which persistently keep the lower δ 18O in the air mass. Origin of the water vapor during June-July-August in 2003 is evaluated by the colored moisture analysis in which the tracers are assigned depending on the region where the water vapor finally evaporated. Seasonal mean result indicates that the regions contributing to precipitation in Mongolia are not low-latitude regions but central Asia and western Siberia located to the northwest of Mongolia. Observed multilevel isotopic composition supports the model estimation. The moisture transport along the southwesterly wind of the Asian summer monsoon has difficulty reaching Mongolia as a monthly/seasonal mean perspective. However, eastern Mongolia and northeast China are situated on the border area between westerly wind moisture transport (by midlatitude synoptic cyclones) and southerly wind moisture transport (by Asian summer monsoon).