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Does drier land surface intensify rainfall? Understanding of water vapor transport

Research Project

Project/Area Number 19H01375
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 04010:Geography-related
Research InstitutionTokyo Metropolitan University

Principal Investigator

Takahashi Hiroshi  東京都立大学, 都市環境科学研究科, 助教 (50397478)

Co-Investigator(Kenkyū-buntansha) 藤波 初木  名古屋大学, 宇宙地球環境研究所, 講師 (60402559)
櫻井 南海子  国立研究開発法人防災科学技術研究所, 水・土砂防災研究部門, 主任研究員 (30435846)
杉本 志織  国立研究開発法人海洋研究開発機構, 地球環境部門(環境変動予測研究センター), 研究員 (90632076)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥16,640,000 (Direct Cost: ¥12,800,000、Indirect Cost: ¥3,840,000)
Fiscal Year 2021: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2020: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2019: ¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Keywords降水特性 / 水蒸気輸送 / アジアモンスーン / 気候変動 / 梅雨 / 地形性降雨 / 水蒸気変動 / 豪雨・豪雪 / 大気擾乱 / 地表面改変 / 地表面改変と降水特性の変化 / 豪雨に関わる水蒸気輸送の多層構造 / 高解像度気象気候シミュレーション / 多様な気候下での大気陸面相互作用と境界層 / アジアモンスーン地域の都市豪雨(ゲリラ豪雨)
Outline of Research at the Start

都市化・森林伐採・耕作地化などによって、雨の降り方はどのように変わるのか?この問いに答えるためには、雲がどのような条件で良く発達するのかを理解する必要がある。都市化・森林伐採(植林)では、蒸発が減り(増え)、気温が上がる(下がる)。蒸発による水蒸気増加・気温上昇は、どちらも深い対流のエネルギー源となりうる。これが問いを難しくしている。本研究では、地表面状態の変化による降水システムなどへの影響を明らかにするために、マルチスケールの水蒸気輸送・土地利用変化による降水システムとその水蒸気輸送への影響を、観測と数値実験から調べる。

Outline of Final Research Achievements

We investigated the water vapor transports associated with (heavy) rain events on multiple spatial scales, focusing on topographic effects and the impact of land-surface conditions. One significant new finding is that the rain activity associated with the Baiu/Meiyu front has been enhanced during the latest 11 years, which was revealed from the long-term satellite observational data. Also, we examined the impact of land-surface changes, including deforestation and urbanization, which was difficult to reach conclusions because of the small S/N ratio. A dried surface may enhance the rain, but it depends on regions and seasons. Another important new finding is that both the observational and numerical simulation approaches have proposed the climatological feature of the diurnal precipitation variations over the Southern slope of the Himalayas. To understand the impact of land-surface conditions, we examine the observational datasets more carefully. We will continue to study this topic.

Academic Significance and Societal Importance of the Research Achievements

アジア地域での降水とそれに関わる様々な空間スケールの水蒸気輸送について、地形や地表面影響にも注目しながら調べた。最近10年間の梅雨期の豪雨の頻発を衛星観測データから明らかにし、熱帯低気圧活動の変化に起因する水蒸気輸送とも関連付けた。ヒマラヤ南斜面の日変化降水については、現地観測と高解像度実験より明らかに、気候学的な描像を提示した。観測とシミュレーションから、都市化などの地表面の乾燥化は、降水強度を変化させるが、必ずしも豪雨を増やすわけではなかった。よって、それら変化は地域や季節により異なり複雑であるため、地形や地表面状態に関連した降水強度の変化と関連した水蒸気変動のさらなる研究が必要である。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • Research Products

    (36 results)

All 2021 2020 2019 Other

All Journal Article (8 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 7 results,  Open Access: 7 results) Presentation (20 results) (of which Int'l Joint Research: 11 results) Remarks (8 results)

  • [Journal Article] Recent decadal enhancement of Meiyu-Baiu heavy rainfall over East Asia.2021

    • Author(s)
      Takahashi, H. G. and Fujinami, H.
    • Journal Title

      Scientific Reports

      Volume: 11 Issue: 1 Pages: 13665-13665

    • DOI

      10.1038/s41598-021-93006-0

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Cloud-Resolving-Model Simulations of Nocturnal Precipitation over the Himalayan Slopes and Foothills2021

    • Author(s)
      Sugimoto Shiori, Ueno Ken'ichi, Fujinami Hatsuki, Nasuno Tomore, Sato Tomonori and Takahashi G. Hiroshi
    • Journal Title

      Journal of Hydrometeorology

      Volume: 22 Issue: 12 Pages: 3171-3188

    • DOI

      10.1175/jhm-d-21-0103.1

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Twice‐Daily Monsoon Precipitation Maxima in the Himalayas Driven by Land Surface Effects2021

    • Author(s)
      Fujinami Hatsuki、Fujita Koji、Takahashi Nobuhiro、Sato Tomonori、Kanamori Hironari、Sunako Sojiro、Kayastha Rijan B.
    • Journal Title

      Journal of Geophysical Research: Atmospheres

      Volume: 126 Issue: 13

    • DOI

      10.1029/2020jd034255

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Effects of convection representation and model resolution on diurnal precipitation cycle over the Indian monsoon region: Toward a convection-permitting regional climate simulation.2020

    • Author(s)
      Konduru, R.T. and Takahashi, H. G.
    • Journal Title

      Journal of Geophysical Research: Atmospheres

      Volume: 125 Issue: 16

    • DOI

      10.1029/2019jd032150

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Impact of Sea Surface Temperature near Japan on the Extra-Tropical Cyclone Induced Heavy Snowfall in Tokyo by a Regional Atmospheric Model2020

    • Author(s)
      Takahashi, H. G. and Yamazaki, T.
    • Journal Title

      SOLA

      Volume: 16 Issue: 0 Pages: 206-211

    • DOI

      10.2151/sola.2020-035

    • NAID

      130007936653

    • ISSN
      1349-6476
    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Response of the Asian summer monsoon precipitation to global warming in a high-resolution global nonhydrostatic model.2020

    • Author(s)
      Takahashi, H. G., Kamizawa, N., Nasuno, T., Yamada, Y., Kodama, C., Sugimoto, S. and Satoh, M.
    • Journal Title

      Journal of Climate

      Volume: 33 Issue: 18 Pages: 8147-8164

    • DOI

      10.1175/jcli-d-19-0824.1

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] 4-year Climatology of Global Drop Size Distribution and its Seasonal Variability Observed by Spaceborne Dual-frequency Precipitation Radar2020

    • Author(s)
      M. Yamaji, H. G. Takahashi, T. Kubota, R. Oki, A. Hamada, and Y. N. Takayabu
    • Journal Title

      Journal of the Meteorological Society of Japan. Ser. II

      Volume: 98 Issue: 4 Pages: 755-773

    • DOI

      10.2151/jmsj.2020-038

    • NAID

      130007888007

    • ISSN
      0026-1165, 2186-9057
    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Seasonal differences in the land-atmosphere coupling over South Asia simulated using a regional climate model.2020

    • Author(s)
      Konduru, R. T., and Takahashi, H. G.
    • Journal Title

      Geographical reports of Tokyo Metropolitan University

      Volume: 55 Pages: 23-34

    • Related Report
      2019 Annual Research Report
    • Open Access
  • [Presentation] CMIP6による夏季アジアモンスーン降水量の将来変化.2021

    • Author(s)
      神澤 望・高橋 洋
    • Organizer
      日本気象学会2021年度秋季大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Surface air temperature response to anthropogenic aerosols including SST feedbacks in the Asian monsoon region2021

    • Author(s)
      Kitabayashi, S., and Takahashi, H. G.
    • Organizer
      American Geophysical Union Fall Meeting 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] アジアモンスーン域のエアロゾルによる気温応答とSSTフィードバックの関係性.2021

    • Author(s)
      北林 翔・高橋 洋
    • Organizer
      日本気象学会2021年度秋季大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 南アジアモンスーン域におけるエアロゾルの気候への影響とENSOなどの海洋の寄与.2021

    • Author(s)
      北林 翔・高橋 洋
    • Organizer
      日本気象学会2021年度春季大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Climate response to anthropogenic aerosols and related SST variabilities including ENSO in the Asian monsoon region.2021

    • Author(s)
      Kitabayashi, S., and Takahashi, H. G.
    • Organizer
      European Geosciences Union General Assembly 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Sensitivity of precipitation intensity and frequency to the land surface resolution in explicit convection climate simulations over South Asian region.2021

    • Author(s)
      Konduru, R. T. and Takahashi, H. G.
    • Organizer
      The fifth Convection-Permitting Modeling Workshop 2021 (CPM2021; A2-22): High-Resolution Climate Modeling and Hazards
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] On the Sensitivity of land-atmosphere coupling to the model mesh sizes during the Indian summer monsoon: Based on high-resolution regional climate simulations.2021

    • Author(s)
      Konduru, R. T. and Takahashi, H. G.
    • Organizer
      Japan Geoscience Union meting 2021
    • Related Report
      2021 Annual Research Report
  • [Presentation] Role of tropical cyclones along the monsoon trough in the future changes of the Asian monsoon precipitation by high-resolution models.2021

    • Author(s)
      Takahashi, H. G.
    • Organizer
      European Geosciences Union General Assembly 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Spatial extent of extreme precipitation systems over the Indian summer monsoon region.2021

    • Author(s)
      Gupta, A. and Takahashi, H. G.
    • Organizer
      Workshop on Indian Ocean Variability and Teleconnections
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Representation of diurnal cycle of summer monsoon precipitation in the convection-permitting climate model and its sensitivity to the current generation cumulus parameterizations.2021

    • Author(s)
      Konduru, R.T. and Takahashi, H. G.
    • Organizer
      12th Tropical Meteorology Study Group Meeting
    • Related Report
      2020 Annual Research Report
  • [Presentation] A new light on the long-term trends of extreme rainfall characteristics over Central India.2020

    • Author(s)
      Gupta, A. and Takahashi, H. G.
    • Organizer
      JpGU-AGU Joint Meeting 2020
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Understanding the 2018 heatwave in Japan from the Pacific-Japan teleconnection pattern and its relationship with the seasonal march of the Asian summer monsoon.2020

    • Author(s)
      Kamizawa, N. and Takahashi, H. G.
    • Organizer
      American Geophysical Union Fall Meeting
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 黒潮流路に着目した関東地方の降雪と南岸低気圧経路との関係2020

    • Author(s)
      小原亘広・高橋 洋
    • Organizer
      日本気象学会2020年度秋季大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Frequency of noon/afternoon convective precipitation dominates on wet surface conditions over Indian monsoon region.2020

    • Author(s)
      Konduru, R.T. and Takahashi, H. G.
    • Organizer
      JpGU-AGU Joint Meeting 2020
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Role of the monsoon trough and tropical cyclone activity on the interannual and long-term variations of the Asian monsoon precipitation.2020

    • Author(s)
      Takahashi, H. G. and Kamizawa, N.
    • Organizer
      American Geophysical Union Fall Meeting
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 2018年7月に日本で発生した高温現象時への太平洋・日本パターンの影響と夏季アジアモンスーンの季節進行の関係性2020

    • Author(s)
      神澤 望・高橋 洋
    • Organizer
      2020年日本地理学会春季学術大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] アジアモンスーン域での降水日変化における大気陸面相互作用の役割2019

    • Author(s)
      高橋 洋・杉本志織・藤波初木
    • Organizer
      日本気象学会2019年度春季大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] チベット-ヒマラヤ域を対象とした高解像実験の重要性2019

    • Author(s)
      杉本志織・高橋 洋
    • Organizer
      日本気象学会2019年度春季大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Gloal Drop Size Distribution observed by GPM/DPR2019

    • Author(s)
      Yamaji, M., Takahashi, H. G., Kubota, T., Oki, R., Hamada, A., and Takayabu. Y. N. 2019
    • Organizer
      39th International Conference on Radar Meteorology
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Challenges for a systematic understanding of land-atmosphere process over Asia.2019

    • Author(s)
      S. Sugimoto, and H. G. Takahashi
    • Organizer
      AsiaPEX International SSG Workshop
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Remarks] eurekalert:

    • URL

      https://www.eurekalert.org/news-releases/597319

    • Related Report
      2021 Annual Research Report
  • [Remarks] 最近10年間の梅雨前線帯の降水活発化~令和2年7月豪雨と の関連~

    • URL

      https://www.tmu.ac.jp/news/topics/31108.html

    • Related Report
      2021 Annual Research Report
  • [Remarks] 【東京都立大学ウェブマガジン】メトロノワ

    • URL

      https://metro-noix.tmu.ac.jp/article/0010.html

    • Related Report
      2021 Annual Research Report
  • [Remarks] 代表者のホームページ、研究内容の紹介

    • URL

      https://www.comp.tmu.ac.jp/camo/pg129.html

    • Related Report
      2021 Annual Research Report 2020 Annual Research Report
  • [Remarks] 【研究発表】夏季アジアモンスーン降水の将来変化: 台風・熱帯擾乱活動の重要性

    • URL

      https://www.tmu.ac.jp/news/topics/26315.html

    • Related Report
      2020 Annual Research Report
  • [Remarks] 【研究発表】東京での雪の予報に寄与する新たな要素を発見! ~日本周辺の海面水温が影響~

    • URL

      https://www.tmu.ac.jp/news/topics/30325.html

    • Related Report
      2020 Annual Research Report
  • [Remarks] Wetter than wet: Global warming means more rain

    • URL

      https://eurekalert.org/pub_releases/2020-07/tmu-wtw072220.php

    • Related Report
      2020 Annual Research Report
  • [Remarks] 東京都立大学 気候システム研究グループ

    • URL

      http://camo.geog.ues.tmu.ac.jp/

    • Related Report
      2019 Annual Research Report

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Published: 2019-04-18   Modified: 2023-12-25  

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