Vertical grid spacing necessary for simulating tropical cirrus clouds with a high‐resolution atmospheric general circulation model

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  • Tatsuya Seiki
    Japan Agency for Marine‐Earth Science and Technology Yokohama Japan
  • Chihiro Kodama
    Japan Agency for Marine‐Earth Science and Technology Yokohama Japan
  • Masaki Satoh
    Japan Agency for Marine‐Earth Science and Technology Yokohama Japan
  • Tempei Hashino
    Research Center for Environmental Changes Academia Sinica Taipei Taiwan
  • Yuichiro Hagihara
    Research Institute for Applied Mechanics Kyushu University Fukuoka Japan
  • Hajime Okamoto
    Research Institute for Applied Mechanics Kyushu University Fukuoka Japan

書誌事項

公開日
2015-05-26
資源種別
journal article
権利情報
  • http://creativecommons.org/licenses/by-nc-nd/4.0/
DOI
  • 10.1002/2015gl064282
公開者
American Geophysical Union (AGU)

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説明

<jats:title>Abstract</jats:title><jats:p>The distribution of simulated cirrus clouds over the tropics is affected by the particular model's vertical grid spacing. To examine this effect, we use a high‐resolution atmospheric general circulation model with 28 km and 14 km horizontal meshes. We show that a vertical grid spacing of 400 m or less is necessary to resolve the bulk structure of cirrus clouds. As one reduces the vertical grid spacing below about 1000 m, the visible cirrus cloud fraction decreases, the cloud thins (optically and geometrically), the cloud top height lowers, and consequently, the outgoing longwave radiation increases. These effects are stronger over the tropics. When using a vertical grid spacing of 400 m or less, the vertical profiles of effective radii and ice water content converge toward measurements (CloudSat satellite and Cloud‐Aerosol Lidar and Infrared Pathfinder Satellite Observation).</jats:p>

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