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High Resolution Polar Regional Climate Model NHM-SMAP for the Greenland Ice Sheet
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  • Masashi Niwano,
  • Teruo Aoki,
  • Akihiro Hashimoto,
  • Sumito Matoba,
  • Satoru Yamaguchi,
  • Tomonori Tanikawa,
  • Koji Fujita,
  • Akane Tsushima,
  • Yoshinori Iizuka,
  • Rigen Shimada,
  • Masahiro Hori
Masashi Niwano
Meteorological Research Institute

Corresponding Author:mniwano@mri-jma.go.jp

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Teruo Aoki
Okayama University
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Akihiro Hashimoto
Meteorological Research Institute
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Sumito Matoba
Hokkaido University
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Satoru Yamaguchi
Snow and Ice Research Center, National Research Institute for Earth Science and Disaster Prevention
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Tomonori Tanikawa
Meteorological Research Institute
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Koji Fujita
Graduate School of Environmental Studies, Nagoya University
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Akane Tsushima
Research Institute for Humanity and Nature
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Yoshinori Iizuka
Institute of Low Temperature Science, Hokkaido University
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Rigen Shimada
JAXA Japan Aerospace Exploration Agency
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Masahiro Hori
JAXA Japan Aerospace Exploration Agency
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Abstract

To improve surface mass balance (SMB) estimates for the Greenland Ice Sheet (GrIS), we develop a spatially and temporally high resolution polar regional climate model combining the Japan Meteorological Agency Non-Hydrostatic atmospheric Model and the Snow Metamorphism and Albedo Process model (NHM–SMAP). At present, the horizontal resolution of the model is set to be 5 km with the temporal interval of 1-hour. The model forced by the Japanese 55year Reanalysis (JRA-55) has been evaluated in the GrIS during the 2011–2014 mass balance years using in-situ surface meteorological and stake measurement data [1]. Results show that the model reproduced the measured features of the GrIS climate, diurnal variations, and even a meso-scale strong wind event. In particular, it reproduces the GrIS surface melt area extent well. Recently, near real-time calculations with the model are conducted operationally. Here we introduce the concept and framework of the model, then present performance of the model from various aspects. In addition, some new results from the operational near-real time calculations will be shown and discussed. Reference [1] Niwano et al. (2018) NHM-SMAP: Spatially and temporally high resolution non-hydrostatic atmospheric model coupled with detailed snow process model for Greenland Ice Sheet. The Cryosphere, 12, 635-655, doi:10.5194/tc-12-635-2018.