Journal cover Journal topic
Geoscientific Model Development An interactive open-access journal of the European Geosciences Union
Geosci. Model Dev., 8, 2841-2856, 2015
http://www.geosci-model-dev.net/8/2841/2015/
doi:10.5194/gmd-8-2841-2015
© Author(s) 2015. This work is distributed
under the Creative Commons Attribution 3.0 License.
Model experiment description paper
09 Sep 2015
The GRENE-TEA model intercomparison project (GTMIP): overview and experiment protocol for Stage 1
S. Miyazaki1,2,a, K. Saito2, J. Mori1,2, T. Yamazaki3, T. Ise4, H. Arakida5, T. Hajima2, Y. Iijima1, H. Machiya1,2, T. Sueyoshi1,2, H. Yabuki1,2, E. J. Burke6, M. Hosaka7, K. Ichii2, H. Ikawa8, A. Ito9, A. Kotani12, Y. Matsuura10, M. Niwano7, T. Nitta11, R. O'ishi1,11, T. Ohta12, H. Park2, T. Sasai13, A. Sato14, H. Sato2, A. Sugimoto15, R. Suzuki2, K. Tanaka2, S. Yamaguchi14, and K. Yoshimura11 1National Institute of Polar Research, Tachikawa, Japan
2Japan Agency for Marine-Earth Science and Technology, Yokohama, Japan
3Graduate School of Science, Tohoku University, Sendai, Japan
4Field Science Education and Research Center, Kyoto University, Kyoto, Japan
5Advanced Institute for Computational Science, RIKEN, Kobe, Japan
6Met Office Hadley Centre, Exeter, UK
7Meteorological Research Institute, Tsukuba, Japan
8National Institute for Agro-Environmental Sciences, Tsukuba, Japan
9National Institute for Environmental Studies, Tsukuba, Japan
10Forestry and Forest products Research Institute, Tsukuba, Japan
11Atmosphere and Ocean Research Institute, The University of Tokyo, Kashiwa, Japan
12Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan
13Faculty of Life and Environmental Science, University of Tsukuba, Tsukuba, Japan
14Snow and Ice Research Center, National Research Institute for Earth Science and Disaster Prevention, Nagaoka, Japan
15Faculty of Environmental Earth Science, Hokkaido University, Sapporo, Japan
anow at: Sonic Corporation, Tachikawa, Japan
Abstract. As part of the terrestrial branch of the Japan-funded Arctic Climate Change Research Project (GRENE-TEA), which aims to clarify the role and function of the terrestrial Arctic in the climate system and assess the influence of its changes on a global scale, this model intercomparison project (GTMIP) is designed to (1) enhance communication and understanding between the modelling and field scientists and (2) assess the uncertainty and variations stemming from variability in model implementation/design and in model outputs using climatic and historical conditions in the Arctic terrestrial regions. This paper provides an overview of all GTMIP activity, and the experiment protocol of Stage 1, which is site simulations driven by statistically fitted data created using the GRENE-TEA site observations for the last 3 decades. The target metrics for the model evaluation cover key processes in both physics and biogeochemistry, including energy budgets, snow, permafrost, phenology, and carbon budgets. Exemplary results for distributions of four metrics (annual mean latent heat flux, annual maximum snow depth, gross primary production, and net ecosystem production) and for seasonal transitions are provided to give an outlook of the planned analysis that will delineate the inter-dependence among the key processes and provide clues for improving model performance.

Citation: Miyazaki, S., Saito, K., Mori, J., Yamazaki, T., Ise, T., Arakida, H., Hajima, T., Iijima, Y., Machiya, H., Sueyoshi, T., Yabuki, H., Burke, E. J., Hosaka, M., Ichii, K., Ikawa, H., Ito, A., Kotani, A., Matsuura, Y., Niwano, M., Nitta, T., O'ishi, R., Ohta, T., Park, H., Sasai, T., Sato, A., Sato, H., Sugimoto, A., Suzuki, R., Tanaka, K., Yamaguchi, S., and Yoshimura, K.: The GRENE-TEA model intercomparison project (GTMIP): overview and experiment protocol for Stage 1, Geosci. Model Dev., 8, 2841-2856, doi:10.5194/gmd-8-2841-2015, 2015.
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The paper provides an overall outlook and the Stage 1 experiment (site simulations) protocol of GTMIP, an open model intercomparison project for terrestrial Arctic, conducted as an activity of the Japan-funded Arctic Climate Change Research Project (GRENE-TEA). Models are driven by 34-year data created with the GRENE-TEA observations at four sites in Finland, Siberia and Alaska, and evaluated for physico-ecological key processes: energy budgets, snow, permafrost, phenology, and carbon budget.
The paper provides an overall outlook and the Stage 1 experiment (site simulations) protocol of...
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