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2.1 Atmosphere and land surface

ModelJMA-GSM
Horizontal resolution and grid

TL319

(approx. 55km)

Atmosphere vertical resolutionL100
Top of atmosphere0.01hPa
Soil levels (layers)

7

 Level

Layer 1 : 0 - 0.02 m

Level

Layer 2 : 0.02 - 0.07

Level

Layer 3 : 0.07 – 0.19 m

Level

Layer 4 : 0.19 – 0.49 m

Level

Layer 5 : 0.49 – 0.99 m

Level

Layer 6 : 0.99 – 1.99 m

Level
Layer 7 : 1.99 – 3.49 m
Time step20 minutes

Detailed documentation: 

JMA, 2019: Outline of the operational numerical weather prediction at the Japan Meteorological Agency. Appendix to WMO Technical Progress Report on the Global Data-processing and Forecasting System and Numerical Weather Prediction Research. Appendix to WMO Technical Progress Report on the Global Data-processing and Forecasting System and Numerical Weather Prediction, Tokyo, Japan.

Yonehara, H., C. Matsukawa, T. Nabetani, T. Kanehama, T. Tokuhiro, K. Yamada, R. Nagasawa, Y. Adachi, and R. Sekiguchi, 2020: Upgrade of JMA’s Operational Global Model. Research activities in Earth system modelling. Working Group on Numerical Experimentation. Report No. 50. WCRP Report No.12/2020. WMO, Geneva. Section 6, page 19.

2.2 Ocean and cryosphere

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Forecast frequencydaily
Forecast ensemble size5 per day
Hindcast years19931991-20162020
Hindcast ensemble size10 (5 members with 15-day Lagged Average Forecast)
On-the-fly or static hindcast set?static

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