High-Resolution Climate Simulations in the Tropics with Complex Terrain Employing the CESM/WRF Model

This study evaluates the high-resolution climate simulation system CESM/WRF composed of the global climate model, Community Earth System Model (CESM) version 1, and the mesoscale model, Weather Research and Forecasting Model (WRF), for simulating high-resolution climatological temperature and precip...

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Bibliographic Details
Published in:Advances in meteorology 2018-01, Vol.2018 (2018), p.1-15
Main Authors: Afrizal, Tomi, Surussavadee, Chinnawat
Format: Article
Language:English
Subjects:
Annual precipitation
Atmosphere
Climate
Climate change
Climate models
Climatology
Computer simulation
Datasets
Earth
Global climate
Global climate models
Ground stations
High resolution
Islands
Mountains
Precipitation
Precipitation patterns
Precipitation-temperature relationships
Rain
Rainfall
Regions
Research methodology
Resolution
Seasonal precipitation
Simulation
Studies
Temperature
Terrain
Tropical environments
Weather forecasting
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Summary:This study evaluates the high-resolution climate simulation system CESM/WRF composed of the global climate model, Community Earth System Model (CESM) version 1, and the mesoscale model, Weather Research and Forecasting Model (WRF), for simulating high-resolution climatological temperature and precipitation in the tropics with complex terrain where temperature and precipitation are strongly inhomogeneous. The CESM/WRF climatological annual and seasonal precipitation and temperature simulations for years 1980–1999 at 10 km resolution for Sumatra and nearby regions are evaluated using observations and the global climate reanalysis ERA-Interim (ERA). CESM/WRF simulations at 10 km resolution are also compared with the downscaled reanalysis ERA/WRF at 10 km resolution. Results show that while temperature and precipitation patterns of the original CESM are very different from observations, those for CESM/WRF agree well with observations. Resolution and accuracies of simulations are significantly improved by dynamically downscaling CESM using WRF. CESM/WRF can simulate locations of very cold temperature at mountain peaks well. The high-resolution climate simulation system CESM/WRF can provide useful climate simulations at high resolution for Sumatra and nearby regions. CESM/WRF-simulated climatological temperature and precipitation at 10 km resolution agree well with ERA/WRF. This suggests the use of CESM/WRF for climate projections at high resolution for Sumatra and nearby regions.
ISSN:1687-9309
1687-9317
DOI:10.1155/2018/5707819