کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8864573 | 1620471 | 2018 | 19 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
RegCM4 model sensitivity to horizontal resolution and domain size in simulating the Indian summer monsoon
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
علم هواشناسی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Results illustrate that the RegCM4 has the capability to depict the important semi-permanent features of the ISM, however, skills vary with the resolutions and domain sizes. Experiments with different resolutions reveal that the lower (850â¯hPa) and upper (200â¯hPa) tropospheric circulations are stronger over the Arabian Sea and Bay of Bengal in the 36 and 40â¯km grid-spacing simulations and closer to EIN15, however, it is weaker in the high-resolution simulations at 27 and 18â¯km grid-spacing. The biases in vertically integrated moisture transport (VIMT) are positive in the model simulations with resolutions from 36 to 60â¯km, but, it is negative with 27 and 18â¯km grid resolution. The simulated precipitation intensity increases as one moves from coarse to higher resolution till grid spacing 36â¯km. The model efficiency reduces to simulate higher precipitation intensity over the maximum precipitation zones of India during summer monsoon season when grid spacing 27â¯km and 18â¯km are used. The overall performance is better with the use of 36-40â¯km grid spacing than other resolutions in simulating ISM and associated rainfall. The sensitivity of domain sizes is examined by confining the model resolution at 40â¯km. The model simulated meteorological parameters, as well as derived parameters (such as pattern and intensity of precipitation, geopotential height, relative humidity, air temperature, wind, and CAPE), are represented better in D02 than other domains. The present study proposes a Comprehensive Rating Matrices (CRM) to evaluate the model performance considering all experiments (horizontal resolution and domain size) and different homogeneous regions, including errors obtained using different statistical methods. The CRM and statistical based skill score (SS) suggest that the performance of RegCM4 is the best at 40â¯km horizontal resolution followed by 36â¯km and 45â¯km grid-spacing and the D02 domain is suitable for ISM simulation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Atmospheric Research - Volume 210, 15 September 2018, Pages 15-33
Journal: Atmospheric Research - Volume 210, 15 September 2018, Pages 15-33
نویسندگان
R.K.S. Maurya, P. Sinha, M.R. Mohanty, U.C. Mohanty,