Verification of WRF model On Accuracy and Precision of Various Schemes and Evaluation of Precipitation Forecast in Iran
Author(s):
Abstract:
In this study، it has been tried to test the accuracy of output and hence the model efficiency in the predictions of 24 and 48 hour precipitation forecasting by choosing different schemes be assessed. Therefore، in order to test the accuracy of model product، two conditions of rainfall precipitation and lack of rainfall precipitation were considered. Four thresholds were taken. Adaptive table and threat scores were calculated. The final results of the analysis are summarized. The results indicate that among different configurations، the model output for the two configurations of GDMYJ and KFMYJ which in both of them boundary layer scheme Mellor-Yamada-Janjic were used، are closer to the truth and their accuracy are more acceptable. Then proportion correct (PC) for the four thresholds، without precipitation (≤ 1. 0)، less than or equal to 1 mm (1 ≥ and> 1. 0)، less than or equal to 10 mm (10 ≥ and> 1) and more than one، and more than 10 mm (<10) for 48 hours predictions have acceptable values such that totally about 80 percent، predicting the occurrence or non-occurrence of precipitation is done properly. Amount of H represents for two thresholds means less than 1. 0 and more than 10 mm is close to one، it means that the model for the two mentioned thresholds has higher accuracy. This quantity for the range of one tenth to a millimeter is 0. 3 which indicates the relative weakness of model in this range
Keywords:
Language:
Persian
Published:
Geographical Research, Volume:28 Issue: 2, 2014
Pages:
187 to 194
magiran.com/p1239691
دانلود و مطالعه متن این مقاله با یکی از روشهای زیر امکان پذیر است:
اشتراک شخصی
با عضویت و پرداخت آنلاین حق اشتراک یکساله به مبلغ 1,390,000ريال میتوانید 70 عنوان مطلب دانلود کنید!
اشتراک سازمانی
به کتابخانه دانشگاه یا محل کار خود پیشنهاد کنید تا اشتراک سازمانی این پایگاه را برای دسترسی نامحدود همه کاربران به متن مطالب تهیه نمایند!
توجه!
- حق عضویت دریافتی صرف حمایت از نشریات عضو و نگهداری، تکمیل و توسعه مگیران میشود.
- پرداخت حق اشتراک و دانلود مقالات اجازه بازنشر آن در سایر رسانههای چاپی و دیجیتال را به کاربر نمیدهد.
In order to view content subscription is required
Personal subscription
Subscribe magiran.com for 70 € euros via PayPal and download 70 articles during a year.
Organization subscription
Please contact us to subscribe your university or library for unlimited access!