Publisher: Trans Tech Publications
E-ISSN: 1662-7482|2015|804|243-246
ISSN: 1660-9336
Source: Applied Mechanics and Materials, Vol.2015, Iss.804, 2015-11, pp. : 243-246
Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.
Abstract
The predictability by an atmospheric prediction model is determined by the uncertainties in the initial condition and the imperfection of the model. It is difficult to provide accurate weather prediction and determines the predictability of a model. Atmospheric prediction model efficiency is obtained from the analysis of predictability measurement. Five existing predictability measurements; Lyapunov exponent, finite size Lyapunov exponent, finite time Lyapunov exponent, local Lyapunov exponent and largest Lyapunov exponent are used to measure predictability of the northeast monsoon (winter monsoon) by the Educational Global Climate Model (EdGCM) and to test sensitivity of the model to small initial perturbations. The EdGCM is run for 142-year predictions from the year 1958 to 2100. However, only the outputs of geopotential height at 500hPa of December from 2012 to 2100 are used for predictability measurement. The results show that the EdGCM predictability for the northeast monsoon forecast is about 120 years.
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