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Predictability at intraseasonal time scale
Author(s) -
Krishnamurthy V.,
Sharma A. S.
Publication year - 2017
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1002/2017gl074984
Subject(s) - predictability , climatology , range (aeronautics) , phase space , environmental science , nonlinear system , oscillation (cell signaling) , scale (ratio) , meteorology , climate model , climate change , mathematics , geology , physics , statistics , aerospace engineering , engineering , quantum mechanics , genetics , oceanography , biology , thermodynamics
Abstract Establishing the predictability of the climate system beyond the weather time scale of about 10 days is essential for extended range prediction. To overcome the limitation imposed by deterministic chaos on long‐range prediction, we exploit the near‐oscillatory behavior of monsoon intraseasonal oscillation (MISO) and other such phenomena in the tropical climate. These are nonlinear oscillations in the time range of 30–60 days. Based on the phase space reconstruction method of nonlinear dynamical systems theory, we have developed a prediction model using the time series of MISO. We demonstrate that the Indian monsoon intraseasonal oscillation can be predicted with more accuracy at extended range. The phase space reconstruction model performs better than the Climate Forecast System of the National Centers for Environmental Prediction in predicting the MISO. Our results show that intraseasonal variability can be modeled as a low‐dimensional dynamical system and demonstrate extended predictability of climate.