Journal article
A local index of Maritime Continent intraseasonal variability based on rain rates over the land and sea
CL Vincent, TP Lane, MC Wheeler
Geophysical Research Letters | AMER GEOPHYSICAL UNION | Published : 2016
DOI: 10.1002/2016GL069987
Abstract
A local index for describing intraseasonal variability over the Maritime Continent is developed. The index is based on the ratio of area-averaged rain rate over the land to that over the sea. It takes advantage of the fact that the main convective envelope of intraseasonal variability events tends to modulate the diurnal precipitation cycle over the land over the entire Maritime Continent. Lagged analysis is used to create composite intraseasonal variability events, where “day 0” is chosen according to when the normalized rain rate over the sea becomes greater than that over the land. The index identifies intraseasonal variability events associated with the Madden Julian Oscillation as well ..
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Grants
Awarded by Australian Research Council's Centre of Excellence for Climate System Science
Funding Acknowledgements
This work was funded by the Australian Research Council's Centre of Excellence for Climate System Science (CE110001028). Analysis was partly undertaken on the National Computational Infrastructure (NCI), which is supported by the Australian Government. Helpful discussions with Eric Maloney (Colorado State University) and assistance from Paola Petrelli (NCI) and Malcolm King (The University of Melbourne) are gratefully acknowledged. Thanks to Charmaine Franklin and Surendra Rauniyar (Australian Bureau of Meteorology) and two anonymous reviewers for helpful comments on the manuscript. Interpolated OLR data were downloaded from NOAA/OAR/ESRL PSD (http://www.esrl.noaa.gov/psd/). TRMM 3-hourly precipitation estimates were downloaded from the Goddard Earth Sciences Data and Information Services Center (ftp://disc2.nascom.nasa.gov/data/s4pa/TRMM_L3/TRMM_3B42/).