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 as equatorial Kelvin waves and westward propagating equatorial Rossby waves. The results suggest a similar local impact of all such events in suppressing the rain rate over land relative to that over the sea when the main convective envelope approaches.
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页码:9306 / 9314
页数:9
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Wheeler M, 2001, MON WEATHER REV, V129, P2677, DOI 10.1175/1520-0493(2001)129<2677:RTMAPO>2.0.CO
机构:
Japan Agcy Marine Earth Sci & Technol, Yokosuka, Kanagawa 2370061, Japan
Columbia Univ, Lamont Doherty Earth Observ, New York, NY USAJapan Agcy Marine Earth Sci & Technol, Yokosuka, Kanagawa 2370061, Japan
Yokoi, Satoru
Sobel, Adam H.
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Columbia Univ, Lamont Doherty Earth Observ, New York, NY USA
Columbia Univ, Dept Earth & Environm Sci, Dept Appl Phys & Appl Math, New York, NY USAJapan Agcy Marine Earth Sci & Technol, Yokosuka, Kanagawa 2370061, Japan
机构:
Japan Agcy Marine Earth Sci & Technol, Yokosuka, Kanagawa 2370061, Japan
Columbia Univ, Lamont Doherty Earth Observ, New York, NY USAJapan Agcy Marine Earth Sci & Technol, Yokosuka, Kanagawa 2370061, Japan
Yokoi, Satoru
Sobel, Adam H.
论文数: 0引用数: 0
h-index: 0
机构:
Columbia Univ, Lamont Doherty Earth Observ, New York, NY USA
Columbia Univ, Dept Earth & Environm Sci, Dept Appl Phys & Appl Math, New York, NY USAJapan Agcy Marine Earth Sci & Technol, Yokosuka, Kanagawa 2370061, Japan