Results 151 to 160 of about 639 (194)
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Intraseasonal Oscillation Indices from Complex EOFs
Journal of Climate, 2021AbstractIndices of oscillatory behavior are conveniently obtained by projecting the fields in question into a phase space of a few (mostly just two) dimensions; empirical orthogonal functions (EOFs) or other, more dynamical, modes are typically used for the projection.
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A typology for intraseasonal oscillations
International Journal of Climatology, 2013ABSTRACTThis descriptive study attempts to document the diversity of intraseasonal oscillations (ISO) propagative and spatial patterns, as inferred from outgoing longwave radiation (OLR) variability. Main ISO events over the Indo‐Pacific Warm Pool are first extracted using a local mode analysis (LMA) applied on the 20–120‐d filtered OLR on the 1979 ...
Pohl, Benjamin, Camberlin, Pierre
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Intraseasonal Oscillations over the Atlantic
Journal of Climate, 1993Abstract Winds at low (near-surface) and 200-mb levels from National Hurricane Center objective analyses are used to elucidate the structure and dynamics of the tropical and subtropical intraseasonal oscillations for the North Atlantic/northeast Pacific regions, including over the continents, for the years 1980–1989.
Lloyd J. Shapiro, Stanley B. Goldenberg
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Intraseasonal oscillation in the tropical Indian Ocean
Advances in Atmospheric Sciences, 2005The features of the intraseasonal oscillation (ISO) of the tropical Indian Ocean are studied using several sources of observational data. It is shown that there are intraseasonal oscillations in the tropical Indian Ocean, but their periods vary with latitude: the major period is about 20–30 days in the equatorial region, about 30–50 days at 10°N/10°S ...
Li Chongyin, Hu Ruijin, Yang Hui
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Seasonality and mechanisms of tropical intraseasonal oscillations
Climate Dynamics, 2017This study has compared the monsoon intraseasonal oscillation (MISO) during the boreal summer and Madden Julian Oscillation (MJO) during the boreal winter. Based on MISO and MJO in high-resolution three-dimensional diabatic heating, the possible mechanisms are discussed through observational analyses of dynamical and thermodynamical variables. The MISO
Abheera Hazra, V. Krishnamurthy
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Radiation Budget of the Tropical Intraseasonal Oscillation
Journal of the Atmospheric Sciences, 2004Abstract This study examines the relationship between precipitation and radiative heating on intraseasonal time scales in the Tropics using collocated top-of-atmosphere (TOA) and surface radiative flux measurements from special field program data [Atmospheric Radiation Measurement (ARM) Program and Tropical Ocean Global Atmosphere Coupled Ocean ...
Jia-Lin Lin, Brian E. Mapes
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Bimodal representation of the tropical intraseasonal oscillation
Climate Dynamics, 2011The tropical intraseasonal oscillation (ISO) shows distinct variability centers and propagation patterns between boreal winter and summer. To accurately represent the state of the ISO at any particular time of a year, a bimodal ISO index was developed.
Kazuyoshi Kikuchi +2 more
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Kernel Analog Forecasting of Tropical Intraseasonal Oscillations
Journal of the Atmospheric Sciences, 2017Abstract This paper presents the results of forecasting the Madden–Julian oscillation (MJO) and boreal summer intraseasonal oscillation (BSISO) through the use of satellite-obtained global brightness temperature data with a recently developed nonparametric empirical method.
Dimitrios Giannakis +3 more
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Observed Modal Characteristics of the Intraseasonal Oscillation
Journal of Climate, 1989Abstract Global datasets produced by the Geophysical Fluid Dynamics Laboratory for the 1979 summer season are used to study the observed three-dimensional structure of the tropical 30–50 day oscillation. Decomposition of them data onto horizontal and vertical functions obtained as solutions of a linearized primitive equation model reveals a dominant ...
Julia Nogués-Paegle +2 more
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The intraseasonal oscillation in ECHAM4 Part II: sensitivity studies
Climate Dynamics, 2004The focus is on sensitivity studies to identify factors that increase the skill of the ECHAM4 atmosphere general circulation model (GCM) in representing the intraseasonal oscillation (ISO). The ISO mode is dominated by an eastward propagating oscillation during boreal winter, also known as the Madden-Julian oscillation.
Liess, S., Bengtsson, L.
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