GSTDTAP  > 气候变化
DOI10.1002/joc.4948
Tropical intraseasonal oscillations in CFSv2 during Boreal summer and winter
Krishnamurthy, V.
2017-07-01
发表期刊INTERNATIONAL JOURNAL OF CLIMATOLOGY
ISSN0899-8418
EISSN1097-0088
出版年2017
卷号37期号:9
文章类型Article
语种英语
国家USA
英文摘要

The simulation of the tropical intraseasonal oscillations (ISOs) by a coupled model in the Indo-Pacific region is examined in this study. The retrospective forecasts by the Climate Forecast System version 2 (CFSv2) of National Centers of Environmental Prediction for the period 1982-2010 have been analysed and compared with observation. The leading Indian monsoon intraseasonal oscillation (MISO) during the boreal summer and the Madden-Julian Oscillation (MJO) during the boreal winter are extracted from daily precipitation anomalies in forecasts and observations by using a data-adaptive method. The model forecasts from May initial conditions simulates the observed spatial structure, magnitude and the northward and eastward propagation of MISO reasonably well. Similar performance is also evident in the simulation of the eastward propagating MJO in forecasts from November initial conditions. In the simulation of both the MISO and MJO by the model, the zonal wind at lower level shows appropriate observed relation with the precipitation and coupling with convection. The observed phase relations between precipitation and low-level relative vorticity and between precipitation and upper-level divergence in the zonal and meridional propagations are captured by the model. However, the variance of the ISOs differs from observation in certain regions, and the phase of the ISOs exhibits wide differences among the ensemble members of the forecast and with the observation. Comparison with the earlier model, CFS version 1, shows that the space-time structure and evolution of MISO and MJO are better simulated by CFSv2.


英文关键词Indian monsoon intraseasonal oscillation MISO MJO CFSv2 forecasts
领域气候变化
收录类别SCI-E
WOS记录号WOS:000404854600013
WOS关键词CLIMATE FORECAST SYSTEM ; MADDEN-JULIAN OSCILLATION ; 30-50 DAY VARIABILITY ; AIR-SEA INTERACTIONS ; INTERANNUAL VARIABILITY ; COLORED NOISE ; VERSION 2 ; MONSOON ; MODELS ; MJO
WOS类目Meteorology & Atmospheric Sciences
WOS研究方向Meteorology & Atmospheric Sciences
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/37243
专题气候变化
作者单位George Mason Univ, Ctr Ocean Land Atmosphere Studies, Res Hall,MS 6C5,4400 Univ Dr, Fairfax, VA 22030 USA
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Krishnamurthy, V.. Tropical intraseasonal oscillations in CFSv2 during Boreal summer and winter[J]. INTERNATIONAL JOURNAL OF CLIMATOLOGY,2017,37(9).
APA Krishnamurthy, V..(2017).Tropical intraseasonal oscillations in CFSv2 during Boreal summer and winter.INTERNATIONAL JOURNAL OF CLIMATOLOGY,37(9).
MLA Krishnamurthy, V.."Tropical intraseasonal oscillations in CFSv2 during Boreal summer and winter".INTERNATIONAL JOURNAL OF CLIMATOLOGY 37.9(2017).
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