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DOI | 10.1002/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
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ISSN | 0899-8418 |
EISSN | 1097-0088 |
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 |
推荐引用方式 GB/T 7714 | 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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