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A Climatology of Heavy Rain and Major Flood Events in Victoria 1876-2019 and the Effect of the 1976 Climate Shift

Journal of Geographical Research 2021年第3期4卷 12-33页

作者： Jeff Callaghan Retired Bureau of Meteorology BrisbaneQueenslandAustralia

An extensive search has been carried out to find all major flood and very heavy rainfall events in Victoria since 1876 when Southern Oscillation(SOI)data became *** synoptic weather patterns were analysed and of the 319 events studied,121 events were found to be East Coast lows(ECLs)and 82 were other types of low-pressure *** influences also played a large role with 105 events being associated with tropical air advecting down to Victoria into weather *** are presented of all the major synoptic patterns *** SOI was found to be an important climate driver with positive SOIs being associated with many events over the 144 years *** 1976 Climate Shift and its influence on significant Victorian rainfall events is studied and negative SOI monthly values were shown to dominate following the ***,one of the most active periods in 144 years of Victorian heavy rain occurred after the shift with a sustained period of positive SOI events from 2007 to ***,it is critical for forecasting future Victorian heavy rainfall is to understand if sequences of these positive SOI events continue like those preceding the *** relationships between the Shift and Global Temperature rises are also *** wind data available from some of the heaviest rainfall events showed the presence of anticyclonic turning of the winds between 850hPa and 500hPa levels which has been found to be linked with extreme rainfall around the Globe.

关键词： low pressure systems Tropical interaction Warm air advection Southern oscillation index

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Dynamic Plateau Monsoon Index and its Association with General Circulation Anomaly

Dynamic Plateau Monsoon Index and its Association with Gener...

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强化科技基础推进气象现代化——第29届中国气象学会年会

作者：荀学义胡泽勇马耀明 Key Laboratory of Land Surface Process and Climate Change in Cold and Arid Regions Cold and Arid Regions Environmental and Engineering Research InstituteChinese Academy of Sciences Inner Mongolia Autonomous Region Meteorological Observatory Institute of Tibetan Plateau ResearchChinese Academy of Sciences

Based on monthly ECMWF re-analysis-Interim(ERA-Interim) reanalysis data and monthly precipitation and temperature data,a Dynamic Plateau Monsoon Index(DPMI) was defined;it is a revision of the Traditional Plateau Monsoon Index(TPMI).A contrast analysis of the DPMI versus the TPMI was then *** general circulation response to northern Qinghai-Xizang plateau summer monsoon anomalies and the correlation of the DPMI with general circulation anomalies were *** results of this study show that during the plateau summer monsoon,the main body of the plateau is controlled by a powerful warm low;the wind field makes a cyclonic meander near the surface;and the air flow over the plateau converges toward the changeable warm low center over *** DPMI reflected meteorological elements better and depicted climate variation more accurately than did the *** years when the plateau summer monsoon is strong,the low over the plateau and the trough near the eastern coast of Asia are deeper and higher than normal over South *** correlation corresponds to two anomalous cyclones over the plateau and the eastern coast of Asia and an anomalous anticyclone in South *** plateau and its adjacent regions are affected by anomalous southwesterly winds that transport more moisture to South China and cause more *** lower reaches of the Yangtze River appear to receive more precipitation by means of the strong westerly water vapor flow transported from the "large triangle affecting the region," which corresponds to the strong plateau summer *** years when the plateau summer monsoon is weak,the low over the plateau and the trough near the eastern coast of Asia are shallower,and the high over South China is weaker than normal,which corresponds to two anomalous anticyclones over the plateau and the eastern coast of Asia and an anomalous cyclone in South *** plateau and its adjacent regions are affected by anomalous northwesterly winds tha

关键词： Qinghai-Xizang Plateau Dynamic Plateau Monsoon Index low pressure systems center position general circulation

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