CAJ | 학술논문

利用1979-2008年的NCEP/NCAR再分析资料和中国西北地区136个台站的气象资料,研究了ENSO Modoki与春、秋季中国西北地区极端低温的关系。结果表明：当秋季发生El Ni?o Modoki事件时,次年春季新疆中部、西北部边缘地区及祁连山脉附近的极端低温事件较少,发生La Ni?a Modoki事件时则相反；当冬季发生El Ni?o Modoki事件时,次年秋季宁夏、陕西及甘肃中南部地区的极端低温事件较多,而发生La Ni?a Modoki事件时则相反。另外,500 hPa位势高度场合成分析显示,极端低温事件多发与否,与中国西北地区附近是否有发展旺盛的径向环流有着一定的关系。
이용1979-2008년적NCEP/NCAR재분석자료화중국서북지구136개태참적기상자료,연구료ENSO Modoki여춘、추계중국서북지구겁단저온적관계。결과표명：당추계발생El Ni?o Modoki사건시,차년춘계신강중부、서북부변연지구급기련산맥부근적겁단저온사건교소,발생La Ni?a Modoki사건시칙상반；당동계발생El Ni?o Modoki사건시,차년추계저하、협서급감숙중남부지구적겁단저온사건교다,이발생La Ni?a Modoki사건시칙상반。령외,500 hPa위세고도장합성분석현시,겁단저온사건다발여부,여중국서북지구부근시부유발전왕성적경향배류유착일정적관계。
NCEP/NCAR reanalysis data and data from 136 weather station in Northwest China were used to establish the relationship between ENSO Modoki and extremely low temperature over Northwest China. A correlation analysis showed that when El Ni?o Modoki occurred in autumn, the number of occurrences of extremely low temperature events would decrease in central Xinjiang, northwest edge of the area and the Qilian Mountains area in the next spring. However, when La Ni?a Modoki occurred in autumn, the situation would be opposite. When El Ni?o Modoki occurred in winter, the number of occurrences of extremely low temperature events would increase in Ningxia, Shanxi, central and southern Gansu in next autumn; when La Ni?a Modoki occurred in winter, the situation would be opposite. Composting analysis of 500 hPa geopotential height field showed that the occurrence of extremely low temperature events relied heavily on exuberant radial circulation near Northwest China.