干旱年 meaning in English
dry year
Examples
- Confirming the concept of hydrology aridity and the scope of guanzhong irrigation areas
根据研究的需要，对水文干旱年进行界定，同时界定关中九大灌区的范围。 - According to the response yield to water , five types of drought and yield reduction were defined , they are light moderate , heavy , serious heavy and ultra - heavy , and the spatio - temporal distribution of which and the correlativity between them in recent 40 years is analysed
根据产量对水分的响应，定义了五种干旱年型和减产年型，分别为轻、中、重、严重和极端严重。 - Abstract : monthly rainfall data from 1951 to 1995 for june , july and august in 13 meteorological stations of the north china were used for accounting z index and discussing serious flood and drought featureas in these months . serious flood mainly happened in july and august , and sevious drought mainly happened in august . there were more flood in 1950 ' s to 1960 ' s and more drought since 1970 ' s in the north china . meanwhile , the deeper trough which covered the regions from the ural mts . to the balkhash lake play an important role in serious rainstom in rainy season in the north china . there often happened serious flood ( drought ) when the northwester pacific subtropical high was by west and north ( east and south ) , and the sea surface temperature in the equatorial central and eastern pacific was mainly in dropping ( raising ) stage
文摘:利用华北平原地区的13个站点, 45年（ 1951 1995 )的降水资料,对夏季4个时段（ 6月、 7月、 8月、 6 8月）进行了z指数计算,确定了该地区各个时段的严重涝年和严重旱年.发现华北地区雨季的严重洪涝主要集中在7 , 8月,严重干旱则主要发生在8月,并可明显看出由50 60年代的多水期向70年代中期以后的少水期的转变,另外,乌拉尔山到巴尔喀什湖附近的低压槽加深和西北太平洋副热带高压的北抬,对华北地区雨季持续性暴雨的产生起着决定性的作用.严重洪涝年的夏季（ 6 8月） ,西北太平洋副热带高压偏西、偏北,赤道东太平洋海温多处于下降阶段;严重干旱年西北太平洋副高偏东、偏南,赤道东太平洋海温则处于上升阶段 - The results indicated : the probability distribution of natural moisture deficiency rates of winter wheat during the growing period could be divided into three types because of their regional difference , which were mainly in the north part , the middle part and the south part respectively in producing area of northern china . in north and middle , the frequency of serious drought was higher , but in south , it was the light drought
分析了不同干旱年型和减产年型的时空分布状况及其相关关系，关系表明，干旱年型和减产年型两者没有明显的一致性，而且干旱年型发生的站次多于对应的减产年型，尤其较重的干旱年型出现较多，而较重的减产年型极少。 - The vertical velocity in low troposphere is larger than high troposphere , and vertical velocity in flood year is also larger than that in drought year . the vertical velocity on different levels show that there exists distinct sinking motion from midlevel to uplevel of troposphere in drought years and updraft in whole atmosphere in flood years
垂直分布曲线均呈s形，垂直上升速度在对流层低层大于对流层上层，多雨年大于干旱年;不同层次上垂直速度分布图表明，旱年对流层中上层盛行下沉气流，而涝年整层大气始终表现为上升运动。