摘要
试用一种新的指标方法来揭示乌鲁木齐地区的干旱,该方法具有计算简单、物理意义明确、能反映客观实际等特点。根据该指标的变化分析得出:用该方法反映出来的干旱程度与实际干旱比较一致;乌鲁木齐地区的干旱程度有减小的趋势,20世纪80年代初期为转折点,与气温变暖发生转折的时间基本一致,这对该地区生态环境的好转和农牧业生产都有好处;虽然80年代以后的干旱程度比六七十年代有所缓解,但由于降水和蒸发的量级差别,该地区降水增加和蒸发减少这种变化趋势在短期内并不能有效改善本地区的干旱状况,未来一段时间内干旱仍将是我们面临的很严峻的问题。
In this paper we try discovering a new indicator to disclose the true character of drought in Urumqi area, it have the features such as simple computing method, clear physical meaning and reflecting objective actual etc. According to analyze of this new indicator, we found that the drought degree reflected by the indicator was more consistent with the actual drought degree; the trend of drought degree is decreased in Urumqi area, the turning point was in early 1980＇s, in accordance with the time of temperature warming, and to be all beneficial for the ecological environment improvement and the production of agriculture and animal husbandry in local area; although the drought degree after 1980＇s was less serious than in the 1960s and 1970s, because of the magnitude contrast of precipitation and evaporation, the change trend with increasing precipitation and reducing evaporation can not improve the drought conditions for a short time in local area, the drought will be still a very serious problem that we confront.
出处
《沙漠与绿洲气象》
2008年第6期34-37,共4页
Desert and Oasis Meteorology
