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characteristic of precipitation variation
相关语句
  年降水变化特征
     Characteristic of Precipitation Variation in Summer Season over Qinghai Province in 500 Years Recorded from Tree-Rings
     树轮纪录的500年来青海地区夏半年降水变化特征
短句来源
  相似匹配句对
     The Variation Characteristic of Precipitation in Different Climatic Area of Bole
     博州不同气候区的降水变化特征
短句来源
     The variation of I.
     研究结果表明:I.
短句来源
     Preliminary Analysis on the Precipitation Variation Characteristic of Zhifanggou Watershed of Pingling City in 45 Years
     平凉市纸坊沟流域45年降水变化特征初步分析
短句来源
     Characteristic of daily variation for the geomagnetic Z component
     地磁Z分量日变化特征
短句来源
     Notes on the Bounded Variation Sequence and Its Characteristic
     关于囿变数列及其特征的若干注记
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The standardized (STD) chronology was established from tree\|ring data of Sabina Przewalskii in the middle part of the Qilian Mountains. The correlation was analyzed between the tree\|ring index and the precipitation in weather stations, near which the tree ring is sampled. The results showed that there were 31 dry spells and 30 wet spells in the past \{1 100\} years, of which 1540\_1590 A.D. was the longest dry period, lasting 6o years, and 1240\_1270 A.D. and 1860\_1890 A.D. were the longest wet periods, lasting...

The standardized (STD) chronology was established from tree\|ring data of Sabina Przewalskii in the middle part of the Qilian Mountains. The correlation was analyzed between the tree\|ring index and the precipitation in weather stations, near which the tree ring is sampled. The results showed that there were 31 dry spells and 30 wet spells in the past \{1 100\} years, of which 1540\_1590 A.D. was the longest dry period, lasting 6o years, and 1240\_1270 A.D. and 1860\_1890 A.D. were the longest wet periods, lasting 40 years respectively. There were 17 durations of dry period over 10 years, and 12 durations of wet period over 10 years. With regard to the century time scale, the 16th Century was 100 years of drought, with 80 years being lack of rain. The 13th Century, as well as the 19th Century, was 100 years of wet, with 60 years in spate. At the same time, another characteristic of precipitation variation in these mountains is more abrupt change. There have had 35 abrupt changes since 904 A.D., about 30 years on the average. There were 16 shifts from drought to wet, and 19 shifts from wet to drought. There were 9 abrupt changes in the 11th Century, 2 abrupt changes in the 15th and 16th Centuries. In the 20th Century there were 3 abrupt changes. Precipitation in these mountains frequently changed in the 11th Century, and less changed in the 15th and 16th Centuries. In the 20th Century precipitation changed frequently.

利用取自祁连山中部地区的树木年轮样本和该地区3个站点的降水资料,应用年轮气候学方法,重建了祁连山中部地区的降水量.自公元904年以来,该地区历经了31次相对干期和30次相对湿润期,其中,连续两个10a以上的干期有17次,湿润期12次,最长的干期是1540—1590年间,长达60a,最长的湿润期是1240—1270年、1860—1890年,各有40a.世纪尺度范围内,16世纪是最干的100a,有80a为少雨年;最湿润的是13世纪和19世纪,这期间有60a为多雨.自公元904年以来,降水量共发生了35次突变,16次是由旱向涝的突变,19次是由涝向旱的突变.平均约30a发生一次.11世纪是该地区降水的多变时期,15~16世纪是降水的相对稳定时段,20世纪又进入了降水的多变时期.

The paper analyzes the characteristics of precipitation variation in the last 50 years in the middle Yellow River, establishes a calculation formula of annual natural flow and analyzes the influence of the precipitation variation on runoff by using the data of precipitation of the middle Yellow River. The results are shown that since 1986, the annual natural flow is reduced about 20% than that of the early days, especially since 1994, the mean annual reduction is 6650 million...

The paper analyzes the characteristics of precipitation variation in the last 50 years in the middle Yellow River, establishes a calculation formula of annual natural flow and analyzes the influence of the precipitation variation on runoff by using the data of precipitation of the middle Yellow River. The results are shown that since 1986, the annual natural flow is reduced about 20% than that of the early days, especially since 1994, the mean annual reduction is 6650 million m~3 due to the obvious reduction of precipitation.

利用黄河中游地区降水资料,统计分析了黄河中游近50年降水变化特点,建立了天然年径流量计算公式,计算分析了降水变化对径流量的影响。结果表明,由于1986年以来降水量较前期减少明显,使得1986年以来天然年径流量较前期减少近20%,尤其1994年以来最甚,平均每年减少66.5亿m3。

 
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