| 印江县汛期降水年代际特征及与气温的关系 |
| |
| 作者姓名： | 方启云 代瑞华 杜柯 黎凌云 颉春艳 |
| |
| 作者单位： | 印江土家族苗族自治县气象局,印江土家族苗族自治县气象局,印江土家族苗族自治县气象局,印江土家族苗族自治县气象局,印江土家族苗族自治县气象局 |
| |
| 基金项目： | 铜仁市气象科技基金项目：《印江县汛期降水年代际特征及与气温的关系》（铜气科合[2019]01号） |
| |
| 摘 要： | 利用印江县气象观测站1970～2018年汛期（5～9月）日降水量,日平均、最高和最低气温资料,采用线性倾向估计、滑动平均法、 Mann一Kendall趋势法、 Morlet小波分析等方法对印江县汛期降水年代际特征进行了研究,并采用相关分析、t 检验等方法研究汛期降水与气温的关系。结果表明：(1)印江县近49a汛期总降水量有不显著的增加趋势,呈现 “增加-减少”的交替年代变化特征。年代尺度演变上,20～35a,10～19a,7～9a以及2～4a的4类周期变化尺度共同起作用,其中27a为第一主周期,9a为第二主周期。（2）印江县近49a 6月、7月和8月对汛期总降水贡献最大,变化趋势和总降水量基本一致;小、中和大雨的年总降水量呈减少,其中中雨减少微弱;暴雨及以上有增加趋势。小和中雨所占百分比呈下降趋势,占百分比最多的大雨也呈下降趋势,但比较微弱,暴雨及以上有上升的趋势。（3）印江县近49a汛期总降水量与汛期最高温度、平均温度呈显著的负相关,月份上与8月最为密切, 7月次之,与其他月的温度相关性不大。不同量级降水量占总降水量的百分比,随日平均、最高气温的升高都呈先上升后下降的趋势,各量级降水的百分比的峰值都有各自的温度区间。
|
| 关 键 词： | 印江县 汛期降水 气候特征 气温 相关性 |
| 收稿时间： | 2019/11/28 0:00:00 |
| 修稿时间： | 2020/4/2 0:00:00 |
Interdecadal Characteristics of Rainfall in Flood Season and Its Relation with Temperature in Yinjiang County |
| |
| Authors: | fangqiyun dairuihu duke lilingyun and xiechunyan |
| |
| Institution: | Meteorological Bureau of Tujia and Miao Autonomous County of Yinjiang,Meteorological Bureau of Tujia and Miao Autonomous County of Yinjiang,Meteorological Bureau of Tujia and Miao Autonomous County of Yinjiang,Meteorological Bureau of Tujia and Miao Autonomous County of Yinjiang,Meteorological Bureau of Tujia and Miao Autonomous County of Yinjiang |
| |
| Abstract: | Based on the data of daily precipitation, daily average, maximum and minimum temperature in the flood season (may September) from 1970 to 2018 at Yinjiang meteorological observation station, the interdecadal characteristics of precipitation in the flood season in Yinjiang county are studied by using linear tendency estimation, moving average method, Mann Kendall trend method and Morlet wavelet analysis, and the correlation analysis and t-analysis are used The relationship between precipitation and temperature in flood season is studied by means of test. The results show that: (1) the total precipitation of Yinjiang County in recent 49A flood season has no significant increase trend, showing the characteristics of "increase decrease" alternation. In the evolution of the chronological scale, four types of periodic change scales, 20-35a, 10-19a, 7-9a and 2-4a, play an important role together, of which 27a is the first main cycle and 9A is the second. (2) In recent 49 years, June, July and August contributed the most to the total precipitation in flood season, and the change trend was basically the same as the total precipitation; the annual total precipitation of small, moderate and heavy rain decreased, in which the moderate rain decreased weakly; the rainstorm and above increased. The percentage of small rain and moderate rain shows a downward trend, and the heavy rain with the largest percentage also shows a downward trend, but it is relatively weak, and the heavy rain and above have an upward trend. (3) In recent 49 years, the total precipitation of Yinjiang county has a significant negative correlation with the highest temperature and average temperature in flood season, the highest in August, the second in July, and the least in other months. With the increase of daily average and maximum temperature, the percentage of precipitation of different levels in the total precipitation tends to increase first and then decrease. The peak value of the percentage of precipitation of each level has its own temperature range |
| |
| Keywords: | Yinjiang County Rainfall in Flood Season Climate Characteristics Temperature Relevance |
|
| 点击此处可从《》浏览原始摘要信息 |
| 点击此处可从《》下载免费的PDF全文 |
|
