WANG Min,REN Jianling,YI Xiaoyuan,et al.Characteristics of Multiple Scales of Precipitation from 1901 to 2016 in the Region of Tianjin[J].Research of Soil and Water Conservation,2020,27(05):154-159.
1901-2016年天津地区降水的多尺度特征
- Title:
- Characteristics of Multiple Scales of Precipitation from 1901 to 2016 in the Region of Tianjin
- 文章编号:
- 1005-3409(2020)05-0154-06
- 分类号:
- P426.61
- 文献标志码:
- A
- 摘要:
- 基于1901—2016年天津地区降水观测数据及全球降水气候中心(Global Precipitation Climatology Centre,GPCC)、英国英吉利大学(Climate Rearsch Unit,CRU)研制的两套格点化月降水数据,利用taylor统计、时间变率、Ensemble Empirical Mode Decomposition(EEMD)等多种方法,分析了不同降水资料在天津的适用性,进而分析天津地区百年降水的多时间尺度、空间分布特征。结果表明:(1)1901—2016年GPCC比CRU降水数据更适用于天津地区。(2)天津地区1901—2016年降水的空间分布表现为“北多南少,东多西少”的趋势,时间变率呈“南正北负”的分布特征,其线性趋势较弱。(3)从天津降水距平百分率来看,其北部低于南部。(4)从多尺度变化来看,天津地区降水距平百分率南北部的年际变化较为相似,年代际变化存在差异性; 趋势项表明天津南、北部的降水距平百分率均表现为先增强后减弱的趋势,但北部的增幅弱于天津南部。
- Abstract:
- Based on the reanalysis datasets and observed dataset of in Tianjin in the period 1901—2016, we used the integrated approaches that combine Taylor statistic, time variability, EEMD, to analysis the spatial-temporal characteristics of precipitation. The main conclusions are as follows.(1)Compared with CRU data, GPCC data had more applicability in Tianjin region.(2)The annual precipitation decreased from south to north as well as from east to west in spatial distribution, the distribution of time variability in the north of Tianjin was negative, and was positive in the south of Tianjin.(3)The percentage of precipitation anomaly revealed that the drought frequency was lower in the north region than south region of Tianjin.(4)With respect to the variations of various scales in terms of the percentage of precipitation anomaly, it revealed that the annual variability was similar while the decadal time scales cycle was different; there was increasing tendency from 1901s to 1950s, then the decreasing tendency after 1960s in the north region of Tianjin, while the increasing tendency in the south region ended up until 1970.
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备注/Memo
收稿日期:2019-11-13修回日期:2020-01-09
资助项目:国家自然科学基金(41575049); 国家自然科学基金青年基金(41905132); 国家自然科学基金(41575063); 淮河流域气象开放研究基金暨安徽省大气科学与卫星遥感重点实验室开放基金(HRM201701)
第一作者:王敏(1992—),女,河北唐山人,助理工程师,硕士研究生,研究方向为灾害性天气及气候预测。E-mail:wmin820@126.com
通信作者:任建玲(1970—),女,天津人,副高级工程师,研究方向为气象数据分析、气候统计。E-mail:renjl@126.com