摘要
南岭山地位于广东、广西、湖南、江西、福建五省的交界处,是我国南方重要的生态屏障带。认识南岭地区降水的时空分布特征,对于深入了解南岭山地生态屏障作用及气候变化条件下该区域的降水规律意义重大。利用1968—2015年中国南岭区域14个气象站的逐月降水资料,主要采用Mann-Kendall统计检验法、聚类分析法、小波分析方法和Kriging插值法,研究了南岭地区48年内降水的时空分布特征。结果表明:①南岭区域的多年平均雨量分布在1203.19 mm到2019.56 mm之间,总体上来看,南岭地区降雨量主要集中在南部,自南向北呈减少趋势,降水量随着经度增加而增加,随纬度增加而减少,且随海拔的升高而减少。②通过对14个站点的48a降雨情况进行聚类分析可将南岭全区域划分为5个子区域,全区域以及5个子区域春季、秋季的降水量呈下降趋势,夏季和冬季呈上升趋势,汛期大多表现出下降趋势,非汛期大多呈上升趋势,但除了南岭最西部的子区域的汛期降雨量表现出显著的下降趋势以外,其余区域的各时间段降雨量趋势变化均不显著。③全区域和5个子区域的年均降雨量在48 a内没有发生显著的突变,人类活动以及气候变化对于南岭地区的降水尚未造成非常明显的影响。④南岭地区降雨序列存在多个不同时间尺度的周期,仅有2 a和13 a通过了85%的红噪声检验, 13 a周期所对应的小波方差峰值较2 a的峰值更高,因此可将13a作为南岭地区降雨量变化的主周期。研究结果可为南岭地区的农业、林业、旅游业发展决策和生态屏障作用评价提供参考依据。
The Nanling is a mountain range that stretches across five provinces(Hunan, Jiangxi, Guangxi, Guangdong, and Fujian) in China, and it plays an important role as a boundary between tropical and subtropical regions. Understanding the spatial and temporal distribution characteristics of precipitation in Nanling is of great significance for further discovering the precipitation law of Nanling mountains under the conditions of climate change. Based on monthly precipitation data recorded at 14 meteorological stations in the Nanling area from 1968 to 2015, this study used the Mann–Kendall statistical test, wavelet analysis, and Kriging interpolation to analyze the spatial and temporal distribution characteristics of precipitation in the Nanling area. The results showed that rainfall was generally more abundant in the southwest of the area, decreasing from west to east and from south to north, but also decreasing with elevation. Cluster analysis indicated the area could be divided into five subregions, and that one year could not only be divided into spring(Mar.–May), summer(June–Aug.),autumn(Sept.–Nov.), and winter(Dec.–Feb.) but also into the flood season(Apr.–Sept.) and the non-flood season(Oct.–Mar.) as well. The mutative trends of annual seasonal precipitation and precipitation in the flood and non-flood seasons over the entire region, as well as the five subregions, were found not significant. Many different timescales of precipitation sequence were identified for the Nanling area, of which 13 years could be considered the primary period. The research results can provide reference for the development of agriculture,forestry and tourism in Nanling, and lay a foundation for the evaluation of ecological barrier function of Nanling.
作者
宗天韵
周玮莹
周平
ZONG Tianyun;ZHOU Weiying;ZHOU Ping(Guangzhou Institute of Geography,Guangzhou 510070,China;School of Life Sciences,Sun Yat-sen University,Guangzhou 510275,China)
出处
《生态科学》
CSCD
2019年第2期182-190,共9页
Ecological Science
基金
广东省科学院能力建设专项(2017GDASCX-0701)
南岭观测研究(2018B030324001
2019GDASYL-0401001)
