摘要
采用趋势分析法、Mann-Kendall突变分析法、小波分析法和时态GIS对三江平原1952—2012年间的61 a降水量的时空变异特征进行分析。结果表明:时间上,5个主要行政区的降水量序列在时间整体上变化趋势不明显,而在时间序列内部存在不同突变趋势,存在以28、22、15、6 a 4个时段为主周期的波动状态;整个三江平原降水量序列在时间整体上变化趋势也不明显,但在时间序列内部表现出突变趋势,即1955年开始呈下降趋势,至1979年开始呈上升趋势,到1997年又呈下降趋势,存在与各行政分区主周期相同的波动状态。空间上,三江平原降水量空间分布变化趋势表现出明显的差异性,即1952—1954年从北到南呈现中间多两端少的变化趋势,而1955—1978年从北到南呈现两端多中间少的变化趋势,1979—2012年也呈现北多南少、东多西少的变化趋势。5个主要行政区及三江平原1952—1954年和1997—2012年两个时段内的多年平均降水量均少于1955—1996年间的多年平均降水量。
Trends analysis method, wavelet analysis, Mann - Kendall abrupt change test and temporal GIS were used to analyze the spatial distribution characteristics and temporal trends of precipitation based on the annual precipitation observed data from 1952 to 2012 in Sanjiang Plain. The analysis results showed that there was no obvious change trend during the whole time span with several internal variation trends for annual precipitation in five administrative areas, which meant that it existed four main periods of 28, 22, 15 and 6 years for annual precipitation series. For the whole series of precipitation in the Sanjiang Plain, there were no obvious change trends with the following internal variation trends, that was, there was a downward trend from 1955 to 1979, after then an upward trend until 1997, and then there was a downward trend in the remained annual precipitation series. There was an obvious spacial variation for precipitation. It showed that the precipitation in the middle of Sanjiang Plain was more than that in the two sides where from the north to the south during 1952 to 1954, while there was less precipitation in the middle than that in both sides where from the north to the south during 1955 to 1978, and then there was a trend of more precipitation in the north and east, and less precipitation in the south and west in Sanjiang Plain during 1979 to 2012. In addition, for both the whole Sanjiang Plain and each administrative area, the annual average precipitation amounts during 1952--1954 and 199712012 were more than that during 1955--1996.
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2015年第11期337-344,共8页
Transactions of the Chinese Society for Agricultural Machinery
基金
国家自然科学基金资助项目(51109036
51179032)
黑龙江省自然科学基金资助项目(E2015024)
水利部公益性行业科研专项资助项目(201301096)
黑龙江省级领军人才梯队后备带头人资助项目(500001)
黑龙江省博士后科研启动资金资助项目(LBH-Q12147)
东北农业大学SIPT计划大学生创新训练资助项目
东北农业大学研究生创新资助项目(yjscx14071
yjscx14070)
