摘要
利用广西贵港市3个国家气象观测站1961-2020年逐日气象资料,分析贵港地区农业气候资源中热量强度(年平均气温、平均最低气温和平均最高气温)、长度(稳定通过10℃初日、终日和持续天数)和累积量(大于10℃活动积温),以及稳定通过10℃期间的日照时数和降水量的线性变化趋势、突变情况和周期变化规律。结果表明:(1)贵港市热量资源均呈显著上升趋势,年平均气温、平均最低气温、平均最高气温和大于10℃活动积温气候倾向率分别为0.198、0.266、0.170℃/10a和131.040℃d/10a,作物安全生长季显著延长,初日和持续天数气候倾向率为4.8d/10a和5.0d/10a,但日照时数和降水量未表现明显变化趋势;(2)年平均气温、平均最低气温、平均最高气温和大于10℃有效积温突变时间为2000年,初日和持续日数突变时间为1996年,热量资源突变后较突变前显著增加;(3)农业气候资源以4年尺度显著周期变化为主,发生时段集中在1980-2005年,其中,降水量的小波功率谱能量最强。
The daily meteorological data from three national meteorological stations in Guigang,Guangxi from 1961 to 2020 was used to analyze the heat intensity(annual average temperature,average minimum temperature,average maximum temperature),heat length(initial day,final day and duration days of the temperature that is steadily greater than 10°C),heat accumulation(active cumulative temperature above10°C),as well as the linear trend,abrupt change and periodic change of sunshine hours and precipitation during the period when the temperature is steadily greater than 10°C in Guigang areas by using the least square method,Mann-Kendall test and Morlet wavelet analysis.The results showed that the heat resources had a significant upward trend in Guigang,with the annual average minimum temperature,average minimum temperature,average maximum temperature and active cumulative temperature above10°C rising at the rate of 0.198°C/10 a,0.266°C/10 a,0.170°C/10 a and 131.040°C/10 a,respectively.The safe growing season of crops is significantly prolonged,with the initial day and duration days of the temperature steadily above 10°C increasing at the respective rates of 4.8 day/10 a and 5.0 days/10 a,while the sunshine hours and precipitation did not show a significant change.The abrupt change in annual average temperature,average minimum temperature,average maximum temperature and active cumulative temperature above 10°C occurred in 2000.The abrupt change of the initial day and duration days happened in 1996.The heat resources increased significantly after the abrupt change.The agricultural climate resources were dominated by a significant periodic change on a 4 years scale,which occurred mainly in 1980-2005,during which the power in the Morlet wavelet power spectrum of precipitation was much higher.
作者
蒙小寒
黄维
莫申萍
梁虹
王盛繁
MENG Xiaohan;HUANG Wei;MO Shenping;LIANG Hong;WANG Shengfan(Guigang Meteorological Bureau,Guigang,Guangxi 537100,China;Liuzhou Agrometeorological Experimental Station,Liuzhou,Guangxi 545003,China)
出处
《热带农业科学》
2021年第11期93-99,共7页
Chinese Journal of Tropical Agriculture
基金
广西气象局气象科研计划面上项目“基于智能网格预报产品的广西物流气象应用研究”(No.桂气科2020M06)。
关键词
贵港市
农业气候资源
变化趋势
Guigang
agricultural climate resources
change trend
