近50年桂西北地区农业气候生产力时空变化特征——以河池为例

Temporal and spatial variation characteristics of agro-climatic productivity in northwest Guangxi in recent 50 years-Take Hechi as an example

以河池市为例,利用1971—2020年该市平均气温、降水量等气象观测资料,使用Thornthwaite Memorial模型等方法研究了河池市农业气候生产力时空变化特征。结果表明,近50a河池市平均气温整体呈一定的上升趋势,升温速率平均为0.153℃·(10a)^(-1);年总降水量呈微弱增加趋势,变化速率为17.01mm·(10a)^(-1);农业气候生产力总体呈上升趋势,其变化速率为10.401(kg)·(m^(2)·a)^(-1)·(10a)^(-1),且距平波动较大,正距平年份多于负距平年份,空间分布为西低东高,倾向率呈自西向东逐渐增加的特征。

Taking Hechi City as an example,this paper studied the temporal and spatial variation characteristics of agro-climatic productivity in Hechi by using the Thornthwaite Memorial model and other meteorological observation data such as average temperature and precipitation in recent 50 years.The results show that the average temperature in Hechi has a certain upward trend from 1971 to 2020,with an average warming rate of 0.153℃·(10a)^(-1).The annual total precipitation shows a slight increasing trend with a changing rate o17.01mm·(10a)^(-1).The agricultural climatic productivity shows an upward trend with a variation rate of 10.401(kg)·(m^(2)·a)^(-1)·(10a)^(-1).The anomaly fluctuates greatly,the positive anomaly years are more than the negative anomaly years.The spatial distribution is lower in the west and higher in the east,and the trend rate gradually increases from west to east.