摘要
采用集合经验模分解方法,确定了斗门24个节气温度和时间的阈值,分析了各节气平均温度及其在季节循环中时间节点的演变趋势,并计算了各个节气下斗门气温、降水量等气象要素的多年节气平均分布及线性趋势变化。结果表明:季节循环中气温上升阶段的气候节气都有显著提前的趋势,气温下降阶段则具有显著推迟的趋势,主要是由气温季节循环的整体增暖造成的。各个节气气温均呈增温趋势,且大部分增温明显,农业种植可根据气温变化时间规律合理调整作物种植或收获时机以提高产量;清明至秋分节气期间累积降水量占全年总降水量的85.7%,对灌溉水量需求较大的作物生长节点需重点把握两个节气间的时间;养殖户可于平均风速较小的节气如立秋至白露期间,以及日照时数较短的春分临近时节,主动开展增氧作业,规避部分鱼群泛塘现象带来的损失。
Using the method of ensemble empirical mode decomposition, this work determines the threshold temperature and time of 24 solar terms for Doumen, analyzes the average temperature of of individual solar terms and their evolution tendency at various time nodes of the seasonal cycle, and computes the average distribution and linear tendency variation of such meteorological elements as temperature and precipitation amount for individual solar terms over multiple years. The results are shown as follows. In the seasonal cycle, the climatological solar term tends to advance as temperature rises and delay as it drops, both significantly, which is mainly caused by the overall warming of the seasonal cycle of temperature. Temperature shows an increasing trend at all solar terms and much so at most of them. To increase production, the planting or harvesting time of agricultural crops can be adjusted reasonably in accordance with the temporal pattern of temperature variation. During the time from the solar term of “Pure Brightness” to “Autumn Equinox”, accumulated precipitation amount takes up 85.7% of the annual total, making it necessary to grow crops that require much irrigation. From “Beginning of Autumn” to “White Dew”, average wind speed is relatively small, and as the “Spring Equinox” approaches, sunshine is relatively short, cultivating farmers are suggested to increase oxygen supply during the two periods to minimize economic losses due to shoals of fish appearing at the upper layer of ponds.
作者
钟成文
张伟康
简浩宇
雷振亮
陈佳涵
ZHONG Cheng-wen;ZHANG Wei-kang;JIAN Hao-yu;LEI Zhen-liang;CHEN Jia-han(Meteorological Bureau of Doumen District,Zhuhai,Zhuhai 519125)
出处
《广东气象》
2023年第1期27-31,共5页
Guangdong Meteorology
关键词
气候学
二十四节气
集合经验模分解
斗门
climatology
24 solar terms
ensemble empirical mode decomposition
Doumen
