1961—2022年廣東省大風(fēng)天氣季節(jié)變化特征分析

doi:10.12306/2023jms.0085

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1961—2022年廣東省大風(fēng)天氣季節(jié)變化特征分析
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                        10.12306/2023jms.0085
                    
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中圖分類號:P468.026
基金項(xiàng)目:國家自然科學(xué)基金資助項(xiàng)目(42175172;41975134)

Analysis of seasonal variation characteristics of gale weather in Guangdong Province from 1961 to 2022

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利用1961—2022年廣東省86個(gè)氣象站風(fēng)速資料,采用集中度、集中期等氣象統(tǒng)計(jì)學(xué)方法,分析了廣東大風(fēng)天氣的季節(jié)變化特征及年際變化規(guī)律。結(jié)果表明,廣東大風(fēng)天氣的頻發(fā)區(qū)位于南部沿海和中部山區(qū)。廣東大風(fēng)日數(shù)在1971—2000年整體呈下降趨勢,2000年后出現(xiàn)轉(zhuǎn)折性增長。大風(fēng)季節(jié)變化的區(qū)域特征明顯:表現(xiàn)為粵北西北和東北地區(qū)的大風(fēng)集中度最高,而粵西、粵中和粵東南部和粵北西南地區(qū)的大風(fēng)集中度較小;粵西南部、粵中中部、粵北西南和中部地區(qū)的大風(fēng)天氣主要集中在夏季,其余地區(qū)多集中在春末。另外,大風(fēng)年內(nèi)季節(jié)變化特征存在年際和年代際尺度演變,表現(xiàn)為:近62 a廣東大風(fēng)頻發(fā)區(qū)的大風(fēng)天氣年內(nèi)集中程度顯著增大,集中時(shí)期的年際變幅逐漸減小,但趨勢變化不顯著。分析發(fā)現(xiàn),廣東地區(qū)的強(qiáng)對流天氣、冷空氣過程、熱帶氣旋等天氣過程,以及西太平洋副熱帶高壓、極渦等大氣環(huán)流是影響大風(fēng)日數(shù)及其集中度時(shí)空分布的重要因素。

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Based on the wind speed data from 86 meteorological stations in Guangdong Province from 1961 to 2022, the seasonal variation characteristics and interannual variation of gales in Guangdong were analyzed by using meteorological statistical methods such as concentration degree and concentration period. Results show that gales in Guangdong predominantly occur along the southern coastline and in the central and northern regions of the province. A decreasing trend in gale days was observed in Guangdong from 1971 to 2000, followed by an increasing trend after 2000.Regional patterns were observed in the seasonal variation of gales: gales in the western and central-eastern mountainous regions of Guangdong peak around mid-May, whereas those in the southern coastal areas predominantly occur towards late June.Additionally, interannual evolutions in the seasonal variation of gales have been observed: over the past 62 years, a significant increase in the Gale Concentration Degree (GCD) was noted in areas of Guangdong frequently experiencing gales, and a gradual decrease was observed in the interannual variability of the Gale Concentration Period (GCP). The analysis indicates that in Guangdong, strong convective weather, cold air processes, and tropical cyclones, along with atmospheric circulations like the western Pacific sub-high and the polar vortex, significantly influence the spatial and temporal distribution of gales and the GCD.

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黃君敏,侍國瑞,張錄軍,魏瑞增.1961—2022年廣東省大風(fēng)天氣季節(jié)變化特征分析.氣象科學(xué),2024,44(6):1084-1091 HUANG Junmin, SHI Guorui, ZHANG Lujun, WEI Ruizeng. Analysis of seasonal variation characteristics of gale weather in Guangdong Province from 1961 to 2022. Journal of the Meteorological Sciences,2024,44(6):1084-1091

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收稿日期:2016-06-01
最后修改日期:2023-11-29
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在線發(fā)布日期: 2025-01-08
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