頁籤選單縮合
| 題 名 | 2000~2014年彰師大氣候特徵分析=Climatological Characteristics in NCUE during 2000~2014 |
|---|---|
| 作 者 | 涂建翊; 許水德; | 書刊名 | 國立彰化師範大學文學院學報 |
| 卷 期 | 12 2015.09[民104.09] |
| 頁 次 | 頁85-102 |
| 分類號 | 328.8 |
| 關鍵詞 | 彰師大; 季節循環; 日循環; 極端事件; NCUE; Seasonal cycle; Diurnal cycle; Extreme event; |
| 語 文 | 中文(Chinese) |
| 中文摘要 | 彰師大自動氣象站設立於1997年11月,為氣象局合作測站之一,提供彰化市穩定且即時的氣象觀測服務。本研究特別針對該氣象站所觀測之重要氣象參數進行季節循環、日循環以及極端天氣事件的分析,希望讓大家了解本地的氣候特徵。長期資料統計結果顯示,本地年平均日照時數為 5.6小時,氣溫 23.4℃,降雨日數84天,相對溼度 72%,年總降雨量為 1,145毫米,主要降雨出現在兩時期,其一為5、6月的梅雨季,另一時期則為 7自9月的颱風季,兩時期的降雨量約占年總降雨量的 76%。從日循環來看,氣壓呈現明顯的半日波特徵,高值出現在上午和晚上10時左右,低值則出現在清晨和下午 4時左右。最高溫通常出現在 11-14時之間,最低溫則以清晨 5-6時為主,24時次之。白天風速高於晚上,風向則以西北風和北風為主。統計過去 15年的觀測資料發現,彰化地區的極端天氣發生,主要由颱風和強烈大陸冷高壓南移所造成。最大日降雨量達 360毫米,最大時雨量為 68毫米,最高溫38.8℃,最低溫僅有6.7℃。 |
| 英文摘要 | The ground observations at National Changhua University of Education (NCUE), one of the stations collaborated with the Central Weather Bureau (CWB) has been automatically operated since November 1997. Based on the observations, the climatology of diurnal cycle, seasonal cycle and extreme weather events have been examined in this study. According to the analysis, the annual average of sunshine duration is about 5.6 hours. The surface air temperature and the relative humidity is 23.4℃and 72%, respectively. For the precipitation, the total number of rainy days at station is about 84 days, while the total annual rainfall is 1,145mm. The major wet seasons including Meiyu season (from May to June), and typhoon season (from July to September) mainly occur in summer. The rainfall during these periods accounts for 76% of the total rainfall over a year. For the diurnal fluctuation, the surface pressure has a significantly semi-diurnal pattern with the maxima around 10 A.M. and 10 P.M. and with minima near 4 A.M. and 4 P.M. as well. The highest air temperature may occur between 11A.M. and 2:00 P.M., while the lowest air temperature usually occurs between 5:00 and 6:00 A.M. For the wind field analysis, the wind speed is greater in daytime than that in nighttime. The prevailing wind direction is also found a tendency to between north and northwest. According to the observations in the past fifteen years, the extreme weather events are mainly caused by typhoon and strong Siberian high. Due to the interaction with these systems, the highest amounts of daily and hourly rainfall generally reach 360mm and 68mm, respectively. Meanwhile, the maximum and minimum temperatures are about 38.8℃ and 6.7℃ during the events. |
本系統中英文摘要資訊取自各篇刊載內容。