沙漠与绿洲气象
沙漠與綠洲氣象
사막여록주기상
DESERT AND OASIS METEOROLOGY
2015年
3期
44-49
,共6页
胡义成%伊里哈木%王秋香%魏文寿%古丽格娜
鬍義成%伊裏哈木%王鞦香%魏文壽%古麗格娜
호의성%이리합목%왕추향%위문수%고려격나
乌鲁木齐%大气边界层结构%L波段雷达%四季特征
烏魯木齊%大氣邊界層結構%L波段雷達%四季特徵
오로목제%대기변계층결구%L파단뢰체%사계특정
Urumqi%atmospheric boundary layer structure%L-band radar system%seasonal characteristics
利用乌鲁木齐市2011—2012年08时、20时L波段(1型)雷达探测的高空资料,分析了乌鲁木齐边界层内气温、风向、风速和相对湿度的垂直分布及其时间变化特征。结果表明:边界层内温度廓线的日变化和季节变化比较显著;各月均有逆温出现,且08时较20时更易出现逆温,20时只有冬季出现脱地逆温,冬季08时逆温层厚度较厚且强度最大。边界层内夏、冬两季风速随高度变化波动较大,春、秋两季变化较小。冬季在距地1000 m附近风速明显大于其它3个季节。地面层春、夏、秋三季08时盛行西南偏南风,冬季盛行偏东风和西南风;20时春季盛行东北风,夏秋盛行偏北风,冬季则盛行东风。随高度增加,大气环流对风的影响逐渐增强,至2500 m附近逐渐转换为西北风;日风向的变化具有明显的山谷风特点。08、20时的相对湿度冬季最大,夏季最小,且随高度增加,春、夏两季08、20时相对湿度的变化较大。
利用烏魯木齊市2011—2012年08時、20時L波段(1型)雷達探測的高空資料,分析瞭烏魯木齊邊界層內氣溫、風嚮、風速和相對濕度的垂直分佈及其時間變化特徵。結果錶明:邊界層內溫度廓線的日變化和季節變化比較顯著;各月均有逆溫齣現,且08時較20時更易齣現逆溫,20時隻有鼕季齣現脫地逆溫,鼕季08時逆溫層厚度較厚且彊度最大。邊界層內夏、鼕兩季風速隨高度變化波動較大,春、鞦兩季變化較小。鼕季在距地1000 m附近風速明顯大于其它3箇季節。地麵層春、夏、鞦三季08時盛行西南偏南風,鼕季盛行偏東風和西南風;20時春季盛行東北風,夏鞦盛行偏北風,鼕季則盛行東風。隨高度增加,大氣環流對風的影響逐漸增彊,至2500 m附近逐漸轉換為西北風;日風嚮的變化具有明顯的山穀風特點。08、20時的相對濕度鼕季最大,夏季最小,且隨高度增加,春、夏兩季08、20時相對濕度的變化較大。
이용오로목제시2011—2012년08시、20시L파단(1형)뢰체탐측적고공자료,분석료오로목제변계층내기온、풍향、풍속화상대습도적수직분포급기시간변화특정。결과표명:변계층내온도곽선적일변화화계절변화비교현저;각월균유역온출현,차08시교20시경역출현역온,20시지유동계출현탈지역온,동계08시역온층후도교후차강도최대。변계층내하、동량계풍속수고도변화파동교대,춘、추량계변화교소。동계재거지1000 m부근풍속명현대우기타3개계절。지면층춘、하、추삼계08시성행서남편남풍,동계성행편동풍화서남풍;20시춘계성행동북풍,하추성행편북풍,동계칙성행동풍。수고도증가,대기배류대풍적영향축점증강,지2500 m부근축점전환위서북풍;일풍향적변화구유명현적산곡풍특점。08、20시적상대습도동계최대,하계최소,차수고도증가,춘、하량계08、20시상대습도적변화교대。
Based on the L-band radar system data during 2011-2012, we built the atmospheric boundary layer structure database in Urumqi. Atmospheric boundary layer conditions such as vertical distribution and time variation characteristics of temperature, wind velocity, wind direction and humidity were analyzed. The results show that there were significant changes in daily and seasonal variations in profiles of temperature in atmospheric boundary layer below 1 500 m, and they were basically stabile above 1 500 m. There was temperature inversion in each month which occurs more in the morning (8:00)than in the evening (20:00),and generally thicker and the strongest temperature inversion occured in winter. The wind velocity had more change with altitude increase in summer and winter, and less in spring and autumn. The wind velocity near 1 000 m altitude was significantly greater than that of the other 3 seasons. The prevailing wind direction in surface layer was SSW in spring, summer, and autumn, and E, SW in winter in the morning, as well as NE in spring, N in summer, E in winter in the evening. The wind direction had a significant characteristics of mountain valley breeze. There was the highest humidity in winter, and the lowest in summer, as well as a higher variation with altitude change in spring and summer.