| 宣城春烟最佳移栽期天气聚类分析 |
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| 引用本文： | 吴有训,王周青,汪小逸,应月琴,潘荣山.宣城春烟最佳移栽期天气聚类分析[J].安徽农业科学,2012,40(24):12134-12136. |
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| 作者姓名： | 吴有训 王周青 汪小逸 应月琴 潘荣山 |
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| 作者单位： | 安徽省宣城市气象局,安徽宣城,242000 |
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| 基金项目： | 中国气象局气象新技术推广项目(CMATG2005M34) |
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| 摘 要： | 利用1981～2010年安徽宣城单站地面气象观测资料和美国NCEP/NCAR全球日平均分析场资料,对宣城春烟最佳移栽期的日平均气温和日平均气压进行聚类分析。结果表明,春烟最佳移栽期出现前压、温曲线交替波动变化,一般气温降到极小值的第2天出现最佳移栽期,气温继续波动性上升,气压反位相变化;少数情况最佳移栽期出现以后温压曲线交替波动变化。最佳移栽期对应的500 hPa日平均温、压场上,西太平洋副热带高压呈东西带状分布,副高北界在20°N附近;中纬度盛行纬向环流,除Ⅲ类、Ⅴ类有明显的槽脊活动以外,其余均不明显;Ⅴ类测站上空有暖温度平流,其余均无温度平流影响。
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| 关 键 词： | 春烟 最佳移栽期 天气 聚类分析 宣城 |
Cluster Analysis on the Weather of the Best Transplanting Period of Spring Tobacco in Xuancheng |
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| Institution: | WU You-xun et al(Xuancheng Meteorological Bureau,Xuancheng,Anhui 242000) |
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| Abstract: | According to the meteorological data of Xuancheng from 1981 to 2010 and the NCEP/NCAR day-to-day reanalysis data,the daily average temperature and average atmospheric pressure were cluster analyzed in the best transplanting period of spring tobacco in Xuancheng.As indicated by the result,the alternating fluctuations of atmospheric pressure and temperature curve appear before the best transplanting period of spring tobacco,the best transplanting period usually appears in the nex day after the temperature dropping to a minimum value,the temperature continues to rise in volatility,and the atmospheric pressure showes an anti-phase change;in few cases,the temperature and pressure curves present alternating fluctuations after the best transplanting period.The corresponding average temperature,the average atmospheric pressure at 500 hPa and west Pacific subtropical high show an east-west band distribution,the northern boundary of subtropical high is around 20° N.The zonal circulation prevails in the mid-latitude,only type Ⅲ and Ⅴ have obvious trough and ridge activities,and warm advection appears only in the sky above V station. |
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| Keywords: | Spring tobacco The best transplanting period Weather Cluster analysis Xuancheng |
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