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沙瓦特指数的一种迭代算法

王学忠 胡邦辉 吕梅 邹力 倪东鸿

王学忠, 胡邦辉, 吕梅, 等. 沙瓦特指数的一种迭代算法. 应用气象学报, 2009, 20(4): 486-491..
引用本文: 王学忠, 胡邦辉, 吕梅, 等. 沙瓦特指数的一种迭代算法. 应用气象学报, 2009, 20(4): 486-491.
Wang Xuezhong, Hu Banghui, Lv Mei, et al. Computation of showalter index by an iterative method. J Appl Meteor Sci, 2009, 20(4): 486-491.
Citation: Wang Xuezhong, Hu Banghui, Lv Mei, et al. Computation of showalter index by an iterative method. J Appl Meteor Sci, 2009, 20(4): 486-491.

沙瓦特指数的一种迭代算法

资助项目: 

江苏省气象灾害重点实验室项目 KLE050304

中国气象局气象新技术推广项目 CMATG2006M02

Computation of Showalter Index by an Iterative Method

  • 摘要: 为了提高沙瓦特指数的计算精度, 在沙瓦特指数计算方案中引入二分法:先用于计算抬升凝结高度上的要素, 进而计算假相当位温, 再依据假相当位温守恒性质用于计算500 hPa气块温度。与其他方案对比表明, 该迭代算法计算的沙瓦特指数精度较高; 与查表法所得的气块温度对比表明, 该迭代算法得到的气块温度的最大绝对误差为1.36 ℃, 平均误差 (-0.68 ℃) 与平均绝对误差 (0.69 ℃) 数值接近; 迭代算法与查表法之间以系统性偏差为主; 此外, 该迭代算法计算量小, 收敛速度快, 具有推广应用价值。
  • 图  1  二分法与查表法计算的500 hPa气块温度对比 (a) 查表法, (b) 二分法, (c) 二分法与查表法的差值

    (阴影区:负值)

    Fig. 1  500 hPa parcel temperatures computed by table interpelating methods (a) and bisection (b), and their differences (c)

    (shaded region:negative value)

    表  1  多站点计算的沙瓦特指数及其与查表或点绘求得的沙瓦特指数对比 (单位:℃)

    Table  1  Comparison between Showalter indexes computed by bisection method and those by table/chart interpolating at multi-stations (unit:℃)

    表  2  以查表法为参照二分法及其均值订正后计算的500 hPa气块温度的统计对比 (单位:℃)

    Table  2  Statistical error features of 500 hPa parcel temperatures computed by bisection and its mean value correction referring to those of table interpolating (unit:℃)

  • [1] Showalter A K. A stability index for thunderstorm forecasting. Bull Amer Meteoro Soc, 1953, 34:250-252.
    [2] Schaefer J T.Severe thunderstorm forecasting: A historical perspective.Wea Forecasting, 1986, 1:164-189. doi:  10.1175/1520-0434(1986)001<0164:STFAHP>2.0.CO;2
    [3] 刘健文, 郭虎, 李耀东, 等.天气分析预报物理量计算基础.北京:气象出版社, 2005:77-86.
    [4] Curtis R C, Panofsky H A.The relation between large-scale vertical motion and weather in summer.Bull Amer Meteor Soc, 1958, 39:521-531.
    [5] Hovanec R D, Horn L H.Static stability and the 300 mb isotach field in the Colorado cyclogenesis area.Mon Wea Rev, 1975, 103:628-638. doi:  10.1175/1520-0493(1975)103<0628:SSATMI>2.0.CO;2
    [6] Huntrieser H, Schiesser H H, Schmid W, et al.Comparison of traditional and newly developed thunderstorm indices for Switzerland.Wea Forecasting, 1997, 12:108-125. doi:  10.1175/1520-0434(1997)012<0108:COTAND>2.0.CO;2
    [7] Galway J G.The lifted index as a predictor of latent instability.Bull Amer Meteor Soc, 1956, 37:528-529. http://www.scirp.org/reference/ReferencesPapers.aspx?ReferenceID=396819
    [8] Prosser N E, Foster D S.Upper air sounding analysis by use of an electronic computer.J Appl Meteor, 1966, 5:296-300. doi:  10.1175/1520-0450(1966)005<0296:UASABU>2.0.CO;2
    [9] Peppier R A, Lamb P J.Tropospheric static stability and central North American growing season rainfall.Mon Wea Rev, 1989, 117:1156-1180. doi:  10.1175/1520-0493(1989)117<1156:TSSACN>2.0.CO;2
    [10] Sanders F.Temperatures of air parcels lifted from the surface :Background, application and nomograms.Wea Forecasting, 1986, 1:190-205. doi:  10.1175/1520-0434(1986)001<0190:TOAPLF>2.0.CO;2
    [11] Haklander J, Delden A V.Thunderstorm predictors and their forecast skill for the Netherlands.Atmos Res, 2003, 67-68:273-299. doi:  10.1016/S0169-8095(03)00056-5
    [12] Gary L A, Peter H H, Paul T S, et al.Atmospheric Sciences Section Illinois State Water Survey Final Report, Illinois Precipitation Enhancement (Phase Ⅰ), Design and Evaluation Techniques for High Plains Cooperative Program, 1977.
    [13] 寿绍文, 励申申, 王善华, 等.天气学分析.北京:气象出版社, 2002:179.
    [14] 张年成, 朱俊峰, 陈红萍, 等.沙氏指数计算方案探讨.气象科技, 2007, 35(2):171-174. http://www.cnki.com.cn/Article/CJFDTOTAL-QXKJ200702002.htm
    [15] 乔全明, 阮旭春.天气分析.北京:气象出版社, 1988:41-75.
    [16] Emanuel K A.Atmospheric Convection.New York:Oxford University Press, 1994:329-391.
    [17] Moncrieff M W, Miller M J.The dynamics and simulation of tropical cumulonimbus and squall lines.Quart J Roy Meteor Soc, 1976, 102:373-394. doi:  10.1002/(ISSN)1477-870X
    [18] Colby F P Jr.Convective inhibition as a predictor of convection during AVE-SESAME Ⅱ. Mon Wea Rev, 1984, 112: 2239-2252. doi:  10.1175/1520-0493(1984)112<2239:CIAAPO>2.0.CO;2
    [19] Miller R C.Notes on Analysis and Severe Storm Forecasting Procedures of the Air Force Global Weather Center.Tech Rep 200(Rev).AWS:U S Air Force, 1972.
    [20] Jacovides C P, Yonetani T.An evaluation of stability indices for thunderstorm prediction in Greater Cyprus.Wea Forecasing, 1990, 5:559-569. doi:  10.1175/1520-0434(1990)005<0559:AEOSIF>2.0.CO;2
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出版历程
  • 收稿日期:  2008-05-08
  • 修回日期:  2009-02-13
  • 刊出日期:  2009-08-31

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