论文

垂直螺旋度的拓展研究及应用

  • 岳彩军 ,
  • 曹钰 ,
  • 李小凡
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  • 中国气象局上海台风研究所, 上海 200030;2. 上海市浦东新区气象局, 上海 200135;3. 浙江大学地球科学系, 杭州 310027

收稿日期: 2012-11-05

  网络出版日期: 2014-10-28

基金资助

国家自然科学基金项目(40875025,40875030,40775033,41175050);上海市自然科学基金项目(08ZR1422900);中国气象局2009年气象新技术推广重点项目(CMATG2009Z01);公益性行业(气象)科研专项(GYHY201306012)

Extensional Study and Application on Vertical Helicity

  • YUE Caijun ,
  • CAO Yu ,
  • LI Xiaofan
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  • Shanghai Typhoon Institute of the China Meteorological Administration, Shanghai 200030, China;2. Pudong New Weather Office, Shanghai Meteorological Bureau, Shanghai 200135, China;3. Department of Earth Sciences, Zhejiang University, Hangzhou 310027, China

Received date: 2012-11-05

  Online published: 2014-10-28

摘要

垂直螺旋度Hp由垂直速度和垂直涡度构成,反映涡度的垂直平流。通过尝试将Q矢量引入垂直螺旋度进行研究,即基于Q矢量散度和垂直涡度构造出一种新型垂直螺旋度HQHQHp的拓展形式,二者差别主要在于计算HQ时无需求解垂直速度。同时,结合一次典型的江淮梅雨锋气旋暴雨过程研究,结果表明,HQ对降水落区及降水强度水平分布的不均匀性均具有较好的反映能力,且揭示出暴雨上空垂直涡度平流呈倾斜分布特征。进一步分析表明,对于垂直涡度而言,HQ三维空间分布特征与辐合的Q矢量散度有更多的相似性,这在一定程度上反映出HQQ矢量散度联系更为密切。

本文引用格式

岳彩军 , 曹钰 , 李小凡 . 垂直螺旋度的拓展研究及应用[J]. 高原气象, 2014 , 33(5) : 1281 -1288 . DOI: 10.7522/j.issn.1000-0534.2013.00115

Abstract

Vertical helicity (termed as Hp) consists of vertical velocity and vertical vorticity, reflecting vertical advection of vorticity. Until now, vertical velocity can't be obtained directly by observations, which leads to calculate vertical helicity inconveniently. It is well known that Q vector is taken as an advanced tool for diagnosing vertical motion, and when vertical velocity in atmosphere has wave-like feature, there is proportional relationship of divergence of Q vector and vertical velocity, i.e., ▽·Q∝ω(ω is vertical velocity in p-coordinate), in other words, the divergence of Q vector can estimate vertical motion indirectly. The Q vector is drawn into study on helicity first time in this paper, specifically, a new type of vertical helicity (termed as HQ) is constructed on the basis of Q vector divergence and vertical vorticity. HQ is an extensional form of Hp, and they have the same physical meaning and similar diagnostic feature. The intrinsic difference between HQ and Hp is that the vertical velocity needed not to be given before calculating HQ. On some degree, the genesis of HQ firstly realizes organic fusion of the two advanced tools of helicity and Q vector, meanwhile, the diagnostic ability of HQ will be improved along with the developing of Q vector theory. The application of HQ to a typical Changjiang-Huaihe Meiyu front cyclone torrential rainfall shows that HQ has a good reflecting ability to synchronous precipitation intensity, occurring region and their inhomogeneities, and discloses the characteristics of vertical vorticity advection tilting northwards with height over torrential rainfall area. Further analysis indicates that there is obvious positive vertical vorticity and convergence of Q vector divergence preserving over precipitation area, and there is a good corresponding relationship between convergence region of Q vector divergence and occurring region of precipitation. HQ is the synthetic manifestation of roles from Q vector divergence and vertical vorticity, however, the three dimensions spatial distributional feature of HQ has more similar to counterpart of Q vector divergence with respect to vertical vorticity, which displays HQ relating more closely to Q vector divergence.

参考文献

[1]李耀东, 刘健文, 高守亭. 螺旋度在对流天气预报中的应用研究进展[J]. 气象科技, 2005, 33(1): 7-11.
[2]郑峰. 螺旋度应用研究综述[J]. 气象科技, 2006, 24(2): 119-123.
[3]岳彩军, 寿亦萱, 寿绍文, 等. 我国螺旋度的研究及应用[J]. 高原气象, 2006, 25(4): 754-762.
[4]孙淑清, 周玉淑. 近年来我国暴雨中尺度动力分析研究进展[J]. 大气科学, 2007, 31(6): 1171-1188.
[5]岳彩军, 郭煜, 寿绍文, 等. 螺旋度在我国多种灾害性天气研究中的应用进展[J]. 暴雨灾害, 2011, 30(2): 107-116.
[6]许东蓓, 任余龙, 李文莉, 等. “4.29”中国西北强沙尘暴数值模拟及螺旋度分析[J]. 高原气象, 2011, 30(1): 115-124.
[7]井喜, 高青云, 杨静, 等. 两个不同降水量级的MCC对比分析[J]. 高原气象, 2011, 30(2): 328-338.
[8]黄楚惠, 李国平, 牛金龙, 等. 一次楚惠高原低涡东移引发四川盆地强降水的湿螺旋度分析[J]. 高原气象, 2011, 30(6): 1427-1434.
[9]曹钰, 苗春生, 岳彩军, 等. 引入对流凝结潜热作用对非均匀饱和大气中非地转湿Q矢量的改进研究[J]. 高原气象,2012, 31(1): 76-86.
[10]吴木贵, 张信华, 傅伟辉, 等. 2010年3月5日闽北经典超级单体风暴天气过程分析[J]. 高原气象, 2013, 32(1): 250-267, doi: 10.7522/j.issn.1000-0534.2013.00025.
[11]陆慧娟, 高守亭. 螺旋度及螺旋度方程的讨论[J]. 气象学报, 2003, 61(6): 684-691.
[12]吴宝俊, 许晨海, 刘延英, 等. 一次三峡大暴雨的地转螺旋度分析[J]. 气象科学, 1996, 16(2): 144-150.
[13]吴宝俊, 许晨海, 刘延英, 等. 螺旋度在分析一次三峡大暴雨中的应用[J]. 应用气象学报, 1996, 7(1): 108-112.
[14]张建海, 庞盛荣. 不同初始场对台风Khanum模拟效果的影响及其暴雨过程的螺旋度分析[J]. 海洋通报, 2007, 26(5): 27-34.
[15]李生艳, 丁治英, 周能. 0307号台风“伊布都”影响广西南部暴雨的数值模拟及诊断分析[J]. 台湾海峡, 2007, 26(2): 204-212.
[16]康志明, 罗金秀, 郭文华, 等. 2005年10月西藏高原特大暴雪成因分析[J]. 气象, 2007, 33(8): 60-67.
[17]马秀玲, 彭九慧, 杨雷斌, 等. 华北地区一次局地暴雪天气过程的诊断分析[J]. 干旱气象, 2008, 26(1): 64-68.
[18]陶健红, 王劲松, 冯建英. 螺旋度在一次强沙尘暴天气分析中的应用[J]. 中国沙漠, 2004, 24(1): 83-87.
[19]王劲松, 李耀辉, 康凤琴, 等. “4.12”沙尘暴天气的数值模拟及诊断分析[J]. 高原气象, 2004, 23(1): 89-96.
[20]申红喜, 李秀连, 石步鸠. 北京地区两次沙尘(暴)天气过程对比分析[J]. 气象, 2004, 30(2): 12-16.
[21]王建兵, 王振国, 李晓媛, 等. 甘南高原一次突发性强对流天气的诊断分析[J]. 干旱气象, 2007, 25(3): 54-60.
[22]姜俊玲, 魏鸣, 王日东. 一次多单体风暴的多普勒雷达特征分析[J]. 海洋预报, 2007, 24(2): 60-66.
[23]Kain J S, Weiss S J, Bright D R, et al. Some practical considerations regarding horizontal resolution in the first generation of operational convection-allowing NWP[J]. Wea Forecasting, 2008, 23(5): 931-952.
[24]冉令坤, 楚艳丽. 强降水过程中垂直螺旋度和散度通量及其拓展形式的诊断分析[J]. 物理学报, 2009, 58(11): 8094-8106.
[25]Dunn L B. Evaluation of vertical motion: Past, present, and future[J]. Wea Forecasting, 1991, 6(1): 65-73.
[26]岳彩军. 梅雨锋气旋暴雨的Q矢量分析: 个例研究[J]. 气象学报, 2008, 66(1): 35-49.
[27]岳彩军. “海棠”台风(2005)结构对其降水影响的Q矢量分解研究[J]. 高原气象, 2009, 28(6): 1348-1364.
[28]Yue C. The Q vector analysis of the heavy rainfall from Meiyu front cyclone: A case study[J]. Acta Meteor Sini, 2009, 66(1): 35-49.
[29]陶祖钰, 黄伟. 大暴雨过程中与急流相关气块的三维运动分析[J]. 气象学报, 1994, 52(3): 359-367.
[30]寿绍文, 李耀辉, 范可. 暴雨中尺度气旋发展的等熵面位涡分析[J]. 气象学报, 2001, 59(6): 560-568.
[31]Yue C, Shou S, Lin K, et al. Diagnosis of the heavy rain near a Meiyu front using the wet Q vector partitioning method[J]. Adv Atmos Sci, 2003, 20(1): 37-44.
[32]岳彩军, 李佳, 陈佩燕, 等. 湿Q矢量释用技术的改进研究[J]. 高原气象, 2013, 32(6): 1617-1625, doi: 10.7522/j.issn.1000-0534.2012.00155.
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