1710号台风“海棠”登陆后漳州市远距离暴雨的能量特征
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摘要
从能量角度分析台风和暴雨区显热能、潜热能和动能的时空分布特征,定量讨论台风强度长时间维持和暴雨区远距离降水突然增幅过程中能量加强的成因以及动能的补充途径。结果表明:(1)台风中心和暴雨区上空潜热能比显热能小一个量级,但潜热能平流明显大于显热能平流,潜热能对台风中心和暴雨区总能量增量的贡献大于显热能。(2)台风远距离暴雨发生时,暴雨区低层是一个深厚的潜热能大值区,凝结潜热释放有利于暴雨发生,低层是显热能和气温低值区,冷区的存在增加了暴雨区上空斜压不稳定,对暴雨具有增幅作用。(3)区域外能量的补充是"海棠"登陆后强度长时间维持的主要原因,西南风急流是显热能和潜热能补充台风的主要途径,潜热能增量远大于显热能增量。(4)"海棠"登陆后强度长时间维持导致西南急流加强,暴雨区低层显热能平流和潜热能平流也得到加强。暴雨区西边界纬向动能平流的加强、中高层动能的下传和斜压不稳定能量的转化使低层动能得到加强。低层动能加强、能量的积累和冷区的建立为台风远距离暴雨的发生提供能量、动力条件和不稳定条件。(5)台风远距离暴雨的发生具有前兆性,暴雨区低层出现正能量平流时间提前强降水发生时间约12 h。
This paper focused on the energy variations in the typhoon center and storm regions. The temporal and spatial distributions of apparent energy,latent energy and kinetic energy were investigated in the process of the typhoon's transition by means of energy analysis. The variations of the energies increase in the process of abrupt enhancement of remote precipitation and the long time maintenance of typhoon intensity were studied quantitatively. On the other hand,the source of the energy increase was discussed quantitatively in the typhoon center and storm regions. The main results were as follows:( 1) Though the magnitude of latent heat energy was less than that of apparent heat energy,the advection of latent heat energy was stronger than that of apparent heat energy. The contribution to typhoon certre and storm regions made by latent heat energy was larger than that made by apparent heat energy.( 2) A deep latent heat energy layer was in the lower-middle troposphere over the rainstorm regions when the remote typhoon rainstorm occurred. The released condensation latent heat was beneficial to the occurrence of the rainstorm. The low value region of apparent heat energy and air temperature in the lower level troposphere was favourable for the development of baroclinic instability potential energy and played a role in the enhancement of the precipitation.( 3) The main reasons of long time maintenance of the typhoon intensity was due to the extra regional energy supplement. The southwest wind jet was the main way to supplement typhoon energy by apparent heat energy and latent heat energy. The increment of latent heat energy was much larger than that of apparent heat energy.( 4) The long time maintenance of typhoon intensity strengthened the southwest low level jet. At the same time,the apparent energy advection and latent heat advection in the lower level troposphere were also strengthened in the rainstorm area. The kinetic energy in the lower troposphere in storm regions was enhanced by the incoming kinetic energy from the west boundary of the storm regions,by the downward transport of the kinetic energy and by the conversion of the baroclinic potential energy into the kinetic one. The low level kinetic energy enhancement,energy accumulation and cold area establishment in the rainstorm area provided energy,dynamic conditions and unstable conditions for the occurrence of remote typhoon rainstorm.( 5) There was a precursory signal about occurrence of remote typhoon rainstorm,the positive energy advection generation in the lower troposphere in the rainstorm area was about 12 hours ahead of the rainstorm.
This paper focused on the energy variations in the typhoon center and storm regions. The temporal and spatial distributions of apparent energy,latent energy and kinetic energy were investigated in the process of the typhoon's transition by means of energy analysis. The variations of the energies increase in the process of abrupt enhancement of remote precipitation and the long time maintenance of typhoon intensity were studied quantitatively. On the other hand,the source of the energy increase was discussed quantitatively in the typhoon center and storm regions. The main results were as follows:( 1) Though the magnitude of latent heat energy was less than that of apparent heat energy,the advection of latent heat energy was stronger than that of apparent heat energy. The contribution to typhoon certre and storm regions made by latent heat energy was larger than that made by apparent heat energy.( 2) A deep latent heat energy layer was in the lower-middle troposphere over the rainstorm regions when the remote typhoon rainstorm occurred. The released condensation latent heat was beneficial to the occurrence of the rainstorm. The low value region of apparent heat energy and air temperature in the lower level troposphere was favourable for the development of baroclinic instability potential energy and played a role in the enhancement of the precipitation.( 3) The main reasons of long time maintenance of the typhoon intensity was due to the extra regional energy supplement. The southwest wind jet was the main way to supplement typhoon energy by apparent heat energy and latent heat energy. The increment of latent heat energy was much larger than that of apparent heat energy.( 4) The long time maintenance of typhoon intensity strengthened the southwest low level jet. At the same time,the apparent energy advection and latent heat advection in the lower level troposphere were also strengthened in the rainstorm area. The kinetic energy in the lower troposphere in storm regions was enhanced by the incoming kinetic energy from the west boundary of the storm regions,by the downward transport of the kinetic energy and by the conversion of the baroclinic potential energy into the kinetic one. The low level kinetic energy enhancement,energy accumulation and cold area establishment in the rainstorm area provided energy,dynamic conditions and unstable conditions for the occurrence of remote typhoon rainstorm.( 5) There was a precursory signal about occurrence of remote typhoon rainstorm,the positive energy advection generation in the lower troposphere in the rainstorm area was about 12 hours ahead of the rainstorm.
引文
[1]刘瑞文,李萍,杨志强,等.漳州气象应用手册[M].北京:气象出版社,2002:5.
[2]陈联寿.热带气旋研究和业务预报技术的发展[J].应用气象学报,2006,17(6):673-681.
[3]陈联寿.登陆热带气旋暴雨的研究和预报[C]//第十四届全国热带气旋科学讨论会论文摘要集.上海:中国气象学会,2007:3-7.
[4]丛春华,雷小途,陈佩燕.山东两次台风远距离暴雨对比分析[J].中国海洋大学学报,2016,46(12):21-31.
[5]李英,陈联寿,王继志.登陆热带气旋长久维持与迅速消亡的大尺度环流特征[J].气象学报,2004,62(2):167-179.
[6]丛春华,陈联寿,雷小途,等.台风远距离暴雨的研究进展[J].热带气象学报,2011,27(2):264-270.
[7]陈有利,钱燕珍,潘灵杰,等.一次与台风相关联的浙江东北部暴雨成因及预报难点分析[J].干旱气象,2018,36(2):272-281.
[8]赵娴婷,赵玉春,崔春光,等.强台风“尤特”登陆前后移动路径和强度变化特征分析[J].暴雨灾害,2015,34(3):198-205.
[9]张苏平,李春,白燕,等.一次北方台风暴雨(9406)能量特征分析[J].大气科学,2006,30(4):646-659.
[10]杨引明,朱雪松,陶祖钰.上海特大暴雨热带低压结构的数值模拟及其加强机制的分析[J].高原气象,2011,30(2):416-427.
[11]刘爱鸣,刘铭,林毅.低空急流对0212号台风“北冕”后部暴雨影响的分析和数值试验[J].台湾海峡,2004,23(1):2-7.
[12]杨德南,吴建成,洪晓湘,等.南海台风登陆粤东—闽南引发漳州大暴雨的特征和概念模型[J].应用海洋学学报,2017,36(2):260-269.
[13]狄潇泓,许东蓓,肖玮,等.“5. 10”岷县短时暴雨斜压锋生特征和不稳定条件分析[J].干旱气象,2017,35(1):108-115.
[14]张芳华,陈涛,杨舒楠,等.—次冬季暴雨过程中的锋生和条件对称不稳定分析气象[J].气象,2014,40(9):1048-1057.
[15]王文波,王旭,杨明,等.台风“达维”移动路径成因分析[J].干旱气象,2014,32(1):75-80.
[16]张雅斌,武麦凤,侯建忠,等.陕西4次台风远距离暴雨过程的水汽条件对比[J].干旱气象,2014,32(5):788-797.
[17]王力维,陆汉城,钟科.非热成风平衡基流的对称不稳定及在涡旋大气中的动力诊断[J].解放军理工大学学报,2000,12(6):86-91.
[18]励申申,寿绍文,王信.登陆台风与其外围暴雨的相互作用[J].气象学报,1992,50(1):36-40.
[19]寿绍文,励申申,王信.登陆台风动能平衡和转换的诊断[J].南京气象学院学报,1994,17(1):28-31.
[2]陈联寿.热带气旋研究和业务预报技术的发展[J].应用气象学报,2006,17(6):673-681.
[3]陈联寿.登陆热带气旋暴雨的研究和预报[C]//第十四届全国热带气旋科学讨论会论文摘要集.上海:中国气象学会,2007:3-7.
[4]丛春华,雷小途,陈佩燕.山东两次台风远距离暴雨对比分析[J].中国海洋大学学报,2016,46(12):21-31.
[5]李英,陈联寿,王继志.登陆热带气旋长久维持与迅速消亡的大尺度环流特征[J].气象学报,2004,62(2):167-179.
[6]丛春华,陈联寿,雷小途,等.台风远距离暴雨的研究进展[J].热带气象学报,2011,27(2):264-270.
[7]陈有利,钱燕珍,潘灵杰,等.一次与台风相关联的浙江东北部暴雨成因及预报难点分析[J].干旱气象,2018,36(2):272-281.
[8]赵娴婷,赵玉春,崔春光,等.强台风“尤特”登陆前后移动路径和强度变化特征分析[J].暴雨灾害,2015,34(3):198-205.
[9]张苏平,李春,白燕,等.一次北方台风暴雨(9406)能量特征分析[J].大气科学,2006,30(4):646-659.
[10]杨引明,朱雪松,陶祖钰.上海特大暴雨热带低压结构的数值模拟及其加强机制的分析[J].高原气象,2011,30(2):416-427.
[11]刘爱鸣,刘铭,林毅.低空急流对0212号台风“北冕”后部暴雨影响的分析和数值试验[J].台湾海峡,2004,23(1):2-7.
[12]杨德南,吴建成,洪晓湘,等.南海台风登陆粤东—闽南引发漳州大暴雨的特征和概念模型[J].应用海洋学学报,2017,36(2):260-269.
[13]狄潇泓,许东蓓,肖玮,等.“5. 10”岷县短时暴雨斜压锋生特征和不稳定条件分析[J].干旱气象,2017,35(1):108-115.
[14]张芳华,陈涛,杨舒楠,等.—次冬季暴雨过程中的锋生和条件对称不稳定分析气象[J].气象,2014,40(9):1048-1057.
[15]王文波,王旭,杨明,等.台风“达维”移动路径成因分析[J].干旱气象,2014,32(1):75-80.
[16]张雅斌,武麦凤,侯建忠,等.陕西4次台风远距离暴雨过程的水汽条件对比[J].干旱气象,2014,32(5):788-797.
[17]王力维,陆汉城,钟科.非热成风平衡基流的对称不稳定及在涡旋大气中的动力诊断[J].解放军理工大学学报,2000,12(6):86-91.
[18]励申申,寿绍文,王信.登陆台风与其外围暴雨的相互作用[J].气象学报,1992,50(1):36-40.
[19]寿绍文,励申申,王信.登陆台风动能平衡和转换的诊断[J].南京气象学院学报,1994,17(1):28-31.