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1.
Based on observed rainfall data, this study makes a composite analysis of rainfall asymmetry in tropical cyclones(TCs) after making landfall in Guangdong province(GD) during 1998—2015. There are 3.0 TCs per year on average making landfall in GD and west of GD(WGD) has the most landfall TCs. Most of TCs make landfall in June,July, August, and September at the intensities of TY, STS, and TS. On average, there is more rainfall in the southwest quadrant of TC in CGD(center of GD), WGD, and GD as a whole, and the maximum rainfall is located in the southwest near the TC center. The mean TC rainfall in the east of GD(EGD) leans to the eastern side of TC. The TC rainfall distributions in June, July, August, and September all lean to the southwest quadrant and the maximum rainfall is located in the southwest near the TC center. The same features are found in the mean rainfall of TD, TS, STS, TY,and STY. The maximum rainfall is mainly in the downshear of vertical wind shear. Vertical wind shear is probably the dominate factor that determines asymmetric rainfall distribution of TCs in GD. Storm motion has little connection with TC rainfall asymmetry in GD. 相似文献
2.
登陆台湾岛热带气旋强度和结构变化的统计分析 总被引：2，自引：0，他引：2
利用1949—2008年共60年的《台风年鉴》、《热带气旋年鉴》资料及CMA-STI热带气旋最佳路径数据集,2001—2008年美国联合台风警报中心(JTWC)热带气旋尺度相关资料及日本气象厅(JMA)的TBB资料,统计分析西北太平洋(包括南海)热带气旋(TC)在登陆台湾过程中强度和结构变化的基本特征,主要结论有:(1)TC登陆台湾时强度为台风及以上级别的样本数占总样本数约60%,主要出现在6—9月,东部登陆TC的强度一般比在西部登陆的强;(2)大部分TC在岛上维持6 h左右,登陆时最大风速≤5级和强度为超强台风的TC穿越台湾岛时移动比较缓慢;(3)126个登陆台湾的TC样本过岛后近中心海平面气压平均增加5.61 hPa,近中心最大风速平均减小3.58 m/s,在台湾东部地区登陆TC的衰减率比在西部登陆的大3倍左右;(4)TC在登陆台湾前6 h至离岛后6 h期间其8级和10级风圈半径均明显减小,TC形状略呈长轴为NE-SW向的椭圆状,而其最大风速的半径却逐渐增大;(5)TBB分析结果显示,TC登陆台湾前,其外围对流主要出现在南侧和西侧,结构不对称,登陆以后,TC北部及东部的对流显著发展,外围结构区域对称;但中心附近的强对流则从登陆前6 h开始逐渐减弱消失。表明TC穿越台湾过程中内核结构松散、强度减弱。 相似文献
3.
Tropical cyclone potential hazard in Southeast China and its linkage with the East Asian westerly jet 总被引：1，自引：0，他引：1
A new synthesized index for estimating the hazard of both accumulated strong winds and heavy rainfall from a tropical cyclone (TC) is presented and applied to represent TC potential hazard over Southeast China. Its relationship with the East Asian westerly jet in the upper troposphere is also investigated. The results show that the new TC potential hazard index (PHI) is good at reflecting individual TC hazard and has significantly higher correlation with economic losses. Seasonal variation of TC-PHI shows that the largest TC-PHI on average occurs in July-August, the months when most TCs make landfall over mainland China. The spatial distribution of PHI at site shows that high PHI associated with major landfall TCs occurs along the southeast coast of China. An East Asian westerly jet index (EAWJI), which represents the meridional migration of the westerly jet, is defined based on two regions where significant correlations exist between TC landfall frequency and zonal wind at 200 hPa. Further analyses show that an anomalous easterly steering flow occurred above the tracks of TCs, and favored TCs making landfall along the southeast coast of China, leading to an increase in the landfall TC when the EAWJ was located north of its average latitude. Meanwhile, anomalous easterly wind shear and positive anomaly in low-level relative vorticity along TCs landfall-track favored TC development. In addition, anomalous water vapor transport from westerly wind in the South China Sea resulted in more condensational heating and an enhanced monsoon trough, leading to the maintenance of TC intensity for a longer time. All of these environmental factors increase the TC potential hazard in Southeast China. Furthermore, the EAWJ may affect tropical circulation by exciting meridional propagation of transient eddies. During a low EAWJI phase in July-August, anomalous transient eddy vorticity flux at 200 hPa propagates southward over the exit region of the EAWJ, resulting in eddy vorticity flux convergence and the weakening in the zonal westerly flow to the south of the EAWJ exit region, producing a favorable upper-level circulation for a TC making landfall. 相似文献
4.
利用CMORPH降水资料，将热带气旋（TC）登陆后的降水分为路径左侧降水（L型）和右侧降水（R型）两类，并针对登陆华东地区TC的 L型和R型降水的大气环流场、环境水平风垂直切变以及台风环流内的动热力条件进行对比分析，结果表明:2005～2014年间登陆华东地区的20例TC中包括12例L型和8例R型。总体来看，大气环流因子对于登陆华东TC降水分布起主要作用。L型降水TC高层南亚高压主要呈纬向带状分布，在登陆过程中路径左侧维持偏东风高空辐散气流，中层西风槽偏东，西太平洋副热带高压（简称副高）偏南，环境水平风垂直切变指向西南。R型降水TC高层南亚高压断裂，呈经向分布。TC路径左侧风场较均匀，右侧东南风高空辐散气流明显。副高的位置偏北呈块状，同时环境水平风垂直切变指向东北，有利于路径右侧降水。台风环流内，低层冷暖平流输送以及水汽辐合与降水落区也有较好对应关系。L型TC低层暖平流的输送使TC西南象限低层增暖，大气稳定度降低。同时水汽辐合区也主要位于西南象限，有利于TC路径左侧降水。而R型TC副高位置偏北可将南侧的东南暖湿气流向台风环流更西部输送，东北象限维持暖平流，有利于路径右侧降水发生。 相似文献
5.
The present study identifies a significant influence of the sea surface temperature gradient(SSTG) between the tropical Indian Ocean(TIO; 15°S-15°N, 40°-90°E) and the western Pacific warm pool(WWP; 0°-15°N, 125°-155°E) in boreal spring on tropical cyclone(TC) landfall frequency in mainland China in boreal summer. During the period 1979-2015, a positive spring SSTG induces a zonal inter-basin circulation anomaly with lower-level convergence, mid-tropospheric ascendance and upper-level divergence over the west-central TIO, and the opposite situation over the WWP, which produces lower-level anomalous easterlies and upper-level anomalous westerlies between the TIO and WWP. This zonal circulation anomaly further warms the west-central TIO by driving warm water westward and cools the WWP by inducing local upwelling, which facilitates the persistence of the anomaly until the summer. Consequently, lower-level negative vorticity, strong vertical wind shear and lower-level anticyclonic anomalies prevail over most of the western North Pacific(WNP), which decreases the TC genesis frequency. Meanwhile, there is an anomalous mid-tropospheric anticyclone over the main WNP TC genesis region,meaning a westerly anomaly dominates over coastal regions of mainland China, which is unfavorable for steering TCs to make landfall in mainland China during summer. This implies that the spring SSTG may act as a potential indicator for TC landfall frequency in mainland China. 相似文献
6.
利用逐小时风速观测资料以及台风年鉴资料,分析了2008~2014年登陆我国大陆地区的51次热带气旋（TC）的地面风场分布特征,包括TC登陆期间大陆地面风场演变和大风分布特征、海岛站和内陆站的风速差异以及海拔对风力造成的影响等。结果表明:6级及以上大风主要发生在距离TC中心300 km内、TC强度达到台风（TY）以上时,并主要位于TC移动方向的右侧,尤其是右前象限;华南区TC风场分布主要由在此区域登陆的TC（Ⅰ类）造成,较大风速区包括广东西南部沿海、雷州半岛附近和海南西部沿岸;华东区TC风场分布主要由在此区域登陆的TC（Ⅱ类）造成,杭州湾出海口以及浙闽沿海是较大风速区;6级及以上大风广泛分布在华南和华东沿海,6~7级地面大风高频站主要位于杭州湾附近,8级及以上地面大风高频站点在杭州湾和福建沿海分布比广东西南部更为密集;TC登陆前后均可能造成大风,大风出现时间与站点至TC中心的距离密切相关;同等强度TC在海岛站造成的风速比陆地站更大,对高海拔站点造成的风力大于低海拔站点。本文研究结论对于TC大陆地面风场的预报具有一定参考价值。 相似文献
7.
利用白山多普勒天气雷达、常规观测和地面加密观测资料,对2012年7月2日发生在吉林省南部的一次左移超级单体风暴进行了研究。结果发现,此次天气过程发生在深厚东北冷涡的东南象限、超强高空急流核附近的北侧,且低空风垂直切变不强、对流有效位能不大;低空有较强的暖平流,并存在一个西南—东北走向的风切变区;低空辐合、高空辐散、位于露点锋附近以及高空急流核的存在为有利于的对流发展的重要因素。在风暴发生发展过程中,始终有一个中-β尺度反气旋环流(尺度为120 km)相伴随,其旋转半径由高到低逐渐增加并在东南偏南方向被拉伸为椭圆型结构,风暴发生在该环流的西北象限的西南偏南气流之中,并具有钩状回波、弱回波区、反中气旋等超级单体所具有的特征。反中气旋出现在对流风暴发展的旺盛期,旋转半径从低层到高层逐渐增加。在风暴经过地区出现了冰雹、强降温、瞬时大风等天气现象和气象灾害。 相似文献
8.
采用动态合成分析方法,对1970-2006年登陆后北上类TC（tropicalcyclone）和西行类TC各7个样本做动态合成分析和诊断,结果表明：（1）北上类TC在背景场长波槽前北移靠近中纬度斜压锋区,通过吸附运动使TC低压并入西风槽,而西行类TC背景场没有长波槽,离中纬度斜压锋区较远;（2）北上类TC登陆时存在西南低空急流水汽输送带,当其强度减弱后,TC东南侧存在东南暖湿气流作为补充,而西行类TC减弱后逐渐与之分离,且不存在东南暖湿气流作为补充;（3）北上类TC高层辐散区与高空急流边界靠近,因此增强了其向东北方向的辐散,低层由于高层动量下传,加强了低空西风,从而使TC低压环流维持,而西行类TC离高空急流边界较远;（4）北上类TC从中纬度斜压锋区获取斜压能量,其环流垂直切变增强,相对涡度差负值增大,在高空TC中心散度由大变小后又由小变大的过程中,TC发生了变性,而西行类TC没有环境能量补给,逐渐填塞消亡。因此,当一个TC登陆后,其预报移动方向、水汽输送状况、与斜压锋区的关系以及高空辐散气流等特征,可以作为初步判定登陆TC将减弱消亡还是将变性加强的可能原因。 相似文献
9.
In order to provide an operational reference for tropical cyclone precipitation forecast,this study investigates the spatial distributions of precipitation associated with landfalling tropical cyclones(TCs) affecting China using Geostationary Meteorological Satellite 5(GMS5)-TBB dataset.All named TCs formed over the western North Pacific that made direct landfall over China during the period 2001-2009 are included in this study.Based on the GMS5-TBB data,this paper reveals that in general there are four types of distribution of precipitation related to landfalling TCs affecting China.(a) the South-West Type in which there is a precipitation maximum to the southwestern quadrant of TC;(b) the Symmetrical South Type in which the rainfall is more pronounced to the south side of TC in the inner core while there is a symmetrical rainfall distribution in the outer band region;(c) the South Type,in which the rainfall maxima is more pronounced to the south of TC;and(d) the North Type,in which the rainfall maxima is more pronounced to the north of TC.Analyses of the relationship between precipitation distributions and intensity of landfalling TCs show that for intensifying TCs,both the maximum and the coverage area of the precipitation in TCs increase with the increase of TC intensity over northern Jiangsu province and southern Taiwan Strait,while decreasing over Beibu Gulf and the sea area of Changjiang River estuary.For all TCs,the center of the torrential rain in TC shifts toward the TC center as the intensity of TC increases.This finding is consistent with many previous studies.The possible influences of storm motion and vertical wind shear on the observed precipitation asymmetries are also examined.Results show that the environmental vertical wind shear is an important factor contributing to the large downshear rainfall asymmetry,especially when a TC makes landfall on the south and east China coasts.These results are also consistent with previous observational and numerical studies. 相似文献
10.
COMPARATIVE ANALYSIS OF THE INTENSIFYING AND WEAKENING LANDFALL TROPICAL CYCLONES DURING EXTRATROPICAL TRANSITION OVER CHINA 总被引：1，自引：1，他引：0
Based on the Tropical Cyclone(TC) Yearbooks data and JRA-25 reanalysis data from the Japan Meteorological Agency(JMA) during 1979-2008, dynamic composite analysis and computation of kinetic energy budget are used to study the intensifying and weakening TCs during Extratropical Transition over China. The TCI shows strong upper-level divergence, strengthened low-level convergence and significantly enhanced upward motion under the influence of strong upper-level troughs and high-level jets. The TCI is correspondingly intensified after Extratropical Transition(ET); TCW exhibits strong upper-level divergence, subdued low-level convergence and slightly enhanced upward motion under the influence of weak upper-level troughs and high-level jets. It then weakens after ET. The increase(decrease) of the generation of kinetic energy by divergence wind in TCI(TCW) at low level is one of the major reasons for TCI’s intensification(TCW’s weakening) after transformation. The generation of kinetic energy by divergence wind is closely related to the development of a low-level baroclinic frontal zone. The growth of the generation of kinetic energy by rotational wind in TCI at upper level is favorable for TCI’s maintenance, which is affected by strong upper-level troughs. The dissipation of the generation of kinetic energy by rotational wind in TCW at upper level is unfavorable for TCW’s maintenance, which is affected by weak upper-level troughs. 相似文献
11.
Combined with TRMM products and Tropical Cyclone (TC) best track data in Northwest Pacific from 1 January 2003 to 31 December 2009, a total of 118 TCs, including 336 instantaneous TC precipitation observations are established as the TRMM TC database, and the database is stratified into four intensity classes according to the standard of TC intensity adopted by China Meteorological Administration (CMA): Severe Tropical Storm (STS), Typhoon (TY), Severe Typhoon (STY) and Super Typhoon (SuperTY). For each TC snapshot, the mean rainfall distribution is computed using 10-km annuli from the TC center to a 300-km radius, then the axisymmetric component of TC rainfall is represented by the radial distribution of the azimuthal mean rain rate; the mean rain rates, rain types occurrence and contribution proportion are computed for each TC intensity class; and the mean quadrantal distribution of rain rates along TCs motion is analyzed. The result shows that: (1) TCs mean rain rates increase with their intensity classes, and their radial distributions show single-peak characteristic gradually, and furthermore, the characteristics of rain rates occurrence and contribution proportion change from dual-peak to single-peak distribution, with the peak rain rate at about 5.0 mm/h; (2) Stratiform rain dominate the rain type in the analysis zone, while convective rain mainly occurred in the eye-wall region; (3) The values of mean rain rate in each quadrant along TCs motion are close to each other, relatively, the value in the right-rear quadrant is the smallest one. 相似文献
12.
We use FLIGHT+ aircraft reconnaissance data for tropical cyclones (TCs) in the North Atlantic and Eastern Pacific from 1997 to 2015 to re-examine TC fullness (TCF) characteristics at the flight level. The results show a strong positive correlation between the flight-level TCF and the intensity of TCs, with the flight-level TCF increasing much more rapidly than the near-surface TCF with increasing intensity of the TCs. The tangential wind in small-TCF hurricanes is statistically significantly stronger near the eye center than that in large-TCF hurricanes. Large-TCF hurricanes have a ring-like vorticity structure. No significant correlation is observed between the flight-level TCF and the comparative extent of the vorticity-skirt region occupied in the outer core skirt. The proportion of the rapid filamentation zone in the outer core skirt increases with increasing flight-level TCF. The differences in entropy between the radius of the maximum wind and the outer boundary of the outer core skirt also increase with increasing flight-level TCF. 相似文献
13.
Climatologically, August is the month with the most tropical cyclone(TC) formation over the western North Pacific(WNP) during the typhoon season. In this study, the reason for abnormal TC activity during August is discussed—especially August 2014, when no TCs formed. The large-scale background of August 2014 is presented, with low-level large-scale easterly anomalies and anticyclonic anomalies dominating over the main TC genesis region, a weak monsoon trough system,and a strong WNP subtropical high(WPSH), leading to significantly reduced low-level convergence, upper-level divergence,and mid-level upward motion. These unfavorable large-scale conditions suppressed convection and cyclogenesis. In August2014, equatorial waves were inactive within the negative phase of the Madden–Julian Oscillation(MJO), with fewer tropical disturbances. Although the low-level vorticity and convection of those disturbances were partly promoted by the convective envelopes of equatorial waves, the integral evolution of disturbances, as well as the equatorial waves, were suppressed when propagating into the negative MJO phase. Moreover, the upper-level potential vorticity(PV) streamers associated with anticyclonic Rossby wave breaking events imported extratropical cold and dry air into the tropics. The peripheral tropospheric dryness and enhanced vertical wind shear by PV streamer intrusion combined with the negative MJO phase were responsible for the absence of TC formation over the WNP in August 2014. 相似文献
14.
为进一步完善热带气旋大风风圈的分析和预报业务,利用中央气象台（NMC）发布的热带气旋报文资料、ERA5再分析资料,研究了2015年6月30日至2020年12月31日热带气旋最大强度时的7、10和12级风圈的非对称性特征及成因。统计结果表明: 热带气旋的7级风圈半径非对称性最大,10级次之,12级最小;非对称分布热带气旋的7、10和12级风圈最大半径大多分布在东北、东南和西北象限;同一热带气旋的7级和10级风圈最大半径大多分布在相同的象限。将7级风圈单一象限分布的热带气旋与多象限分布的热带气旋各按象限分布分成4类,分析4类7级风圈单一象限分布的热带气旋生成季节、地面10 m风特征及风圈非对称分布的成因发现:各类热带气旋具有明显的季节特征;地面10 m风场呈不对称分布;风圈非对称分布与西太平洋副热带高压、西南气流及地面冷高压等天气系统与热带气旋的相互作用造成的各象限位势高度梯度非对称分布密切相关。 相似文献
15.
台风Matsa(2005)和Wipha(2007)变性过程对比分析 总被引：2，自引：0，他引：2
利用日本气象厅热带气旋年鉴资料和JRA-25再分析资料,对0509号台风Matsa和0712号台风Wipha变性过程进行了对比分析。结果表明,台风Matsa和Wipha均是在我国登陆后转向东北方向运动过程中发生变性,但Matsa嵌入中纬度高空锋区,变性为温带气旋后有再加强过程,而Wipha仅外围环流与锋区接触,变性为温带气旋后无再加强过程。通过等熵面位涡分析进一步表明,Matsa变性加强表现为高层正位涡与低层暖平流的耦合,以及高层正位涡下传至中低层;Wipha的变性过程中,高层正位涡并未与低层暖平流耦合,高层正位涡无明显的下传。 相似文献
16.
A CLIMATOLOGY OF EXTRATROPICAL TRANSITION OF TROPICAL CYCLONES IN THE WESTERN NORTH PACIFIC 总被引：1，自引：1，他引：0
Based on best-track data and JRA-25 reanalysis, a climatology of western North Pacific extratropical
transition (ET) of tropical cyclone (TC) is presented in this paper. It was found that 35% (318 out of 912) of all
TCs underwent ET during 1979–2008. The warm-season (June through September) ETs account for 64% of all ET events
with the most occurrence in September. The area 120°E–150°E and 20°N–40°N is the most favorable region for ET
onsets in western North Pacific. The TCs experience ET at latitudes 30°N–40°N and have the greatest intensity in
contrast to other latitude bands. The distribution of ET onset locations shows obviously meridional migration in
different seasons. A cyclone phase space (CPS) method was used to analyze the TC evolution during ET. Except for
some cases of abnormal ET at relatively high latitudes, typical phase evolution paths—along which TC firstly
showed thermal asymmetry and an upper-level cold core and then lost its low-level warm core—can be used to
describe the main features of ET processes in western North Pacific. Some seasonal variations of ET evolution paths
in CPS were also found at low latitudes south of 15°N, which suggests different ET onset mechanisms there. Further
composite analysis concluded that warm-season ETs have generally two types of evolutions, but only one type in cold
season (October through next May). The first type of warm-season ETs has less baroclinicity due to long distance
between the TC and upper-level mid-latitude system. However, significant interactions between a mid-latitude upper
-level trough and TC, of either approaching or being absorbed into the trough, and TC’s relations with downstream
and upstream upper-level jets, are the fingerprints for both a second type of warm-season ETs and almost all the
cold-season ETs. For each type of ETs, detailed structural characteristics as well as precipitation distribution
are illustrated by latitude. 相似文献
17.
To investigate the impacts of solar radiation on tropical cyclone (TC) warm-core structure (i.e., the magnitude and height), a pair of idealized simulations are conducted by specifying different strengths of solar shortwave radiation. It is found that the TC warm core is highly sensitive to the shortwave radiative effect. For the nighttime storm, a tendency for a more intense warm core is found, with an elevated height compared to its daytime counterpart. As pointed out by previous studies, the radiative cooling during nighttime destabilizes the local and large-scale environment and thus promotes deep moist convection, which enhances the TC's intensity. Due to the different inertial stabilities, the diabatic heating in the eyewall will force different secondary circulations. For a strong TC with a deeper vertical structure, this promotes a thin upper-level inflow layer. This inflow carries the lower stratospheric air with high potential temperature and descends adiabatically in the eye, resulting in significant upper-level warming. The Sawyer-Eliassen diagnosis further confirms that the height of the maximum temperature anomaly is likely attributable to the balance among the forced secondary circulations. 相似文献
18.
基于风廓线雷达的广东登陆台风边界层高度特征研究 总被引：3，自引：1，他引：2
针对8个登陆广东省的热带气旋,利用经过数据质量控制的风廓线雷达连续、高时空分辨率的风场观测数据,对热带气旋边界层特征进行了分析。研究结果表明:热带气旋边界层中切向风速大值区垂直范围越大、风速越强、持续时间越久,则热带气旋强度越大、登陆后强度维持时间越久。眼区外入流层厚度越大,入流层气流越强,热带气旋登陆后强度维持时间则越久。风廓线雷达信噪比垂直梯度对大气湍流信息有一定的指示作用,对于入流层高度在2000 m以下的热带气旋,其入流层顶所在高度与信噪比梯度最大值所在高度相近,对于入流层较为深厚的热带气旋,用信噪比垂直梯度确定的边界层高度虽接近入流层顶高,但仍有一定差距。不同特点的热带气旋其边界层高度并不相同,对于登陆后强度迅速减弱的热带气旋边界层高度在500~1000 m;登陆后强度持续时间短的热带气旋,其边界层高度约1000~2000 m;登陆后强度持续时间长的热带气旋,其边界层高度在2000 m之上,最高可达5000~7000 m。这些结果加深了对登陆台风边界层高度演变特征的认识。 相似文献
19.
登陆台风降水的大尺度环流诊断分析 总被引：4，自引：0，他引：4
强度相似的登陆台风造成的强降水可能差异很大.为研究大尺度环流对登陆台风降水的影响,利用热带气旋年鉴和NCEP/NCAR再分析资料,运用动态合成分析方法,对比分析了登陆后48小时内降水特征迥异而强度、路径相似的两组登陆台风的大尺度环流特征.合成分析结果表明,西南气流的水汽输送对台风降水至关重要,造成大范围强降水的台风往往在登陆后仍与深厚西南急流相连并持续很长时间.高空强辐散场是登陆台风造成大范围强降水的一个基本动力特征.造成强降水的登陆台风其环境场的上升气流不仅强,其气旋性环流的伸展高度高且能长时间维持.登陆台风造成降水的范围和强度与登陆前台风下游大陆环境大气的稳定度有关.下游高温高湿的大气有利于能量尤其是潜热能的大量补充,对强降水增强和维持都十分有利.因此,大尺度环流对登陆台风降水有明显影响.其中,与台风相连的西南急流强度和深厚程度是最重要的因子,高低空辐散辐合强度、台风及环境风场结构以及台风下游大陆上空大气湿热状态等都是需要加以考虑的. 相似文献
20.
The influence of thermal states in the warm pool on tropical cyclones (TCs) in the western North Pacific (WNP) is investigated. There are fewer typhoons during warm years of the warm pool in which tropical storms tend to form in the northwest quadrant and move westward. Inversely, typhoons tend to recurve northeastward to the southeast of Japan and increase in number in the southeast quadrant during cold years. Based on composite analyses, circulation-induced dynamic factors rather than thermal factors are identified as being responsible for TCs activities. During the warm state, the monsoon trough retreats westwards, which leads to anomalous vorticity in low-level and divergence in high-level in the western part of west Pacific. Above-normal TCs activity is found in this area. Furthermore, wind anomalies at 500 hPa determine the main track types. On the contrary, when the warm pool is in cold state, the atmospheric circulation is responsible for the formation of more TCs in the southeast quadrant and recurving track. 相似文献