In this study was performed a comparative climatology of outer tropical cyclone (TCs) size using radial wind profiles. A wind speed of 2 ms${}^{-1}$ ($\sim$4 kt) was taken as the threshold to define the TC size. The method proposed by Willoughby et al. (2006) (W06) to determine the wind profile showed the least variance and the smallest coefficient of variation of all profiles. W06 correctly described the radial wind structure of storms such as Hurricane Irma (2017) and Cyclone Giri (2010), compared with the European Centre for Medium-Range Weather Forecasts ERA-5 reanalysis data. Thus, W06 was used to develop the climatological TC size (TCSize) database. It was found that the tropical cyclones are largest when the maximum wind speed ranges between 20 and 40 ms${}^{-1}$ and they most frequently reach a size between 700 and 800 km. The TCs exhibit their maximum size when they are in extratropical latitudes, while the smallest are observed in the low latitudes of both hemispheres. The global mean size is 748.7 km with a 95% confidence interval of [748.2,749.2] km. Median storm size is largest in the North Atlantic basin and smallest in the North Indian Ocean. The method proposed here is designed to be an objective metric that can be quickly applied to any TC when its position, maximum wind speed, and minimum central pressure are known. As a result, a TCSize database was created for all ocean basins, which could be useful for many applications, including different risk analyses.

在这项研究中，使用径向风廓线对外热带气旋 (TC) 的大小进行了比较气候学。风速 2 ms${}^{-1}$ ($～$4 kt) 作为定义 TC 大小的阈值。Willoughby 等人提出的方法。(2006) (W06) 确定风廓线显示出所有廓线的最小方差和最小变异系数。与欧洲中期天气预报中心 ERA-5 再分析数据相比，W06 正确描述了飓风艾尔玛 (2017) 和飓风吉里 (2010) 等风暴的径向风结构。因此，W06 被用于开发气候 TC 大小 (TCSize) 数据库。发现当最大风速在20~40 ms之间时，热带气旋最大${}^{-1}$它们最常达到 700 至 800 公里的大小。TC 在温带纬度时表现出最大的尺寸，而在两个半球的低纬度都观察到最小。全球平均大小为 748.7 公里，95% 的置信区间为 [748.2,749.2] 公里。中值风暴规模在北大西洋盆地最大，在北印度洋最小。这里提出的方法被设计为一种客观度量，当其位置、最大风速和最小中心压力已知时，​​可以快速应用于任何 TC。因此，为所有海洋盆地创建了一个 TCSize 数据库，该数据库可用于许多应用程序，包括不同的风险分析。