Tropical cyclones (TCs) can transport birds and insects near their center of circulation. In this study, we examined the maximum altitude, area and density of the radar-derived bioscatter signature across a set of 42 TC centers of circulation sampled from 2011 to 2020. All TC events contained at least one time when a bioscatter signature was present. More intense hurricanes with closed eyes typically had taller and denser bioscatter signatures, and sometimes larger areas dominated by bioscatter. This indicated a larger number of organisms within the circulation of more intense hurricanes, supporting the speculation that those storms were most likely to trap birds that do not want to risk flying through their eyewall thunderstorms. Larger and denser bioscatter signatures, indicating a larger number of birds, tend to occur when fall migration brings a large bird population to the Gulf and East Coasts where most storms were sampled. TC formation location was not related to bioscatter characteristics, but storms sampled in the Gulf of Mexico and Florida tended to have larger and denser bioscatter signatures.

中文翻译：

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热带气旋的生物散射运输：大西洋盆地 10 年的见解

热带气旋 (TC) 可以将鸟类和昆虫运送到其循环中心附近。在这项研究中，我们检查了从 2011 年到 2020 年采样的一组 42 个 TC 循环中心的雷达衍生生物散射特征的最大高度、面积和密度。所有 TC 事件都包含至少一次存在生物散射特征的时间。闭眼的更强烈飓风通常具有更高和更密集的生物散射特征，有时生物散射占主导地位的区域更大。这表明在更强烈的飓风循环中存在更多的生物，支持这样的猜测，即这些风暴最有可能困住那些不想冒险飞过眼墙雷暴的鸟类。更大和更密集的生物散射特征，表明更多的鸟类，当秋季迁徙将大量鸟类带到大多数风暴采样的墨西哥湾和东海岸时，往往会发生这种情况。TC 形成位置与生物散射特征无关，但在墨西哥湾和佛罗里达采样的风暴往往具有更大和更密集的生物散射特征。