TC21

This report describes the results of a nationwide survey on tropical cyclones in the United States. The 2021 Tropical Cyclone Survey (TC21) was designed and administered by the Institute for Public Policy Research and Analysis (IPPRA) at the University of Oklahoma. It was fielded June 22 – July 1, 2021, using an online questionnaire that was completed by 1,550 U.S. adults (age 18+) that were recruited from an Internet panel that matches the characteristics of the U.S. population as estimated in the U.S. Census. The TC20 survey was designed to establish baseline measures of the extent to which U.S. adults receive, understand, and respond to tropical cyclone forecasts and warnings as well as trust in the National Weather Service (NWS), extreme weather and climate risk perceptions, risk literacy, interpretations of probabilistic language, and weather preparedness. The TC21 survey refined these measures and included a few questions about information preferences along the event timeline. This report briefly describes the methodology, survey data collection, data weighting, and a reproduction of the survey instrument with weighted means and frequencies for the questions that elicited numeric responses. The University of Oklahoma provided funding for all data collection. NOAA’s Weather Program Office through the U.S. Weather Research Program provided funding for survey design and data analysis.本报告详述了美国全国热带气旋调查的研究成果。2021年热带气旋调查（TC21）由俄克拉荷马大学公共政策研究与分析研究所（Institute for Public Policy Research and Analysis, IPPRA）设计并执行。本次调查于2021年6月22日至7月1日开展，采用线上问卷形式，共回收1550名18岁及以上美国成年人的有效答卷，受访者招募自匹配美国人口普查所估算的全美人口特征的在线调研面板。此前的TC20调查旨在建立基线指标，用以衡量美国成年人接收、理解并响应热带气旋预报与预警的程度，以及其对美国国家气象局（National Weather Service, NWS）的信任度、极端天气与气候风险感知水平、风险素养、概率语言解读能力以及气象防灾准备情况。TC21调查对上述指标体系进行了优化完善，并增设了若干围绕灾害事件时间线的信息偏好相关问题。本报告简要介绍了调查方法、数据采集流程、数据加权方案，并附上调查问卷的完整复本，以及所有需生成数值型应答的问题的加权均值与频数分布。俄克拉荷马大学为全部数据采集工作提供了经费支持；美国国家海洋和大气管理局（National Oceanic and Atmospheric Administration, NOAA）天气项目办公室通过美国天气研究计划，为调查设计与数据分析提供了资金资助。