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冷门知识 | 丰富你的知识储备

天气预报的温度比实际温度低吗?

15 Oct 2023

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流言:很多人觉得,夏天天气预报的温度比自己实际感受到的温度要低,所以认为是相关部门不敢报高温,这是真的吗?真相:气象部门会严格按照国际统一标准测量,不会故意压低预报温度。首先,根据气象预报考核标准,预报温度和实况温度的差别应在误差标准范围内,否则会被认定为错报。其次,气温的标准由相关国际气象组织规范。气象观测站的选址一般要求建在不受环境影响的位置,周边不能有山、高楼、水体,以便尽量反映当地真实大气环境;测温度用的百叶箱要求离地1.5米高,下垫面为草地,不受地表辐射影响;百叶箱中的温度计也是在避光、通风条件下测温,这样测出来的气温才符合全世界统一标准。这种测量方式,相当于是人在一个阴凉通风的环境下感受到的温度,因此和人在户外阳光下感受到的温度存在差异。

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