近年來最強七月空汙 - 台中
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By Elma
at 2018-07-23T11:59
at 2018-07-23T11:59
Table of Contents
不多說直接上圖
https://i.imgur.com/83AXBK0.jpg
說明:因為最近比較忙時間不多,只拿忠明測站當作基準,大家有興趣可以自行查詢~
至於為何說這是近年來最嚴重的七月空汙呢?
其實去年7/28台中也有類似的空汙事件,但只持續了一天就結束,前幾年也差不多,至於
上一次有這樣連續好幾天的嚴重空汙,可要追溯到2009年了,如下圖
https://i.imgur.com/h09ZsLC.jpg
說明:此數據已經用回歸式還原為pm2.5原始值,以免出現校準美化數據嫌疑之爭議
因為氣象局網站只能撈到2010至今的台中氣象站資料,所以我已經無從知曉2009當時台中
的風向風速,也無法直接跟上週天氣做比對,這篇文只能大概分析為什麼台中夏天也能出
現如此嚴重的空汙
首先從7/13開始,台中風力減弱,夜晚降溫,海陸溫度差異不大風力趨近於零,而白天陸
地升溫則變成海風吹進陸地
https://i.imgur.com/arKxeeN.jpg
而這種天氣持續多天,在7/17達到最高峰
https://i.imgur.com/CXsEHlu.jpg
最後7/18開始風力漸漸增強,空汙趨緩
https://i.imgur.com/uWds2kh.jpg
也就是說,夏季連續多天將近一週的東風風場讓台中位於背風尾流區(原因有待氣象專家
解釋),經過多日污染累積,最後引爆嚴重達紫爆的空汙
--
https://i.imgur.com/83AXBK0.jpg

說明:因為最近比較忙時間不多,只拿忠明測站當作基準,大家有興趣可以自行查詢~
至於為何說這是近年來最嚴重的七月空汙呢?
其實去年7/28台中也有類似的空汙事件,但只持續了一天就結束,前幾年也差不多,至於
上一次有這樣連續好幾天的嚴重空汙,可要追溯到2009年了,如下圖
https://i.imgur.com/h09ZsLC.jpg

說明:此數據已經用回歸式還原為pm2.5原始值,以免出現校準美化數據嫌疑之爭議
因為氣象局網站只能撈到2010至今的台中氣象站資料,所以我已經無從知曉2009當時台中
的風向風速,也無法直接跟上週天氣做比對,這篇文只能大概分析為什麼台中夏天也能出
現如此嚴重的空汙
首先從7/13開始,台中風力減弱,夜晚降溫,海陸溫度差異不大風力趨近於零,而白天陸
地升溫則變成海風吹進陸地
https://i.imgur.com/arKxeeN.jpg

而這種天氣持續多天,在7/17達到最高峰
https://i.imgur.com/CXsEHlu.jpg

最後7/18開始風力漸漸增強,空汙趨緩
https://i.imgur.com/uWds2kh.jpg

也就是說,夏季連續多天將近一週的東風風場讓台中位於背風尾流區(原因有待氣象專家
解釋),經過多日污染累積,最後引爆嚴重達紫爆的空汙
--
Tags:
台中
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