局屬與自動氣象站:氣象局回覆 - 颱風討論
By Hedy
at 2014-01-28T12:27
at 2014-01-28T12:27
Table of Contents
近來有版友討論為何自動氣象站的氣溫資料似乎未納入正式記錄,
以致於平地最低溫總是出現在嘉義、淡水、新竹等幾處特定地點
以下是氣象局對於此一問題的回覆:
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親愛的網友:您好!
本局所屬有人氣象站除現場有專責觀測人員之外,並設有最高、最低氣溫的觀測
儀器及每分鐘氣溫資料的連續紀錄,因此每日最高及最低氣溫為氣象站當日實際
已發生的最高及最低溫紀錄。自動氣象站的資料更新頻度則和有人氣象站不同,
無人自動站多數位於通訊不便的地區,資料傳輸不易,其觀測資料為每隔一段時
間(例如每小時或每10分鐘)才經無線電自中繼站回傳,而當日最高或最低氣溫
發生的時間不一定剛好是無人氣象站傳送資料的觀測時間,也就是自動氣象站並
無真正的最高最低溫紀錄。因此日最高溫及日最低溫的排行榜,未納入無人自動
氣象站的溫度資料。
至於雨量資料,是以紀錄累積量為主,即使不是每分鐘的連續紀錄,每小時累積
雨量或日累積雨量仍可做為防災參考。所以雨量排行中有包括自動雨量站的雨量
資料。
以上說明供您參考,謝謝您的來信。敬祝 萬事如意
中央氣象局 敬復
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所以即使不考慮人工校驗的因素,局屬站與自動站的資料仍無法相提並論
關鍵在於資料觀測的頻率,與「溫度」這項天氣要素的資料性質
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颱風
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