{"id":561,"date":"2006-01-20T06:00:00","date_gmt":"2006-01-19T22:00:00","guid":{"rendered":"http:\/\/www.weather.org.hk\/blog\/?p=561"},"modified":"2010-11-11T18:27:55","modified_gmt":"2010-11-11T10:27:55","slug":"%e8%a1%9b%e6%98%9f%e9%9b%b2%e5%9c%96%e7%9c%8b%e5%86%b7%e9%8b%92","status":"publish","type":"post","link":"https:\/\/www.weather.org.hk\/news\/%e8%a1%9b%e6%98%9f%e9%9b%b2%e5%9c%96%e7%9c%8b%e5%86%b7%e9%8b%92\/","title":{"rendered":"\u885b\u661f\u96f2\u5716\u770b\u51b7\u92d2"},"content":{"rendered":"

\t\t\t\t\t\t\t\t\t<\/p>\n

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\"Picture\"<\/p>\n

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\"Picture\"<\/p>\n

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<\/code><\/p>\n","protected":false},"excerpt":{"rendered":"

常在天氣報告聽到「冷鋒現正橫過華南沿岸」，很難想像具體情況，不過利用衛星雲圖便可看清楚。 衛星雲圖（satellite image）分為可見光（visible）及紅外線（infra-red）兩種。日間氣象衛星拍攝地球時，由地球反射太陽光而成的影像稱為可見光衛星雲圖，可清楚看見雲的分佈情況。 上圖是今早11時的可見光衛星雲圖。「人」字型的雲帶便是冷鋒（人字左邊）及暖鋒（人字右邊）的位置。 可見光衛星雲圖對監察熱帶氣旋作用很大。尤其當熱帶氣旋較弱，沒有明顯中心時，利用可見光衛星雲圖可幫助找出熱帶氣旋中心位置。 氣象衛星根據地球表面溫度分佈拍攝出來的影像稱為紅外線衛星雲圖。 上圖是今早同一時間的紅外線衛星雲圖，冷鋒及暖鋒的位置變得不明顯。 紅外線衛星雲圖以灰階表示雲頂溫度（cloud top temperature），黑色表示無雲的地區（海洋或陸地溫度最高），顏色越白表示溫度越低，可能與高雲或垂直發展活躍的低雲有關。春夏間香港常有大雨，利用紅外線衛星雲圖可監察大雨的發展及移動。 可見光衛星雲圖受太陽影響，晚間不適用，此時紅外線衛星雲圖便大派用場。<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"advanced_seo_description":"","jetpack_seo_html_title":"","jetpack_seo_noindex":false,"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[4],"tags":[],"class_list":["post-561","post","type-post","status-publish","format-standard","hentry","category-4"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.weather.org.hk\/news\/wp-json\/wp\/v2\/posts\/561","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.weather.org.hk\/news\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.weather.org.hk\/news\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.weather.org.hk\/news\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.weather.org.hk\/news\/wp-json\/wp\/v2\/comments?post=561"}],"version-history":[{"count":1,"href":"https:\/\/www.weather.org.hk\/news\/wp-json\/wp\/v2\/posts\/561\/revisions"}],"predecessor-version":[{"id":757,"href":"https:\/\/www.weather.org.hk\/news\/wp-json\/wp\/v2\/posts\/561\/revisions\/757"}],"wp:attachment":[{"href":"https:\/\/www.weather.org.hk\/news\/wp-json\/wp\/v2\/media?parent=561"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.weather.org.hk\/news\/wp-json\/wp\/v2\/categories?post=561"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.weather.org.hk\/news\/wp-json\/wp\/v2\/tags?post=561"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}