\u4e7e\u51cd\u53ca\u6fd5\u51cd\u7684\u7814\u7a76<\/a>\uff0c\u5617\u8a66\u5236\u5b9a\u9810\u6e2c850\u767e\u5e15\u69fd\u52d5\u5411\u7684\u6307\u6a19\uff0c\u4e0d\u904e\u4e0d\u592a\u6210\u529f\u3002<\/p>\n\u5982\u679c\u60f3\u5229\u7528\u6578\u503c\u9810\u5831\u5716\u9810\u6e2c\u4e7e\u51cd\u9084\u662f\u6fd5\u51cd\uff0c\u5c31\u770b850\u767e\u5e15\u98a8\u5411\u5427\u3002\u53ea\u8981\u662f\u5317\u98a8\uff0c\u4ee3\u8868\u51b7\u7a7a\u6c23\u5920\u539a\uff0c\u4e7e\u51cd\u842c\u91cc\u7121\u96f2\u7684\u5929\u6c23\u3002\u5982\u679c\u5439\u5357\u98a8\u6216\u6771\u5357\u98a8\uff0c\u4ee3\u8868\u51b7\u6696\u7a7a\u6c23\u5728\u4ea4\u6230\uff0c\u96e3\u4ee5\u5929\u6674\u3002<\/p>\n
\u4e7e\u51cd\u901a\u5e38\u51fa\u73fe\u5728\u51ac\u5b63\u524d\u534a\u90e8\u30021\u6708\u4e2d\u83ef\u5357\u4e0a\u7a7a\u6696\u7a7a\u6c23\u958b\u59cb\u589e\u5f37\uff0c\u6fd5\u51cd\u7684\u65e5\u5b50\u5c31\u6703\u589e\u591a\u3002<\/p>\n
\u6211\u6e96\u5099\u4e86 ECMWF \u00a0\u53ca GFS \u904e\u53bb\u4e09\u65e5\u7684850\u767e\u5e15\u9810\u5831\u5716\u53ca\u5be6\u6cc1\u5716\u7d66\u5927\u5bb6\u53c3\u8003\u3002<\/p>\n
PS \u5982\u679c\u6fd5\u51cd\u7684\u8a71\uff0c\u5c31\u8981\u770b\u66f4\u9ad8\u5c64\uff08700\/500\u767e\u5e15\uff09\u5929\u6c23\u60c5\u6cc1\u30022016\u5e741\u6708\u7684\u4e16\u7d00\u5bd2\u6f6e\uff0c\u5c31\u662f\u6fd5\u51cd\u52a0\u9ad8\u5c64\u77ed\u6ce2\u69fd\u9020\u6210\u3002\u5f8c\u8a71\u3002<\/p>\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
乾凍與濕凍，前者人體感覺比較好。地面同樣吹北風，但分別就是在850百帕（～1.5公里）上空。 冬季華南上空冷暖空氣經常交戰，在850百帕可以分析出一條槽（類似地面的低壓槽，但在等壓面天氣圖中說「低壓槽」是不正確，所以說槽就可以）。這條槽的位置就決定香港的天氣。 如果槽線在香港以北，香港上空吹偏南風，受暖空氣影響，就會形成多雲甚至有雨天氣。如果槽線在香港以南（甚至消散），香港上空吹偏北風，受冷空氣影響，天氣就晴朗。 天文台曾做過乾凍及濕凍的研究，嘗試制定預測850百帕槽動向的指標，不過不太成功。 如果想利用數值預報圖預測乾凍還是濕凍，就看850百帕風向吧。只要是北風，代表冷空氣夠厚，乾凍萬里無雲的天氣。如果吹南風或東南風，代表冷暖空氣在交戰，難以天晴。 乾凍通常出現在冬季前半部。1月中華南上空暖空氣開始增強，濕凍的日子就會增多。 我準備了 ECMWF 及 GFS 過去三日的850百帕預報圖及實況圖給大家參考。 PS 如果濕凍的話，就要看更高層（700\/500百帕）天氣情況。2016年1月的世紀寒潮，就是濕凍加高層短波槽造成。後話。<\/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-552","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\/552","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=552"}],"version-history":[{"count":2,"href":"https:\/\/www.weather.org.hk\/news\/wp-json\/wp\/v2\/posts\/552\/revisions"}],"predecessor-version":[{"id":3256,"href":"https:\/\/www.weather.org.hk\/news\/wp-json\/wp\/v2\/posts\/552\/revisions\/3256"}],"wp:attachment":[{"href":"https:\/\/www.weather.org.hk\/news\/wp-json\/wp\/v2\/media?parent=552"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.weather.org.hk\/news\/wp-json\/wp\/v2\/categories?post=552"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.weather.org.hk\/news\/wp-json\/wp\/v2\/tags?post=552"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}