{"id":613,"date":"2008-02-01T06:00:00","date_gmt":"2008-01-31T22:00:00","guid":{"rendered":"http:\/\/www.weather.org.hk\/blog\/?p=613"},"modified":"2010-11-11T18:20:07","modified_gmt":"2010-11-11T10:20:07","slug":"%e9%9b%aa%e7%81%bd%e5%85%83%e5%85%87","status":"publish","type":"post","link":"https:\/\/www.weather.org.hk\/news\/%e9%9b%aa%e7%81%bd%e5%85%83%e5%85%87\/","title":{"rendered":"\u96ea\u707d\u5143\u5147"},"content":{"rendered":"

\t\t\t\t\t\t\t\t\t\u83ef\u4e2d\u53ca\u83ef\u5357\u7684\u96ea\u707d\u9020\u6210\u4ea4\u901a\u7671\u7613\u3001\u96fb\u529b\u4e2d\u65b7\u3002\u4f46\u6700\u5927\u7684\u5143\u5147\u4e0d\u662f\u96ea\uff0c\u800c\u662f\u51cd\u96e8\u3002<\/p>\n\n

\u51cd\u96e8\uff08freezing rain\uff09\u662f\u6eab\u5ea6\u4f4e\u65bc0\u5ea6\u7684\u96e8\uff0c\u7531\u904e\u51b7\u537b\u6c34\uff08supercooled water\uff09\u7d44\u6210\u3002\u7531\u65bc\u904e\u51b7\u537b\u6c34\u6027\u8cea\u4e0d\u7a69\u5b9a\uff0c\u63a5\u89f8\u7269\u4ef6\u5f8c\u6703\u7d50\u6210\u51b0\uff0c\u5f62\u6210\u96e8\u6dde\uff08\u6216\u7a31\u6a39\u639b\uff09\u3002\u516c\u8def\u7d50\u51b0\u5f8c\u8b8a\u5f97\u975e\u5e38\u6fd5\u6ed1\uff0c\u8eca\u8f1b\u7121\u6cd5\u884c\u99db\uff0c\u6e05\u7406\u7d50\u51b0\u4ea6\u8f03\u7a4d\u96ea\u56f0\u96e3\uff1b\u67b6\u7a7a\u96fb\u7e9c\u7d50\u51b0\u5f8c\u8b8a\u5f97\u7570\u5e38\u6c89\u91cd\uff0c\u96fb\u5854\u7121\u6cd5\u8ca0\u8377\u5012\u584c\uff0c\u96fb\u529b\u4e2d\u65b7\uff1b\u8fb2\u4f5c\u7269\u88ab\u51b0\u5c01\u51cd\u58de\uff0c\u8fb2\u6c11\u7121\u6cd5\u6536\u5272\u6216\u8015\u7a2e\uff0c\u640d\u5931\u6158\u91cd\u3002<\/p>\n

\"Picture\"
\uff08\u5716\u7247\u4f86\u6e90\uff1aWikipedia<\/a>\uff09<\/p>\n

\u51cd\u96e8\u7684\u6210\u56e0\u6709\u5e7e\u500b\u689d\u4ef6\uff1a
1. \u6c34\u6c7d\u5145\u8db3
2. \u5730\u9762\u6c23\u6eab\u9577\u6642\u9593\u4f4e\u65bc0\u5ea6
3. \u9ad8\u7a7a\u6709\u9006\u6eab\u5c64\uff08inversion\uff09\uff0c\u6c23\u6eab\u6bd4\u5730\u9762\u9ad8<\/p>\n

\u6c34\u6c7d\u5145\u8db3\u63d0\u4f9b\u6301\u7e8c\u964d\u96ea\u7684\u689d\u4ef6\uff0c\u96ea\u5230\u9054\u9006\u6eab\u5c64\u6642\u878d\u5316\u6210\u96e8\uff0c\u4f46\u63a5\u8fd1\u5730\u9762\u6642\u96e8\u8fc5\u901f\u51b7\u537b\u6210\u70ba\u904e\u51b7\u537b\u96e8\u6ef4\uff0c\u63a5\u89f8\u5730\u9762\u7684\u7269\u4ef6\u5f8c\u4fbf\u7d50\u6210\u51b0\u3002<\/p>\n

\u5728\u516c\u8def\u4e0a\u7051\u9e7d\uff0c\u53ef\u4ee5\u964d\u4f4e\u6c34\u7684\u51b0\u9ede\uff0c\u4ee4\u51b0\u878d\u5316\uff0c\u9632\u6b62\u8def\u9762\u7d50\u51b0\u3002<\/p>\n

\u5ef6\u4f38\u95b1\u8b80\uff1a
Freezing rain<\/a>
\u5c08\u5bb6\u89e3\u6790\u6e56\u5357\u7f55\u898b\u51b0\u51cd\u5929\u6c23<\/a>
Using salt and sand for winter road maintenance<\/a><\/p>\n

\u00a0<\/p>\n

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

華中及華南的雪災造成交通癱瘓、電力中斷。但最大的元兇不是雪，而是凍雨。 凍雨（freezing rain）是溫度低於0度的雨，由過冷卻水（supercooled water）組成。由於過冷卻水性質不穩定，接觸物件後會結成冰，形成雨淞（或稱樹掛）。公路結冰後變得非常濕滑，車輛無法行駛，清理結冰亦較積雪困難；架空電纜結冰後變得異常沉重，電塔無法負荷倒塌，電力中斷；農作物被冰封凍壞，農民無法收割或耕種，損失慘重。 （圖片來源：Wikipedia） 凍雨的成因有幾個條件：1. 水汽充足2. 地面氣溫長時間低於0度3. 高空有逆溫層（inversion），氣溫比地面高 水汽充足提供持續降雪的條件，雪到達逆溫層時融化成雨，但接近地面時雨迅速冷卻成為過冷卻雨滴，接觸地面的物件後便結成冰。 在公路上灑鹽，可以降低水的冰點，令冰融化，防止路面結冰。 延伸閱讀：Freezing rain專家解析湖南罕見冰凍天氣Using salt and sand for winter road maintenance  <\/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-613","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\/613","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=613"}],"version-history":[{"count":1,"href":"https:\/\/www.weather.org.hk\/news\/wp-json\/wp\/v2\/posts\/613\/revisions"}],"predecessor-version":[{"id":706,"href":"https:\/\/www.weather.org.hk\/news\/wp-json\/wp\/v2\/posts\/613\/revisions\/706"}],"wp:attachment":[{"href":"https:\/\/www.weather.org.hk\/news\/wp-json\/wp\/v2\/media?parent=613"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.weather.org.hk\/news\/wp-json\/wp\/v2\/categories?post=613"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.weather.org.hk\/news\/wp-json\/wp\/v2\/tags?post=613"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}