{"id":222270,"date":"2022-10-05T12:07:16","date_gmt":"2022-10-05T10:07:16","guid":{"rendered":"https:\/\/climatescience.press\/?p=222270"},"modified":"2022-10-05T12:07:19","modified_gmt":"2022-10-05T10:07:19","slug":"days-get-longer-when-the-wind-blows-say-met-office-researchers","status":"publish","type":"post","link":"https:\/\/climatescience.press\/?p=222270","title":{"rendered":"Days get longer when the wind blows, say Met Office researchers"},"content":{"rendered":"
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Credit: Wikipedia<\/figcaption><\/figure>\n<\/div>\n\n\n

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

Interesting, if the suggested predictions work. Tallbloke identified this<\/a> 13 years ago.<\/em>
\u2013 \u2013 \u2013
How long is a day on earth? The obvious answer of 24 hours is accurate enough for many applications, says the Met Office blog<\/a>.<\/em><\/p>\n\n\n\n

But for those interested in GPS or deep space, then understanding the fluctuations of about one millisecond in the length of a day can be fundamentally important.<\/p>\n\n\n\n

A team at the Met Office, led by Professor Adam Scaife, has calculated that these length of day fluctuations are predictable out to more than one year ahead and this is all to do with predicting the strength of atmospheric winds.<\/p>\n\n\n\n

The stronger the winds blow around the Earth, the slower the Earth rotates to compensate and hence the longer the length of day. The findings were published yesterday in Nature Geoscience.<\/p>\n\n\n\n

Commenting on his research, Professor Scaife said: \u201cThe fact that global winds can affect the speed of the Earth\u2019s rotation is a consequence of Newton\u2019s laws of physics and has been known for a long time. What\u2019s new here is that we can predict these fluctuations many months and even a year or two ahead.<\/p>\n\n\n\n

\u201cAlthough the change in the rotation of the Earth has no direct effect on the atmosphere (it\u2019s just too small), the compensating change in the winds is much bigger and is strong enough to change regional weather and climate.<\/p>\n\n\n\n

\u201cIt turns out that the jet stream in the mid-latitudes is affected with a lag of about a year after the length of day first changes in the tropics (often triggered by El Ni\u00f1o or La Ni\u00f1a). This has applications in long-range forecasting and is another piece in the puzzle of long-range weather prediction.\u201d<\/p>\n\n\n\n

One of the really novel things the team discovered is that these predictable signals are lurking in the atmosphere and are not in the ocean where we normally look for long-range weather and climate signals.<\/p>\n\n\n\n

\u201cThis means that there is a long-term memory within the atmosphere \u2013 opening all sorts of interesting possibilities.\u201c<\/p>\n\n\n\n

Full blog post here<\/a>.<\/em><\/p>\n\n\n\n

Paper:\u00a0Long-range predictability of extratropical climate and the length of day<\/a><\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

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

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

via Tallbloke’s Talkshop<\/mark><\/em><\/strong><\/p>\n\n\n\n

October 5, 2022, by\u00a0oldbrew<\/strong><\/p>\n\n\n\n

Days get longer when the wind blows, say Met Office researchers | Tallbloke’s Talkshop (wordpress.com)<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

How long is a day on earth? The obvious answer of 24 hours is accurate enough for many applications. <\/p>\n","protected":false},"author":121246920,"featured_media":222274,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_coblocks_attr":"","_coblocks_dimensions":"","_coblocks_responsive_height":"","_coblocks_accordion_ie_support":"","_crdt_document":"","advanced_seo_description":"","jetpack_seo_html_title":"","jetpack_seo_noindex":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":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[1],"tags":[],"class_list":{"0":"post-222270","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","6":"hentry","7":"category-uncategorized","9":"fallback-thumbnail"},"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2022\/10\/image-216.png?fit=1280%2C720&ssl=1","jetpack_likes_enabled":true,"jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/paxLW1-VP0","jetpack-related-posts":[{"id":413145,"url":"https:\/\/climatescience.press\/?p=413145","url_meta":{"origin":222270,"position":0},"title":"The Curious Case of the Missing Data","author":"uwe.roland.gross","date":"13\/11\/2025","format":false,"excerpt":"I shall end with two unanswered questions. 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