{"id":23587,"date":"2021-04-30T21:22:45","date_gmt":"2021-05-01T02:22:45","guid":{"rendered":"https:\/\/www.realclimate.org\/?p=23587"},"modified":"2021-04-30T21:36:55","modified_gmt":"2021-05-01T02:36:55","slug":"nenana-ice-classic-2021","status":"publish","type":"post","link":"https:\/\/www.realclimate.org\/index.php\/archives\/2021\/04\/nenana-ice-classic-2021\/","title":{"rendered":"Nenana Ice Classic 2021"},"content":{"rendered":"
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And…. it’s that time again<\/a>. The clock stopped on the Nenana ice classic<\/a> this afternoon (April 30, 12:50pm AT). This is pretty much on trend and unsurprising given the relatively slightly cool winter in Alaska. The jackpot on offer this year was $233,591 but will likely be shared among several winners. This year’s ‘break up’ is a little odd, since the ice moved sufficiently to trigger the clock, but not enough to actually topple the tripod (which is still visible as this is being written (9pm ET) – Update 10:30pm ET: gone now though!). But, the rules are the rules…<\/p>\n\n\n\n

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Nenana Ice Classic break-up dates since 1917.<\/figcaption><\/figure>\n\n\n\n

The trends in the break up date is about 8 days earlier per century (\u00b14), estimated over the whole record, but substantially faster over the last 50 years (16 \u00b1 12 days\/century, 95% CI). <\/p>\n\n\n\n

Other phenological records show similar trends, notably the longest cherry blossom record from Kyoto<\/a> which dates back to 9th Century, and which had a record earliest peak bloom this year and a clear trend over the last few decades:<\/p>\n\n\n\n

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Kyoto Cherry Blossom trends (graph from Statista<\/a>)<\/figcaption><\/figure>\n\n\n\n

Feel free to link to your favorite such record in the comments…<\/p>\n\n<\/div> ","protected":false},"excerpt":{"rendered":"

The Nenana Ice Classic continues its trend towards earlier break ups.<\/p>\n","protected":false},"author":2,"featured_media":23588,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[1,9],"tags":[],"class_list":["post-23587","post","type-post","status-publish","format-standard","has-post-thumbnail","category-climate-science","category-instrumental-record","entry"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t