{"id":336,"date":"2023-05-26T13:24:17","date_gmt":"2023-05-26T13:24:17","guid":{"rendered":"http:\/\/snow.geus.dk\/?p=336"},"modified":"2023-05-26T13:24:46","modified_gmt":"2023-05-26T13:24:46","slug":"historic-greenland-ice-sheet-rainfall-unravelled","status":"publish","type":"post","link":"https:\/\/snow.geus.dk\/index.php\/2023\/05\/26\/historic-greenland-ice-sheet-rainfall-unravelled\/","title":{"rendered":"Web Story: Historic Greenland ice sheet rainfall unravelled"},"content":{"rendered":"\n

ESA Web Story – 25\/05\/2022<\/p>\n\n\n\n

For the first time ever recorded, in the late summer of 2021, rain fell on the high central region of the Greenland ice sheet. This extraordinary event was followed by the surface snow and ice melting rapidly. Researchers now understand exactly what went on in those fateful summer days and what we can learn from it.<\/p>\n\n\n\n

The never-before-seen rainfall, on 14 August 2021, made headlines around the world. The upper-most parts of Greenland\u2019s enormous ice cap used to be too cold for anything other than snow to fall, but not anymore.<\/p>\n\n\n\n

What caused this extreme rainfall and how did it affect the ice?<\/p>\n\n\n\n

Researchers from the Department of Glaciology and Climate at the Geological Survey of Denmark and Greenland (GEUS) in collaboration with colleagues from France and Switzerland have scrutinised these questions and come up with the answers.<\/p>\n\n\n\n

It didn\u2019t only rain at Summit Camp \u2013 rain was measured by new automatic weather stations placed across the ice sheet by GEUS\u2019 ice-sheet monitoring projects PROMICE and GC-Net.<\/p>\n\n\n\n

Studying detailed data from these stations alongside measurements of surface reflectivity, or albedo, from the Copernicus Sentinel-3 satellite mission and information on atmospheric circulation patterns, the researchers discovered that the rain had been preceded by a heatwave at a time of year when seasonal melting is usually slowing down.<\/p>\n\n\n\n

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

red more at the ESA Web Story<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

ESA Web Story – 25\/05\/2022 For the first time ever recorded, in the late summer of 2021, rain fell on the high central region of the Greenland ice sheet. This extraordinary event was followed by the surface snow and ice melting rapidly. Researchers now understand exactly what went on in those fateful summer days and … Continue reading “Web Story: Historic Greenland ice sheet rainfall unravelled”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"jetpack_publicize_message":"","jetpack_is_tweetstorm":false,"jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","enabled":false}}},"categories":[1],"tags":[],"jetpack_publicize_connections":[],"aioseo_notices":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/paxG8S-5q","jetpack-related-posts":[{"id":69,"url":"https:\/\/snow.geus.dk\/index.php\/2017\/07\/20\/greenland-ice-sheet-undulations-in-low-solar-illumination-angle-sentinel-3-imagery\/","url_meta":{"origin":336,"position":0},"title":"Greenland ice sheet undulations in low solar illumination angle Sentinel-3 imagery","date":"July 20, 2017","format":false,"excerpt":"illuminated by low solar angles, this late 2016\u00a0Sentinel-3 OLCI image spectacularly features Greenland ice sheet undulations.","rel":"","context":"In "Sentinel-3 monitors the cryosphere"","img":{"alt_text":"Sentinel-3 OLCI 864 29 October, 2016 1415 UTC","src":"https:\/\/i0.wp.com\/snow.geus.dk\/wp-content\/uploads\/2016_10_29_14h15m_RGB_864-1024x779.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":240,"url":"https:\/\/snow.geus.dk\/index.php\/2020\/05\/07\/web-story-snow-grain-size-it-matters\/","url_meta":{"origin":336,"position":1},"title":"Web Story: Snow grain size \u2013 it matters","date":"May 7, 2020","format":false,"excerpt":"link to 29 MAY 2019 Web Story Snow grain size \u2013 it matters Most of us probably wouldn\u2019t think of describing snow in terms of its grain size. However, grain size is fundamental to the amount of sunlight that snow reflects back into space \u2013 its albedo. With both snow\u2026","rel":"","context":"Similar post","img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":61,"url":"https:\/\/snow.geus.dk\/index.php\/2017\/07\/10\/snow-blankets-the-greenland-melt-zone\/","url_meta":{"origin":336,"position":2},"title":"snow blankets the Greenland melt zone","date":"July 10, 2017","format":false,"excerpt":"at a time when melting should be in full force and precipitation should perhaps be liquid that solid, Sentinel-3 OLCI provides\u00a0views of a snow blanketed\u00a0western Greenland ice sheet ablation area. (above) 5\u00a0July, 2017 1458 UTC, we see surface meltwater lakes poking through fresh snow and even some snow on land\u2026","rel":"","context":"In "Sentinel-3 monitors the cryosphere"","img":{"alt_text":"20170705_1458_rgb","src":"https:\/\/i0.wp.com\/snow.geus.dk\/wp-content\/uploads\/20170705_1458_RGB.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":111,"url":"https:\/\/snow.geus.dk\/index.php\/2017\/11\/01\/snow-albedo-validation-publications\/","url_meta":{"origin":336,"position":3},"title":"snow albedo validation publications","date":"November 1, 2017","format":false,"excerpt":"Box, J.E., D. van As, K. Steffen, 2017. Greenland, Canadian and Icelandic land ice albedo grids (2000-2016), Geological Survey of Denmark and Greenland Bulletin, 38, 53-56.\u00a0http:\/\/www.geus.dk\/DK\/publications\/geol-survey-dk-gl-bull\/38\/Documents\/nr38_p53-56.pdf Hall, D. K., G. A. Riggs, and V.V. Salomonson (1995). Development of Methods for Mapping Global Snow Cover Using Moderate Resolution Imaging Spectroradiometer Data.\u2026","rel":"","context":"Similar post","img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":85,"url":"https:\/\/snow.geus.dk\/index.php\/2017\/09\/24\/daily-greenland-arctic-canada-and-iceland-land-ice-albedo-grids\/","url_meta":{"origin":336,"position":4},"title":"daily Greenland, Arctic Canada and Iceland land ice albedo grids","date":"September 24, 2017","format":false,"excerpt":"Daily 0.5 km, 1 km and 5 km resolution Greenland, Arctic Canada and Iceland glaciated area albedo grids are available beginning April 2000 and (currently ending) September, 2017. The data are\u00a0based on NASA MOD10A1 Collection 6 data\u00a0with de-noising, gap filling, and bias correction after\u00a0Box et al. (2017). The grids are\u2026","rel":"","context":"In "data"","img":{"alt_text":"","src":"https:\/\/i0.wp.com\/snow.geus.dk\/wp-content\/uploads\/Fig-1-albedo-product-787x1024.png?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":41,"url":"https:\/\/snow.geus.dk\/index.php\/2017\/06\/22\/collocated-sentinel-3-olci-and-slstr-reflectance-imagery\/","url_meta":{"origin":336,"position":5},"title":"Collocated Sentinel-3 OLCI and SLSTR reflectance imagery","date":"June 22, 2017","format":false,"excerpt":"The S3 4Sci Snow research project is gaining momentum, now with scripts that enable batch processing of\u00a0two important steps: 1.) collocating OLCI and SLSTR imagery, that is, aligning pixels to a common geographic grid and 2.) converting the imagery to top of the atmosphere reflectance. (above, 22 August 2016 southern\u2026","rel":"","context":"Similar post","img":{"alt_text":"20160822-s3-band-21-1020-nm-greenland","src":"https:\/\/i0.wp.com\/snow.geus.dk\/wp-content\/uploads\/20160822-S3-band-21-1020-nm-Greenland.png?resize=350%2C200","width":350,"height":200},"classes":[]}],"_links":{"self":[{"href":"https:\/\/snow.geus.dk\/index.php\/wp-json\/wp\/v2\/posts\/336"}],"collection":[{"href":"https:\/\/snow.geus.dk\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/snow.geus.dk\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/snow.geus.dk\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/snow.geus.dk\/index.php\/wp-json\/wp\/v2\/comments?post=336"}],"version-history":[{"count":4,"href":"https:\/\/snow.geus.dk\/index.php\/wp-json\/wp\/v2\/posts\/336\/revisions"}],"predecessor-version":[{"id":341,"href":"https:\/\/snow.geus.dk\/index.php\/wp-json\/wp\/v2\/posts\/336\/revisions\/341"}],"wp:attachment":[{"href":"https:\/\/snow.geus.dk\/index.php\/wp-json\/wp\/v2\/media?parent=336"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/snow.geus.dk\/index.php\/wp-json\/wp\/v2\/categories?post=336"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/snow.geus.dk\/index.php\/wp-json\/wp\/v2\/tags?post=336"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}