{"id":1662,"date":"2016-10-20T07:00:09","date_gmt":"2016-10-20T12:00:09","guid":{"rendered":"https:\/\/www.csr.utexas.edu\/?p=1662"},"modified":"2020-08-31T17:24:29","modified_gmt":"2020-08-31T22:24:29","slug":"spatio-temporal-surface-mass-redistribution-in-amazon-and-greenland-recovered-by-grace","status":"publish","type":"post","link":"https:\/\/utw10640.utweb.utexas.edu\/wordpress\/spatio-temporal-surface-mass-redistribution-in-amazon-and-greenland-recovered-by-grace\/","title":{"rendered":"10-20-16 | Spatio-temporal surface mass redistribution in Amazon and Greenland recovered by GRACE"},"content":{"rendered":"<h5><span style=\"color: #000080;\">Speaker<\/span><\/h5>\n<p><strong>Dr. Jooyoung Eom<\/strong><br \/>\n<em>Korea Polar Research Institute<\/em><\/p>\n<h5><span style=\"color: #000080;\">Time and Place<\/span><\/h5>\n<p><strong>October 20, 2016\u00a0\u2013 Thursday\u00a0\u2013 3:00 PM<\/strong><br \/>\nWPR Building, Conference Room 2.806<br \/>\n3925 W. Braker Lane, Suite 200, Austin, Texas 78759<\/p>\n<p>Empirical Orthogonal Functions (EOF) method is examined to separate signals associated with surface mass variation from GRACE errors in Amazon Basin and Greenland Ice Sheet (GrIS). Because the two regions are different climatologically and geographically, spatio-temporal variability of signal and error in GRACE are distinct. Therefore, rotated EOF (REOF) and extended EOF (EEOF), which are modified version of conventional EOF, are used for different features of signal and error in the two regions. In Amazon Basin, the river discharge is estimated using water mass variation on the main stem. To achieve this, the terrestrial water storage (TWS) changes confined to the main stem have to be extracted not only from the GRACE error, but also from TWS variations adjacent to the main stem. In Greenland, detail month-to-month ice mass variations are estimated based on from separation between signal and aliasing error.<\/p>\n<p>The REOF method over the \u00d3bidos sub-basin successfully estimates river discharge in the basin. The resulting time series represents relative river discharge variations consistent to in-situ discharge estimate. However, the estimates are generally larger than in-situ data in high water seasons. The REOF method is extended to the entire Amazon Basin based on the results for \u00d3bidos sub-basin.<\/p>\n<p>The EEOF provides higher temporal and spatial ice mass variations in GrIS, and this method is superior to the spatial filtering conventionally used in this region. In particular, results of EEOF remarkably agree with surface mass balance (SMB) outputs of regional climate model during winter season when SMB is a major contributor to mass changes in GrIS. On the base of this consistency, GRACE observations and the regional climate model are used to retrieve ice discharge near the coastal region. The GRACE-based ice discharge remarkably agrees with results independently obtained from ice thickness and velocity survey in amplitude and spatial distribution.<\/p>\n<p>Coffee &amp; cookies will be served<br \/>\nFor further information, please contact 471-5573<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Speaker Dr. Jooyoung Eom Korea Polar Research Institute Time and Place October 20, 2016\u00a0\u2013 Thursday\u00a0\u2013 3:00 PM WPR Building, Conference Room 2.806 3925 W. Braker Lane, Suite 200, Austin, Texas [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[19],"tags":[],"_links":{"self":[{"href":"https:\/\/utw10640.utweb.utexas.edu\/wordpress\/wp-json\/wp\/v2\/posts\/1662"}],"collection":[{"href":"https:\/\/utw10640.utweb.utexas.edu\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/utw10640.utweb.utexas.edu\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/utw10640.utweb.utexas.edu\/wordpress\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/utw10640.utweb.utexas.edu\/wordpress\/wp-json\/wp\/v2\/comments?post=1662"}],"version-history":[{"count":2,"href":"https:\/\/utw10640.utweb.utexas.edu\/wordpress\/wp-json\/wp\/v2\/posts\/1662\/revisions"}],"predecessor-version":[{"id":1677,"href":"https:\/\/utw10640.utweb.utexas.edu\/wordpress\/wp-json\/wp\/v2\/posts\/1662\/revisions\/1677"}],"wp:attachment":[{"href":"https:\/\/utw10640.utweb.utexas.edu\/wordpress\/wp-json\/wp\/v2\/media?parent=1662"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/utw10640.utweb.utexas.edu\/wordpress\/wp-json\/wp\/v2\/categories?post=1662"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/utw10640.utweb.utexas.edu\/wordpress\/wp-json\/wp\/v2\/tags?post=1662"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}