dc.contributor.author | Joodaki, Gholamreza | |
dc.contributor.author | Nahavandchi, Hossein | |
dc.date.accessioned | 2019-10-15T07:38:29Z | |
dc.date.available | 2019-10-15T07:38:29Z | |
dc.date.created | 2012-08-15T13:27:39Z | |
dc.date.issued | 2012 | |
dc.identifier.citation | Journal of Geodetic Science. 2012, 2 (2), 156-161. | nb_NO |
dc.identifier.issn | 2081-9919 | |
dc.identifier.uri | http://hdl.handle.net/11250/2622138 | |
dc.description.abstract | We examine the magnitude and acceleration of the Greenland ice sheet mass loss between 2002 and 2011. We use monthly observations of time-variable gravity from the Gravity Recovery and Climate Experiment (GRACE) satellite gravity mission. The Greenland mass loss during this time period is not a constant, but accelerating with time. We have used a quadratic trend in addition to a linear trend, which is usually applied to the GRACE monthly time series of ice mass changes, to show that it better represents GRACE observations. Results of computations provide a mass decrease of -166±20 Gigatonne per year (Gt/yr) by using a linear trend and -111±21 Gt/yr by fitting a quadratic trend to the monthly time series. Quadratic fitting shows that the mass loss increases from -121 Gt/yr in 2002 - 2003 to -210 Gt/yr in 2006 - 2007 and -271 Gt/yr in 2010 - 2011 with an acceleration of -32±6 Gt/yr2 in 2002 - 2011. This implies that the Greenland ice sheet contribution to sea level rise becomes larger with time. Contrary to recent studies, we use a non-isotropic filter whose degree of smoothing corresponds to a Gaussian filter with a radius of 340 km. Stripping effects in the GRACE data, C20 effect, and leakage effects are applied. | nb_NO |
dc.description.abstract | Mass balance and mass loss acceleration of the Greenland ice sheet (2002 – 2011) from GRACE gravity data | nb_NO |
dc.language.iso | eng | nb_NO |
dc.publisher | de Gruyter | nb_NO |
dc.relation.uri | http://versita.metapress.com/content/llm6v452v33k7622/fulltext.pdf | |
dc.subject | Jordobservasjon | nb_NO |
dc.subject | Earth observation | nb_NO |
dc.subject | Klimaendringer | nb_NO |
dc.subject | Climate change | nb_NO |
dc.subject | Polarforskning | nb_NO |
dc.subject | Polar research | nb_NO |
dc.subject | Geodesi | nb_NO |
dc.subject | Geodesy | nb_NO |
dc.title | Mass balance and mass loss acceleration of the Greenland ice sheet (2002 – 2011) from GRACE gravity data | nb_NO |
dc.type | Journal article | nb_NO |
dc.type | Peer reviewed | nb_NO |
dc.description.version | publishedVersion | nb_NO |
dc.subject.nsi | VDP::Miljøteknologi: 610 | nb_NO |
dc.subject.nsi | VDP::Environmental engineering: 610 | nb_NO |
dc.source.pagenumber | 156-161 | nb_NO |
dc.source.volume | 2 | nb_NO |
dc.source.journal | Journal of Geodetic Science | nb_NO |
dc.source.issue | 2 | nb_NO |
dc.identifier.doi | 10.2478/v10156-011-0032-9 | |
dc.identifier.cristin | 938801 | |
dc.description.localcode | This content is open access. | nb_NO |
cristin.unitcode | 194,64,91,0 | |
cristin.unitname | Institutt for bygg- og miljøteknikk | |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 1 | |