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Erratum to “On secular geocenter motion: The impact of climate changes” / Laurent Métivier in Earth and planetary science letters, vol 306 n° 1-2 (June 2011)

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[article]
inEarth and planetary science letters > vol 306 n° 1-2 (June 2011) . - p 136

Titre :	Erratum to “On secular geocenter motion: The impact of climate changes”
Type de document :	Article/Communication
Auteurs :	Laurent Métivier , Auteur ; Marianne Greff-Lefftz, Auteur ; Zuheir Altamimi , Auteur
Année de publication :	2011
Article en page(s) :	p 136
Langues :	Anglais (eng)
Descripteur :	[Vedettes matières IGN] Géodésie physique
Résumé :	(auteur) In the above article, a sign error has been made in the calculation of the z-component of geocenter velocity “more probable” solutions (dark blue in Fig. 4), when considering the Antarctica ice melting contribution. This error affects slightly the results presented in Fig. 4. The correct figure is printed below.
Numéro de notice :	A2011-612
Affiliation des auteurs :	LAREG (1991-2011)
Thématique :	POSITIONNEMENT
Nature :	Article
nature-HAL :	ArtAvecCL-RevueIntern
DOI :	10.1016/j.epsl.2011.03.026
Date de publication en ligne :	17/04/2011
En ligne :	https://doi.org/10.1016/j.epsl.2011.03.026
Format de la ressource électronique :	URL article
Permalink :	https://documentation.ensg.eu/index.php?lvl=notice_display&id=91735

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On secular geocenter motion: The impact of climate changes / Laurent Métivier in Earth and planetary science letters, vol 296 n° 3-4 (August 2010)

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[article]
inEarth and planetary science letters > vol 296 n° 3-4 (August 2010) . - pp 360 - 366

Titre :	On secular geocenter motion: The impact of climate changes
Type de document :	Article/Communication
Auteurs :	Laurent Métivier , Auteur ; Marianne Greff-Lefftz, Auteur ; Zuheir Altamimi , Auteur
Année de publication :	2010
Article en page(s) :	pp 360 - 366
Note générale :	bibliographie
Langues :	Anglais (eng)
Descripteur :	[Vedettes matières IGN] Géodésie physique [Termes IGN] changement climatique [Termes IGN] eau de fonte [Termes IGN] géocentre [Termes IGN] International Terrestrial Reference Frame [Termes IGN] mouvement du géocentre [Termes IGN] système de référence mondial
Résumé :	(auteur) We investigate the impact of recent climate changes on the long-term displacement of the Center of Figure (CF) of the Earth (also defined as the geocenter in our convention) with respect to the Center of Mass of the whole Earth (CM). The two realizations of the International Terrestrial Reference System (ITRS), entitled ITRF2000 and ITRF2005, present a difference of 1.8 mm/yr between the velocities of their respective frame origins, suggesting an acceleration of the geocenter towards the North Pole. We investigate if such a displacement could be explained by geophysical phenomena, such as the present ice melting and the sea level rise. Using published observations on ice caps and glaciers, we calculated the range of geocenter motion that may occur today. We found that the global ice melting induces long-term displacements of the geocenter mainly along the Z-axis, toward the North Pole. The geocenter velocity is today between 0.3 and 0.7–0.8 mm/yr and has doubled during last decade with the recent acceleration of ice melting. Combining with Greff-Lefftz (2000) results on post-glacial rebound, we conclude that a present secular geocenter velocity of 1 mm/yr is possible. However, the recent increase of the geocenter velocity cannot explain the difference observed between the two last realizations of the ITRS. Our results comfort the previous conclusions about ITRF2000 and ITRF2005 and the pre-analysis of ITRF2008 data, suggesting that the large Z-translation rate between the ITRS realizations is probably due to an imprecise ITRF2000 origin. Finally, we show that determining precisely the geocenter velocity would give a new type of information that may be useful to more precisely constrain mass exchanges associated with climate changes.
Numéro de notice :	A2010-615
Affiliation des auteurs :	IGN+Ext (1940-2011)
Thématique :	POSITIONNEMENT
Nature :	Article
nature-HAL :	ArtAvecCL-RevueIntern
DOI :	10.1016/j.epsl.2010.05.021
Date de publication en ligne :	29/06/2010
En ligne :	https://doi.org/10.1016/j.epsl.2010.05.021
Format de la ressource électronique :	URL article
Permalink :	https://documentation.ensg.eu/index.php?lvl=notice_display&id=86682

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IGN

Centre de documentationscientifique

Accueil

Sélection de la langue

Adresse

Se connecter

Actualité

L'actu ! Horaires du CDOS

Informations pratiques

IGN / ENSG

L'IGN a pour vocation

Accès directs

2014 -2024 IGN

Centre de documentation
scientifique