Modeling of Atmospheric Gravity Effects for High-Precision Observations

Show simple item record

dc.identifier.uri http://dx.doi.org/10.15488/1531
dc.identifier.uri http://www.repo.uni-hannover.de/handle/123456789/1556
dc.contributor.author Gitlein, Olga
dc.contributor.author Timmen, Ludger
dc.contributor.author Müller, Jürgen
dc.date.accessioned 2017-05-22T11:59:04Z
dc.date.available 2017-05-22T11:59:04Z
dc.date.issued 2013
dc.identifier.citation Gitlein, O.; Timmen, L.; Müller, J.: Modeling of Atmospheric Gravity Effects for High-Precision Observations. In: International Journal of Geosciences 4 (2013), S. 663-671. DOI: https://doi.org/10.4236/ijg.2013.44061
dc.description.abstract Temporal variations of atmospheric density distribution induce changes in the gravitational air mass attraction at a specific observation site. Additionally, the load of the atmospheric masses deforms the Earth’s crust and the sea surface. Variations in the local gravity acceleration and atmospheric pressure are known to be corrected with an admittance of about 3 nm/s2 per hPa as a standard factor, which is in accordance with the IAG Resolution No. 9, 1983. A more accurate admittance factor for a gravity station is varying with time and depends on the total global mass distribution within the atmosphere. The Institut für Erdmessung (IfE) performed absolute gravity observations in the Fennoscandian land uplift area nearly every year from 2003 to 2008. The objective is to ensure a reduction with 3 nm/s2 accuracy. Therefore, atmospheric gravity changes are modeled using globally distributed ECMWF data. The attraction effect from the local zone around the gravity station is calculated with ECMWF 3D weather data describing different pressure levels up to a height of 50 km. To model the regional and global attraction, and all deformation components the Green’s functions method and surface ECMWF 2D weather data are used. For the annually performed absolute gravimetry determinations, this approach improved the reductions by 8 nm/s2 (-19 nm/s2 to +4 nm/s2). The gravity modeling was verified using superconducting gravimeter data at station Membach inBelgiumimproving the residuals by about 15%. eng
dc.language.iso eng
dc.publisher Delaware : Scientific Research Publishing Inc.
dc.relation.ispartofseries International Journal of Geosciences 4 (2013), Nr. 4
dc.rights CC BY 4.0 Unported
dc.rights.uri https://creativecommons.org/licenses/by/4.0/
dc.subject Atmospheric Reduction eng
dc.subject Green’s Functions eng
dc.subject ECMWF eng
dc.subject Absolute Gravimetry eng
dc.subject Superconducting Gravimeter eng
dc.subject.ddc 550 | Geowissenschaften ger
dc.title Modeling of Atmospheric Gravity Effects for High-Precision Observations
dc.type article
dc.type Text
dc.relation.essn 2156-8367
dc.relation.issn 2156-8359
dc.relation.doi https://doi.org/10.4236/ijg.2013.44061
dc.bibliographicCitation.issue 4
dc.bibliographicCitation.volume 4
dc.bibliographicCitation.firstPage 663
dc.bibliographicCitation.lastPage 671
dc.description.version publishedVersion
tib.accessRights frei zug�nglich


Files in this item

This item appears in the following Collection(s):

Show simple item record

 

Search the repository


Browse

My Account

Usage Statistics