de.mpg.escidoc.pubman.appbase.FacesBean
English
 
Contact usLogin
  Advanced SearchBrowse

Item

 
 
 
 
DownloadE-Mail
  Updating ESA’s Earth System Model for Gravity Mission Simulation Studies : 1. Model Description and Validation

Dobslaw, H., Bergmann-Wolf, I., Dill, R., Forootan, E., Klemann, V., Kusche, J., Sasgen, I. (2014): Updating ESA’s Earth System Model for Gravity Mission Simulation Studies: 1. Model Description and Validation, (Scientific Technical Report ; 14/07), Potsdam : Deutsches GeoForschungsZentrum GFZ, 69 p.
DOI: http://doi.org/10.2312/GFZ.b103-14079

Fulltext: 1407.pdf



Item is

Basic

show hide
Version Permalink: http://gfzpublic.gfz-potsdam.de/pubman/item/escidoc:546893:5
Genre: Report

Files

show Files
hide Files
:
1407.pdf (Publisher version), 11MB
Description:
-
Visibility:
Public
MIME-Type / Checksum:
application/pdf / [MD5]
Technical Metadata:
Copyright Date:
-
Copyright Info:
-

Locators

show
hide
Locator:
http://doi.org/10.5880/GFZ.1.3.2014.001 (Supplementary material)
Description:
Supplementary Dataset

Creators

show
hide
 Creators:
Dobslaw , Henryk1, 2, Author              
Bergmann-Wolf , I.1, 2, Author              
Dill, R.1, 2, Author              
Forootan, E.1, 3, Author
Klemann, Volker1, 2, Author              
Kusche, Jürgen1, 3, Author              
Sasgen, I.1, 2, Author              
Affiliations:
1Scientific Technical Report STR, Deutsches GeoForschungsZentrum, escidoc:9026              
21.3 Earth System Modelling, 1.0 Geodesy and Remote Sensing, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum, escidoc:146027              
3External Organizations, escidoc:persistent22              

Content

show
hide
Free keywords: -
 Abstract: The ability of any satellite gravity mission concept to monitor mass transport processes in the Earth system is typically tested well ahead of its implementation by means of various simulation studies. Those studies often extend from the simulation of realistic orbits and instrumental data all the way down to the retrieval of global gravity field solution time-series. Basic requirement for all these simulations are realistic representations of the spatio-temporal mass variability in the different sub-systems of the Earth, as a source model for the orbit computations. For such simulations, a suitable source model is required to represent (i) high-frequency (i.e., subdaily to weekly) mass variability in the atmosphere and oceans, in order to realistically include the effects of temporal aliasing due to non-tidal high-frequency mass variability into the retrieved gravity fields. In parallel, (ii) low-frequency (i.e., monthly to interannual) variability needs to be modelled with realistic amplitudes, particularly at small spatial scales, in order to assess to what extent a new mission concept might provide further insight into physical processes currently not observable. The new source model documented here attempts to fulfil both requirements: Based on ECMWF’s recent atmospheric reanalysis ERA-Interim and corresponding simulations from numerical models of the other Earth system components, it offers spherical harmonic coefficients of the time-variable global gravity field due to mass variability in atmosphere, oceans, the terrestrial hydrosphere including the ice-sheets and glaciers, as well as the solid Earth. Simulated features range from sub-daily to multiyear periods with a spatial resolution of spherical harmonics degree and order 180 over a period of 12 years. In addition to the source model, a de-aliasing model for atmospheric and oceanic high-frequency variability with augmented systematic and random noise is required for a realistic simulation of the gravity field retrieval process, whose necessary error characteristics are discussed. The documentation of the updated ESA Earth System Model (updated ESM) for gravity mission simulation studies is organized as follows: The characteristics of the updated ESM along with some basic validation is presented in Volume 1. A detailed comparison to the original ESA ESM (Gruber et al., 2011) is provided in Volume 2, while Volume 3 contains the description of a strategy to derive realistic errors for the de-aliasing model of high-frequency mass variability in atmosphere and ocean.

Details

show
hide
Language(s): eng - English
 Dates: 2014
 Pages: 69
 Publishing info: Potsdam : Deutsches GeoForschungsZentrum GFZ
 Table of Contents: -
 Rev. Method: -
 Degree: -

Event

show

Legal Case

show

Source 1

show
hide
Title: Scientific Technical Report
Source Genre: Series
 Creator(s):
-
Affiliations:
-
Publ. Info: Potsdam : Deutsches GeoForschungsZentrum GFZ
Pages: 69 Volume / Issue: 14/07 Sequence Number: - Start / End Page: 1 - 69 Identifier: ISSN: 1610-0956