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Comparison of the Tangent Linear Properties of Tracer Transport Schemes Applied to Geophysical Problems.A number of geophysical applications require the use of the linearized version of the full model. One such example is in numerical weather prediction, where the tangent linear and adjoint versions of the atmospheric model are required for the 4DVAR inverse problem. The part of the model that represents the resolved scale processes of the atmosphere is known as the dynamical core. Advection, or transport, is performed by the dynamical core. It is a central process in many geophysical applications and is a process that often has a quasi-linear underlying behavior. However, over the decades since the advent of numerical modelling, significant effort has gone into developing many flavors of high-order, shape preserving, nonoscillatory, positive definite advection schemes. These schemes are excellent in terms of transporting the quantities of interest in the dynamical core, but they introduce nonlinearity through the use of nonlinear limiters. The linearity of the transport schemes used in Goddard Earth Observing System version 5 (GEOS-5), as well as a number of other schemes, is analyzed using a simple 1D setup. The linearized version of GEOS-5 is then tested using a linear third order scheme in the tangent linear version.
Document ID
20150010242
Acquisition Source
Goddard Space Flight Center
Document Type
Presentation
Authors
Kent, James (University of South Wales United Kingdom)
Holdaway, Daniel (Universities Space Research Association Greenbelt, MD, United States)
Date Acquired
June 9, 2015
Publication Date
April 12, 2015
Subject Category
Geophysics
Meteorology And Climatology
Report/Patent Number
GSFC-E-DAA-TN23356
Meeting Information
Meeting: European Geosciences Union General Assembly 2015
Location: Vienna
Country: Austria
Start Date: April 12, 2015
End Date: April 17, 2015
Sponsors: European Geosciences Union
Funding Number(s)
CONTRACT_GRANT: NNG11HP16A
Distribution Limits
Public
Copyright
Public Use Permitted.
Keywords
4DVAR
Numerical Modelling
GEOS-5

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