A new convective adjustment scheme
A marked divergence in philosophy is presented. The primary objective of the proposed parameterization scheme is to ensure that the local vertical temperature and moisture structures, which in nature are strongly constrained by convection, be realistic in the large scale model. The concept of a quas...
Main Author: | |
---|---|
Format: | Other/Unknown Material |
Language: | unknown |
Published: |
1985
|
Subjects: | |
Online Access: | http://ntrs.nasa.gov/search.jsp?R=19860014688 |
id |
ftnasantrs:oai:casi.ntrs.nasa.gov:19860014688 |
---|---|
record_format |
openpolar |
spelling |
ftnasantrs:oai:casi.ntrs.nasa.gov:19860014688 2023-05-15T15:06:21+02:00 A new convective adjustment scheme Betts, A. K. Unclassified, Unlimited, Publicly available Oct 1, 1985 http://ntrs.nasa.gov/search.jsp?R=19860014688 unknown http://ntrs.nasa.gov/search.jsp?R=19860014688 Accession ID: 86N24159 No Copyright CASI 47 NAS-NRC Proceedings of the First National Workshop on the Global Weather Experiment, Vol. 2, Pt. 2; p 706-724 1985 ftnasantrs 2012-02-15T16:35:55Z A marked divergence in philosophy is presented. The primary objective of the proposed parameterization scheme is to ensure that the local vertical temperature and moisture structures, which in nature are strongly constrained by convection, be realistic in the large scale model. The concept of a quasi-equilibrium between the cloud field and the large-scale forcing has been well established. This means that convective regions have characteristic temperature and moisture structures that can be documented observationally and used as the basis of a convective adjustment procedure. In the scheme proposed here, the temperature and moisture structures will be adjusted simultaneously toward observed quasi-equilibrium structures. This ensures that on the grid scale a global model always maintains a realistic vertical temperature and moisture structure in the presence of convection. The saturation point formulation of moist thermodynamics will be used to introduce the observational and theoretical basis of the proposed convective adjustment. The scheme is then applied to a series of data sets from GATE, BOMEX, ATEX and an Arctic air-mass transformation to show the sensitivity of the scheme to different parameters and develop a parameter set suitable for both shallow and deep convection in a global model. Other/Unknown Material Arctic NASA Technical Reports Server (NTRS) Arctic |
institution |
Open Polar |
collection |
NASA Technical Reports Server (NTRS) |
op_collection_id |
ftnasantrs |
language |
unknown |
topic |
47 |
spellingShingle |
47 Betts, A. K. A new convective adjustment scheme |
topic_facet |
47 |
description |
A marked divergence in philosophy is presented. The primary objective of the proposed parameterization scheme is to ensure that the local vertical temperature and moisture structures, which in nature are strongly constrained by convection, be realistic in the large scale model. The concept of a quasi-equilibrium between the cloud field and the large-scale forcing has been well established. This means that convective regions have characteristic temperature and moisture structures that can be documented observationally and used as the basis of a convective adjustment procedure. In the scheme proposed here, the temperature and moisture structures will be adjusted simultaneously toward observed quasi-equilibrium structures. This ensures that on the grid scale a global model always maintains a realistic vertical temperature and moisture structure in the presence of convection. The saturation point formulation of moist thermodynamics will be used to introduce the observational and theoretical basis of the proposed convective adjustment. The scheme is then applied to a series of data sets from GATE, BOMEX, ATEX and an Arctic air-mass transformation to show the sensitivity of the scheme to different parameters and develop a parameter set suitable for both shallow and deep convection in a global model. |
format |
Other/Unknown Material |
author |
Betts, A. K. |
author_facet |
Betts, A. K. |
author_sort |
Betts, A. K. |
title |
A new convective adjustment scheme |
title_short |
A new convective adjustment scheme |
title_full |
A new convective adjustment scheme |
title_fullStr |
A new convective adjustment scheme |
title_full_unstemmed |
A new convective adjustment scheme |
title_sort |
new convective adjustment scheme |
publishDate |
1985 |
url |
http://ntrs.nasa.gov/search.jsp?R=19860014688 |
op_coverage |
Unclassified, Unlimited, Publicly available |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
CASI |
op_relation |
http://ntrs.nasa.gov/search.jsp?R=19860014688 Accession ID: 86N24159 |
op_rights |
No Copyright |
_version_ |
1766337973827141632 |