Status of surface processes in the LLNL zonally symmetric model
A surface package has been developed for use in the LLNL zonally symmetric model (ZSM). Surface energy balances are computed for both land and ocean. The ocean is modeled as a well-mixed slab, the land as a single layer with constant thermal conductivity. A land surface moisture budget includes rain...
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ftosti:oai:osti.gov:7256214 2023-07-30T04:06:46+02:00 Status of surface processes in the LLNL zonally symmetric model Gleckler, P.J. ) 2020-09-04 application/pdf http://www.osti.gov/servlets/purl/7256214 https://www.osti.gov/biblio/7256214 https://doi.org/10.2172/7256214 unknown http://www.osti.gov/servlets/purl/7256214 https://www.osti.gov/biblio/7256214 https://doi.org/10.2172/7256214 doi:10.2172/7256214 54 ENVIRONMENTAL SCIENCES ATMOSPHERIC CIRCULATION MATHEMATICAL MODELS CLIMATES COMPUTERIZED SIMULATION SURFACES ATMOSPHERIC PRECIPITATIONS EARTH ATMOSPHERE GLOBAL ASPECTS SIMULATION 2020 ftosti https://doi.org/10.2172/7256214 2023-07-11T10:55:21Z A surface package has been developed for use in the LLNL zonally symmetric model (ZSM). Surface energy balances are computed for both land and ocean. The ocean is modeled as a well-mixed slab, the land as a single layer with constant thermal conductivity. A land surface moisture budget includes rain, evaporation, sublimation, snowfall, snowmelt and runoff. There is a highly simplified parameterization of surface albedo for freezing oceans and snow covered land. Land and sea air is instantly mixed' by averaging pertinent land and sea surface variables (weighted by their respective areas in each zone) before use in subsequent atmospheric computations. Initial tests have demonstrated that the surface package is working properly. It has been demonstrated that the model produces a reasonable annually averaged' climate. There are some aspects of ZSM which need to be improved, most notably that of cloud cover. The next stage in the development is to test the model in seasonal mode. An improved treatment of surface albedo is currently being coded. When ZSM has been tested in seasonal mode, a sea ice routine will be added to the surface package. There are also plans to implement a method which accounts for the interaction between land and sea air. 5 refs., 15 figs. Other/Unknown Material Sea ice SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
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Open Polar |
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SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
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ftosti |
language |
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topic |
54 ENVIRONMENTAL SCIENCES ATMOSPHERIC CIRCULATION MATHEMATICAL MODELS CLIMATES COMPUTERIZED SIMULATION SURFACES ATMOSPHERIC PRECIPITATIONS EARTH ATMOSPHERE GLOBAL ASPECTS SIMULATION |
spellingShingle |
54 ENVIRONMENTAL SCIENCES ATMOSPHERIC CIRCULATION MATHEMATICAL MODELS CLIMATES COMPUTERIZED SIMULATION SURFACES ATMOSPHERIC PRECIPITATIONS EARTH ATMOSPHERE GLOBAL ASPECTS SIMULATION Gleckler, P.J. ) Status of surface processes in the LLNL zonally symmetric model |
topic_facet |
54 ENVIRONMENTAL SCIENCES ATMOSPHERIC CIRCULATION MATHEMATICAL MODELS CLIMATES COMPUTERIZED SIMULATION SURFACES ATMOSPHERIC PRECIPITATIONS EARTH ATMOSPHERE GLOBAL ASPECTS SIMULATION |
description |
A surface package has been developed for use in the LLNL zonally symmetric model (ZSM). Surface energy balances are computed for both land and ocean. The ocean is modeled as a well-mixed slab, the land as a single layer with constant thermal conductivity. A land surface moisture budget includes rain, evaporation, sublimation, snowfall, snowmelt and runoff. There is a highly simplified parameterization of surface albedo for freezing oceans and snow covered land. Land and sea air is instantly mixed' by averaging pertinent land and sea surface variables (weighted by their respective areas in each zone) before use in subsequent atmospheric computations. Initial tests have demonstrated that the surface package is working properly. It has been demonstrated that the model produces a reasonable annually averaged' climate. There are some aspects of ZSM which need to be improved, most notably that of cloud cover. The next stage in the development is to test the model in seasonal mode. An improved treatment of surface albedo is currently being coded. When ZSM has been tested in seasonal mode, a sea ice routine will be added to the surface package. There are also plans to implement a method which accounts for the interaction between land and sea air. 5 refs., 15 figs. |
author |
Gleckler, P.J. ) |
author_facet |
Gleckler, P.J. ) |
author_sort |
Gleckler, P.J. ) |
title |
Status of surface processes in the LLNL zonally symmetric model |
title_short |
Status of surface processes in the LLNL zonally symmetric model |
title_full |
Status of surface processes in the LLNL zonally symmetric model |
title_fullStr |
Status of surface processes in the LLNL zonally symmetric model |
title_full_unstemmed |
Status of surface processes in the LLNL zonally symmetric model |
title_sort |
status of surface processes in the llnl zonally symmetric model |
publishDate |
2020 |
url |
http://www.osti.gov/servlets/purl/7256214 https://www.osti.gov/biblio/7256214 https://doi.org/10.2172/7256214 |
genre |
Sea ice |
genre_facet |
Sea ice |
op_relation |
http://www.osti.gov/servlets/purl/7256214 https://www.osti.gov/biblio/7256214 https://doi.org/10.2172/7256214 doi:10.2172/7256214 |
op_doi |
https://doi.org/10.2172/7256214 |
_version_ |
1772819672979210240 |