Diurnally varying regional climatic simulations
Abstract A detailed analysis has been made of the atmospheric variability at a number of specific geographical points as simulated with a global general circulation model. The objective of this study was to assess the model's performance as regards diurnal and interdiurnal variability, but more...
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crwiley:10.1002/joc.3370090402 2024-06-02T08:14:20+00:00 Diurnally varying regional climatic simulations Hunt, B. G. Gordon, H. B. 1989 http://dx.doi.org/10.1002/joc.3370090402 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjoc.3370090402 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/joc.3370090402 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor International Journal of Climatology volume 9, issue 4, page 331-356 ISSN 0899-8418 1097-0088 journal-article 1989 crwiley https://doi.org/10.1002/joc.3370090402 2024-05-03T11:45:53Z Abstract A detailed analysis has been made of the atmospheric variability at a number of specific geographical points as simulated with a global general circulation model. The objective of this study was to assess the model's performance as regards diurnal and interdiurnal variability, but more importantly to identify critical features which should be monitored in climatic‐change experiments. Since the model contains a number of physical processes, including cloud forecasting, three independent rain‐producing mechanisms, a very responsive surface‐hydrology formulation, sea‐ice determination, etc., complex interactions among the various climatic components can occur. Results are presented for a number of longitudinal points at three selected latitudes, representative of summer, winter, and tropical conditions. One of the clearest features of the model output was the very marked longitudinal asymmetry in atmospheric forcing arising from land‐sea contrast. The vital role of the soil moisture, which depends critically on its model formulation, in determining whether this forcing is due to latent or sensible heating over the land is also demonstrated. The unique diurnal variations which were simulated at individual geographical points suggest that systematic distortions must occur in most near‐surface processes in non‐diurnal models. The extreme sensitivity of the convective mechanisms and the consequent impact on rainfall is noted, together with its implications for experiments involving climatic change. Finally, the interdiurnal variability of the model is illustrated by a number of examples, one of which highlights the potential misrepresentation of air‐sea exchanges in models employing fixed sea‐surface temperatures. Article in Journal/Newspaper Sea ice Wiley Online Library International Journal of Climatology 9 4 331 356 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract A detailed analysis has been made of the atmospheric variability at a number of specific geographical points as simulated with a global general circulation model. The objective of this study was to assess the model's performance as regards diurnal and interdiurnal variability, but more importantly to identify critical features which should be monitored in climatic‐change experiments. Since the model contains a number of physical processes, including cloud forecasting, three independent rain‐producing mechanisms, a very responsive surface‐hydrology formulation, sea‐ice determination, etc., complex interactions among the various climatic components can occur. Results are presented for a number of longitudinal points at three selected latitudes, representative of summer, winter, and tropical conditions. One of the clearest features of the model output was the very marked longitudinal asymmetry in atmospheric forcing arising from land‐sea contrast. The vital role of the soil moisture, which depends critically on its model formulation, in determining whether this forcing is due to latent or sensible heating over the land is also demonstrated. The unique diurnal variations which were simulated at individual geographical points suggest that systematic distortions must occur in most near‐surface processes in non‐diurnal models. The extreme sensitivity of the convective mechanisms and the consequent impact on rainfall is noted, together with its implications for experiments involving climatic change. Finally, the interdiurnal variability of the model is illustrated by a number of examples, one of which highlights the potential misrepresentation of air‐sea exchanges in models employing fixed sea‐surface temperatures. |
format |
Article in Journal/Newspaper |
author |
Hunt, B. G. Gordon, H. B. |
spellingShingle |
Hunt, B. G. Gordon, H. B. Diurnally varying regional climatic simulations |
author_facet |
Hunt, B. G. Gordon, H. B. |
author_sort |
Hunt, B. G. |
title |
Diurnally varying regional climatic simulations |
title_short |
Diurnally varying regional climatic simulations |
title_full |
Diurnally varying regional climatic simulations |
title_fullStr |
Diurnally varying regional climatic simulations |
title_full_unstemmed |
Diurnally varying regional climatic simulations |
title_sort |
diurnally varying regional climatic simulations |
publisher |
Wiley |
publishDate |
1989 |
url |
http://dx.doi.org/10.1002/joc.3370090402 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjoc.3370090402 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/joc.3370090402 |
genre |
Sea ice |
genre_facet |
Sea ice |
op_source |
International Journal of Climatology volume 9, issue 4, page 331-356 ISSN 0899-8418 1097-0088 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/joc.3370090402 |
container_title |
International Journal of Climatology |
container_volume |
9 |
container_issue |
4 |
container_start_page |
331 |
op_container_end_page |
356 |
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1800738144602030080 |