New Gravity Wave Treatments for GISS Climate Models
Previous versions of GISS climate models have either used formulations of Rayleigh drag to represent unresolved gravity wave interactions with the model-resolved flow or have included a rather complicated treatment of unresolved gravity waves that, while being climate interactive, involved the speci...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | en_US |
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American Meteorological Society
2012
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| Online Access: | http://hdl.handle.net/1721.1/69946 |
| _version_ | 1811082599825670144 |
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| author | Geller, Marvin A. Zhou, Tiehan Ruedy, Reto Aleinov, Igor Nazarenko, Larissa Tausnev, Nikolai L. Sun, Shan Kelley, Maxwell Cheng, Ye |
| author2 | Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences |
| author_facet | Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences Geller, Marvin A. Zhou, Tiehan Ruedy, Reto Aleinov, Igor Nazarenko, Larissa Tausnev, Nikolai L. Sun, Shan Kelley, Maxwell Cheng, Ye |
| author_sort | Geller, Marvin A. |
| collection | MIT |
| description | Previous versions of GISS climate models have either used formulations of Rayleigh drag to represent unresolved gravity wave interactions with the model-resolved flow or have included a rather complicated treatment of unresolved gravity waves that, while being climate interactive, involved the specification of a relatively large number of parameters that were not well constrained by observations and also was computationally very expensive. Here, the authors introduce a relatively simple and computationally efficient specification of unresolved orographic and nonorographic gravity waves and their interaction with the resolved flow. Comparisons of the GISS model winds and temperatures with no gravity wave parameterization; with only orographic gravity wave parameterization; and with both orographic and nonorographic gravity wave parameterizations are shown to illustrate how the zonal mean winds and temperatures converge toward observations. The authors also show that the specifications of orographic and nonorographic gravity waves must be different in the Northern and Southern Hemispheres. Then results are presented where the nonorographic gravity wave sources are specified to represent sources from convection in the intertropical convergence zone and spontaneous emission from jet imbalances. Finally, a strategy to include these effects in a climate-dependent manner is suggested. |
| first_indexed | 2024-09-23T12:05:58Z |
| format | Article |
| id | mit-1721.1/69946 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T12:05:58Z |
| publishDate | 2012 |
| publisher | American Meteorological Society |
| record_format | dspace |
| spelling | mit-1721.1/699462022-09-28T00:05:15Z New Gravity Wave Treatments for GISS Climate Models Geller, Marvin A. Zhou, Tiehan Ruedy, Reto Aleinov, Igor Nazarenko, Larissa Tausnev, Nikolai L. Sun, Shan Kelley, Maxwell Cheng, Ye Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences Sun, Shan Sun, Shan Previous versions of GISS climate models have either used formulations of Rayleigh drag to represent unresolved gravity wave interactions with the model-resolved flow or have included a rather complicated treatment of unresolved gravity waves that, while being climate interactive, involved the specification of a relatively large number of parameters that were not well constrained by observations and also was computationally very expensive. Here, the authors introduce a relatively simple and computationally efficient specification of unresolved orographic and nonorographic gravity waves and their interaction with the resolved flow. Comparisons of the GISS model winds and temperatures with no gravity wave parameterization; with only orographic gravity wave parameterization; and with both orographic and nonorographic gravity wave parameterizations are shown to illustrate how the zonal mean winds and temperatures converge toward observations. The authors also show that the specifications of orographic and nonorographic gravity waves must be different in the Northern and Southern Hemispheres. Then results are presented where the nonorographic gravity wave sources are specified to represent sources from convection in the intertropical convergence zone and spontaneous emission from jet imbalances. Finally, a strategy to include these effects in a climate-dependent manner is suggested. Goddard Space Flight Center United States. National Aeronautics and Space Administration (Atmospheric Composition: Modeling and Analysis Program) 2012-04-05T15:04:36Z 2012-04-05T15:04:36Z 2011-08 2010-08 Article http://purl.org/eprint/type/JournalArticle 0894-8755 1520-0442 http://hdl.handle.net/1721.1/69946 Geller, Marvin A. et al. “New Gravity Wave Treatments for GISS Climate Models.” Journal of Climate 24.15 (2011): 3989–4002. en_US http://dx.doi.org/10.1175/2011jcli4013.1 Journal of Climate Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Meteorological Society American Meteorological Society |
| spellingShingle | Geller, Marvin A. Zhou, Tiehan Ruedy, Reto Aleinov, Igor Nazarenko, Larissa Tausnev, Nikolai L. Sun, Shan Kelley, Maxwell Cheng, Ye New Gravity Wave Treatments for GISS Climate Models |
| title | New Gravity Wave Treatments for GISS Climate Models |
| title_full | New Gravity Wave Treatments for GISS Climate Models |
| title_fullStr | New Gravity Wave Treatments for GISS Climate Models |
| title_full_unstemmed | New Gravity Wave Treatments for GISS Climate Models |
| title_short | New Gravity Wave Treatments for GISS Climate Models |
| title_sort | new gravity wave treatments for giss climate models |
| url | http://hdl.handle.net/1721.1/69946 |
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