Representing the Australian Heat Low in a GCM Using Different Surface and Cloud Schemes
The high insolation during the Southern Hemisphere summer leads to the development of a heat low over north-west Australia, which is a significant feature of the monsoon circulation. It is therefore important that General Circulation Models (GCMs) are able to represent this feature well in order to...
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| Format: | Article |
| Language: | English |
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Wiley
2016-01-01
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| Series: | Advances in Meteorology |
| Online Access: | http://dx.doi.org/10.1155/2016/9702607 |
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| author | Matthew M. Allcock Duncan Ackerley |
| author_facet | Matthew M. Allcock Duncan Ackerley |
| author_sort | Matthew M. Allcock |
| collection | DOAJ |
| description | The high insolation during the Southern Hemisphere summer leads to the development of a heat low over north-west Australia, which is a significant feature of the monsoon circulation. It is therefore important that General Circulation Models (GCMs) are able to represent this feature well in order to adequately represent the Australian Monsoon. Given that there are many different configurations of GCMs used globally (such as those used as part of the Coupled Model Intercomparison Project), it is difficult to assess the underlying causes of the differences in circulation between such GCMs. In order to address this problem, the work presented here makes use of three different configurations of the Australian Community Climate and Earth System Simulator (ACCESS). The configurations incorporate changes to the surface parameterization, cloud parameterization, and both together (surface and cloud) while keeping all other parameterized processes unchanged. The work finds that the surface scheme has a larger impact on the heat low than the cloud scheme, which is caused by differences in the soil thermal inertia. This study also finds that the differences in the circulation caused by changing the cloud and surface schemes together are the linear sum of the individual perturbations (i.e., no nonlinear interaction). |
| format | Article |
| id | doaj-art-aaf6ac497cc84422b71ea592bd1477e2 |
| institution | Kabale University |
| issn | 1687-9309 1687-9317 |
| language | English |
| publishDate | 2016-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Meteorology |
| spelling | doaj-art-aaf6ac497cc84422b71ea592bd1477e22025-02-03T01:28:01ZengWileyAdvances in Meteorology1687-93091687-93172016-01-01201610.1155/2016/97026079702607Representing the Australian Heat Low in a GCM Using Different Surface and Cloud SchemesMatthew M. Allcock0Duncan Ackerley1ARC Centre of Excellence for Climate System Science, School of Earth, Atmosphere and Environment, Monash University, Clayton, VIC 3800, AustraliaARC Centre of Excellence for Climate System Science, School of Earth, Atmosphere and Environment, Monash University, Clayton, VIC 3800, AustraliaThe high insolation during the Southern Hemisphere summer leads to the development of a heat low over north-west Australia, which is a significant feature of the monsoon circulation. It is therefore important that General Circulation Models (GCMs) are able to represent this feature well in order to adequately represent the Australian Monsoon. Given that there are many different configurations of GCMs used globally (such as those used as part of the Coupled Model Intercomparison Project), it is difficult to assess the underlying causes of the differences in circulation between such GCMs. In order to address this problem, the work presented here makes use of three different configurations of the Australian Community Climate and Earth System Simulator (ACCESS). The configurations incorporate changes to the surface parameterization, cloud parameterization, and both together (surface and cloud) while keeping all other parameterized processes unchanged. The work finds that the surface scheme has a larger impact on the heat low than the cloud scheme, which is caused by differences in the soil thermal inertia. This study also finds that the differences in the circulation caused by changing the cloud and surface schemes together are the linear sum of the individual perturbations (i.e., no nonlinear interaction).http://dx.doi.org/10.1155/2016/9702607 |
| spellingShingle | Matthew M. Allcock Duncan Ackerley Representing the Australian Heat Low in a GCM Using Different Surface and Cloud Schemes Advances in Meteorology |
| title | Representing the Australian Heat Low in a GCM Using Different Surface and Cloud Schemes |
| title_full | Representing the Australian Heat Low in a GCM Using Different Surface and Cloud Schemes |
| title_fullStr | Representing the Australian Heat Low in a GCM Using Different Surface and Cloud Schemes |
| title_full_unstemmed | Representing the Australian Heat Low in a GCM Using Different Surface and Cloud Schemes |
| title_short | Representing the Australian Heat Low in a GCM Using Different Surface and Cloud Schemes |
| title_sort | representing the australian heat low in a gcm using different surface and cloud schemes |
| url | http://dx.doi.org/10.1155/2016/9702607 |
| work_keys_str_mv | AT matthewmallcock representingtheaustralianheatlowinagcmusingdifferentsurfaceandcloudschemes AT duncanackerley representingtheaustralianheatlowinagcmusingdifferentsurfaceandcloudschemes |