Northern Hemisphere midlatitude cyclone variability in GCM simulations
Abstract The impact of different ocean models or sea surface temperature (SST) and sea-ice concentrations on cyclone tracks in the Northern Hemisphere midlatitudes is determined within a hierarchy of model simulations. A reference simulation with the coupled atmosphere ocean circulation model ECHAM/...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.196.6661 2023-05-15T18:17:32+02:00 Northern Hemisphere midlatitude cyclone variability in GCM simulations C. C. Raible Æ R. Blender R. Blender The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.196.6661 http://www.climate.unibe.ch/~raible/Raib_blend_cyc.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.196.6661 http://www.climate.unibe.ch/~raible/Raib_blend_cyc.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.climate.unibe.ch/~raible/Raib_blend_cyc.pdf text ftciteseerx 2016-01-07T17:08:21Z Abstract The impact of different ocean models or sea surface temperature (SST) and sea-ice concentrations on cyclone tracks in the Northern Hemisphere midlatitudes is determined within a hierarchy of model simulations. A reference simulation with the coupled atmosphere ocean circulation model ECHAM/HOPE is compared with simulations using ECHAM and three simplified ocean and sea-ice representations: (1) a variable depth mixed layer (ML) ocean, (2) forcing by varying SST and seaice, and (3) with climatological SST and sea-ice; the latter two are from the coupled ECHAM/HOPE integration. The reference simulation reproduces the observed cyclone tracks. The cyclones are tracked automatically by a standard routine and the variability of individual cyclone trajectories within the storm tracks is determined by a cluster approach. In the forced simulation with varying SST, the geographical distribution and the statistics of the cyclones are not altered compared to the coupled reference simulation. In the MLand the climatological simulation, deviations of the mean cyclone distribution are found which occur mainly in the North Pacific, and can partially be traced back to missing El Nin ˜ o/Southern Oscillation (ENSO) variability. The climatological experiment is superior to the MLexperiment. The variability of the individual cyclone trajectories, as determined by the cluster analysis, reveals the same types and frequencies of propagation directions for all four representations of the lower boundary. The largest discrepancies for the cluster occupations are found for the climatological and the Text Sea ice Unknown Pacific |
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Abstract The impact of different ocean models or sea surface temperature (SST) and sea-ice concentrations on cyclone tracks in the Northern Hemisphere midlatitudes is determined within a hierarchy of model simulations. A reference simulation with the coupled atmosphere ocean circulation model ECHAM/HOPE is compared with simulations using ECHAM and three simplified ocean and sea-ice representations: (1) a variable depth mixed layer (ML) ocean, (2) forcing by varying SST and seaice, and (3) with climatological SST and sea-ice; the latter two are from the coupled ECHAM/HOPE integration. The reference simulation reproduces the observed cyclone tracks. The cyclones are tracked automatically by a standard routine and the variability of individual cyclone trajectories within the storm tracks is determined by a cluster approach. In the forced simulation with varying SST, the geographical distribution and the statistics of the cyclones are not altered compared to the coupled reference simulation. In the MLand the climatological simulation, deviations of the mean cyclone distribution are found which occur mainly in the North Pacific, and can partially be traced back to missing El Nin ˜ o/Southern Oscillation (ENSO) variability. The climatological experiment is superior to the MLexperiment. The variability of the individual cyclone trajectories, as determined by the cluster analysis, reveals the same types and frequencies of propagation directions for all four representations of the lower boundary. The largest discrepancies for the cluster occupations are found for the climatological and the |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
C. C. Raible Æ R. Blender R. Blender |
spellingShingle |
C. C. Raible Æ R. Blender R. Blender Northern Hemisphere midlatitude cyclone variability in GCM simulations |
author_facet |
C. C. Raible Æ R. Blender R. Blender |
author_sort |
C. C. Raible |
title |
Northern Hemisphere midlatitude cyclone variability in GCM simulations |
title_short |
Northern Hemisphere midlatitude cyclone variability in GCM simulations |
title_full |
Northern Hemisphere midlatitude cyclone variability in GCM simulations |
title_fullStr |
Northern Hemisphere midlatitude cyclone variability in GCM simulations |
title_full_unstemmed |
Northern Hemisphere midlatitude cyclone variability in GCM simulations |
title_sort |
northern hemisphere midlatitude cyclone variability in gcm simulations |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.196.6661 http://www.climate.unibe.ch/~raible/Raib_blend_cyc.pdf |
geographic |
Pacific |
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Pacific |
genre |
Sea ice |
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Sea ice |
op_source |
http://www.climate.unibe.ch/~raible/Raib_blend_cyc.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.196.6661 http://www.climate.unibe.ch/~raible/Raib_blend_cyc.pdf |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766191824043507712 |