Climatological features of blocking anticyclones: a study of Northern Hemisphere CCM1 model blocking events in present-day and double CO2 concentration atmospheres

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Climatological features of blocking anticyclones: a study of Northern Hemisphere CCM1 model blocking events in present-day and double CO2 concentration atmospheres

Please use this identifier to cite or link to this item: http://hdl.handle.net/10355/2507

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dc.contributor.author Oglesby, R. J. en
dc.contributor.author Mokhov, Igor I. en
dc.contributor.author Lupo, Anthony R., 1966- en
dc.date.accessioned 2009-09-09T19:06:04Z en
dc.date.available 2009-09-09T19:06:04Z en
dc.date.issued 1997 en
dc.identifier.citation Climate Dynamics (1997) 13: 181-195. en
dc.identifier.issn 0930-7575 en
dc.identifier.uri http://hdl.handle.net/10355/2507 en
dc.description http://solberg.snr.missouri.edu/gcc/ en
dc.description.abstract Using output made with the National Center for Atmospheric Research (NCAR) Community Climate Model Version 1 (CCM1), the characteristics of blocking events over the Northern Hemisphere in a ten-year present day control simulation with a CO2 concentration of 330 ppm were compared to those in a previously analyzed observational three-year climatology. The characteristics of blocking events in a double present-day CO2 concentration simulation were then compared to those in the control simulation in order to evaluate how these characteristics might change in an increased CO2 atmosphere. The results demonstrated that in the Northern Hemisphere the CCM1 correctly simulated many characteristics of blocking events such as average annual number of occurrences, annual variations is size and intensity, and preferred formation regions. A more detailed analysis (i.e., by region and season) revealed some di¤erences between the CCM1 and observed blocking events for characteristics such as mean frequency of occurrence, intensity, size and duration. In addition, the model failed to capture adequately the occurrence of blocking events over the western Asian continent. A comparison of the double CO2 concentration run to the control showed that, in general, blocking events were more persistent and weaker, but of similar size in the increased CO2 atmosphere. Also, some statistically signiÞcant regional and seasonally dependent changes were found in the frequency of occurrence, duration, and intensity. Finally, a correlation between block size and intensity, signiÞcant at the 99% conÞdence level, was found in each climatology. This result is similar to a correlation found in the analysis of observations. en
dc.language.iso en_US en
dc.publisher Springer-Verlag en
dc.source.uri http://solberg.snr.missouri.edu/gcc/ en
dc.subject blocking events en
dc.subject atmospheric science en
dc.subject National Center for Atmosphere Research en
dc.subject.lcsh Atmospheric physics en
dc.subject.lcsh Environmental sciences en
dc.subject.lcsh Anticyclones en
dc.subject.lcsh Climatology en
dc.subject.lcsh Blocking (Meteorology) en
dc.title Climatological features of blocking anticyclones: a study of Northern Hemisphere CCM1 model blocking events in present-day and double CO2 concentration atmospheres en
dc.type Article en
dc.contributor.corporatename University of Missouri-Columbia. College of Agriculture, Food and Natural Resources (CAFNR). School of Natural Resources. Department of Soil, Environmental and Atmospheric Sciences. en
dc.relation.ispartofcommunity University of Missouri-Columbia. College of Agriculture, Food and Natural Resources. School of Natural Resources. Department of Soil, Environmental and Atmospheric Sciences
dc.relation.ispartofcollection Soil, Environmental and Atmospheric Sciences publications (MU)


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