Diagnostic Comparison of Meteorological Analyses during the 2002 Antarctic Winter

Manney, Gloria L.; Allen, Douglas R.; Krüger, Kristin; Naujokat, Barbara; Santee, Michelle L.; Sabutis, Joseph L.; Pawson, Steven; Swinbank, Richard; Randall, Cora E.; Simmons, Adrian J.; Long, Craig
May 2005
Monthly Weather Review;May2005, Vol. 133 Issue 5, p1261
Academic Journal
Several meteorological datasets, including U.K. Met Office (MetO), European Centre for Medium-Range Weather Forecasts (ECMWF), National Centers for Environmental Prediction (NCEP), and NASA’s Goddard Earth Observation System (GEOS-4) analyses, are being used in studies of the 2002 Southern Hemisphere (SH) stratospheric winter and Antarctic major warming. Diagnostics are compared to assess how these studies may be affected by the meteorological data used. While the overall structure and evolution of temperatures, winds, and wave diagnostics in the different analyses provide a consistent picture of the large-scale dynamics of the SH 2002 winter, several significant differences may affect detailed studies. The NCEP–NCAR reanalysis (REAN) and NCEP–Department of Energy (DOE) reanalysis-2 (REAN-2) datasets are not recommended for detailed studies, especially those related to polar processing, because of lower-stratospheric temperature biases that result in underestimates of polar processing potential, and because their winds and wave diagnostics show increasing differences from other analyses between ∼30 and 10 hPa (their top level). Southern Hemisphere polar stratospheric temperatures in the ECMWF 40-Yr Re-analysis (ERA-40) show unrealistic vertical structure, so this long-term reanalysis is also unsuited for quantitative studies. The NCEP/Climate Prediction Center (CPC) objective analyses give an inferior representation of the upper-stratospheric vortex. Polar vortex transport barriers are similar in all analyses, but there is large variation in the amount, patterns, and timing of mixing, even among the operational assimilated datasets (ECMWF, MetO, and GEOS-4). The higher-resolution GEOS-4 and ECMWF assimilations provide significantly better representation of filamentation and small-scale structure than the other analyses, even when fields gridded at reduced resolution are studied. The choice of which analysis to use is most critical for detailed transport studies (including polar process modeling) and studies involving synoptic evolution in the upper stratosphere. The operational assimilated datasets are better suited for most applications than the NCEP/CPC objective analyses and the reanalysis datasets (REAN/REAN-2 and ERA-40).


Related Articles

  • Impacts of A Priori Databases Using Six WRF Microphysics Schemes on Passive Microwave Rainfall Retrievals. Kim, Ju-Hye; Shin, Dong-Bin; Kummerow, Christian // Journal of Atmospheric & Oceanic Technology;Oct2013, Vol. 30 Issue 10, p2367 

    Physically based rainfall retrievals from passive microwave sensors often make use of cloud-resolving models (CRMs) to build a priori databases of potential rain structures. Each CRM, however, has its own cloud microphysics assumptions. Hence, approximated microphysics may cause uncertainties in...

  • A FINGERPRINTING TECHNIQUE FOR MAJOR WEATHER EVENTS.  // Bulletin of the American Meteorological Society;Sep2007, Vol. 88 Issue 9, p1353 

    The article discusses the fingerprinting technique, which uses pattern-recognition, for making weather predictions. It is stated that pattern recognition and forecast analogs provide a solution to the problems associated with weather forecasting. The fingerprinting approach is based on the...

  • Use of Information by National Weather Service Forecasters and Emergency Managers during CALJET and PACJET-2001. Morss, Rebecca E.; Ralph, F. Martin // Weather & Forecasting;Jun2007, Vol. 22 Issue 3, p539 

    Winter storms making landfall in western North America can generate heavy precipitation and other significant weather, leading to floods, landslides, and other hazards that cause significant damage and loss of life. To help alleviate these negative impacts, the California Land-falling Jets...

  • Precipitation Forecast Verification of the Indian Summer Monsoon with Intercomparison of Three Diverse Regions. Mandal, Vikramaditya; De, Utpal K.; Basu, Biplab K. // Weather & Forecasting;Jun2007, Vol. 22 Issue 3, p428 

    The Indian summer monsoon precipitation forecast, as well as its verification, are always of great interest because of their socioeconomic impact on the Indian subcontinent. The present work highlights the verification of quantitative precipitation forecasts of the Global Spectral Model, running...

  • THE CHASE. Schiller, Paul // South Dakota Magazine;Jul/Aug2006, Vol. 22 Issue 2, p40 

    Describes the experience of a team of meteorologists at KELOLand TV in covering the weather condition called a supercell. Members of the team; Facilities of the TV station used in covering the phenomenon; Reason cited by Jay Trobec, captain of the team, for chasing the storm; Information on how...

  • WegenerNet climate station network region Feldbach, Austria: network structure, processing system, and example results. Kabas, T.; Leuprecht, A.; Bichler, C.; Kirchengast, G. // Advances in Science & Research;2011, Vol. 6, p49 

    The article offers information on the WegenerNet climate station network in Feldbach, Austria. The said station network has at least 151 meteorological stations and it has weather and climate-related experiments with high resolution. The WegenerNet also consists instrument used in climatic and...

  • Meteorological observations of the coastal boundary layer structure at the Bulgarian Black Sea coast. Barantiev, D.; Novitsky, M.; Batchvarova, E. // Advances in Science & Research;2011, Vol. 6, p251 

    The article presents a research study which focuses on the meteorological observation condition of the coastal boundary layer structure in the Black Sea coastal region of Bulgaria. It mentions the implementation of the turbulence and continuous wind profile measurements to determine the climatic...

  • Gridded North American Monthly Snow Depth and Snow Water Equivalent for GCM Evaluation. Brown, Ross D.; Brasnett, Bruce; Robinson, David // Atmosphere -- Ocean (Canadian Meteorological & Oceanographic Soc;Mar2003, Vol. 41 Issue 1, p1 

    Evaluation of snow cover in GCMs has been hampered by a lack of reliable gridded estimates of snow water equivalent (SWE) at continental scales. In order to address this gap, a snow depth analysis scheme developed by Brasnett (1999) and employed operationally at the Canadian Meteorological...

  • Short-Term Ice Accretion Forecasts for Electric Utilities Using the Weather Research and Forecasting Model and a Modified Precipitation-Type Algorithm. DeGaetano, Arthur T.; Belcher, Brian N.; Spier, Pamela L. // Weather & Forecasting;Oct2008, Vol. 23 Issue 5, p838 

    The Weather Research and Forecasting model (WRF) is used to provide 6–12-h forecasts of the necessary input parameters to a separate algorithm that determines the most likely precipitation type at each model grid point. In instances where freezing rain is indicated, an ice accretion model...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics