TITLE

A Dynamical Downscaling Case Study for Typhoons in Southeast Asia Using a Regional Climate Model

AUTHOR(S)
Feser, Frauke; von Storch, Hans
PUB. DATE
May 2008
SOURCE
Monthly Weather Review;May2008, Vol. 136 Issue 5, p1806
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
This study explores the possibility of reconstructing the weather of Southeast Asia for the last decades using an atmospheric regional climate model, the Climate version of the Lokal-Modell (CLM). For this purpose global National Centers for Environmental Prediction–National Center for Atmospheric Research (NCEP–NCAR) reanalyses data were dynamically downscaled to 50 km and in a double-nesting approach to 18-km grid distance. To prevent the regional model from deviating significantly from the reanalyses with respect to large-scale circulation and large-scale weather phenomena, a spectral nudging technique was used. The performance of this technique in dealing with Southeast Asian typhoons is now examined by considering an ensemble of one simulated typhoon case. This analysis is new insofar as it deals with simulations done in the climate mode (so that any skill of reproducing the typhoon is not related to details of initial conditions), is done in ensemble mode (the same development is described by several simulations), and is done with a spectral nudging constraint (so that the observed large-scale state is enforced in the model domain). This case indicates that tropical storms that are coarsely described by the reanalyses are correctly identified and tracked; considerably deeper core pressure and higher wind speeds are simulated compared to the driving reanalyses. When the regional atmospheric model is run without spectral nudging, significant intraensemble variability occurs; also additional, nonobserved typhoons form. Thus, the insufficiency of lateral boundary conditions alone for determining the details of the dynamic developments in the interior becomes very clear. The same lateral boundary conditions are consistent with different developments in the interior. Several sensitivity experiments were performed concerning varied grid distances, different initial starting dates of the simulations, and changed spectral nudging parameters.
ACCESSION #
32087486

 

Related Articles

  • A Comparison of the Atmospheric Response to ENSO in Coupled and Uncoupled Model Simulations. Jha, Bhaskar; Kumar, Arun // Monthly Weather Review;Jan2009, Vol. 137 Issue 1, p479 

    In the Atmospheric Model Intercomparison Project (AMIP) simulations the sea surface temperatures (SSTs) are specified and the oceanic evolution consistent with air–sea interaction is not included. This omission could lead to errors in the atmospheric response to SSTs. At the same time,...

  • Hovmöller diagrams of climate anomalies in NCEP/NCAR reanalysis from 1948 to 2009. Hocke, Klemens; Kämpfer, Niklaus // Climate Dynamics;Jan2011, Vol. 36 Issue 1/2, p355 

    mospheric and oceanic reanalysis data of the past 60 years are visualized by time-latitude cross sections which inform about temporal and latitudinal variability, changes, and meridional circulation of the climate system on time scales from years to decades. The diagrams ease the understanding...

  • Domain choice in an experimental nested modeling prediction system for South America. Rauscher, S. A.; Seth, A.; Qian, J.-H.; Camargo, S. J. // Theoretical & Applied Climatology;2006, Vol. 86 Issue 1-4, p229 

    The purposes of this paper are to evaluate the new version of the regional model, RegCM3, over South America for two test seasons, and to select a domain for use in an experimental nested prediction system, which incorporates RegCM3 and the European Community-Hamburg (ECHAM) general circulation...

  • Simulation of Indian summer monsoon circulation and rainfall using RegCM3. Dash, S. K.; Shekhar, M. S.; Singh, G. P. // Theoretical & Applied Climatology;2006, Vol. 86 Issue 1-4, p161 

    The Regional Climate Model RegCM3 has been used to examine its suitability in simulating the Indian summer monsoon circulation features and associated rainfall. The model is integrated at 55 km horizontal resolution over a South Asia domain for the period April–September of the years 1993...

  • Climatology and Interannual Variation of the East Asian Winter Monsoon: Results from the 1979--95 NCEP/NCAR Reanalysis. Yi Zhang; Sperber, Kenneth R.; Boyle, James S. // Monthly Weather Review;Oct97, Vol. 125 Issue 10, p2605 

    This paper presents the climatology and interannual variation of the East Asian winter monsoon based on the 1979--95 National Centers for Environmental Prediction/National Center for Atmospheric Research reanalysis. In addition to documenting the frequency, intensity, and preferred propagation...

  • Relationships between the West Asian subtropical westerly jet and summer precipitation in northern Xinjiang. Zhao, Yong; Wang, MinZhong; Huang, AnNing; Li, HongJun; Huo, Wen; Yang, Qing // Theoretical & Applied Climatology;May2014, Vol. 116 Issue 3-4, p403 

    The relation between the spatial and temporal variations of the West Asian subtropical westerly jet (WASWJ) and the summer precipitation in northern Xinjiang has been explored using the NCEP/NCAR reanalysis data and the summer precipitation data at 43 stations in northern Xinjiang during 1961 to...

  • Development of a 50-Year High-Resolution Global Dataset of Meteorological Forcings for Land Surface Modeling. Sheffield, Justin; Goteti, Gopi; Wood, Eric F. // Journal of Climate;Jul2006, Vol. 19 Issue 13, p3088 

    Understanding the variability of the terrestrial hydrologic cycle is central to determining the potential for extreme events and susceptibility to future change. In the absence of long-term, large-scale observations of the components of the hydrologic cycle, modeling can provide consistent...

  • Tropical Precipitation Variability and Convectively Coupled Equatorial Waves on Submonthly Time Scales in Reanalyses and TRMM. Kim, Ji-Eun; Alexander, M. Joan // Journal of Climate;May2013, Vol. 26 Issue 10, p3013 

    Tropical precipitation characteristics are investigated using the Tropical Rainfall Measuring Mission (TRMM) 3-hourly estimates, and the result is compared with five reanalyses including the European Centre for Medium-Range Weather Forecasts (ECMWF) Interim Re-Analysis (ERA-Interim), Modern Era...

  • The Impact of Dropwindsonde Data on Typhoon Track Forecasts in DOTSTAR. Chun-Chieh Wu; Kun-Hsuan Chou; Po-Hsiung Lin; Aberson, Sim D.; Peng, Melinda S.; Nakazawa, Tetsuo // Weather & Forecasting;Dec2007, Vol. 22 Issue 6, p1157 

    Starting from 2003, a new typhoon surveillance program, Dropwindsonde Observations for Typhoon Surveillance near the Taiwan Region (DOTSTAR), was launched. During 2004, 10 missions for eight typhoons were conducted successfully with 155 dropwindsondes deployed. In this study, the impact of these...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

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

Try another library?
Sign out of this library

Other Topics