Application of Scale-Selective Data Assimilation to Regional Climate Modeling and Prediction

Shiqiu Peng; Lian Xie; Bin Liu; Semazzi, Fredrick
April 2010
Monthly Weather Review;Apr2010, Vol. 138 Issue 4, p1307
Academic Journal
A method referred to as scale-selective data assimilation (SSDA) is designed to inject the large-scale components of the atmospheric circulation from a global model into a regional model to improve regional climate simulations and predictions. The SSDA is implemented through the following procedure: 1) using a low-pass filter to extract the large-scale components of the atmospheric circulation from global analysis or model forecasts; 2) applying the filter to extract the regional-scale and the large-scale components of the atmospheric circulation from the regional model simulations or forecasts; 3) assimilating the large-scale circulation obtained from the global model into the corresponding component simulated by the regional model using the method of three-dimensional variational data assimilation (3DVAR) while maintaining the small-scale components from the regional model during the assimilation cycle; 4) combining the small-scale and the assimilated large-scale components as the adjusted forecasts by the regional climate model and allowing the two components to mutually adjust outside the data assimilation cycle. A case study of summer 2005 seasonal climate hindcasting for the regions of the Atlantic and the eastern United States indicates that the large-scale components from the Global Forecast System (GFS) analysis can be effectively assimilated into the regional model using the scale-selective data assimilation method devised in this study, resulting in an improvement in the overall results from the regional climate model.


Related Articles

  • ENSO-independent contemporaneous variations of anomalous circulations in the Northern and Southern Hemispheres: The polar-tropical seesaw mode. Tang, Weiya; Guan, Zhaoyong // Journal of Meteorological Research;Dec2015, Vol. 29 Issue 6, p917 

    Using the NCEP/NCAR reanalysis and the ENSO indices from the Climate Prediction Center over the period 1978-2014, we have investigated the contemporaneous circulation variations in the Northern and Southern Hemispheres by performing the singular value decomposition analysis of sea level pressure...

  • Global Climatological Features in a Simulation Using the CPTEC–COLA AGCM. Cavalcanti, Iracema F. A.; Marengo, José A.; Satyamurty, Prakki; Nobre, Carlos A.; Trosnikov, Igor; Bonatti, José Paulo; Manzi, Antonio Ocimar; Tarasova, Tatiana; Pezzi, Luciano P.; D'Almeida, Cassiano; Sampaio, Gilvan; Castro, Christopher C.; Sanches, Marcos B.; Camargo, Hélio // Journal of Climate;Nov2002, Vol. 15 Issue 21, p2965 

    The Center for Weather Forcasting and Climate Studies-Center for Ocean-Land-Atmosphere Studies (CPTECCOLA) atmospheric general circulation model (AGCM) is integrated with nine initial conditions for 10 yr to obtain the model climate in an ensemble mode. The global climatological characteristics...

  • Forecast of Operational Forecast Skill with the Adjoint of a Primitive Equation Model. Bouteloup, Yves // Monthly Weather Review;Nov97, Vol. 125 Issue 11, p2984 

    In this article the author demonstrates the feasibility of a local skill forecast system based on the use of the adjoint of the tangent linear equations. A six-level adiabatic primitive equations spectral model of the atmospheric circulation, truncated at T42, is used. Local skill forecast...

  • Principal modes of atmospheric circulation anomalies associated with global angular momentum... Kang, In-Sik; Lau, K.-M. // Journal of the Atmospheric Sciences;5/1/94, Vol. 51 Issue 9, p1194 

    Describes the variability of global atmospheric angular momentum (GAM) and its relationship with principal modes of three-dimensional atmospheric circulation anomalies. Data from the European Centre for Medium-Range Weather Forecasts; Identified semiannual component in the troposphere; Modes of...

  • Regeneration of the Southerly Buster of Southeast Australia. Reid, Helen J. // Weather & Forecasting;Aug2000, Vol. 15 Issue 4, p432 

    The southerly buster has been successfully simulated using a numerical weather prediction (NWP) model and verified (particularly the sea level pressure field). This simulation was then used to study the behavior of the southerly buster in the region of the Hunter Valley, New South Wales,...

  • Weather Watch.  // High Plains Journal;6/23/2014, Vol. 132 Issue 25, p14B 

    The article offers weather updates from June 21-27, 2014 in the U.S. which include the temperature, precipitation and the national jet stream map.

  • Analysis and Reduction of Systematic Errors through a Seamless Approach to Modeling Weather and Climate. Martin, G. M.; Milton, S. F.; Senior, C. A.; Brooks, M. E.; Ineson, S.; Reichler, T.; Kim, J. // Journal of Climate;Nov2010, Vol. 23 Issue 22, p5933 

    The reduction of systematic errors is a continuing challenge for model development. Feedbacks and compensating errors in climate models often make finding the source of a systematic error difficult. In this paper, it is shown how model development can benefit from the use of the same model...

  • An Extended Solar Cycle 23 with Deep Minimum Transition to Cycle 24: Assessments and Climatic Ramifications. Agee, Ernest M.; Cornett, Emily; Gleason, Kandace // Journal of Climate;Nov2010, Vol. 23 Issue 22, p6110 

    The extended length of solar cycle 23 and the associated deep quiet period (QP) between cycles 23 and 24 have been examined using the international sunspot record from 1755 to 2010. This study has also introduced a QP definition based on a (beginning and ending) mean monthly threshold value of...

  • A hydrological onset and withdrawal index for the West African monsoon. Dalu, G. A.; Gaetani, M.; Baldi, M. // Theoretical & Applied Climatology;2009, Vol. 96 Issue 1/2, p179 

    We have developed a hydrological prognostic index, HOWI (hydrological onset and withdrawal index), for the onset and the withdrawal of the West African monsoon (WAM), based on the vertically integrated moisture transport ( VIMT). The regions of West Africa with the same climatological onset...


Read the Article


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

Try another library?
Sign out of this library

Other Topics