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Comparison of Dynamically and Statistically Downscaled Seasonal Climate Forecasts for the Cold Season over the United States

Journal Article · · Journal of Geophysical Research: Atmospheres
DOI:https://doi.org/10.1029/2012JD017650· OSTI ID:1708862
 [1];  [1];  [2]
  1. BATTELLE (PACIFIC NW LAB)
  2. University of Oklahoma
+ Show Author Affiliations

This study compares two approaches, dynamical and statistical downscaling, for their potential to improve regional seasonal forecasts for the United States (U.S.) during the cold season. In the MultiRCM Ensemble Downscaling (MRED) project, seven regional climate models (RCMs) are used to dynamically downscale the Climate Forecast System (CFS) seasonal prediction over the conterminous U.S. out to 5 months for the period of 1982–2003. The simulations cover December to April of next year with 10 ensemble members from each RCM with different initial and boundary conditions from the corresponding ensemble members. These dynamically downscaled forecasts are compared with statistically downscaled forecasts produced by two bias correction methods applied to both the CFS and RCM forecasts. Results of the comparison suggest that the RCMs add value in seasonal prediction application, but the improvements largely depend on location, forecast lead time, variables, and skill metrics used for evaluation. Generally, more improvements are found over the Northwest and North Central U.S. for the shorter lead times. The comparison results also suggest a hybrid forecast system that combines both dynamical and statistical downscaling methods have the potential to maximize prediction skill.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC05-76RL01830
OSTI ID:
1708862
Report Number(s):
PNWD-SA-9747
Journal Information:
Journal of Geophysical Research: Atmospheres, Journal Name: Journal of Geophysical Research: Atmospheres Journal Issue: D21 Vol. 117
Country of Publication:
United States
Language:
English

References (40)

The NCEP Climate Forecast System journal August 2006
Simulations of the ENSO Hydroclimate Signals in the Pacific Northwest Columbia River Basin journal November 1999
Evaluation of Hydrologically Relevant PCM Climate Variables and Large-Scale Variability over the Continental U.S. journal January 2004
U.S. regional climate simulations and seasonal forecasts journal January 2003
Monitoring and predicting the 2007 U.S. drought journal January 2007
Regional Climate Model Simulation of U.S.–Mexico Summer Precipitation Using the Optimal Ensemble of Two Cumulus Parameterizations journal October 2007
Forecast Calibration and Combination: A Simple Bayesian Approach for ENSO journal April 2004
A Long-Term Hydrologically Based Dataset of Land Surface Fluxes and States for the Conterminous United States* journal November 2002
Dynamic-Model-Based Seasonal Prediction of Meteorological Drought over the Contiguous United States journal April 2012
Developments in Operational Long-Range Climate Prediction at CPC journal June 2008
An Alternative Mass Flux Profile in the Kain–Fritsch Convective Parameterization and Its Effects in Seasonal Precipitation journal October 2007
Regional Climate Models Add Value to Global Model Data: A Review and Selected Examples journal September 2011
Research Needs and Directions of Regional Climate Modeling Using WRF and CCSM journal December 2006
Investigation of the Summer Climate of the Contiguous United States and Mexico Using the Regional Atmospheric Modeling System (RAMS). Part II: Model Climate Variability journal August 2007
Mid-Century Ensemble Regional Climate Change Scenarios for the Western United States journal January 2004
NCEP - ECPC monthly to seasonal US fire danger forecasts journal January 2010
Land surface impacts on subseasonal and seasonal predictability: LAND IMPACTS SUBSEASONAL PREDICTABILITY journal December 2011
A two-layer model of soil hydrology journal May 1984
An Improved Coupled Model for ENSO Prediction and Implications for Ocean Initialization. Part I: The Ocean Data Assimilation System journal April 1998
Hydrologic Implications of Dynamical and Statistical Approaches to Downscaling Climate Model Outputs journal January 2004
NCEP–DOE AMIP-II Reanalysis (R-2) journal November 2002
A Unified Modeling Approach to Climate System Prediction journal December 2009
Assessment of Dynamic Downscaling of the Continental U.S. Regional Climate Using the Eta/SSiB Regional Climate Model journal August 2007
Assessing the dynamic-downscaling ability over South America using the intensity-scale verification technique journal April 2010
An Assessment of the CFS Real-Time Seasonal Forecasts journal June 2010
Evaluating the performance and utility of regional climate models: the PRUDENCE project journal March 2007
Bayesian merging of multiple climate model forecasts for seasonal hydrological predictions: BAYESIAN SEASONAL HYDROLOGIC PREDICTIONS journal May 2007
Downscaling general circulation model output: a review of methods and limitations journal December 1997
Hydroclimate of the Western United States Based on Observations and Regional Climate Simulation of 1981–2000. Part II: Mesoscale ENSO Anomalies journal June 2003
ENSEMBLES: A new multi-model ensemble for seasonal-to-annual predictions—Skill and progress beyond DEMETER in forecasting tropical Pacific SSTs journal January 2009
A Regional Climate Change Assessment Program for North America journal September 2009
Improving cold season precipitation prediction by the nested CWRF-CFS system: IMPROVING PRECIPITATION PREDICTION BY CWRF journal January 2011
Hydroclimate of the Western United States Based on Observations and Regional Climate Simulation of 1981–2000. Part I: Seasonal Statistics journal June 2003
North American Regional Reanalysis journal March 2006
Dynamical downscaling: Assessment of value retained and added using the Regional Atmospheric Modeling System (RAMS) journal January 2005
Long-range experimental hydrologic forecasting for the eastern United States journal January 2002
Assessing the idealized predictability of precipitation and temperature in the NCEP Climate Forecast System journal January 2006
The Added Value Index: A new metric to quantify the added value of regional models journal January 2011
The NCEP Climate Forecast System Reanalysis journal August 2010
The NCEP Regional Spectral Model: An Update journal October 1997

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Related Subjects

Comparison
cold season
downscaled
seasonal
climate
forecasts
U.S.
dynamic
statistical
methods