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Dynamic downscaling of the North American Monsoon with the NCEP-Scripps Regional Spectral Model from the NCEP CFS global model

Title: Dynamic downscaling of the North American Monsoon with the NCEP-Scripps Regional Spectral Model from the NCEP CFS global model.
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Name(s): Chan, Steven, author
Misra, Vasubandhu, author
Type of Resource: text
Genre: Text
Issuance: serial
Date Issued: 2011
Physical Form: computer
online resource
Extent: 1 online resource
Language(s): English
Abstract/Description: The June-September (JJAS) 2000-2007 NCEP coupled Climate Forecasting System (CFS) global hindcasts are downscaled over the North and South American continents with the NCEP-Scripps Regional Spectral Model (RSM) with anomaly nesting (AN) and without bias correction (control). A diagnosis of the North American Monsoon (NAM) in CFS and RSM hindcasts is presented here. RSM reduces errors caused by coarse resolution, but is unable to address larger scale CFS errors even with bias correction. CFS has relatively weak Great Plains and Gulf of California low-level jets. Low-level jets are strengthened from downscaling, especially after AN bias correction. The RSM NAM hydroclimate shares similar flaws with CFS with problematic diurnal and seasonal variability. Flaws in both diurnal and monthly variability are forced by erroneous convection-forced divergence outside the monsoon core region in eastern and southern Mexico. NCEP Reanalysis shows significant seasonal variability errors, and AN shows little improvement in regional scale flow errors. Our results suggest extreme caution must be taken when the correction is applied relative to reanalyses. Analysis also shows North American Regional Reanalysis NAM seasonal variability has benefited from precipitation data assimilation, but many questions remain concerning NARR's representation of NAM.
Identifier: FSU_migr_coaps_pubs-0030 (IID), 10.1175/2010JCLI3593.1 (DOI)
Keywords: Monsoons, Anomalies, Spectral analysis/models/distribution, Regional models, Seasonal variability
Note: © Copyright [2011] American Meteorological Society.
Citation: Chan, S. C., and V. Misra (2011), Dynamic downscaling of the North American Monsoon with the NCEP-Scripps Regional Spectral Model from the NCEP CFS global model, J. Climate, doi:10.1175/2010JCLI3593.1.
Subject(s): Atmospheric sciences
Meteorology
Oceanography
Persistent Link to This Record: http://purl.flvc.org/fsu/fd/FSU_migr_coaps_pubs-0030
Owner Institution: FSU
Is Part of Series: COAPS Publications.
Is Part Of: Journal of Climate.

Choose the citation style.
Chan, S., & Misra, V. (2011). Dynamic downscaling of the North American Monsoon with the NCEP-Scripps Regional Spectral Model from the NCEP CFS global model. Journal Of Climate. Retrieved from http://purl.flvc.org/fsu/fd/FSU_migr_coaps_pubs-0030