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California reanalysis downscaling at 10 km using an ocean-atmosphere coupled regional model system

Title: California reanalysis downscaling at 10 km using an ocean-atmosphere coupled regional model system.
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Name(s): Li, Haiqin, author
Kanamitsu, Masao, author
Hong, Song-You, author
Type of Resource: text
Genre: Text
Issuance: serial
Date Issued: 2012
Physical Form: computer
online resource
Extent: 1 online resource
Language(s): English
Abstract/Description: A fully coupled regional downscaling system for both the Regional Spectral Model (RSM) for atmosphere and the Regional Ocean Modeling System (ROMS) for the ocean was developed for the purpose of downscaling observed analysis or global model outputs. The two models share the same grid and resolution with efficient parallelization through the use of dual message passing interfaces. Coupled downscaling was performed using historical Simple Ocean Data Assimilation (SODA) oceanic reanalysis and NCEP/DOE (R-2) atmospheric reanalysis in order to study the impact of coupling on the regional scale atmospheric analysis. The results were subsequently compared with the uncoupled downscaling forced by the prescribed observed sea surface temperature (SST). An evaluation of the SST and ocean current from the coupled experiment yielded realistic small-scale oceanic features that are nearly absent in the oceanic reanalysis. Upwelling over the California coast is well resolved and comparable to findings obtained from high-resolution observations. The coupling impact on the atmospheric circulation mainly modulates the near surface atmospheric variables when compared to the simulation conducted without coupling. The duration of the Catalina Eddy detected in the coupled experiment increased by about 6.5% when compared to that in the uncoupled experiment. The offshore land breeze is enhanced by about 10%, whereas the change in the onshore sea breeze is very small during the summer.
Identifier: FSU_migr_coaps_pubs-0059 (IID), 10.1029/2011JD017372 (DOI)
Keywords: Regional climate, climate change, coupled model, reanalysis, upwelling, regional ocean model
Note: Published in The Journal of Geophysical Research, Vol. 117, D12118, 16 pp., 2012, doi:10.1029/2011JD017372
Citation: Li, H., M. Kanamitsu, and S.-Y. Hong (2012), California reanalysis downscaling at 10 km using an ocean-atmosphere coupled regional model system, J. Geophys. Res., 117, D12118, doi:10.1029/2011JD017372.
Subject(s): Atmospheric sciences
Meteorology
Oceanography
Links: http://coaps.fsu.edu/bibliography/papers/bastola/2012jawra.pdf
Persistent Link to This Record: http://purl.flvc.org/fsu/fd/FSU_migr_coaps_pubs-0059
Host Institution: FSU
Is Part of Series: COAPS Publications.
Is Part Of: Hydrological Processes.

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Li, H., Kanamitsu, M., & Hong, S. -Y. (2012). California reanalysis downscaling at 10 km using an ocean-atmosphere coupled regional model system. Hydrological Processes. Retrieved from http://coaps.fsu.edu/bibliography/papers/bastola/2012jawra.pdf