Please use this identifier to cite or link to this item:
Title: Comparative energetics of ERA-40, JRA-25 and NCEP-R2 reanalysis, in the wave number domain
Author: Marques, C. A. F.
Rocha, A.
Corte-Real, J.
Keywords: Atmospheric energetics
Wave number
Issue Date: 2010
Publisher: Elsevier
Abstract: TheEuropeanCentreforMedium-RangeWeatherForecasts40-year Reanalysis (ERA-40), the Japan Meteorological Agency and Central Research Institute of Electric Power Industry 25-year Reanalysis (JRA-25), and the National Centers for Environmental Prediction andDepartmentofEnergyAMIP-IIReanalysis(NCEP-R2)areintercompared through a global energetics analysis for all seasons. Overall, the Lorenz energy cycle is consistent among the three datasets. The flow of energy and the peaks and slopes in the spectra of the various components agree between the three reanalysis. Additionally, the temporal variability of the energy cycle terms shows consistency between the three reanalysis. Most differences between the three reanalysis are related to the magnitudes of energy forms and energy conversion/transfer rates at each wave number, generally following the relation ERA−40 > JRA−25 > NCEP−R2, and mainly located in the Southern Hemisphere. The best agreement between the three datasets is found for northern winter. Differences between the three datasets are greater for the otherseasons,beinggreatestfornorthernsummer.Ingeneral,these discrepancies are fairly modest, being likely due to the different model biases and resolutions, and the different data assimilation methods used by the respective reanalysis systems. The energetics of the three reanalysis become closer to each other in more recent years, which is likely due to the increase in the number of observations assimilated in the reanalysis.
Peer review: yes
DOI: 10.1016/j.dynatmoce.2010.03.003
ISSN: 0377-0265
Appears in Collections:CESAM - Artigos
DFis - Artigos

Files in This Item:
File Description SizeFormat 
Marques et al. - 2010 - Comparative energetics of ERA-40, JRA-25 and NCEP-.pdf3.54 MBAdobe PDFrestrictedAccess

Formato BibTex MendeleyEndnote Degois 

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.