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Northern Hemisphere winter midlatitude atmospheric variability in CMIP5 models

TitleNorthern Hemisphere winter midlatitude atmospheric variability in CMIP5 models
Publication TypeArticolo su Rivista peer-reviewed
Year of Publication2014
AuthorsDi Biagio, V., Calmanti Sandro, Dell'Aquila Alessandro, and Ruti P.M.
JournalGeophysical Research Letters
Volume41
Pagination1277-1282
ISSN00948276
Keywordsaltitude, Atmospheric circulation, atmospheric modeling, Atmospheric variability, Climate models, CMIP5, Computer simulation, Coupled Model Intercomparison Project, Earth atmosphere, eddy, Fundamental properties, latitude, mid-latitude, Northern Hemisphere, numerical model, planetary wave, Spatial and temporal scale, spatiotemporal analysis, Validation, wave energy, Wave energy conversion
Abstract

The Northern Hemisphere midlatitude winter atmospheric variability simulated by Coupled Model Intercomparison Project phase 5 (CMIP5) models is analyzed at spatial and temporal scales corresponding to the growth of baroclinic eddies and planetary waves. We use a global scalar metric of the wave energy frequency-wave number spectrum to identify potential improvements of the CMIP5 ensemble compared to previous coordinated model simulations (CMIP3). We also evaluate whether CMIP5 models predict future shifts in the global baroclinic eddies and planetary-scale wave activities. With respect to CMIP3, no significant improvements are found, thereby suggesting that no significant breakthrough in the modeling of the climate system has been hit over the last few years. No significant changes are found in RCP4.5 scenarios for the selected metric of the baroclinic and planetary-scale atmospheric flows, thus indicating that localized changes with potential societal impact might not be related to changes in key fundamental properties of the atmospheric circulation. Key Points Performance of CMIP5 in describing global statistics of the atmosphere Biases larger than 20% in most cases No change in the statistics of the baroclinic and planetary scale motions ©2014. American Geophysical Union. All Rights Reserved.

Notes

cited By 3

URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-84894286020&doi=10.1002%2f2013GL058928&partnerID=40&md5=1bd779e67eece63fddfdedde859289e2
DOI10.1002/2013GL058928
Citation KeyDiBiagio20141277