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dc.contributor.authorSchiemann, Reinhard
dc.contributor.authorAthanasiadis, Panos
dc.contributor.authorBarriopedro, David
dc.contributor.authorDoblas-Reyes, Francisco
dc.contributor.authorLohmann, Katja
dc.contributor.authorRoberts, Malcolm J.
dc.contributor.authorSein, Dmitry V.
dc.contributor.authorRoberts, Christopher D.
dc.contributor.authorTerray, Laurent
dc.contributor.authorVidale, Pier Luigi
dc.contributor.otherBarcelona Supercomputing Center
dc.date.accessioned2020-06-29T10:38:02Z
dc.date.available2020-06-29T10:38:02Z
dc.date.issued2020
dc.identifier.citationSchiemann, R. [et al.]. Northern Hemisphere blocking simulation in current climate models: evaluating progress from the Climate Model Intercomparison Project Phase 5 to 6 and sensitivity to resolution. "Weather Climate Dynamics", 2020, vol. 1, núm. 1, p. 277-292.
dc.identifier.issn2698-4016
dc.identifier.urihttp://hdl.handle.net/2117/191889
dc.description.abstractGlobal climate models (GCMs) are known to suffer from biases in the simulation of atmospheric blocking, and this study provides an assessment of how blocking is represented by the latest generation of GCMs. It is evaluated (i) how historical CMIP6 (Climate Model Intercomparison Project Phase 6) simulations perform compared to CMIP5 simulations and (ii) how horizontal model resolution affects the simulation of blocking in the CMIP6-HighResMIP (PRIMAVERA – PRocess-based climate sIMulation: AdVances in high-resolution modelling and European climate Risk Assessment) model ensemble, which is designed to address this type of question. Two blocking indices are used to evaluate the simulated mean blocking frequency and blocking persistence for the Euro-Atlantic and Pacific regions in winter and summer against the corresponding estimates from atmospheric reanalysis data. There is robust evidence that CMIP6 models simulate blocking frequency and persistence better than CMIP5 models in the Atlantic and Pacific and during winter and summer. This improvement is sizeable so that, for example, winter blocking frequency in the median CMIP5 model in a large Euro-Atlantic domain is underestimated by 33 % using the absolute geopotential height (AGP) blocking index, whereas the same number is 18 % for the median CMIP6 model. As for the sensitivity of simulated blocking to resolution, it is found that the resolution increase, from typically 100 to 20 km grid spacing, in most of the PRIMAVERA models, which are not re-tuned at the higher resolutions, benefits the mean blocking frequency in the Atlantic in winter and summer and in the Pacific in summer. Simulated blocking persistence, however, is not seen to improve with resolution. Our results are consistent with previous studies suggesting that resolution is one of a number of interacting factors necessary for an adequate simulation of blocking in GCMs. The improvements reported in this study hold promise for further reductions in blocking biases as model development continues.
dc.description.sponsorshipThis research has been supported by the European Commission (PRIMAVERA (grant no. 641727)), the Spanish government (PALEOSTRAT (grant no. CGL2015-69699-R) and JEDiS (grant no. RTI2018-096402-B-I00)), and the Ministry of Science and Higher Education of Russia (grant no. 0149-2019-0015).
dc.format.extent16 p.
dc.language.isoeng
dc.publisherCopernicus Publications
dc.relation.urihttps://wcd.copernicus.org/articles/1/277/2020/wcd-1-277-2020-supplement.pdf
dc.rightsAttribution 3.0 Spain
dc.rightsAttribution 4.0 International (CC BY 4.0)
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/es/
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectÀrees temàtiques de la UPC::Desenvolupament humà i sostenible::Política i gestió ambiental
dc.subject.lcshComputer simulation
dc.subject.lcshNorthern Hemisphere
dc.subject.lcshHigh pressure systems (Meteorology)
dc.subject.otherClimate models
dc.subject.otherBlocking simulation
dc.subject.otherClimate extremes
dc.subject.otherGlobal climate models (GCMs)
dc.subject.otherAtmospheric blocking
dc.subject.otherCMIP6 (Climate Model Intercomparison Project Phase 6)
dc.subject.otherCMIP5 (Climate Model Intercomparison Project Phase 5)
dc.subject.otherPRIMAVERA – PRocess-based climate sIMulation: AdVances in high-resolution modelling and European climate Risk Assessment
dc.titleNorthern Hemisphere blocking simulation in current climate models: evaluating progress from the Climate Model Intercomparison Project Phase 5 to 6 and sensitivity to resolution
dc.typeArticle
dc.subject.lemacSimulació per ordinador
dc.subject.lemacAtmosfera -- Models matemàtics
dc.identifier.doi10.5194/wcd-1-277-2020
dc.description.peerreviewedPeer Reviewed
dc.relation.publisherversionhttps://wcd.copernicus.org/articles/1/277/2020/
dc.rights.accessOpen Access
dc.description.versionPostprint (published version)
dc.relation.projectidinfo:eu-repo/grantAgreement/EC/H2020/641727/EU/PRocess-based climate sIMulation: AdVances in high resolution modelling and European climate Risk Assessment/PRIMAVERA
local.citation.publicationNameWeather Climate Dynamics
local.citation.volume1
local.citation.number1
local.citation.startingPage277
local.citation.endingPage292
dc.relation.datasethttps://apps.ecmwf.int/datasets/


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Attribution 3.0 Spain
Except where otherwise noted, content on this work is licensed under a Creative Commons license : Attribution 3.0 Spain