Spurious shifts in the pattern of diurnal variation of sea level pressure of reanalysis datasets

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorSugahara, Shigetoshi
dc.creatorda Rocha, Rosmeri Porfirio
dc.creatorYnoue, Rita Yuri
dc.creatorda Silveira, Reinaldo Bomfim
dc.date2014-05-27T11:27:26Z
dc.date2016-10-25T18:40:45Z
dc.date2014-05-27T11:27:26Z
dc.date2016-10-25T18:40:45Z
dc.date2013-01-01
dc.date.accessioned2017-04-06T02:06:31Z
dc.date.available2017-04-06T02:06:31Z
dc.identifierClimate Dynamics, v. 40, n. 1-2, p. 175-186, 2013.
dc.identifier0930-7575
dc.identifier1432-0894
dc.identifierhttp://hdl.handle.net/11449/74107
dc.identifierhttp://acervodigital.unesp.br/handle/11449/74107
dc.identifier10.1007/s00382-012-1338-8
dc.identifierWOS:000313033100011
dc.identifier2-s2.0-84871925166
dc.identifierhttp://dx.doi.org/10.1007/s00382-012-1338-8
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/894880
dc.descriptionThe main purpose of this work is to report the presence of spurious discontinuities in the pattern of diurnal variation of sea level pressure of the three reanalysis datasets from: the National Centers for Environmental Prediction (NCEP) and National Center for Atmospheric Science (R1), the NCEP and Department of Energy (R2), and the European Centre for Medium Range Weather Forecasting (ERA-40). Such discontinuities can be connected to the major changes in the global observing system that have occurred throughout reanalyses years. In the R1, the richest period in discontinuities is 1956-1958, coinciding with the start of modern radiosonde observation network. Rapid increase in the density of surface-based observations from 1967 also had an important impact on both R1 and ERA-40, with larger impact on R1. The reanalyses show discontinuities in the 1970s related to the assimilation of radiances measured by the Vertical Temperature Profile Radiometer and TIROS-N Operational Vertical Sounders onboard satellites. In the ERA-40, which additionally assimilated Special Sensor Microwave/Imager data, there are discontinuities in 1987-1989. The R1 also presents further discontinuities, in 1988-1993 likely connected to replacement/introduction of NOAA-series satellites with different biases, and to the volcanic eruption of Mount Pinatubo in June 1991, which is known to have severely affected measurements of infrared radiances for several years. The discontinuities in 1996-1998 might be partially connected to change in the type of radiosonde, from VIZ-B to VIZ-B2. The R2, which covers only satellite era (1979-on), shows discontinuities mainly in 1992, 1996-1997, and 2001. The discontinuities in 1992 and 2001 might have been caused by change in the satellite measurements and those in 1996-1997 by some changes in land-based observations network. © 2012 Springer-Verlag.
dc.languageeng
dc.relationClimate Dynamics
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectDiurnal variation of sea level pressure
dc.subjectECMWF ERA-40
dc.subjectNCEP/DOE reanalysis 2
dc.subjectNCEP/NCAR reanalysis 1
dc.subjectObservation systems
dc.subjectSpurious shifts
dc.subjectdata assimilation
dc.subjectdata set
dc.subjectdiurnal variation
dc.subjectradiosonde
dc.subjectsatellite data
dc.subjectsatellite imagery
dc.subjectsea level pressure
dc.subjectSSM-I
dc.subjectPinatubo
dc.titleSpurious shifts in the pattern of diurnal variation of sea level pressure of reanalysis datasets
dc.typeOtro


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