An analysis of the Galveston Hurricane using the 20CR data set


Autoria(s): Neff, Basil; Kummerli, Claudio; Stickler, Alexander; Franke, Jörg; Brönnimann, Stefan
Contribuinte(s)

Brönnimann, Stefan

Martius, Olivia

Data(s)

2013

Resumo

The Twentieth Century Reanalysis (20CR) is an atmospheric dataset consisting of 56 ensemble members, which covers the entire globe and reaches back to 1871. To assess the suitability of this dataset for studying past extremes, we analysed a prominent extreme event, namely the Galveston Hurricane, which made landfall in September 1900 in Texas, USA. The ensemble mean of 20CR shows a track of the pressure minimum with a small standard deviation among the 56 ensemble members in the area of the Gulf of Mexico. However, there are systematic differences between the assimilated “Best Track” from the International Best Track Archive for Climate Stewardship (IBTrACS) and the ensemble mean track in 20CR. East of the Strait of Florida, the tracks derived from 20CR are located systematically northeast of the assimilated track while in the Gulf of Mexico, the 20CR tracks are systematically shifted to the southwest compared to the IBTrACS position. The hurricane can also be observed in the wind field, which shows a cyclonic rotation and a relatively calm zone in the centre of the hurricane. The 20CR data reproduce the pressure gradient and cyclonic wind field. Regarding the amplitude of the wind speeds, the ensemble mean values from 20CR are significantly lower than the wind speeds known from measurements.

Formato

application/pdf

Identificador

http://boris.unibe.ch/38957/1/GB2013_G89_03.pdf

Neff, Basil; Kummerli, Claudio; Stickler, Alexander; Franke, Jörg; Brönnimann, Stefan (2013). An analysis of the Galveston Hurricane using the 20CR data set. In: Brönnimann, Stefan; Martius, Olivia (eds.) Weather extremes during the past 140 years. Grundlagenforschung: Vol. 89 (pp. 27-34). Bern: Geographica Bernensia 10.4480/GB2013.G89.03 <http://dx.doi.org/10.4480/GB2013.G89.03>

doi:10.7892/boris.38957

info:doi:10.4480/GB2013.G89.03

Idioma(s)

eng

Publicador

Geographica Bernensia

Relação

http://boris.unibe.ch/38957/

http://www.geography.unibe.ch/content/geographica_bernensia/online/gb2013g8903/index_ger.html

Direitos

info:eu-repo/semantics/openAccess

Fonte

Neff, Basil; Kummerli, Claudio; Stickler, Alexander; Franke, Jörg; Brönnimann, Stefan (2013). An analysis of the Galveston Hurricane using the 20CR data set. In: Brönnimann, Stefan; Martius, Olivia (eds.) Weather extremes during the past 140 years. Grundlagenforschung: Vol. 89 (pp. 27-34). Bern: Geographica Bernensia 10.4480/GB2013.G89.03 <http://dx.doi.org/10.4480/GB2013.G89.03>

Palavras-Chave #550 Earth sciences & geology #910 Geography & travel #500 Science
Tipo

info:eu-repo/semantics/bookPart

info:eu-repo/semantics/publishedVersion

PeerReviewed