RT Journal Article
T1 Wind kinetic energy climatology and effective resolution for the ERA5 reanalysis
A1 Bolgiani, Pedro
A1 Calvo Sancho, C.
A1 Díaz Fernández, Javier
A1 Quitián Hernández, Lara
A1 Santos Muñoz, D.
A1 Farrán, J. I.
A1 González Alemán, Juan Jesús
A1 Valero Rodríguez, Francisco
A1 Martín, M. L.
A1 Sastre Marugán, Mariano
AB ERA5 represents the state of the art for atmospheric reanalyses and is widely used in meteorological and climatological research. In this work, this dataset is evaluated using the wind kinetic energy spectrum. Seasonal climatologies are generated for 30 degrees latitudinal bands in the Northern Hemisphere (periodic domain) and over the North Atlantic area (limited-area domain). The spectra are also assessed to determine the effective resolution of the reanalysis. The results present notable differences between the latitudinal domains, indicating that ERA5 is properly capturing the synoptic conditions. The seasonal variability is adequate too, being winter the most energetic, and summer the least energetic season. The limited area domain results introduce a larger energy density and range. Despite the good results for the synoptic scales, the reanalysis' spectra are not able to properly reproduce the dissipation rates at mesoscale. This is a source of uncertainties which needs to be taken into account when using the dataset. Finally, a cyclone tropical transition is presented as a case study. The spectrum generated shows a clear difference in energy density at every wavelength, as expected for a highly-energetic status of the atmosphere.
PB Springer Nature
SN 0930-7575
YR 2022
FD 2022-01-29
LK https://hdl.handle.net/20.500.14352/71691
UL https://hdl.handle.net/20.500.14352/71691
LA eng
NO CRUE-CSIC (Acuerdos Transformativos 2022)Open Access funding provided thanks to the CRUE-CSIC agreement with Springer Nature. This work is supported by the Interdisciplinary Mathematics Institute of the Complutense University of Madrid and funded by the Spanish Ministry of Economy under the following research projects: PID2019-105306RB-I00 (IBER-CANES), CGL2016-78702 (SAFEFLIGHT), PCIN-2016-080 and FEI-EU-17-16. This work is also supported by the ECMWF Special Projects SPESMART and SPESVALE.
NO Ministerio de Economía y Competitividad (MINECO)
NO ECMWF Special Project SPESMART
NO ECMWF Special Project SPESVALE
NO Interdisciplinary Mathematics Institute of the Complutense University of Madrid
DS Docta Complutense
RD 10 abr 2025