The ERA-Interim reanalysis: configuration and performance of the data assimilation system

Autor(en)

Leopold Haimberger, Christina Tavolato

Abstrakt

ERA-Interim is the latest global atmospheric reanalysis produced by the European Centre for Medium-Range Weather Forecasts (ECMWF). The ERA-Interim project was conducted in part to prepare for a new atmospheric reanalysis to replace ERA-40, which will extend back to the early part of the twentieth century. This article describes the forecast model, data assimilation method, and input datasets used to produce ERA-Interim, and discusses the performance of the system. Special emphasis is placed on various difficulties encountered in the production of ERA-40, including the representation of the hydrological cycle, the quality of the stratospheric circulation, and the consistency in time of the reanalysed fields. We provide evidence for substantial improvements in each of these aspects. We also identify areas where further work is needed and describe opportunities and objectives for future reanalysis projects at ECMWF

Organisation(en)

Institut für Meteorologie und Geophysik

Journal

Quarterly Journal of the Royal Meteorological Society: a journal of the atmospheric sciences, applied meteorology, and physical oceanography

Band

137

Seiten

553-597

Anzahl der Seiten

45

ISSN

0035-9009

DOI

https://doi.org/10.1002/qj.828

Publikationsdatum

2011

Peer-reviewed

Ja

ÖFOS 2012

105206 Meteorologie

Link zum Portal

https://ucris.univie.ac.at/portal/de/publications/the-erainterim-reanalysis-configuration-and-performance-of-the-data-assimilation-system(a253756b-8d13-4bf9-9d8a-1b75b7e635e8).html