A
Alexander Haefele
Researcher at MeteoSwiss
Publications - 94
Citations - 1262
Alexander Haefele is an academic researcher from MeteoSwiss. The author has contributed to research in topics: Lidar & Microwave radiometer. The author has an hindex of 19, co-authored 76 publications receiving 979 citations. Previous affiliations of Alexander Haefele include University of Bern & University of Western Ontario.
Papers
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Journal ArticleDOI
Determination and climatology of the planetary boundary layer height above the Swiss plateau by in situ and remote sensing measurements as well as by the COSMO-2 model
M. Collaud Coen,C. Praz,C. Praz,Alexander Haefele,Dominique Ruffieux,P. Kaufmann,Bertrand Calpini +6 more
TL;DR: In this paper, an operational PBL height detection method including several remote sensing instruments (wind profiler, Raman lidar, microwave radiometer) and several algorithms (Parcel and bulk Richardson number methods, surface-based temperature inversion, aerosol or humidity gradient analysis) was developed and tested with 1 year of measurements, which allows the methods to be validated against radio sounding measurements.
Journal ArticleDOI
Ozone depletion, water vapor increase, and PSC generation at midlatitudes by the 2008 major stratospheric warming
Thomas Flury,Klemens Hocke,Klemens Hocke,Alexander Haefele,Niklaus Kämpfer,Niklaus Kämpfer,Ralph Lehmann +6 more
TL;DR: The ground-based microwave radiometers GROMOS and MIAWARA at Bern (Switzerland) continuously measure ozone and water vapor profiles from 20 to 70 km altitude as mentioned in this paper.
Journal ArticleDOI
The unprecedented 2017–2018 stratospheric smoke event: decay phase and aerosol properties observed with the EARLINET
Holger Baars,Albert Ansmann,Kevin Ohneiser,Moritz Haarig,Ronny Engelmann,Dietrich Althausen,Ingrid Hanssen,Michael Gausa,Aleksander Pietruczuk,Artur Szkop,Iwona S. Stachlewska,Dongxiang Wang,Jens Reichardt,Annett Skupin,Ina Mattis,Thomas Trickl,Hannes Vogelmann,Francisco Navas-Guzmán,Alexander Haefele,Karen Acheson,Albert A. Ruth,Boyan Tatarov,Detlef Müller,Qiaoyun Hu,Thierry Podvin,Philippe Goloub,Igor Veselovskii,Christophe Pietras,Martial Haeffelin,Patrick Fréville,Michaël Sicard,Adolfo Comerón,Alfonso Javier Fernández García,Francisco Molero Menéndez,Carmen Córdoba-Jabonero,Juan Luis Guerrero-Rascado,Lucas Alados-Arboledas,Daniele Bortoli,Maria João Costa,Davide Dionisi,G. L. Liberti,Xuan Wang,Alessia Sannino,Nikolaos Papagiannopoulos,Antonella Boselli,Lucia Mona,Giuseppe D'Amico,Salvatore Romano,Maria Rita Perrone,Livio Belegante,Doina Nicolae,Ivan Grigorov,Anna Gialitaki,Vassilis Amiridis,Ourania Soupiona,Alexandros Papayannis,Rodanthi Mamouri,Argyro Nisantzi,Birgit Heese,Julian Hofer,Yoav Y. Schechner,Ulla Wandinger,Gelsomina Pappalardo +62 more
TL;DR: In this article, the decay phase of an unprecedented, record-breaking stratospheric perturbation caused by wildfire smoke is reported and discussed in terms of geometrical, optical, and microphysical aerosol properties.
Journal ArticleDOI
Proposed standardized definitions for vertical resolution and uncertainty in the NDACC lidar ozone and temperature algorithms - Part 2: Ozone DIAL uncertainty budget
Thierry Leblanc,Robert J. Sica,Joanna A. E. van Gijsel,Sophie Godin-Beekmann,Alexander Haefele,Thomas Trickl,Guillaume Payen,G. L. Liberti +7 more
TL;DR: In this paper, a standardized approach for the definition, propagation, and reporting of uncertainty in the ozone differential absorption lidar data products contributing to the Network for the Detection for Atmospheric Composition Change (NDACC) database is proposed.
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Diurnal changes in middle atmospheric H2O and O3: Observations in the Alpine region and climate models
Alexander Haefele,Klemens Hocke,Niklaus Kämpfer,Philippe Keckhut,Marion Marchand,Slimane Bekki,Béatrice Morel,Tatiana Egorova,Eugene Rozanov +8 more
TL;DR: In this paper, the authors investigated daily variations in middle atmospheric water vapor and ozone based on data from two ground-based microwave radiometers located in the Alpine region of Europe, where temperature data are obtained from a lidar located near the two stations and from the SABER experiment on the TIMED satellite, complemented by three different three-dimensional (3-D) chemistry-climate models (Monitoring of Stratospheric Depletion of the Ozone Layer (MSDOL), Laboratoire de Meteorologie Dynamique Reactive Processes Ruling the