F
Folkard Wittrock
Researcher at University of Bremen
Publications - 120
Citations - 5903
Folkard Wittrock is an academic researcher from University of Bremen. The author has contributed to research in topics: SCIAMACHY & Differential optical absorption spectroscopy. The author has an hindex of 39, co-authored 114 publications receiving 5291 citations.
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Journal ArticleDOI
Validation of Ozone Monitoring Instrument nitrogen dioxide columns
Edward A. Celarier,E. J. Brinksma,James F. Gleason,J. P. Veefkind,A. Cede,Jay R. Herman,D. V. Ionov,D. V. Ionov,Florence Goutail,Jean-Pierre Pommereau,Jean-Christopher Lambert,M. Van Roozendael,Gaia Pinardi,Folkard Wittrock,Anja Schönhardt,Andreas Richter,O. W. Ibrahim,Thomas Wagner,B. Bojkov,George H. Mount,Elena Spinei,C.M. Chen,Thomas J. Pongetti,Stanley P. Sander,E. J. Bucsela,Mark Wenig,D. P. J. Swart,H. Volten,M. Kroon,Pieternel F. Levelt +29 more
TL;DR: In this article, the authors review the standard NO2 data product (Version 1.0.), which is based on measurements made in the spectral region 415-465 nm by the Ozone Monitoring Instrument (OMI) on the NASA Earth Observing System-Aura satellite.
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MAX-DOAS measurements of formaldehyde in the Po-Valley
A. Heckel,Andreas Richter,T. Tarsu,Folkard Wittrock,C. Hak,I. Pundt,W. Junkermann,John P. Burrows +7 more
TL;DR: In this article, the results of the first measurement campaign of the EU FORMAT project in summer 2002 near Milan, northern Italy, ground-based scattered light differential optical absorption spectroscopy (DOAS) measurements were performed using a new multi-axis instrument.
Journal ArticleDOI
The influence of natural and anthropogenic secondary sources on the glyoxal global distribution
Stelios Myriokefalitakis,Mihalis Vrekoussis,Kostas Tsigaridis,Kostas Tsigaridis,Folkard Wittrock,Andreas Richter,Ch. Brühl,Rainer Volkamer,John P. Burrows,Maria Kanakidou +9 more
TL;DR: In this article, the authors investigated the contribution of pollution to the CHO levels by taking into account the secondary chemical formation of CHO from precursors emitted from biogenic, anthropogenic and biomass burning sources.
Journal ArticleDOI
Comparison of box-air-mass-factors and radiances for Multiple-Axis Differential Optical Absorption Spectroscopy (MAX-DOAS) geometries calculated from different UV/visible radiative transfer models
Thomas Wagner,Thomas Wagner,John P. Burrows,T. Deutschmann,B. Dix,C. von Friedeburg,Udo Frieß,F. Hendrick,Klaus-Peter Heue,Hitoshi Irie,Hironobu Iwabuchi,Yugo Kanaya,Johannes Keller,Chris A. McLinden,Hilke Oetjen,Elisa Palazzi,Andrea Petritoli,U. Platt,Oleg V. Postylyakov,Janis Pukite,Andreas Richter,M. Van Roozendael,A. Rozanov,Vladimir Rozanov,R. Sinreich,S. Sanghavi,Folkard Wittrock +26 more
TL;DR: In this article, the results of a comparison exercise of radiative transfer models (RTM) of various international research groups for multiple AXis Differential Optical Absorption Spectroscopy (MAX-DOAS) viewing geometry are presented.
Journal ArticleDOI
Ground-based validation of the Copernicus Sentinel-5p TROPOMI NO 2 measurements with the NDACC ZSL-DOAS, MAX-DOAS and Pandonia global networks
Tijl Verhoelst,Steven Compernolle,Gaia Pinardi,Jean-Christopher Lambert,Henk Eskes,Kai Uwe Eichmann,Ann Mari Fjæraa,José Granville,Sander Niemeijer,Alexander Cede,Alexander Cede,Martin Tiefengraber,François Hendrick,Andrea Pazmino,Alkiviadis F. Bais,Ariane Bazureau,K. Folkert Boersma,K. Folkert Boersma,Kristof Bognar,Angelika Dehn,Sebastian Donner,Aleksandr Elokhov,Manuel Gebetsberger,Florence Goutail,Michel Grutter de la Mora,Aleksandr N. Gruzdev,Myrto Gratsea,Georg Hansen,Hitoshi Irie,Nis Jepsen,Yugo Kanaya,Dimitris Karagkiozidis,Rigel Kivi,Karin Kreher,Pieternel F. Levelt,Cheng Liu,Moritz Müller,Monica Navarro Comas,Ankie Piters,Jean-Pierre Pommereau,Thierry Portafaix,C. Prados-Roman,Olga Puentedura,Richard Querel,Julia Remmers,Andreas Richter,J. S. Rimmer,Claudia Rivera Cárdenas,Lidia Saavedra de Miguel,Valery P. Sinyakov,Wolfgang Stremme,Kimberly Strong,Michel Van Roozendael,J. Pepijn Veefkind,Thomas Wagner,Folkard Wittrock,Margarita Yela Gonzalez,Claus Zehner +57 more
TL;DR: In this article, ground-based validation results of the atmospheric NO2 data produced operationally since April 2018 by the TROPOMI instrument on board of the ESA/EU Copernicus Sentinel-5 Precursor (S5p) satellite are compared to correlative measurements collected from, respectively, 19 Multi-Axis DOAS (MAX-DOAS), 26 NDACC Zenith-Scattered-Light DOAS, and 25 PGN/Pandora instruments distributed globally.