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    Academic Journals

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• Version 2 of the global catalogue of large anthropogenic and volcanic SO.sub.2 sources and emissions derived from satellite measurements.

  Authors:Vitali E. Fioletov, Chris A. McLinden, Debora Griffin, Ihab Abboud, Nickolay Krotkov, Peter J. T. Leonard, et al.From:Earth System Science Data (Vol. 15, Issue 1) Peer-Reviewed

  Jan. 4, 2023419 words Article Sulfur dioxide (SO.sub.2) measurements from the Ozone Monitoring Instrument (OMI), Ozone Mapping and Profiler Suite (OMPS), and TROPOspheric Monitoring Instrument (TROPOMI) satellite spectrometers were used to update and...

• A new machine-learning-based analysis for improving satellite-retrieved atmospheric composition data: OMI SO.sub.2 as an example.

  Authors:Can Li, Joanna Joiner, Fei Liu, Nickolay A. Krotkov, Vitali Fioletov, and Chris McLindenFrom:Atmospheric Measurement Techniques (Vol. 15, Issue 18) Peer-Reviewed

  Sept. 27, 2022457 words Article Despite recent progress, satellite retrievals of anthropogenic SO.sub.2 still suffer from relatively low signal-to-noise ratios. In this study, we demonstrate a new machine learning data analysis method to improve the...

• Effect of polyoxymethylene (POM-H Delrin) off-gassing within the Pandora head sensor on direct-sun and multi-axis formaldehyde column measurements in 2016-2019.

  Authors:Elena Spinei, Martin Tiefengraber, Moritz Müller, Manuel Gebetsberger, Alexander Cede, Luke Valin, et al.From:Atmospheric Measurement Techniques (Vol. 14, Issue 1) Peer-Reviewed

  Jan. 28, 2021330 words Brief article Analysis of formaldehyde measurements by the Pandora spectrometer systems between 2016 and 2019 suggested that there was a temperature-dependent process inside the Pandora head sensor that emitted formaldehyde. Some...

• Retrieval of total column and surface NO.sub.2 from Pandora zenith-sky measurements

  Authors:Xiaoyi Zhao, Debora Griffin, Vitali Fioletov, Chris McLinden, Jonathan Davies, Akira Ogyu, et al.From:Atmospheric Chemistry and Physics (Vol. 19, Issue 16) Peer-Reviewed

  Aug. 22, 2019275 words Author abstract, Bri...

  Pandora spectrometers can retrieve nitrogen dioxide (NO.sub.2) vertical column densities (VCDs) via two viewing geometries: direct Sun and zenith sky. The direct-Sun NO.sub.2 VCD measurements have high quality...

• Quantifying urban, industrial, and background changes in NO.sub.2 during the COVID-19 lockdown period based on TROPOMI satellite observations.

  Authors:Vitali Fioletov, Chris A. McLinden, Debora Griffin, Nickolay Krotkov, Fei Liu, and Henk EskesFrom:Atmospheric Chemistry and Physics (Vol. 22, Issue 6) Peer-Reviewed

  Mar. 31, 2022439 words Article The COVID-19 lockdown had a large impact on anthropogenic emissions of air pollutants and particularly on nitrogen dioxide (NO.sub.2). While the overall NO.sub.2 decline over some large cities is well-established,...

• Anthropogenic and volcanic point source SO.sub.2 emissions derived from TROPOMI on board Sentinel-5 Precursor: first results.

  Authors:Vitali Fioletov, Chris A. McLinden, Debora Griffin, Nicolas Theys, Diego G. Loyola, Pascal Hedelt, et al.From:Atmospheric Chemistry and Physics (Vol. 20, Issue 9) Peer-Reviewed

  May 13, 2020318 words Brief article The paper introduces the first TROPOMI-based sulfur dioxide (SO.sub.2) emissions estimates for point sources. A total of about 500 continuously emitting point sources releasing about 10 kt yr.sup.-1 to more...

• A sulfur dioxide Covariance-Based Retrieval Algorithm (COBRA): application to TROPOMI reveals new emission sources.

  Authors:Nicolas Theys, Vitali Fioletov, Can Li, Isabelle De Smedt, Christophe Lerot, Chris McLinden, et al.From:Atmospheric Chemistry and Physics (Vol. 21, Issue 22) Peer-Reviewed

  Nov. 17, 2021393 words Brief article Sensitive and accurate detection of sulfur dioxide (SO.sub.2) from space is important for monitoring and estimating global sulfur emissions. Inspired by detection methods applied in the thermal infrared, we present here...

• Multi-source SO.sub.2 emission retrievals and consistency of satellite and surface measurements with reported emissions

  Authors:Vitali Fioletov, Chris A. McLinden, Shailesh K. Kharol, Nickolay A. Krotkov, Can Li, Joanna Joiner, et al.From:Atmospheric Chemistry and Physics (Vol. 17, Issue 20) Peer-Reviewed

  Oct. 24, 2017285 words Author abstract, Bri... Reported sulfur dioxide (SO.sub.2) emissions from US and Canadian sources have declined dramatically since the 1990s as a result of emission control measures. Observations from the Ozone Monitoring Instrument (OMI) on...

• The world Brewer reference triad - updated performance assessment and new double triad.

  Authors:Xiaoyi Zhao, Vitali Fioletov, Michael Brohart, Volodya Savastiouk, Ihab Abboud, Akira Ogyu, et al.From:Atmospheric Measurement Techniques (Vol. 14, Issue 3) Peer-Reviewed

  Mar. 23, 2021438 words Article The Brewer ozone spectrophotometer (the Brewer) was designed at Environment and Climate Change Canada (ECCC) in the 1970s to make accurate automated total ozone column measurements. Since the 1980s, the Brewer instrument...

• The Ozone Monitoring Instrument: overview of 14 years in space

  Authors:Pieternel F. Levelt, Joanna Joiner, Johanna Tamminen, J. Pepijn Veefkind, Pawan K. Bhartia, Deborah C. Stein Zweers, et al.From:Atmospheric Chemistry and Physics (Vol. 18, Issue 8) Peer-Reviewed

  Apr. 24, 2018141 words Author abstract, Bri... This overview paper highlights the successes of the Ozone Monitoring Instrument (OMI) on board the Aura satellite spanning a period of nearly 14 years. Data from OMI has been used in a wide range of...

• Accuracy, precision, and temperature dependence of Pandora total ozone measurements estimated from a comparison with the Brewer triad in Toronto

  Authors:Xiaoyi Zhao, Vitali Fioletov, Alexander Cede, Jonathan Davies, and Kimberly StrongFrom:Atmospheric Measurement Techniques (Vol. 9, Issue 12) Peer-Reviewed

  Nov. 30, 2016278 words Brief article This study evaluates the performance of the recently developed Pandora spectrometer by comparing it with the Brewer reference triad. This triad was established by Environment and Climate Change Canada (ECCC) in the...

• Assessing the impact of clouds on ground-based UV-visible total column ozone measurements in the high Arctic

  Authors:Xiaoyi Zhao, Kristof Bognar, Vitali Fioletov, Andrea Pazmino, Florence Goutail, Luis Millan, et al.From:Atmospheric Measurement Techniques (Vol. 12, Issue 4) Peer-Reviewed

  Apr. 18, 201952 words Author abstract, Bri... Byline: Xiaoyi Zhao, Kristof Bognar, Vitali Fioletov, Andrea Pazmino, Florence Goutail, Luis Millá,n, Gloria Manney, Cristen Adams, Kimberly Strong To access, purchase, authenticate, or subscribe to the full-text...

• NH.sub.3 emissions from large point sources derived from CrIS and IASI satellite observations

  Authors:Enrico Dammers, Chris A. McLinden, Debora Griffin, Mark W. Shephard, Shelley Van Der Graaf, Erik Lutsch, et al.From:Atmospheric Chemistry and Physics (Vol. 19, Issue 19) Peer-Reviewed

  Oct. 2, 2019374 words Brief article, Repor...

  Ammonia (NH.sub.3) is an essential reactive nitrogen species in the biosphere and through its use in agriculture in the form of fertilizer (important for sustaining humankind). The current emission levels, however,...

• OMI satellite observations of decadal changes in ground-level sulfur dioxide over North America

  Authors:Shailesh K. Kharol, Chris A. McLinden, Christopher E. Sioris, Mark W. Shephard, Vitali Fioletov, Aaron van Donkelaar, et al.From:Atmospheric Chemistry and Physics (Vol. 17, Issue 9) Peer-Reviewed

  May 15, 2017199 words Author abstract, Bri... Sulfur dioxide (SO.sub.2) has a significant impact on the environment and human health. We estimated ground-level sulfur dioxide (SO.sub.2) concentrations from the Ozone Monitoring Instrument (OMI) using SO.sub.2...

• Assessment of the quality of TROPOMI high-spatial-resolution NO.sub.2 data products in the Greater Toronto Area.

  Authors:Xiaoyi Zhao, Debora Griffin, Vitali Fioletov, Chris McLinden, Alexander Cede, Martin Tiefengraber, et al.From:Atmospheric Measurement Techniques (Vol. 13, Issue 4) Peer-Reviewed

  Apr. 30, 2020423 words Article The TROPOspheric Monitoring Instrument (TROPOMI) aboard the Sentinel-5 Precursor satellite (launched on 13 October 2017) is a nadir-viewing spectrometer measuring reflected sunlight in the ultraviolet, visible,...

• Detecting volcanic sulfur dioxide plumes in the Northern Hemisphere using the Brewer spectrophotometers, other networks, and satellite observations

  Authors:Christos S. Zerefos, Kostas Eleftheratos, John Kapsomenakis, Stavros Solomos, Antje Inness, Dimitris Balis, et al.From:Atmospheric Chemistry and Physics (Vol. 17, Issue 1) Peer-Reviewed

  Jan. 11, 2017423 words Author abstract, Bri... This study examines the adequacy of the existing Brewer network to supplement other networks from the ground and space to detect SO.sub.2 plumes of volcanic origin. It was found that large volcanic eruptions of the last...

• Continuation of long-term global SO.sub.2 pollution monitoring from OMI to OMPS

  Authors:Yan Zhang, Can Li, Nickolay A. Krotkov, Joanna Joiner, Vitali Fioletov, and Chris McLindenFrom:Atmospheric Measurement Techniques (Vol. 10, Issue 4) Peer-Reviewed

  Apr. 20, 2017454 words Author abstract, Bri... Over the past 20 years, advances in satellite remote sensing of pollution-relevant species have made space-borne observations an increasingly important part of atmospheric chemistry research and air quality...

• TROPOMI/S5P total ozone column data: global ground-based validation and consistency with other satellite missions

  Authors:Katerina Garane, Maria-Elissavet Koukouli, Tijl Verhoelst, Christophe Lerot, Klaus-Peter Heue, Vitali Fioletov, et al.From:Atmospheric Measurement Techniques (Vol. 12, Issue 10) Peer-Reviewed

  Oct. 2, 2019515 words Author abstract, Bri...

  In October 2017, the Sentinel-5 Precursor (S5P) mission was launched, carrying the TROPOspheric Monitoring Instrument (TROPOMI), which provides a daily global coverage at a spatial resolution as high as...

• Assessment of the aerosol optical depths measured by satellite-based passive remote sensors in the Alberta oil sands region

  Authors:Christopher E. Sioris, Chris A. McLinden, Mark W. Shephard, Vitali E. Fioletov, and Ihab AbboudFrom:Atmospheric Chemistry and Physics (Vol. 17, Issue 3) Peer-Reviewed

  Feb. 9, 2017183 words Brief article Several satellite aerosol optical depth (AOD) products are assessed in terms of their data quality in the Alberta oil sands region. The instruments consist of MODIS (Moderate Resolution Imaging Spectroradiometer),...

• Global total ozone recovery trends attributed to ozone-depleting substance (ODS) changes derived from five merged ozone datasets.

  Authors:Mark Weber, Carlo Arosio, Melanie Coldewey-Egbers, Vitali E. Fioletov, Stacey M. Frith, Jeannette D. Wild, et al.From:Atmospheric Chemistry and Physics (Vol. 22, Issue 10) Peer-Reviewed

  May 25, 2022445 words Article We report on updated trends using different merged zonal mean total ozone datasets from satellite and ground-based observations for the period from 1979 to 2020. This work is an update of the trends reported in Weber et...