Zobrazeno 1 - 10
of 86
pro vyhledávání: '"Sum Chi Lee"'
Autor:
Xiaoyi Zhao, Vitali Fioletov, Ramina Alwarda, Yushan Su, Debora Griffin, Dan Weaver, Kimberly Strong, Alexander Cede, Thomas Hanisco, Martin Tiefengraber, Chris McLinden, Henk Eskes, Jonathan Davies, Akira Ogyu, Reno Sit, Ihab Abboud, Sum Chi Lee
Publikováno v:
Remote Sensing, Vol 14, Iss 7, p 1625 (2022)
We present tropospheric nitrogen dioxide (NO2) changes observed by the Canadian Pandora measurement program in the Greater Toronto Area (GTA), Canada, and compare the results with surface NO2 concentrations measured via in situ instruments to assess
Externí odkaz:
https://doaj.org/article/0a7856cb91694e4d93a94e3429f1aa3c
Autor:
Sarah B. Gewurtz, Sean M. Backus, Amila O. De Silva, Lutz Ahrens, Alain Armellin, Marlene Evans, Susan Fraser, Melissa Gledhill, Paula Guerra, Tom Harner, Paul A. Helm, Hayley Hung, Nav Khera, Min Gu Kim, Martha King, Sum Chi Lee, Robert J. Letcher, Pamela Martin, Chris Marvin, Daryl J. McGoldrick, Anne L. Myers, Magella Pelletier, Joe Pomeroy, Eric J. Reiner, Myriam Rondeau, Marie-Claude Sauve, Mark Sekela, Mahiba Shoeib, Daniel W. Smith, Shirley Anne Smyth, John Struger, Doug Spry, Jim Syrgiannis, Jasmine Waltho
Publikováno v:
Environment International, Vol 59, Iss , Pp 183-200 (2013)
In Canada, perfluoroalkyl acids (PFAAs) have been the focus of several monitoring programs and research and surveillance studies. Here, we integrate recent data and perform a multi-media assessment to examine the current status and ongoing trends of
Externí odkaz:
https://doaj.org/article/b627db630b444371ae737b60c5f789b5
Autor:
Xiaoyi Zhao, Vitali Fioletov, Alberto Redondas, Julian Gröbner, Luca Egli, Franz Zeilinger, Javier López-Solano, Alberto Berjón Arroyo, James Kerr, Eliane Maillard Barras, Herman Smit, Michael Brohart, Reno Sit, Akira Ogyu, Ihab Abboud, Sum Chi Lee
Publikováno v:
Atmospheric Measurement Techniques. 16:2273-2295
The Brewer ozone spectrophotometer (the Brewer) is one of the World Meteorological Organization (WMO) Global Atmosphere Watch (GAW)'s standard ozone-monitoring instruments since the 1980s. The entire global Brewer ozone-monitoring network is operated
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::492b130f8de3bbdd2b60f36f51527fab
https://doi.org/10.5194/amt-16-2273-2023
https://doi.org/10.5194/amt-16-2273-2023
Autor:
Vitali Fioletov, Xiaoyi Zhao, Ihab Abboud, Michael Brohart, Akira Ogyu, Reno Sit, Sum Chi Lee, Irina Petropavlovskikh, Koji Miyagawa, Bryan J. Johnson, Patrick Cullis, John Booth, Glen McConville, C. Thomas McElroy
The Antarctic polar vortex creates unique chemical and dynamical conditions when the stratospheric air over Antarctica is isolated from the rest of the stratosphere. As a result, stratospheric ozone within the vortex remains largely unchanged for a f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::162bbfe8ce48738c921fd34452ca1600
https://doi.org/10.5194/egusphere-2023-773
https://doi.org/10.5194/egusphere-2023-773
Autor:
Fioletov, Vitali, Xiaoyi Zhao, Abboud, Ihab, Brohart, Michael, Ogyu, Akira, Sit, Reno, Sum Chi Lee, Petropavlovskikh, Irina, Miyagawa, Koji, Johnson, Bryan J., Cullis, Patrick, Booth, John, McConville, Glen, McElroy, C. Thomas
Publikováno v:
Atmospheric Chemistry & Physics Discussions; 5/22/2023, p1-35, 35p
Autor:
Vitali Fioletov, Moritz Müller, Kristof Bognar, Sum Chi Lee, Jonathan Davies, Chris A. McLinden, Debora Griffin, Xiaoyi Zhao, Alexander Cede, Kimberly Strong, Henk Eskes, Akira Ogyu, Martin Tiefengraber, Folkert Boersma
Publikováno v:
Atmospheric Measurement Techniques. 13:2131-2159
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, near-infrared, and shortwave infrared s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0b47d53f4d8ce2ca986475941462df8d
https://doi.org/10.5194/amt-13-2131-2020
https://doi.org/10.5194/amt-13-2131-2020
Autor:
Alexander Cede, Chris A. McLinden, Jonathan Davies, Sum Chi Lee, Martin Tiefengraber, Debora Griffin, Vitali Fioletov, Moritz Müller, A. Lupu, Akira Ogyu, Michael D. Moran, Xiaoyi Zhao
Publikováno v:
Atmospheric Chemistry and Physics. 19:10619-10642
Pandora spectrometers can retrieve nitrogen dioxide (NO2) vertical column densities (VCDs) via two viewing geometries: direct-sun and zenith-sky. The direct-sun NO2 VCD measurements have high quality (0.1 DU accuracy in clear-sky conditions) and do n
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::14264473d67d1f516df24993bfcc1b39
https://doi.org/10.5194/acp-19-10619-2019
https://doi.org/10.5194/acp-19-10619-2019
Autor:
Xiaoyi Zhao, Vitali Fioletov, Michael Brohart, Volodya Savastiouk, Ihab Abboud, Akira Ogyu, Jonathan Davies, Reno Sit, Sum Chi Lee, Alexander Cede, Martin Tiefengraber, Moritz Müller, Debora Griffin, Chris McLinden
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7cf0c1a517d66f4d3360a65dbca6db2e
https://doi.org/10.5194/amt-2020-324-supplement
https://doi.org/10.5194/amt-2020-324-supplement
Autor:
Elena Spinei, Martin Tiefengraber, Moritz Müller, Manuel Gebetsberger, Alexander Cede, Luke Valin, James Szykman, Andrew Whitehill, Alexander Kotsakis, Fernando Santos, Nader Abbuhasan, Xiaoyi Zhao, Vitali Fioletov, Sum Chi Lee, Robert Swap
Analysis of formaldehyde measurements by the Pandora spectrometer systems between 2016 and 2019 suggested that there was a temperature dependent process inside Pandora head sensor that emitted formaldehyde. Some parts in the head sensor were manufact
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::54329419e743db2b8bd3056e0c4cc0cf
https://doi.org/10.5194/amt-2020-158
https://doi.org/10.5194/amt-2020-158
Autor:
Folkert Boersma, Debora Griffin, Akira Ogyu, Xiaoyi Zhao, Jonathan Davies, Sum Chi Lee, Chris A. McLinden, Alexander Cede, Kristof Bognar, Kimberly Strong, Henk Eskes, Moritz Müller, Vitali Fioletov, Martin Tiefengraber
The TROPOspheric Monitoring Instrument (TROPOMI) on-board the Sentinel-5 Precursor satellite (launched on 13 October 2017) is a nadir-viewing spectrometer measuring reflected sunlight in the ultraviolet, visible, near-infrared, and shortwave infrared
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1fe4d23c18f08bf1e9e01a1c45efc5a8
https://doi.org/10.5194/amt-2019-416
https://doi.org/10.5194/amt-2019-416