Search Results - "Sum Chi Lee"

Assessment of the quality of TROPOMI high-spatial-resolution NO2 data products in the Greater Toronto Area by Zhao, Xiaoyi, Griffin, Debora, Vitali Fioletov, McLinden, Chris, Cede, Alexander, Tiefengraber, Martin, Müller, Moritz, Bognar, Kristof, Strong, Kimberly, Boersma, Folkert, Eskes, Henk, Davies, Jonathan, Ogyu, Akira, Sum Chi Lee

“…The TROPOspheric Monitoring Instrument (TROPOMI) aboard the Sentinel-5 Precursor satellite (launched on 13 October 2017) is a nadir-viewing spectrometer…”
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Sorbent-Impregnated Polyurethane Foam Disk for Passive Air Sampling of Volatile Fluorinated Chemicals by Shoeib, Mahiba, Harner, Tom, Lee, Sum Chi, Lane, Douglas, Zhu, Jiping

“…A passive air sampler comprising a polyurethane foam (PUF) disk impregnated with XAD-4 powder has been developed. This sorbent-impregnated PUF (SIP) disk…”
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The world Brewer reference triad – updated performance assessment and new double triad by Zhao, Xiaoyi, Fioletov, Vitali, Brohart, Michael, Savastiouk, Volodya, Abboud, Ihab, Ogyu, Akira, Davies, Jonathan, Sit, Reno, Lee, Sum Chi, Cede, Alexander, Tiefengraber, Martin, Müller, Moritz, Griffin, Debora, McLinden, Chris

“…The Brewer ozone spectrophotometer (the Brewer) was designed at Environment and Climate Change Canada (ECCC) in the 1970s to make accurate automated total…”
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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 by Spinei, Elena, Tiefengraber, Martin, Müller, Moritz, Gebetsberger, Manuel, Cede, Alexander, Valin, Luke, Szykman, James, Whitehill, Andrew, Kotsakis, Alexander, Santos, Fernando, Abbuhasan, Nader, Zhao, Xiaoyi, Fioletov, Vitali, Lee, Sum Chi, Swap, Robert

“…Analysis of formaldehyde measurements by the Pandora spectrometer systems between 2016 and 2019 suggested that there was a temperature-dependent process inside…”
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Polychlorinated Naphthalenes in the Global Atmospheric Passive Sampling (GAPS) Study by Lee, Sum Chi, Harner, Tom, Pozo, Karla, Shoeib, Mahiba, Wania, Frank, Muir, Derek C. G, Barrie, Leonard A, Jones, Kevin C

“…Air concentrations of polychlorinated naphthalenes (PCNs) were measured as part of the Global Atmospheric Passive Sampling (GAPS) study to assess their spatial…”
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Calycosin orchestrates the functions of Danggui Buxue Tang, a Chinese herbal decoction composing of Astragali Radix and Angelica Sinensis Radix: An evaluation by using calycosin-knock out herbal extract by Gong, Amy Guo-wei, Li, Ning, Lau, Kei-man, Lee, Pinky Sum-chi, Yan, Lu, Xu, Miranda Li, Lam, Candy Ting-wai, Kong, Ava Yeung-yeung, Lin, Huang-quan, Dong, Tina Ting-xia, Tsim, Karl Wah-keung

“…Danggui Buxue Tang (DBT) is a classical Chinese herbal decoction containing two herbs, Astragali Radix (AR) and Angelicae Sinensis Radix (ASR), which serves as…”
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Measuring and simulating atmospheric concentration trends of polychlorinated biphenyls in the Northern Hemisphere by Hung, Hayley, Chi Lee, Sum, Wania, Frank, Blanchard, Pierrette, Brice, Ken

“…Temporal trend analysis of polychlorinated biphenyls (PCB) air concentration data measured in the Canadian Arctic and around the Great Lakes in the 1990s has…”
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Wastewater Treatment Plant and Landfills as Sources of Polyfluoroalkyl Compounds to the Atmosphere by Ahrens, Lutz, Shoeib, Mahiba, Harner, Tom, Lee, Sum Chi, Guo, Rui, Reiner, Eric J

“…Polyfluoroalkyl compounds (PFCs) were determined in air around a wastewater treatment plant (WWTP) and two landfill sites using sorbent-impregnated…”
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Indoor Sources of Poly- and Perfluorinated Compounds (PFCS) in Vancouver, Canada: Implications for Human Exposure by Shoeib, Mahiba, Harner, Tom, M. Webster, Glenys, Lee, Sum Chi

“…Perfluorooctane sulfonate (PFOS) and perfluorooctanoate (PFOA) are widely detected in human blood and serum and are of concern due to their potential toxicity…”
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Global Distribution of Linear and Cyclic Volatile Methyl Siloxanes in Air by Genualdi, Susie, Harner, Tom, Cheng, Yu, MacLeod, Matthew, Hansen, Kaj M, van Egmond, Roger, Shoeib, Mahiba, Lee, Sum Chi

“…The global distribution of linear and cyclic volatile methyl silxoanes (VMS) was investigated at 20 sites worldwide, including 5 locations in the Arctic, using…”
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Seasonally Resolved Concentrations of Persistent Organic Pollutants in the Global Atmosphere from the First Year of the GAPS Study by Pozo, Karla, Harner, Tom, Lee, Sum Chi, Wania, Frank, Muir, Derek C. G, Jones, Kevin C

“…Concentrations of persistent organic pollutants (POPs) in air are reported from the first full year of the Global Atmospheric Passive Sampling (GAPS) Network…”
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Total ozone variability and trends over the South Pole during the wintertime by Fioletov, Vitali, Zhao, Xiaoyi, Abboud, Ihab, Brohart, Michael, Ogyu, Akira, Sit, Reno, Lee, Sum Chi, Petropavlovskikh, Irina, Miyagawa, Koji, Johnson, Bryan J, Cullis, Patrick, Booth, John, McConville, Glen, McElroy, C. Thomas

“…The Antarctic polar vortex creates unique chemical and dynamical conditions when the stratospheric air over Antarctica is isolated from the rest of the…”
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Global Pilot Study of Legacy and Emerging Persistent Organic Pollutants using Sorbent-Impregnated Polyurethane Foam Disk Passive Air Samplers by Genualdi, Susie, Lee, Sum Chi, Shoeib, Mahiba, Gawor, Anya, Ahrens, Lutz, Harner, Tom

“…Sorbent-impregnated polyurethane foam (SIP) disk passive air samplers were deployed alongside polyurethane foam (PUF) disk samplers at 20 sites during the 2009…”
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Application of Sorbent Impregnated Polyurethane Foam (SIP) Disk Passive Air Samplers for Investigating Organochlorine Pesticides and Polybrominated Diphenyl Ethers at the Global Scale by Koblizkova, Martina, Genualdi, Susan, Lee, Sum Chi, Harner, Tom

“…As part of continued efforts under the Global Atmospheric Passive Sampling (GAPS) Network to develop passive air samplers applicable to a wide-range of…”
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Assessing seasonal and spatial trends of persistent organic pollutants (POPs) in Indian agricultural regions using PUF disk passive air samplers by Pozo, Karla, Harner, Tom, Lee, Sum Chi, Sinha, Ravindra K., Sengupta, B., Loewen, Mark, Geethalakshmi, V., Kannan, Kurunthachalam, Volpi, Valerio

“…The first survey of persistent organic pollutant (POP) concentrations in air across several Indian agricultural regions was conducted in 2006–2007. Passive…”
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Seasonal and altitudinal variations of legacy and current-use pesticides in the Brazilian tropical and subtropical mountains by Meire, Rodrigo Ornellas, Lee, Sum Chi, Yao, Yuan, Targino, Admir C., Torres, João Paulo M., Harner, Tom

“…Polyurethane foam (PUF) disk passive air samplers were deployed over summer (December–March) and winter (June–August) periods in 2007–2008 along altitudinal…”
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Retrieval of total column and surface NO2 from Pandora zenith-sky measurements by Zhao, Xiaoyi, Griffin, Debora, Vitali Fioletov, McLinden, Chris, Davies, Jonathan, Ogyu, Akira, Sum Chi Lee, Lupu, Alexandru, Moran, Michael D, Cede, Alexander, Tiefengraber, Martin, Müller, Moritz

“…Pandora spectrometers can retrieve nitrogen dioxide (NO2) vertical column densities (VCDs) via two viewing geometries: direct Sun and zenith sky. The…”
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Tropospheric and Surface Nitrogen Dioxide Changes in the Greater Toronto Area during the First Two Years of the COVID-19 Pandemic by Zhao, Xiaoyi, Fioletov, Vitali, Alwarda, Ramina, Su, Yushan, Griffin, Debora, Weaver, Dan, Strong, Kimberly, Cede, Alexander, Hanisco, Thomas, Tiefengraber, Martin, McLinden, Chris, Eskes, Henk, Davies, Jonathan, Ogyu, Akira, Sit, Reno, Abboud, Ihab, Lee, Sum Chi

“…We present tropospheric nitrogen dioxide (NO2) changes observed by the Canadian Pandora measurement program in the Greater Toronto Area (GTA), Canada, and…”
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The site-specific primary calibration conditions for the Brewer spectrophotometer by Zhao, Xiaoyi, Fioletov, Vitali, Redondas, Alberto, Gröbner, Julian, Egli, Luca, Zeilinger, Franz, López-Solano, Javier, Arroyo, Alberto Berjón, Kerr, James, Maillard Barras, Eliane, Smit, Herman, Brohart, Michael, Sit, Reno, Ogyu, Akira, Abboud, Ihab, Lee, Sum Chi

“…The Brewer ozone spectrophotometer (the Brewer) is one of the World Meteorological Organization (WMO) Global Atmosphere Watch (GAW)'s standard ozone-monitoring…”
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Perfluoroalkyl acids in the Canadian environment: Multi-media assessment of current status and trends by Gewurtz, Sarah B., Backus, Sean M., De Silva, Amila O., Ahrens, Lutz, Armellin, Alain, Evans, Marlene, Fraser, Susan, Gledhill, Melissa, Guerra, Paula, Harner, Tom, Helm, Paul A., Hung, Hayley, Khera, Nav, Kim, Min Gu, King, Martha, Lee, Sum Chi, Letcher, Robert J., Martin, Pamela, Marvin, Chris, McGoldrick, Daryl J., Myers, Anne L., Pelletier, Magella, Pomeroy, Joe, Reiner, Eric J., Rondeau, Myriam, Sauve, Marie-Claude, Sekela, Mark, Shoeib, Mahiba, Smith, Daniel W., Smyth, Shirley Anne, Struger, John, Spry, Doug, Syrgiannis, Jim, Waltho, Jasmine

“…In Canada, perfluoroalkyl acids (PFAAs) have been the focus of several monitoring programs and research and surveillance studies. Here, we integrate recent…”
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