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CAC Events & Lectures
Chemistry Graduate Students Research Examination Schedule of Talks, May 14, 2012, Room CB 129
Guidelines for talks: 20 minutes including discussion. Talks should be less than 15 mins. Please check time & place for your Individual exams. Date Time Student Title of Talk Supervisor/ committee Individual Exam Schedule May 14 8:50 - 9:10...
11 Apr 2012 Hits:1256 CAC Seminars & Lectures
Read moreCurrent Abstract: Photochemistry at 19 KM: Measurements made from the NASA ER-2 Aircraft
Description: While at Environment Canada in the early 1990s, McElroy led a small team which developed a hand-held, diode-array spectrophotometer that flew on the Space Shuttle with Astronaut Steve MacLean...
03 Apr 2012 Hits:1240 CAC Seminars & Lectures
Read moreCurrent Abstract - Concentration measurements and gas-particle partitioning of atmospheric nitrophenols
Description: Nitrophenols are toxic, semi-volatile compounds, which are formed in the atmosphere by OH-radical initiated photo-oxidation of aromatic hydrocarbons, such as toluene. Due to their semi-volatile nature, nitrophenols can exist in...
22 Mar 2012 Hits:1507 CAC Seminars & Lectures
Read moreCurrent Abstract - Investigation of the photoenhanced reduction of nitrogen dioxide (NO2) on organic films and above soils as the missing source of daytime tropospheric nitrous acid (HONO)
Description: Recent field measurements indicating substantial daytime nitrous acid (HONO) concentrations, over snow, ground and vegetation sources, likely due to unknown surface photochemistry, have prompted the current research on the uptake...
16 Mar 2012 Hits:1563 CAC Seminars & Lectures
Read moreCurrent Abstract - Further development of resonant optical cavities for the measurement of atmospheric trace gases
Description: Cavity Ringdown Spectroscopy (CRDS) has received great deal of attention among atmospheric scientists and physicists primarily due to its potential for sensitive trace gas analysis. Relatively inexpensive diode lasers were...
12 Mar 2012 Hits:1612 CAC Seminars & Lectures
Read moreCurrent Abstract - Aging of secondary organic aerosol formed from the photo-oxidation of beta-pinene
Description: Large quantities of volatile organic compounds (VOCs) are emitted into the atmosphere from vegetation globally. In the troposphere biogenic VOCs, such as beta-pinene, undergo photo-oxidation with hydroxyl radicals and ozone...
19 Jan 2012 Hits:2486 CAC Seminars & Lectures
Read moreTalks 2011-2012
Informal Lunch-time Atmospheric Chemistry Discussion Series2011/12 Tuesdays, Noon to 1:00 PM - Schedule Mar. 27/12 Christine Facca Concentration measurements and gas-particle partitioning of atmospheric nitrophenols Sept. 27/11 Dr. Paul Makar, Senior Research Scientist, Modelling &...
08 Dec 2011 Hits:14425 CAC Seminars & Lectures
Read moreCurrent Abstract - Measurement of refractory and non refractory particulate chloride using a HR-TOF-AMS: Observation of “non” sea salt chloride and its correlation with nitryl chloride
Description: Atmospheric aerosols have an impact on human health, climate change and visibility. A high resolution Aerodyne aerosol mass spectrometer (HR-TOF-AMS) was deployed onboard the research vessel Atlantis during the CalNex...
07 Dec 2011 Hits:5468 CAC Seminars & Lectures
Read moreCurrent Abstract - Nocturnal measurements of HONO by differential optical absorption spectroscopy
Description: Differential optical absorption spectroscopy (DOAS) was used to quantify the concentration of HONO, NO2 and SO2 in the nocturnal urban atmosphere at York University over a period of one year....
11 Nov 2011 Hits:7660 CAC Seminars & Lectures
Read moreCurrent Abstract - Stable carbon isotope composition of ambient VOC
Description: Stable Carbon Isotopic Composition measurements can provide valuable information about air processing in the atmosphere. It can not only be used to distinguish physical processes such as dilution and mixing...
27 Oct 2011 Hits:7716 CAC Seminars & Lectures
Read moreCurrent Abstract: Evolution and resolution of an unknown contaminant
Description: Ongoing research has been conducted to detect and quantify nitrophenols found in particulate matter. Ambient nitrophenols are collected onto quartz filters using a high volume sampler, and are then extracted...
20 Oct 2011 Hits:7608 CAC Seminars & Lectures
Read moreCurrent Abstract: LC-MS/MS analysis of heterogeneous interactions of environmental contaminants
Description: Regulations are becoming increasingly stringent towards pesticide residues in food or in the environment. Similarly the distribution and fate of chemical contaminants in the environment is a recognized concern. Understanding...
05 Oct 2011 Hits:8014 CAC Seminars & Lectures
Read moreCurrent Abstract - HONO measurements in combination with 1-dimensional modelling
Description: The Long Path Absorption Photometer (LOPAP) is an in-situ, wet chemical sampling technique used for measuring nitrous acid (HONO) in the troposphere. The instrument quantitatively strips HONO out of the air using...
27 Sep 2011 Hits:12069 CAC Seminars & Lectures
Read moreCurrent Abstract: Two short talks on modelling developments at Environment Canada
Dr. Paul Makar will present two topics from his collaborations with EC researchers, both from recent conference presentations. Description: (1) Comparisons between AURAMS and CMAQ in the Pacific Northwest (from the 2011...
20 Sep 2011 Hits:8147 CAC Seminars & Lectures
Read moreBiogeochemistry - how the movement of chemicals through the boreal environment can be used to quantify the effects of stressors
2011 Morris Katz Memorial Lecture in Environmental Research Professor Peter J. DillonEnvironmental and Resource Studies and Chemistry DepartmentsTrent University, Peterborough, ON, CanadaWednesday, June 29, 20112:30 PMSenate ChamberN940 Ross Bldg.York University4700 Keele...
16 May 2011 Hits:9859 CAC Seminars & Lectures
Read moreCurrent Abstract - Further development of resonant optical cavities for the measurement of atmospheric trace gases
Description: The factor that most constrains application of standard absorption spectroscopy techniques is, without doubt, the limits of its sensitivity. We work towards the development of spectroscopic technique known as Cavity...
25 Apr 2011 Hits:9945 CAC Seminars & Lectures
Read moreChemistry CAC Graduate Students Research Examination
Schedule of Talks for Atmospheric ChemistryPetrie Building, Rm. 317 Guidelines for talks: 20 minutes including discussion. Talks should be less than 15 mins. Please check time & place for your individual...
06 Apr 2011 Hits:10831 CAC Seminars & Lectures
Read moreCurrent Abstract - Investigation of the photenhanced reduction of nitrogen dioxide (NO2) ...
Title: Investigation of the photenhanced reduction of nitrogen dioxide (NO2) on organic films and above soils as the missing source of daytime tropospheric nitrous acid (HONO) Description: Recent field measurements indicating substantial...
04 Apr 2011 Hits:10169 CAC Seminars & Lectures
Read moreCurrent Abstract - Investigation of hydrocarbon oxidation mechanisms using chemical ionization mass spectrometry
Description: It is now well recognized that a wide variety of volatile organic compounds (VOCs) are emitted into the atmosphere from both biogenic and anthropogenic sources. Emission inventories of Biogenic VOC...
28 Mar 2011 Hits:10642 CAC Seminars & Lectures
Read moreCurrent Abstract - A Smog Chamber Study of the Products of Beta-Pinene Oxidation by Hydroxyl Radicals: Yield Quantification Attempt using Atmospheric Pressure Chemical Ionization Tandem Mass Spectrometry (APCI-MS/MS)
Description: Beta-pinene is an important biogenic volatile organic compound (VOC). The oxidation of VOCs has been found to form semi-volatile products that have the ability to partition between the gas and...
04 Mar 2011 Hits:10375 CAC Seminars & Lectures
Read moreCAC News, Publications & Announcements
You are Invited to a Public Lecture: Investigation of isoprene OH initiated photo-oxidation mechanism and secondary organic aerosol formation in presence of high NOx
FACULTY OF GRADUATE STUDIES Graduate Programme in Chemistry ORAL EXAMINATION PROSPECTUS Altin Elezi A Candidate for the Degree of Master of Science Public Lecture at 10:00 AM, Wednesday, May 16, 2012, Room 115 CB ...
02 May 2012 CAC News & Announcements
Read moreWarwick F Vincent, Prof. Laval University to present 2012 Morris Katz Memorial Lecture in Environmental Research on Monday, May 28th
NOTICE: This year's Annual Morris Katz Memorial Lecture in Environmental Research will be held on Monday, May 28, 20122:30 PM Senate ChamberN940 Ross Bldg.York University Prof. Warwick F. Vincent Director, Centre for Northern Studies(CEN:...
12 Apr 2012 CAC News & Announcements
Read morePhotochemistry at 19 KM: Measurements Made From the NASA ER-2 Aircraft
Professor Tom McElroy, CSA/ABB/NSERC/York U Industrial Research Chair in Atmospheric Remote Sounding, will present a talk entitled: Photochemistry at 19 KM: Measurements made from the NASA ER-2 aircraft, as part of...
22 Mar 2012 CAC News & Announcements
Read moreDetermination of tropospheric vertical columns of NO2 and aerosol optical properties in a rural setting using MAX-DOAS
Authors: Halla, J. D., Wagner, T., Beirle, S., Brook, J. R., Hayden, K. L., O'Brien, J. M., Ng, A., Majonis, D., Wenig, M. O., and McLaren, R. Journal: Atmospheric Chemistry and Physics Date: December 2011 Abstract: Multi-AXis Differential Optical Absorption Spectroscopy (MAX-DOAS) measurements were performed in a rural location of...
19 Jan 2012 Journal Publications
Read moreInversion of tropospheric profiles of aerosol extinction and HCHO and NO2 mixing ratios from MAX-DOAS observations in Milano during the summer of 2003 and comparison with independent data sets
Authors: Wagner, T., Beirle, S., Brauers, T., Deutschmann, T., Frieß, U., Hak, C., Halla, J. D., Heue, K. P., Junkermann, W., Li, X., Platt, U., and Pundt-Gruber, I Journal: Atmospheric Measurement Techniques Date: December 2011 Abstract: We present aerosol and trace gas profiles derived from MAX-DOAS observations. Our inversion...
19 Jan 2012 Journal Publications
Read moreRob McLaren is currently participating in the NOAA led Uintah Basin Winter Ozone Study (UBWOS), Jan 15 - Mar 01, 2012
Rob McLaren is currently participating in the NOAA led Uintah Basin Winter Ozone Study (UBWOS), Jan 15 - Mar 01, 2012. This field study is taking place in the Uintah...
19 Jan 2012 CAC News & Announcements
Read moreComparison of MAX-DOAS/radiative transfer, aircraft and satellite measurements of the Vertical column density of NO2 at Ridgetown during the BAQS-Met field study
Jamie Halla was first author on a publication (below) that just appeared in the BAQS-Met Special Issue in Atmospheric Chemistry and Physics. The publication outlines a comparison of MAX-DOAS/radiative transfer,...
14 Dec 2011 CAC News & Announcements
Read moreAGU Conference San Francisco Dec. 4-9, 2011
CAC group members, Ibraheem Nuaaman, Patryk Wojtal and Rob McLaren were amongst the 21,500 attendeess at the American Geophysical Union Conference in San Francisco Dec 04-09, 2011. The following talks...
14 Dec 2011 CAC News & Announcements
Read moreA survey of NO2:SO2 emission ratios measured in marine vessel plumes in the Strait of Georgia
Authors: Robert McLaren, Patryk Wojtal, Jamie D. Halla, Criss Mihele, Jeffrey R. Book Journal: Atmospheric Environment Date: October 2011 Abstract: We report nocturnal measurements of NO2 and SO2 by DOAS within marine vessel plumes...
29 Nov 2011 CAC News & Announcements
Read moreMethod for determination of stable carbon isotope ratio of methylnitrophenols in atmospheric particulate matter
Authors: S. Moukhtar, M. Saccon, A. Kornilova, S. Irei, L. Huang, and J. Rudolph Journal: Atmospheric Measurement Techniques, 4, 2453-2464 Date: November 2011 Abstract: A technique for the measurement of the stable isotope...
18 Nov 2011 Journal Publications
Read moreYou are invited to a Public Lecture: Mass Spectrometric Investigation of the OH induced oxidation of Isoprene using O2+ as a Chemical Ionization Reagent
FACULTY OF GRADUATE STUDIES, Graduate Programme in Chemistry ORAL EXAMINATION PROSPECTUS Aeysha AhmadA Candidate for the Degree ofMaster of Science Title of Thesis:Mass spectrometric investigation of the OH induced oxidation of isoprene using...
17 Nov 2011 CAC News & Announcements
Read moreProfessor Robert McLaren attended the University Corporation for Atmospheric Research (UCAR) Annual meetings in Boulder, CO; Oct 3-6, 2011.
Rob McLaren attended the University Corporation for Atmospheric Research (UCAR) Annual meetings in Boulder, CO; Oct 3-6, 2011. York University is one of the few Canadian universities that is a UCAR member. For...
20 Oct 2011 CAC News & Announcements
Read moreProf. Dr. Andreas Wahner Presents the 21st Annual Harold I. Schiff Lecture, Friday, December 2, 2011
Prof. Dr. Andreas Wahner, Institute for Energy and Climate Research - Troposphere IEK-8, Forschungszentrum Juelich, Germany. Title: Atmospheric Trace Gas Degradation and Secondary Pollutant Formation: New Insights from Process Studies. Time &...
20 Oct 2011 CAC News & Announcements
Read moreCAC girls run for the cure!
On October 2nd, graduate students, alumni and staff of the CAC will be participating in the Canadian Breast Cancer Foundation CIBC Run for the Cure. The Run for the Cure...
29 Sep 2011 CAC News & Announcements
Read moreProf. Jack McConnell attended PREMIER Mission Advisory Group meeting
Prof. Jack McConnell attended PREMIER (Process Exploration through Measurement of Infrared and millimetre-wave Emitted Radiation) Mission Advisory Group meeting. PREMIER (PRocess Exploration through Measurements of Infrared and millimetre-wave Emitted Radiation) is...
27 Sep 2011 CAC News & Announcements
Read moreImpact of Fuel Quality Regulation and Speed Reductions on Shipping Emissions: Implications for Climate and Air Quality
Authors: Daniel A. Lack, Christopher D. Cappa, Justin Langridge, Roya Bahreini, Gina Buffaloe, Charles Brock, Kate Ceully, Derek Coffman, Katherine Hayden, John Holloway, Brian Lerner, Paola Massoli, Shao-Meng Li, Robert...
27 Sep 2011 Journal Publications
Read moreStable carbon isotope ratio of secondary particulate organic matter formed by photooxidation of toluene in indoor smog chamber
Authors: Satoshi Irei, Donald Hastie, Lin Huang, Janeen Auld, and Jochen Rudolph. Journal: Journal of Atmospheric Environment Date: 2011 Abstract: Laboratory studies were conducted for stable carbon isotope ratio for secondary particulate organic...
27 Sep 2011 Journal Publications
Read moreMehrnaz Sarrafzadeh and Zoya Dobrusin attended the 1st Annual NSERC CREATE Summer School
Mehrnaz Sarrafzadeh and Zoya Dobrusin, graduate students with Prof. Hastie, attended the 1st Annual NSERC CREATE Summer School in Arctic Atmospheric Science held at the Nottawasaga Inn in Alliston, Ontario (July...
20 Jul 2011 CAC News & Announcements
Read more355 Lumbers Bldg. - 4700 Keele Street - Toronto - Ontario - Canada - M3J 1P3