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News & Events

Mar
3
Tue
Method Development for Concentration Measurements of SVOCs in the Atmosphere @ York University, Rm. 317 Petrie
Mar 3 @ 12:00 pm – 1:00 pm

Informal Lunchtime Atmospheric Chemistry Discussion Series

Presented by: Yasamin Hassani, Graduate Student
Description:  to be posted.

Apr
7
Tue
HONO-Measurements During the OS Field Campaign at AMS13 @ York University, Rm. 317 Petrie
Apr 7 @ 12:00 pm – 1:00 pm

Informal Lunchtime Atmospheric Chemistry Discussion Series

Presented by:  Kevin Nikelski, Graduate Student
Description: Nitrous acid (HONO) is of particular relevance to atmospheric chemistry in regards to its significant contribution to photochemical production of the OH radical, which serves as the main daytime oxidant in the troposphere. Many studies have reported observing significant HONO mixing ratios during daylight hours, which could be due to an as yet unexplained continuous daytime source and/or indicating a method of HONO uptake and storage during the night with subsequent release the next day. In this talk, I will discuss HONO measurements from Aug 17th- Sept 11th during the OS field campaign region near Fort McMurray Alberta at the AMS13 ground site. The measurements in question were obtained through use of a DOAS 2000 telescope and 30 corner cube retro-reflector, along a 2.304 km path length. The methodology for spectral fitting of HONO using (DOASIS) will be discussed in some detail, as will both night-time and daytime preliminary mixing ratios. Preliminary results indicate that HONO mixing ratios at night during the OS field campaign were typically less than 300ppt, much lower than those observed in the urban area of Toronto (York University), which has a median nighttime maxing ratio of 1.0ppb. The lower levels of HONO at AMS13 is consistent with the lower night-time mixing ratios of the main precursor, NO2, which had a night-time median of 1.1 ppb during dark periods at AMS13, compared to a nighttime median of 16ppb in Toronto.

Apr
20
Mon
Notice of Public Lecture: Ibraheem Nuaaman @ York University, Rm. 317 Petrie
Apr 20 @ 1:30 pm – 2:15 pm
May
4
Mon
Research Examinations for CAC students, Monday, May 4, 2015
May 4 @ 8:45 am – 2:30 pm
May
25
Mon
IACPES Symposium Day, Monday, May 25, 2015 @ Life Science Building, York University
May 25 @ 9:00 am – 6:00 pm

See IACPES website for more information.

May
26
Tue
Summer Course in Atmospheric Chemistry and Physics, May 26-28, 2015 @ York University
May 26 @ 8:00 am – 5:00 pm

Summer Course in Atmospheric Chemistry and Physics, May 26-28, 2015.  See website for more information.

May
27
Wed
Summer Course in Atmospheric Chemistry and Physics, May 26-28, 2015 @ York University
May 27 @ 8:00 am – 5:00 pm

Summer Course in Atmospheric Chemistry and Physics, May 26-28, 2015.  See website for more information.

May
28
Thu
Summer Course in Atmospheric Chemistry and Physics, May 26-28, 2015 @ York University
May 28 @ 8:00 am – 5:00 pm

Summer Course in Atmospheric Chemistry and Physics, May 26-28, 2015.  See website for more information.

Harold I Schiff Lecture in Atmospheric Chemistry: Steven S Brown @ 103 Life Science Building, York University
May 28 @ 2:30 pm – 4:00 pm

Prof. Steven S. Brown, NOAA,  presents the 24th Annual
Harold I Schiff Lecture Faculty of Science.
For more information click here.

 

 

 

May
29
Fri
IACPES Training Day, Friday, May 29, 2015 @ York University
May 29 @ 8:00 am – 5:00 pm

Updated on December 6th, 2012.