BEGIN:VCALENDAR
VERSION:2.0
METHOD:PUBLISH
CALSCALE:GREGORIAN
PRODID:-//WordPress - MECv7.33.0//EN
X-ORIGINAL-URL:https://essic.umd.edu/
X-WR-CALNAME:ESSIC
X-WR-CALDESC:UMD - Earth System Science Interdisciplinary Center
X-WR-TIMEZONE:America/New_York
BEGIN:VTIMEZONE
TZID:America/New_York
X-LIC-LOCATION:America/New_York
BEGIN:DAYLIGHT
TZOFFSETFROM:-0500
TZOFFSETTO:-0400
TZNAME:EDT
DTSTART:20260308T030000
RRULE:FREQ=YEARLY;BYMONTH=03;BYDAY=2SU
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:-0400
TZOFFSETTO:-0500
TZNAME:EST
DTSTART:20261101T010000
RRULE:FREQ=YEARLY;BYMONTH=11;BYDAY=1SU
END:STANDARD
END:VTIMEZONE
REFRESH-INTERVAL;VALUE=DURATION:PT1H
X-PUBLISHED-TTL:PT1H
X-MS-OLK-FORCEINSPECTOROPEN:TRUE
BEGIN:VEVENT
CLASS:PUBLIC
UID:MEC-fe33b4901179d6118f8859c27426e45b@essic.umd.edu
DTSTART;TZID=America/New_York:20200928T140000
DTEND;TZID=America/New_York:20200928T140000
DTSTAMP:20230905T131545Z
CREATED:20230905
LAST-MODIFIED:20230905
PRIORITY:5
SEQUENCE:0
TRANSP:OPAQUE
SUMMARY:The Role of Reactive Halogens in Air Pollution and Climate
DESCRIPTION:This event has passed. See the seminar recording here:\n\n\n\nProf. Becky Alexander\nDirector of the Program on Climate Change\nUniversity of Washington\nMonday September 28, 2020, 2 PM\n \nAbstract:\nReactive halogens are best known for their influence on stratospheric ozone depletion.  Halogens also impact tropospheric chemistry, with implications for air pollution and climate. Although we’ve known since the 1980s that reactive halogens are responsible for springtime Arctic ozone depletion events, their global impacts are still unknown. Due to complex chemistry and challenges in measuring reactive halogens, atmospheric chemists are only just beginning to understand its importance and the magnitude of their impacts. In this talk I present evidence from ice core measurements and global modeling that tropospheric reactive halogen abundances have changed significantly in the past due to both natural climate change and anthropogenic emissions. I will discuss the potential implications for climate and air pollution, both in the past and into the future.\n \nBio-sketch:\nBecky Alexander is a Professor in the Department of Atmospheric Sciences and the Director of the Program on Climate Change at the University of Washington (UW). She earned her Ph.D. in chemistry at the University of California, San Diego, and was awarded a NOAA Climate and Global Change Postdoctoral Fellowship to work in the Department of Earth and Planetary Sciences at Harvard University. Her research group studies air pollution and feedbacks between atmospheric chemistry and climate using ice-core and aerosol observations and global chemistry-climate models.\n \nWebinar info:\nWebinar thread: https://go.umd.edu/alexanderwebinar ( a )\nEvent site: https://go.umd.edu/alexander ( https://go.umd.edu/alexander )\nWebinar number:\nWebinar password: essic\nTo join the audio conference only:\nUS Toll: +1-415-655-0002\nGlobal call-in numbers ( https://umd.webex.com/umd/globalcallin.php?MTID=e492bfe8c2d628cca31b7c1f3b7185bcf )\n \nResources:\nFor IT assistance:\nCazzy Medley: cazzy@umd.edu ( mailto:cazzy@umd.edu )\nTravis Swaim: tswaim1@umd.edu ( mailto:tswaim1@umd.edu )\n \nSeminar schedule/archive: https://go.umd.edu/essicseminar ( https://go.umd.edu/essicseminar )\nSeminar recordings on Youtube: https://www.youtube.com/user/ESSICUMD ( https://www.youtube.com/user/ESSICUMD )\n
URL:https://essic.umd.edu/events/the-role-of-reactive-halogens-in-air-pollution-and-climate/
ORGANIZER;CN=John Xun Yang:MAILTO:jxyang@umd.edu
CATEGORIES:Fall 2020
LOCATION:UMD WebEx (9/28)
ATTACH;FMTTYPE=image/jpeg:https://essic.umd.edu/wp-content/uploads/2023/09/headshot_20200927_Alexander-1.jpg
END:VEVENT
END:VCALENDAR