BEGIN:VCALENDAR PRODID:-//Microsoft Corporation//Outlook 16.0 MIMEDIR//EN VERSION:2.0 METHOD:REQUEST X-MS-OLK-FORCEINSPECTOROPEN:TRUE BEGIN:VTIMEZONE TZID:Pacific Standard Time BEGIN:STANDARD DTSTART:16011104T020000 RRULE:FREQ=YEARLY;BYDAY=1SU;BYMONTH=11 TZOFFSETFROM:-0700 TZOFFSETTO:-0800 END:STANDARD BEGIN:DAYLIGHT DTSTART:16010311T020000 RRULE:FREQ=YEARLY;BYDAY=2SU;BYMONTH=3 TZOFFSETFROM:-0800 TZOFFSETTO:-0700 END:DAYLIGHT END:VTIMEZONE BEGIN:VEVENT ATTENDEE;CN="ARB (RD) ALL OF RESEARCH DIVISION";RSVP=FALSE:mailto:310@arb.c a.gov ATTENDEE;CN=slee@aqmd.gov;RSVP=FALSE:mailto:slee@aqmd.gov ATTENDEE;CN="Franco, Guido@Energy";RSVP=FALSE:mailto:Guido.Franco@energy.ca .gov ATTENDEE;CN="Wilhelm, Susan@Energy";RSVP=FALSE:mailto:susan.wilhelm@energy. ca.gov ATTENDEE;CN=pye.havala@epamail.epa.gov;RSVP=FALSE:mailto:pye.havala@epamail .epa.gov ATTENDEE;CN=Eyth.Alison@epa.gov;RSVP=FALSE:mailto:Eyth.Alison@epa.gov ATTENDEE;CN="Lynn Russell [lmrussell@ucsd.edu]";ROLE=OPT-PARTICIPANT;RSVP=F ALSE:mailto:lmrussell@ucsd.edu ATTENDEE;CN="Chris Cappa";ROLE=OPT-PARTICIPANT;RSVP=FALSE:mailto:cdcappa@uc davis.edu ATTENDEE;CN=mjkleeman@ucdavis.edu;ROLE=OPT-PARTICIPANT;RSVP=FALSE:mailto:mj kleeman@ucdavis.edu ATTENDEE;CN=jacobson@stanford.edu;ROLE=OPT-PARTICIPANT;RSVP=FALSE:mailto:ja cobson@stanford.edu CLASS:PUBLIC CREATED:20190729T203157Z DESCRIPTION:Please save the date for a research seminar on Characterizing t he Climate Impacts of Brown Carbon . \n\n \n\n \n\nLynn Russell\, Christopher Cappa\, and Michael Kleeman\, w ill provide an overview of the project and present the research findings. Presentation materials and remote participation information will be posted closer to the event here: https://ww3.arb.ca.gov/research/seminars/semina rs.htm .\n\n \n\nIn-Person Participation:\n\ nThe seminar will take place in the Sierra Hearing Room located on the sec ond floor of CalEPA Headquarters (1001 I Street\, Sacramento\, 95812). Pl ease arrive a few minutes early to allow time to be checked in at the Visi tor’s Center.\n\n \n\nResearch Overview:\n\n \n\nBrown carbon (BrC) emis sions from residential\, agricultural\, and wildfire burning activities ar e a highly seasonal\, episodic\, and poorly characterized fraction of fine particulate matter (PM2.5) in California. In addition\, secondary formati on of additional carbonaceous particle mass in urban areas may contribute even more light-absorbing BrC year round. These types of BrC may have subs tantial impacts on climate in California and worldwide. Through a multi-in stitution collaboration\, this study identified and characterized the cont ribution of BrC to climate forcing in California by (1) providing PM1 and PM2.5 physical measurements and chemical analyses of fine particles that c onstrain the chemical concentrations and optical properties of burning emi ssions\, (2) quantifying the BrC organic components and the multi-waveleng th absorption from burning emissions and from atmospheric formation of sec ondary components at two California locations\, and (3) examining the glob ally and regionally-averaged climate response of BrC. We looked at areas w ith significant residential burning in the San Joaquin Valley (Fresno) and with photochemical aerosol formation in the South Coast Air Basin (Fontan a) to characterize their different mixes of emission sources and seasonali ty. The advanced cavity ring-down/photoacoustic and mass spectrometric ins trumentation used for these measurements provided unprecedented chemical c omposition and optical property (e.g. multi wavelength absorption and exti nction) characterization of BrC. The quantitative analysis of these result s separated and characterized BrC\, providing important quantification of emissions-specific particle absorption properties for modeling climate for cing. These results were used to evaluate column measurements of absorptio n partitioning\, showing good agreement when surface conditions were repre sentative of the boundary layer and column. Global and regional models wer e then used with the realistic quantification of organic particles and the ir absorption. The results\, averaged over one year (2014-2015)\, of the g lobal through regional nested simulations indicate that absorption by BrC in aerosol particles and clouds increased domain-averaged near surface air temperatures by ~0.018 degree Kelvin (K)\, whereas absorption by organic matter plus black carbon (BC) increased it by ~0.17 K\, suggesting a warmi ng by BC of ~0.15 K. The combination of the source-oriented regional model ing and global plus regional modeling showed that diesel engines make a la rger contribution than biomass burning to total-column absorption in Calif ornia.\n\n \n\nFor information on this seminar\, please contact:\nNehzat M otallebi at (916) 324-1744 or send email to: Nehzat.Motallebi@arb.ca.gov < mailto:Nehzat.Motallebi@arb.ca.gov> \nFor information on this Series\, ple ase contact:\nReid Brown at (916) 323-1522 or send email to: Reid.Brown@ar b.ca.gov \n\n \n\n\n\nReid Brown\n\nResearc h Division \n\nAdministrative Section\n\n916-323-1522\n\nreid.brown@arb.ca .gov \n\n \n\n \n\n DTEND;TZID="Pacific Standard Time":20190819T150000 DTSTAMP:20190729T201549Z DTSTART;TZID="Pacific Standard Time":20190819T133000 LAST-MODIFIED:20190729T203157Z LOCATION:Monday\, August 19\, 2019\, 1:30 p.m. Sierra Hearing Room\, Second Floor\, Cal EPA Headquarters\, 1001 "I" Street\, Sacramento\, CA ORGANIZER;CN="Brown, Reid@ARB":mailto:reid.brown@arb.ca.gov PRIORITY:5 SEQUENCE:0 SUMMARY;LANGUAGE=en-us:CARB Research Seminar - Contract No. 13-330: Charact erizing the Climate Impacts of Brown Carbon TRANSP:OPAQUE UID:040000008200E00074C5B7101A82E00800000000807931A30F46D501000000000000000 010000000E52B5393CC749843A3FDBEA83E30328E X-ALT-DESC;FMTTYPE=text/html:

Please sav e the date for a research seminar on Characterizing the Climate Impacts of Brown Ca rbon.

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Lynn Russell\, Christopher Cappa\, and Mic hael Kleeman\, will provide an overview of the project and present the res earch findings. Presentation materials and remote participation informatio n will be posted closer to the event here: https://ww3.arb.ca.gov/research/seminars/seminars.ht m.

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In-Person Participation:

The seminar will take place in the Sierra Hearing R oom located on the second floor of CalEPA Headquarters (1001 I Street\, Sa cramento\, 95812). \; Please arrive a few m inutes early to allow time to be checked in at the Visitor’\;s Center .

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Research Overview:

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Brown carb on (BrC) emissions from residential\, agricultural\, and wildfire burning activities are a highly seasonal\, episodic\, and poorly characterized fra ction of fine particulate matter (PM2.5) in California. In addition\, seco ndary formation of additional carbonaceous particle mass in urban areas ma y contribute even more light-absorbing BrC year round. These types of BrC may have substantial impacts on climate in California and worldwide. Throu gh a multi-institution collaboration\, this study identified and character ized the contribution of BrC to climate forcing in California by (1) provi ding PM1 and PM2.5 physical measurements and chemical analyses of fine par ticles that constrain the chemical concentrations and optical properties o f burning emissions\, (2) quantifying the BrC organic components and the m ulti-wavelength absorption from burning emissions and from atmospheric for mation of secondary components at two California locations\, and (3) exami ning the globally and regionally-averaged climate response of BrC. We look ed at areas with significant residential burning in the San Joaquin Valley (Fresno) and with photochemical aerosol formation in the South Coast Air Basin (Fontana) to characterize their different mixes of emission sources and seasonality. The advanced cavity ring-down/photoacoustic and mass spec trometric instrumentation used for these measurements provided unprecedent ed chemical composition and optical property (e.g. multi wavelength absorp tion and extinction) characterization of BrC. The quantitative analysis of these results separated and characterized BrC\, providing important quant ification of emissions-specific particle absorption properties for modelin g climate forcing. These results were used to evaluate column measurements of absorption partitioning\, showing good agreement when surface conditio ns were representative of the boundary layer and column. Global and region al models were then used with the realistic quantification of organic part icles and their absorption. The results\, averaged over one year (2014-201 5)\, of the global through regional nested simulations indicate that absor ption by BrC in aerosol particles and clouds increased domain-averaged nea r surface air temperatures by ~0.018 degree Kelvin (K)\, whereas absorptio n by organic matter plus black carbon (BC) increased it by ~0.17 K\, sugge sting a warming by BC of ~0.15 K. The combination of the source-oriented r egional modeling and global plus regional modeling showed that diesel engi nes make a larger contribution than biomass burning to total-column absorp tion in California.

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For information on this seminar\, please contact:
Nehzat Motalleb i at (916) 324-1744 or send email to: \;Nehzat.Motallebi@arb.ca.gov
For information on this Series\, please contact:
Reid Brown at (916) 323-1522 or send email to:  \;Reid.Brown@arb.ca.gov

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Reid Brown

Research Division

Administrative Section

916-323-1522< /p>

reid.brown@arb.ca.gov

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