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TZUNTIL:20131027T010000Z
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DTSTART:20101031T030000
TZOFFSETFROM:+0200
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RDATE:20111030T030000
RDATE:20121028T030000
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DTSTART:20110327T020000
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DTSTAMP:20260815T192652Z
DESCRIPTION:eingeladen von Andreas Held.\n \nLarge quantities of volatile o
 rganic compounds (VOC) enter theatmosphere. The annual production of VOC (
 600 -2000 TgC/a) likelyexceeds that of methane and CO (~500 TgC/a each). T
 ogether these gasesfuel tropospheric chemistry. Oxidation of VOC leads to 
 the formationof aerosol via complex organic chemistry in the gas and aeros
 ol phasethereby modulating the oxidation capacity of the atmosphere. It is
 currently believed that a large fraction of VOC originates frombiogenic so
 urces (e.g. >80%). The life cycle of organic carbon isultimately controlle
 d by emission and deposition processes at thesurface. Uncertainties in bud
 gets of VOC and potential ramificationsfor organic aerosol production in t
 he atmosphere will be discussedbased on a synthesis of direct VOC flux mea
 surements performed in arange of different ecosystems.  These direct flux 
 measurements will beused to address some outstanding questions concerning 
 (1) the amountof reactive biogenic organic aerosol precursors\, (2) the ma
 gnitude ofdeposition processes and (3) the lifetime of reactive biogenic o
 rganicaerosol precursors in the atmosphere.\n 
DTSTART;TZID=Europe/Berlin:20111027T170000
DTEND;TZID=Europe/Berlin:20111027T183000
SUMMARY:Dr. Thomas Karl\, National Center for Atmospheric Research\, Boulde
 r\, CO\, USA: Putting Constraints on the Life Cycle of Reactive Organic Ca
 rbon based on Ecosystem Scale Flux Measurements
TRANSP:TRANSPARENT
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