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B iotic and A biotic S ulfur I mpacts on S tratocumulus (BASIS)

The Chilean aerosol-cloud-climate component of VOCALS. B iotic and A biotic S ulfur I mpacts on S tratocumulus (BASIS). Outline. Background Questions Method and tools Mean$..so far Who …so far. Camanchaca. South Eastern Pacific/Western South America….

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B iotic and A biotic S ulfur I mpacts on S tratocumulus (BASIS)

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  1. The Chilean aerosol-cloud-climate component of VOCALS Biotic and Abiotic Sulfur Impacts on Stratocumulus (BASIS) VOCALS lgk Ig'06

  2. Outline • Background • Questions • Method and tools • Mean$..so far • Who …so far Camanchaca VOCALS lgk Ig'06

  3. South Eastern Pacific/Western South America… • Active volcanoes (natural emissions) • Atacama: dryest desert of the world between the open Pacific and the heigh Andes (dust and circulations) • Intensive and long-term mining activities (anthropogenic emissions) • Humboldt current, upwelling and fishery (biogenic emissions, air-sea exchange and circulations) • Most persistent and extensive subtropical Sc deck of the SH (microphysics and energy balance) VOCALS lgk Ig'06

  4. Interestingly/Suspiciously enough… CDNC VOCALS plan/Wood et al 2005 VOCALS lgk Ig'06

  5. We know the continental SOx emissions VOCALS lgk Ig'06

  6. J J We know the circulation(s) Antofagasta, sounding station/long record Sounding campaigns Simulations VOCALS lgk Ig'06 Rutllant et al 2003; Huneeus, 2003

  7. We have identified strong easterly winds events (> 5m/s at 700 hPa), which… Average July 20-August 20 2000 vs July 26 2000 VOCALS lgk Ig'06 Huneeus et al, 2006

  8. The questions we want to address • Which are the emission strengths and distributions of natural and anthropogenic emissions of aerosols and precursors over the area? (Emphasis on sulfur) • Which is the regional distribution of these (sulfate) aerosols? Which is the relative contribution of anthropogenic and natural sources ? • Which aerosols are present and which become activated (CCN) in the coastal stratus deck (“camanchaca”)? • How (much) do the anthropogenic sulfate aerosols affect cloud properties off the coast from Chile? Has there been a trend in the CDNC signal? VOCALS lgk Ig'06

  9. …emission strengths/distribution … • Anthropogenic and volcanic: compile, order, check, extrapolate… • Biogenic:…parameterize…ROUGH estimate • …regional distribution and relative contributions.. • Dispersion modeling using re-analysis and downscaling • Compare with available observations • …which aerosols become CCN… • Measurement campaign: • activated aerosols at a camanchaca station (CVI+on-line analysis) • PM10/PM2.5 at the same site & PIXE analyses & ionchromatograph • SO2 continuosly • Sunphotometer(s) • Deploy passive samplers for N-S transect and seasonal changes • ..changes in reff, n, CDNC… • Regional climate model simulations • Trend analyses for satellite data How… VOCALS lgk Ig'06

  10. VOCALS lgk Ig'06

  11. Mean$...so far • Chilean Research Council/FONDECYT 2007 - 2010 (June 2006) • Logistics and analyses • Students/Research assistants • Publications • Traveling • Swedish Research Council (April/May 2007) • Visits and training • Logistics (some) • ECOS Sud collaboration agreement (C03U04) VOCALS lgk Ig'06

  12. Who so far? Chile • Ana María Córdova (CEAZA) • Laura Gallardo (CMM-U) • Manuel Leiva (CENMA) Sweden • Radovan Krejci (MISU) • Annica Ekman (MISU) France • Isabelle Chiapello • Jean-Francois Léon (LOA) VOCALS lgk Ig'06

  13. Chilean Air Force Open questions • Mean$??...Other sources? • Other participants and instruments? • More explicit combinations/coordinations with VOCALS?, e.g., LLJ study • The Chilean Air Force airplane? VOCALS lgk Ig'06

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