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“CHABLIS”

“CHABLIS”. Chemistry of the Antarctic Boundary Layer and the Interface with Snow. Aims of this meeting:. To remind ourselves what CHABLIS is all about! To pick up the thread and re-focus ourselves…. CHABLIS History (ie. how we got where we are today). Idea “born” post Neumayer season (1999)

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“CHABLIS”

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  1. “CHABLIS” Chemistry of the Antarctic Boundary Layer and the Interface with Snow

  2. Aims of this meeting: • To remind ourselves what CHABLIS is all about! • To pick up the thread and re-focus ourselves…

  3. CHABLIS History(ie. how we got where we are today) • Idea “born” post Neumayer season (1999) • University groups approached (Leeds, UEA, Bristol, IC) • Proposal submitted December 2000; funding announced May 2001 • CHABLIS commenced Oct 2001 • 2001/02 E.S. Shackleton didn’t arrive at Halley • Field work component delayed 1 year

  4. Three research foci: • Seasonal studies of oxidant chemistry in coastal Antarctica: • What is the annual climatology of radical precursors in the Antarctic troposphere? • Is there evidence for radical chemistry during the Antarctic winter period? • Can we balance the budget of tropospheric O3 during spring/summer?

  5. Three research foci… 2. Year round studies of the NOy budget in coastal Antarctica: • What controls the NOy budget throughout the year? • How does this affect tropospheric NOx and ice core nitrate?

  6. Three research foci… 3. Air/snow exchange mechanisms of trace gases : • What is the connection between snow and the boundary layer concentrations of key species? • What is driving the firn air profiles of halocarbons and alkyl nitrates?

  7. Target molecules

  8. Location: Halley, Antarctica

  9. Clean Air Sector Laboratory (CASLab)

  10. The Timescale • Phase 1: Summer 2003/04: Initial studies and install overwintering instruments • Phase 2: Winter 2004: Overwinter studies (NOy budget, air/snow exchange) • Phase 3: Summer 2004/05: Summer intensive (focus on oxidants)

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