ICARTT: COORDINATED ATMOSPHERIC CHEMISTRY CAMPAIGN OVER EASTERN NORTH AMERICA AND NORTH ATLANTIC IN SUMMER 2004

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ICARTT COORDINATED ATMOSPHERIC CHEMISTRY
CAMPAIGN OVER EASTERN NORTH AMERICA AND NORTH
ATLANTIC IN SUMMER 2004
International, multi-agency collaboration

• SCIENTIFIC OBJECTIVES
• Regional Air Quality characterize sources and
  transport of pollution in northeastern North
  America
• Continental Outflow quantify North American
  outflow of environmentally important gases and
  aerosols, relate to sources
• Transatlantic Pollution understand transport
  and chemical evolution of North American
  pollution across the Atlantic
• Aerosol Radiative Forcing characterize
  direct/indirect effects of aerosols over
  northeastern North America and western North
  Atlantic

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ICARTT THE PLAYERS
DLR, CNRS
NOAA/ ITCT
NASA/ INTEX
UK/ITOP
COBRA
MSC
Zoom over northeastern North America
NEAQS
Caltech/ ONR
DOE/ASP
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INTEX-NA/ICARTT DC-8 Activities Preliminary
Status
GOAL To improve understanding of the U.S.
sources, boundary layer processing, and
continental outflow of environmentally important
gases and aerosols
INTEX-NA DC-8 Flight 3 -- 11
Start date July 1, 2004 14 flights completed 5
more to go
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INTEX Flight 9 on 7/18

• Inter-comparison flights among multiple platforms
• Large-scale characterization of the troposphere
  across NA including sources
• Characterization of continental boundary layer
  chemistry and venting
• Large-scale continental outflow characterization
• Chemical aging over North Atlantic (ITCT)
• Convective venting to the upper troposphere
• Satellite validation flights

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DC-8 coordinated activities
4 7 3 2 1 2
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Some preliminary observations

• Asian influences across north America are far
  more pervasive than expected in the summer
• Large fires in Alaska (gone now) sometimes
  affecting midwest and east coast
• Anthropgenic pollution, smoke from fires, Asian
  and stratospheric influences coexist in the
  troposphere in stratified layers

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NOAA fire/smoke on July 18
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Visible fire smoke from the aircraft