Arctic Atmospheric Chemistry: the Polar Sunrise Experiments (PSE) W. Bottenheim 1 , Paul B. Shepson 2 , Jose D. Fuentes 3 , Leonard A. Bar eteorological Service of Canada, Toronto, ON, Canada urdue University, West Lafayette, IN, USA niversity of Virginia, Charlottesville, VA, USA MO, Geneva, Switzerland
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Arctic Atmospheric Chemistry: the Polar Sunrise Experiments (PSE) Jan W. Bottenheim 1, Paul B. Shepson 2, Jose D. Fuentes 3, Leonard A. Barrie 4 1 Meteorological.
Relationship between ozone and bromine From: Barrie et al., 1988
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Arctic Atmospheric Chemistry: the Polar Sunrise Experiments (PSE)
Jan W. Bottenheim1, Paul B. Shepson2, Jose D. Fuentes3, Leonard A. Barrie4
1Meteorological Service of Canada, Toronto, ON, Canada2Purdue University, West Lafayette, IN, USA3University of Virginia, Charlottesville, VA, USA4WMO, Geneva, Switzerland
Chronology of PSEs:
1988: first PSE
1992, 2000: major campaigns
Yearly small, dedicated campaigns
Relationship between ozone and bromine
From: Barrie et al., 1988
Br + O3 -> BrO + O2
BrO + BrO-> 2 Br + O2
223 2 HOBrOkBrOk
dtOd
BrO + BrO limiting
BrO + HO2 -> HOBr
HOBr + Br- -> 2 Br
From: Foster et al., 2001
From: Hoenninger and Platt, 2002
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ppbv
Seibert et al. Analysis - Alert - O3 (ppbv)00, 12 UTC - 240 Hours
1989 - 2000 : January - February
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ppbv
Seibert et al. Analysis - Alert - O3 (ppbv)00, 12 UTC - 240 Hours
1989 - 2000 : March - April
From: Richter et al., 1998
GOME satellite data
Frequency of depletion episodes is increasing (0.7 % y-1),evidence of climate change?
Most episodes occur where surface temperature is < -20 0C
Frost flower growth is efficient over new sea-ice, at a rate inversely proportional to temperature