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AGU: Geophysical Research Letters

 

Index Terms

  • Atmospheric Composition and Structure
  • Atmospheric Composition and Structure: Biosphere/atmosphere interactions
  • Atmospheric Composition and Structure: Constituent sources and sinks
  • Atmospheric Composition and Structure: Troposphere—composition and chemistry

Abstract

GEOPHYSICAL RESEARCH LETTERS, VOL. 28, NO. 19, PP. 3625-3628, 2001
doi:10.1029/2000GL012584

Unexpected high levels of NO observed at South Pole

D. Davis

Georgia Institute of Technology, Atlanta

J. B. Nowak

Georgia Institute of Technology, Atlanta

G. Chen

Georgia Institute of Technology, Atlanta

M. Buhr

Georgia Institute of Technology, Atlanta

R. Arimoto

New Mexico State University, Carlsbad

A. Hogan

Geochemical Science Division, Hanover, NH

F. Eisele

National Center of Atmospheric Research, Boulder, CO

L. Mauldin

National Center of Atmospheric Research, Boulder, CO

D. Tanner

National Center of Atmospheric Research, Boulder, CO

R. Shetter

National Center of Atmospheric Research, Boulder, CO

B. Lefer

National Center of Atmospheric Research, Boulder, CO

P. McMurry

University of Minnesota, Minneapolis

Reported here are the first Austral summer measurements of NO at South Pole (SP). They are unique in that the levels are one to two orders of magnitude higher (i.e., median, 225 pptv) than measured at other polar sites. The available evidence suggests that these elevated levels are the result of photodenitrification of the snowpack, in conjunction with a very thin atmospheric mixing depth. Important chemical consequences included finding the atmospheric oxidizing power at SP to be an order of magnitude higher than expected.

Received 8 November 2000; accepted 30 June 2001; .

Citation: Davis, D., et al. (2001), Unexpected high levels of NO observed at South Pole, Geophys. Res. Lett., 28(19), 3625–3628, doi:10.1029/2000GL012584.

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