Snowpack photochemical production of HONO

A major source of OH in the Arctic boundary layer in springtime

Xianliang Zhou, Harald J. Beine, Richard E. Honrath, Jose Fuentes, William Simpson, Paul B. Shepson, Jan W. Bottenheim

Research output: Contribution to journalArticle

187 Citations (Scopus)

Abstract

Both snow manipulation experiments and ambient measurements during the Polar Sunrise Experiment 2000 at Alert (Alert2000) indicate intensive photochemical production of nitrous acid (HONO) in the snowpack. This process constitutes a major HONO source for the overlying atmospheric boundary layer in the Arctic during the springtime, and sustained concentrations of HONO high enough that upon photolysis they became the dominant hydroxyl radical (OH) source. This implies a much greater role for OH radicals in Arctic polar sunrise chemistry than previously believed. Although the observations were made in the high Arctic, this finding has a significant implication for the boundary layer atmospheric chemistry in Antarctica during sunlit seasons and in the mid to high latitudes of the Northern Hemisphere during the winter and spring seasons when approximately 50% of the land mass may be covered by snow.

Original languageEnglish (US)
Pages (from-to)4087-4090
Number of pages4
JournalGeophysical Research Letters
Volume28
Issue number21
DOIs
StatePublished - Nov 1 2001

Fingerprint

sunrise
snow
snowpack
boundary layers
boundary layer
nitrous acid
atmospheric boundary layer
atmospheric chemistry
spring (season)
hydroxyl radicals
Antarctic regions
Northern Hemisphere
hydroxyl radical
photolysis
polar regions
winter
manipulators
experiment
chemistry
acid

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Earth and Planetary Sciences(all)

Cite this

Zhou, Xianliang ; Beine, Harald J. ; Honrath, Richard E. ; Fuentes, Jose ; Simpson, William ; Shepson, Paul B. ; Bottenheim, Jan W. / Snowpack photochemical production of HONO : A major source of OH in the Arctic boundary layer in springtime. In: Geophysical Research Letters. 2001 ; Vol. 28, No. 21. pp. 4087-4090.
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abstract = "Both snow manipulation experiments and ambient measurements during the Polar Sunrise Experiment 2000 at Alert (Alert2000) indicate intensive photochemical production of nitrous acid (HONO) in the snowpack. This process constitutes a major HONO source for the overlying atmospheric boundary layer in the Arctic during the springtime, and sustained concentrations of HONO high enough that upon photolysis they became the dominant hydroxyl radical (OH) source. This implies a much greater role for OH radicals in Arctic polar sunrise chemistry than previously believed. Although the observations were made in the high Arctic, this finding has a significant implication for the boundary layer atmospheric chemistry in Antarctica during sunlit seasons and in the mid to high latitudes of the Northern Hemisphere during the winter and spring seasons when approximately 50{\%} of the land mass may be covered by snow.",
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Snowpack photochemical production of HONO : A major source of OH in the Arctic boundary layer in springtime. / Zhou, Xianliang; Beine, Harald J.; Honrath, Richard E.; Fuentes, Jose; Simpson, William; Shepson, Paul B.; Bottenheim, Jan W.

In: Geophysical Research Letters, Vol. 28, No. 21, 01.11.2001, p. 4087-4090.

Research output: Contribution to journalArticle

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T2 - A major source of OH in the Arctic boundary layer in springtime

AU - Zhou, Xianliang

AU - Beine, Harald J.

AU - Honrath, Richard E.

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AB - Both snow manipulation experiments and ambient measurements during the Polar Sunrise Experiment 2000 at Alert (Alert2000) indicate intensive photochemical production of nitrous acid (HONO) in the snowpack. This process constitutes a major HONO source for the overlying atmospheric boundary layer in the Arctic during the springtime, and sustained concentrations of HONO high enough that upon photolysis they became the dominant hydroxyl radical (OH) source. This implies a much greater role for OH radicals in Arctic polar sunrise chemistry than previously believed. Although the observations were made in the high Arctic, this finding has a significant implication for the boundary layer atmospheric chemistry in Antarctica during sunlit seasons and in the mid to high latitudes of the Northern Hemisphere during the winter and spring seasons when approximately 50% of the land mass may be covered by snow.

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