Ground‐based FTIR measurements of CLONO 2  Vertical column amounts in the Arctic | Zendy

Notholt J. | Zendy; Clarmann T.V. | Zendy; Adrian G. P. | Zendy; Schrems O. | Zendy

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Ground‐based FTIR measurements of CLONO 2 Vertical column amounts in the Arctic

Author(s) -

Notholt J.,

Clarmann T.V.,

Adrian G. P.,

Schrems O.

Publication year - 1994

Publication title -

geophysical research letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.007

H-Index - 273

eISSN - 1944-8007

pISSN - 0094-8276

DOI - 10.1029/93gl01785

Subject(s) - stratosphere , polar vortex , zenith , middle latitudes , atmospheric sciences , arctic , atmosphere (unit) , polar , environmental science , analytical chemistry (journal) , geology , meteorology , physics , chemistry , geodesy , environmental chemistry , oceanography , astronomy

During the EASOE campaign measurements have been performed in March at Ny‐Ålesund (79°N, 11°E) by high resolution FTIR spectroscopy to derive the vertical column amounts of ClONO 2 . For the first part of this period the polar vortex was found to be situated above Ny‐Ålesund. The measurements give ClONO 2 zenith column amounts of about 3.9×10 15 mol cm −2 outside the polar vortex, much higher than midlatitude values for an undisturbed atmosphere. Inside the vortex strong variabilities with burdens between 2.8 and 6.8×10 15 mol cm −2 were observed. These high values might be explained by the reaction of ClO with NO 2 and the relatively warm stratosphere ensuring that the ClONO 2 so formed remains in the gas phase.

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