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Halogen atom concentrations in the Arctic Troposphere derived from hydrocarbon measurements: Impact on the budget of formaldehyde
Author(s) -
Rudolph Jochen,
Ru Fu Ban,
Thompson Alex,
Anlauf Kurt,
Bottenheim Jan
Publication year - 1999
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 - 10.1029/1999gl010869
Subject(s) - formaldehyde , sunrise , halogen , troposphere , ozone , bromine , ozone depletion , chlorine , arctic , polar , mixing ratio , photochemistry , chemistry , radical , atmospheric chemistry , atmospheric sciences , environmental chemistry , atom (system on chip) , meteorology , geology , organic chemistry , oceanography , physics , astronomy , computer science , embedded system , alkyl
As part of the Polar Sunrise Experiment in 1998 measurements of hydrocarbons were made at the Canadian Arctic station Alert. Halogen atom concentrations play a key role in determining formaldehyde mixing ratios. Formaldehyde mixing ratios observed during ozone depletion episodes agree with those calculated from time integrated halogen atom concentrations. Formaldehyde is the most important loss mechanism for active bromine and at the same time an important source for HO x radicals. Via these reactions formaldehyde will indirectly influence chlorine chemistry and thus feedback mechanisms involving halogen atom concentrations and formaldehyde are likely to play a major role in the development of tropospheric ozone depletion episodes during polar sunrise.