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Five years of CO, HCN, C<sub>2</sub>H<sub>6</sub>, C<sub>2</sub>H<sub>2</sub>, CH<sub>3</sub>OH, HCOOH and H<sub>2</sub>CO total columns measured in the Canadian high Arctic

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Figure 1. Microwindows used in the retrievals of CO, HCN, C 2 H 6 and C 2 H 2 , with examples of clear and polluted conditions in blue and red, respectively.
Figure 2. Microwindows used in the retrievals of CH 3 OH, HCOOH and H 2 CO, with examples of clear and polluted conditions in blue and red, respectively.
Table 2. Parameters (microwindows, interfering species, a priori VMR sources, standard deviations – SD – of the a priori covariance matrix and signal-to-noise ratios – SNR) used in the retrievals of the seven target gases.
Figure 3. The CO a priori VMR profile from WACCM v6 in black (upper panel). The black error bars represent the standard deviation of the a priori covariance matrix used in the retrievals at each layer
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