Table 2: OMEGA observations and inferred mixing ratios in the northern hemisphere.

Orbit	Ls	Ps (mbar)	Airmass	CO (ppm)
N1(60N,350E)
1017-5	109.8	7.6	1.22	1210 +/- 510
1343-2	154.0	7.5	1.12	1330 +/- 530
N2(45N,110E)
1216-0	136.1	7.5	1.12	450 +/- 450
1238-2	139.1	7.5	1.12	450 +/- 450
1249-2	140.6	7.5	1.40	450 +/- 450