Table 4 Correction factors.

From: Year-round trace gas measurements in the central Arctic during the MOSAiC expedition

Trace gas

Sampling location

October to February

March to June

July to September

slope

intercept

slope

intercept

slope

intercept

CH4

Swiss container

0.9767

45.2709

1.0062

−12.6131

1.0240

−47.2318

CU container

1.0095

−10.7082

1.0712

−132.0740

0.9407

122.5348

Met City

0.9856

31.3075

0.9856

31.3075

0.9856

31.3075

CO2

Swiss container

1.0333

−13.4394

0.9753

10.1641

0.9364

25.2725

CU container

0.9957

−0.0138

1.0993

−43.8172

0.9696

9.8459

Met City

0.9943

0.07443

0.9943

0.07443

0.9943

0.07443

O3

Swiss container

0.6343

7.6929

0.7455

1.2322

0.6581

4.2044

CU container

0.8217

4.1540

0.9185

0.6376

0.7865

4.8725

  1. Correction factors (slope and intercept) applied to CO2, CH4, and O3 measurements in the CU and Swiss containers and at Met City. Weekly discrete samples collected for post-cruise analysis at NOAA GML are used as calibration reference for CO2, and CH4 measurements while ARM measurements are used as calibration reference for O3 measurements. The intercept is given in ppb for CH4 and O3, and in ppm for CO2.
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