Table 1 Sampling dates and time in Universal Coordinated Time (UTC), latitudes and longitudes and surface values for photosynthetically available radiation (Surface PAR; μmol photons m−2 sec−1) at the time of sampling. UTC apparent sunrise and sunset calculated using the NOAA ESRL. calculator.http://www.srrb.noaa.gov/highlights/sunrise/sunrise.html. Data not available (n/a)

From: Archaeal amoA and ureC genes and their transcriptional activity in the Arctic Ocean

Station

UTC Date-Time

Latitude

Longitude

UTC sunrise

UTC sunset

Surface PAR

Northern Baffin Bay

129

11/09/06 05:17

78° 19.75

74° 00.84

09:07

00:36

1.74

123

13/09/06 12:55

77° 20.55

74° 38.44

09:30

0:14

74.71

109

17/09/06 14:19

76° 15.28

74° 10.39

10:00

23:38

369.50

Lancaster Sound

301

20/09/06 23:03

74° 7.44

83° 20.69

11:00

23:51

46.92

Amundsen Gulf

D14

08/01/08 14:05

71° 31.58

125° 35.76

never

n/a

0

D29

10/03/08 17:26

71° 2.31

123° 54.65

20:30

01:58

0

D36

09/04/08 17:31

71° 18.43

124° 34.32

12:32

04:11

n/a