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).

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