Today in Eureka the temperature was -45 °C with a wind chill of -50 °C. Near the PEARL Ridge Lab the temperature kept close to -35 °C. This afternoon we had four hours of clear weather. During this time, Joseph and Dan took 42 mid-infrared measurements with the Bruker. Debora took 25 PARIS measurements. She also took a couple of background measurements to optimize the Instrumental Line Shape analysis in the morning while it was cloudy.
Xiaoyi performed many UT-GBS resolution tests the UV-Vis lab today. These tests check the performance of the new optics system he installed. The PEARL-GBS has been working fine with its old suntracker PC. Pierre has been attempting to fix the UDP communication problem affecting the new PC. Meanwhile, PEARL-GBS continues to perform measurements in Zenith-sky/direct sun/MAX-DOAS combination mode. SAOZ continues to be in good shape.
Volodya was happy to find the SPS/MAESTRO/tracker laptop survived the night. This means there was something wrong with the other computer. This will be helpful to Emily and Paul, who will be running all PEARL instruments during the extended part of the campaign, as they will not have to reboot the computer every day. Volodya also moved Brewer 192 to the weather station. He plans to install it there tomorrow. The SPS, MAESTRO and the two PEARL Ridge Lab Brewers continue to operate normally.
Today at 0PAL, Emily conducted depolarization analysis and further improved the software. Chris, working remotely from Dalhousie, took measurements with the CRL lidar for 20 hours (midnight to 8 pm) across all channels. Emily and Chris also performed neutral density tests to further characterise the water vapour channel in the evening. Chris will re-start regular measurements once this is complete.
During a break in the afternoon, Volodya and Dan took a walk along a nearby ridge and took in the view of the surrounding Arctic beauty. See the daily photo album for a few of their favorite photographs!
Today's ACE ozonesonde flight occurred at 18:15 and reached an altitude of 30,355 m and 8.2 millibars.