The weekend came with great measurement conditions for the team. Both Saturday, March 7, and Sunday, March 8, were mainly clear with a few clouds on the horizon. The temperature at the Eureka Weather Station remained around -45°C the entire weekend with windchill temperatures falling below -60°C. Saturday came with moderately high winds which calmed down enough around mid-Sunday for the team to go on a short hike to the ridge to the west of PEARL. As the total time of sunlight has increased to around 9 hours the team is making good use of the favourable weather conditions.
Beatriz and Tyler were able to take solar measurements with both the Bruker 125HR and the EM27/SUN. They collected 99 mid infrared solar measurements with the Bruker 125HR on Saturday and 57 on Sunday across all seven spectral filters. With the EM27/SUN they collected around 1700 near infrared interferograms on Saturday and around 1000 on Sunday. They continued monitoring the data from the pressure sensor and are working on finding the best way to set up the SPH10 Vaisala static pressure head inside the dome to minimize the errors caused by wind.
Kristof and Ramina spent some time selecting a suitable azimuth angle for the Pandora MAX-DOAS measurements. They needed a direction with unobstructed line-of-sight down to the horizon, and in the end they settled on pointing the instrument towards the Eureka Weather Station. This way the profiles retrieved from the Pandora measurements will be easily comparable to measurements at 0PAL. During the rest of the weekend, Kristof and Ramina started processing the zenith sky measurements from both GBS instruments.
During the night from Friday, March 6, to Saturday, March 7, Ali collected measurements between 9 PM and 4:30 AM. There were minor fluctuations in the signal, but they shouldn't impact the results too much. During the night from Saturday to Sunday, Ali was able to make measurements throughout the night as conditions were good.
The CRL made 24 hours of measurements on March 7.
The SPS is operating nominally and with increasing NO2 amounts in the atmosphere the signal to noise ratio of the measurements improves yielding promising first results.
An ozonesonde was launched at 6:15 PM on Saturday, March 7, as well as on Sunday, March 8. They reached a final altitude of 19160 m (45.5 hPa) and 15242 m (90.2 hPa), respectively.
Happy International Women's Day!
Cheers,
Ellen Eckert
[on behalf of the 2020 Canadian Arctic ACE/OSIRIS Validation Campaign]
PS: Bonus content from Saturday on the Eureka Amateur Radio Club and the ARRL competition.