Day 8 of the ACE/OSIRIS sunrise validation campaign. Today we said goodbye to Tom McElroy and PEARL operator John Gallagher. But, we also said hello to his replacement Andrew Hall Andrew Hall

After a stormy weekend the weather has finally calmed down. There are still some clouds in the sky but the team is hoping for improved conditions later this week to make solar measurements. #cdnsci #PEARL2020

Ramina and Kristof are clearing the GBS dome of snow in the morning #cdnsci #PEARL2020

Pierre, Tyler and Beatriz discussing the placing of the pressure sensor inlet for the Bruker 125HR #cdnsci #PEARL2020

After fixing the PEARL-GBS suntracker, Ramina and Kristof put the dome back on with Pierre's help - a very successful day for the GBS team #cdnsci #PEARL2020

Frosty Ramina on the roof at PEARL RidgeLab

Visitors at the Ridge Lab: SPM Scott, SPM in training Andrew, MetTech Cole from the Eureka Weather Station #cdnsci #PEARL2020

Thanks to ice crystals in the otherwise clear sky, the team got to see some beautiful sun dogs on their way up to the Ridge Lab today #cdnsci #PEARL2020 (Photo: Ramina Alwarda)

On International Women's Day we salute these awesome women in Eureka! From left to right, Flora, Ramina, Beatriz, and Ellen.

Ramina and Kristof cleaning the PEARL-GBS dome in preparation for measurements #cdnsci #PEARL2020

Side-by-side near-infrared measurements with the Bruker 125HR and the EM27/SUN #cdnsci #PEARL2020

Beatriz and Tyler re-installing the EM27/SUN cover #cdnsci #PEARL2020

It's the end of the intensive phase of the ACE/OSIRIS Sunrise validation campaign. Our top-notch team of students and post-docs is heading home!

On the last evening of the intensive phase of the campaign a pack of wolves passed through the station #cdnsci #PEARL2020

Expected and observed post-lockdown levels of nitrogen dioxide (NO2) #airquality over Canadian locations using the European Space Agency European Space Agency TROPOMI satellite instrument for the period Mar 16 to Apr 30 from Environment and Climate Change Canada ECCC SciTech. S. Ontario:

A short movie from #MOPITT PI Prof. James Drummond on global carbon monoxide (CO) distribution features Australian forest fires: youtu.be/gKsxz42MORw University of Toronto @DalPhysAtmosSci CANDAC-PEARL

Ozone layer: Concern grows over threat from replacement chemicals bbc.com/news/science-e…

npr.org/sections/healt…

Please check out this exciting new publication on Bromine Monoxide research at PEARL by University of Toronto Ph.D candidate Kristof Bognar agupubs.onlinelibrary.wiley.com/doi/10.1029/20… #pearl #cdnsci

We'd like to draw your attention to another PEARL related study. Dr. Erik Lutsch recently published his research on wildfire pollution in the Arctic and northern midlatitudes acp.copernicus.org/articles/20/12… #pearl #cdnsci