Is March 4th better than March 3rd...

The night was very, very clear so Michael got a full night of measurements from 10 PM until 6AM. It was the best night conditions-wise yet.

As the Sun rose, it was beautiful and clear on the horizon. We could see the mountains to the east for one of the first times during the campaign! It was -49 C at the station this morning and -40 C at the lab.

The good conditions lasted most of the day. Richard M., Keeyoon and Paul were able to measure for 7 hours starting at 9 AM. There was some thin cirrus which came up during the afternoon and got thicker later on. Richard M. and Paul were able to complete the full DA8 filter set.

MAESTRO and SPS split their time between making direct sun and zenith sky measurements throughout the day. This morning, there was some frost on the DOAS and SAOZ windows in the morning which Annemarie and I had to clean off. The frost was much worse at the end of the day and we cleaned it off a second time. This was because it was so cold outside (-40 C) and there were extra people in the lab (adding extra water vapour to the air). The instruments made their regular measurements through the day. Jennifer and Annemarie continued the data analysis for the SPS and DOAS. Tom spent some time working on the MAESTRO analysis.

After spending the morning at the weather station, the journalists from the Weather Network and CBC came back to AStrO/PEARL in the afternoon to do some more filming. Jim, Tom and I gave some interviews and they took more pictures of the instruments and the lab. Waub Rice, the reporter from the Weather Network, got to understand how cold it can be at Eureka when he tried to do some outdoor stand ups at -40 C and reasonably strong winds.

The flight taking Jim, Heather, the journalists and Tom back to Resolute left after dinner. After all of the excitement of having the journalists from CBC, Global and the Weather Network visiting Eureka, the team was rather tired this evening. There was lots of snoozing on the couch while we were watching our nightly movie.

The daily ozonesonde was launched with the synoptic radiosonde at 23:15 UTC. The Raven balloon did not take the sonde very high. It only got to 16.0 mbar and Richard M. came closest with a guess of 16.3 mbar.

Annemarie pointed out that the best day last year was Julian day 63. Because 2004 was a leap year, this was March 3rd and this year it was March 4th. So maybe our best day is Julian day 63...

Best regards,
Kaley.