If it is not the clouds, it is the Moon...

The clouds eventually cleared up overnight so that Richard B. could make some lidar measurements. Unfortunately, by the time the sky overhead was clear, there was enough light from the almost full Moon to degrade the observations.

While the clouds had cleared overhead, there was bank of cloud on the horizon that got thicker toward the east. The Sun rose behind the clouds providing a beautiful sunrise but no measurement opportunities.

At about 12:45 pm, enough of the Sun came out from behind the thick clouds that it could be tracked. There was much activity as the FTS team got set up to measure and Clive and Hongjiang commanded the tracker to make both solar and zenith sky measurements. In the end, only one measurement was made by each of the DA8 and PARIS instruments before the Sun dropped back into the thick cloud.

We have four more days in Eureka and now are beginning to worry about the logistics of getting everything and everyone back down south. Richard M. and Tobias will be leaving on Sunday the 7th with some of the Weather Station staff who are finished their tours of duty. Clive and I are packing up all of our extra equipment to send down on the 7th. We hope that then we can fit all of the remaining freight and people on to the charter on the 9th.

The daily ozonesonde/radiosonde flight was launched at 23:15 UTC by Chris and Andre. They used a Raven balloon which quite looked spectacular in the twilight/moonlight as it ascended. The sondes reached 7.0 mbar (31.4 km). Andre typically guesses 4.9 mbar for the maximum height of the sonde. This time he changed his value to 6.6 mbar and won the contest!

Best regards,
Kaley.