Jennifer Kosty (Yale University)

October 7, 2025
17:00 local, 77.10◦N, 142.09◦W

Conditions:

• Cloudy
• 100% sea ice cover
• -11^◦C
• Sunrise: 7-Oct-2025 10:45
• Sunset: 7-Oct-2025 19:45
• Day length: 9 hours, 0 minutes

Early this morning, the night watch completed a 3750 m CTD rosette cast at CB-16. We then continued our search for a large, multi-year ice floe in the areas near CB-13 and CB-15. We were once again disappointed to discover that most of the floes in this region consist primarily of thin, first-year ice, which is unsuitable for our planned ice station. We pivoted from our plans to complete the ice station today and, instead, decided to wrap up the last few science stations in this area.

After a quick lunch of hamburgers, fries, and veggies, the day watch completed a CTD rosette cast at CB-13. This was another deep cast (3780 m), so the rosette entered the water around 1 pm and was back on deck by 4 pm. We then spent the next hour sampling, before going to enjoy a dinner of roasted pork loin, potatoes, wild rice, and Thai chicken/cauliflower bites. Huge thanks to the cooks (Raymond Lockyer, Cory Simms, Allison Lodge, and Carter Guy) who prepare three amazing, diverse meals for us every day! The menu for each meal is always a big topic of conservation amongst the science team, especially during long CTD rosette casts.

We are currently headed towards CB-15, where the watches will complete another CTD rosette cast tonight. We remain hopeful that we will find a good ice floe in the next few days as we continue to transit towards the southeast, where there is a greater concentration of old ice.