In reply to elliptic:
For the Helvellyn system, we have decided to trial different turf depths for the turf sensors following user feedback from Great End and Idwal, going for 5cm/10cm/15cm instead of 5cm/15cm/30cm used at the other sites. The main thinking behind this is that turf is only likely to freeze to 30cm in extended periods of exceptionally cold weather, when almost everything is likely to be frozen solid. Given that the main focus of the project is informing climbers about marginal conditions temperature readings at shallower depths could be more useful in assessing conditions, or they could just provide three very similar readings. This remains to be seen, but we will compare the two systems over the winter and review in the spring – if needed we can change either site in the future if one setup proves more useful than the other.
Cheers
Rob
Post edited at 16:30