Infrastructure and additional site information:
ICOS Östergarnsholm welcomes individual researchers and research groups to come to our measurement site and use existing infrastructure for their own measurements and collaborations. Regardless if it is a research visit with placement of equipment on our measurement tower, hut or in the form of ship-based measurements passing by our site we welcome you and will do our best to accommodate your needs.
The measurement site is about 4 km from the eastern coast of Gotland located on Östergarnsholm which is a small, flat island which stretches about 2 km in a W-E and N-S direction respectively. The maximum depth of the sea within 1 km radius is about 30 m. The station location in WGS84 coordinates (Latitude, Longitude) are:
30 m tower: 57.43010 N, 18.98415 E
SAMI and Seabird sensor: 57.42333 N, 18.99450 E
Wave buoy (operated by FMI): 57.41667 N, 19.05333 E
Östergarnsholm is a remote island reachable by boat from Gotland run by local citizen on contract with Uppsala University. The site is usually visited about every second month for maintenance if weather and ocean conditions are permitting this. The buoy sensors are typically exchanged twice per year with factory calibrated instruments. There is no ice cover on the site, however the harbor in Herrvik on the east coast of Gotland, where the boat is starting from, can freeze in the wintertime making the site seasonally difficult to access. The typical annual atmospheric temperature range is from -20oC to +20oC on the site.
There is no grid power on Östergarnsholm but the site has its own power supply consisting of wind turbines, solar panels and a backup diesel generator owned by Uppsala University and monitored by an external company. It is an autonomous system delivering 12 V, 24 V and 230 V. The total electricity capacity available on the site is about 2.5kW (in operation since November 2016). The diesel generator is placed approximately 400 m north from the measurement tower (close to the old harbor) to minimize influence on the measurements.
There is a small unheated measurement hut shared by Uppsala University, Stockholm University and visitors with an available space of approximately 6.5 m2. For temporary storage there is also some limited space inside a stainless-steel shipping container used for a large battery bank as part of the power supply system. There is data connection in the form of 3G modem on the site. There is no motor vehicles on the island. There is a cart to pull equipment from the harbor to the site.