The overall objective for the NORTH project is: to assess the fundamental structure and operation of the Atlantic thermohaline circulation’s northern limb and thus constrain its mean state, variance, and sensitivity related to ob- served and projected climate change, including possible feedbacks.
Figure 1 The Arctic Mediterranean (background map from ibcao.org) and
Atlantic inflow (red arrow) is warm and saline, polar outflow (blue) is fresh and cold, and the over- flows (black) are dense and cold.
For figure 1 and 2 (under) the climatology is based on Nilsen et al. (2008). EGC – East Greenland Current; DS – Denmark Strait; IFR – Iceland-Faroe Ridge; FSC – Faroe-Shetland Channel.
Figure 2. The hydrography of northern THC at its gateway, the Greenland-Scotland Ridge. The mean exchange across the ridge, and the hydrographic contrasts and buoyancy forcing associated are schematically indicated.