A less intense warm core appears over the Mendeleyev Ridge, and there is a general warming in the Makarov Basin centered near 200 m.
Besides the temperature maximum encountered over the Lomonosov Ridge, temperature maxima near 1 [degrees] C were observed at four places over the Chukchi boundary and Mendeleyev Ridge. This region has been visited so rarely in the past that it is difficult to know precisely the amount of the warming, but it is at least 0.2 [degrees] C.
Data collected during several cruises from 1991 to 1995 indicate that in the 1990s the boundary between these eastern and western halocline types shifted from a position roughly parallel to the Lomonosov Ridge to near alignment with the Alpha and Mendeleyev Ridges. The Atlantic Water temperature has also increased, and the cold halocline has become thinner.