Figure S2.

Water column structure in Lake Vanda in 1960–1961 and in 2010–2011. 1960–1961 data [15] were offset vertically by 11 m to allow for the increase in lake level. 2010 data were obtained with a YSI 6600 Sonde (http://www.ysi.com) in November 2010. The identification of upper and lower isohaline and isothermal convection cells overlying a continuous density gradient is consistent with other published profiles of the water column [12].