The average depth of the world's oceans is 3.8 km. Most of the deep ocean is at about 4 ° C, where the coefficient of thermal expansion of sea water is zero . However, the top kilometer of the oceans is at an average temperature of approximately 10 ° C, and this water has an average coefficient of thermal expansion of 0 . 00012/ ° C. Estimate how much the sea level would rise if the temperature of the top kilometer of the ocean increased by 1 ° C.