The Drowned World By
J.G. Ballard 
 
It is sometime soon in the 21st Century. Fluctuations in solar radiation have caused the Earth's ice-caps to melt and the sees to rise. London is a city turned swamp. Dr. Robert Kerans and his expedition leave what remains of civilzed life in the Arctic and Antarctic Circles to log the flora and fauna of this new Triassic age.