A paper published today in Quaternary Research finds another non-hockey-stick in Tibet, and also finds an inverse relationship between temperature and lake levels on the Tibet plateau.
One of many simplistic memes is that "warmer means wetter," since warmer air can hold more water vapor, but this is only one side of the "equation." If warming causes both more evaporation and more precipitation, either of these could dominate to cause a net wetter or drier climate. In the case of this lake in Tibet, increased evaporation dominated over precipitation during warmer periods. According to the authors, the lake levels declined due to increased evaporation dominating during warm summers.
The paper joins hundreds of others demonstrating that the hydrological cycle is far more complex than assumed by model simulations, which are unable to directly or skillfully simulate the hydrological cycle/convection/evaporation/clouds/etc and instead rely upon fudge factor "parameterizations" for these critical aspects necessary to skillfully project climate change.
Looking at only one side of the equation and ignoring or not fully considering the opposing negative-feedbacks is unfortunately rampant in climate science, including the false assumption that radiative forcing dominates over negative-feedback convection in the troposphere, which in-turn has led to a gross exaggeration of greenhouse warming.