. >> dr. meehl. >> thank you, chairman bair, members of the committee for the opportunity of have process on climate change, climate models and extreme model is the first of what we do with a personal perspective that i think is worth kind of stressing that i think one of the most interesting, exciting and challenging science problems, facing the research community today is the following. if you at greenhouse gases to the atmosphere, what does the response of the climate system? is because of this compelling science problems that i've been research in this area fascinating challenge and it's why i'm here today. the idea that additional co2 and other grasses -- gas is not a new of the so-called greenhouse effect has been studied since the late 1800s and the number of simple calculation performed indicated a doubling of co2 in the atmosphere it would likely won the planet by at least several degrees. however, a major development with the emergence of numerical models that can be run on computers. the

dr. lindzen. doctors meehl. >> thank you chairman baird and members of the committee for the opportunity to communicate information regarding process and and and the waltz with climate change climate models and extreme weather and climate events. verse i want to begin with a personal perspective that i think is worth kind of stressing. i think one of the most interesting and exciting and challenging science problems facing the research committee today is the following. if you add greenhouse gases to the atmosphere, what is the response of the climate system? it is because of this compelling science problems that i find research in this area fascinating and tremendous intellectual challenge and why i'm here today. so anyway the idea that additional co2 and other greenhouse gases would cause warming of the climate is not a new one. so-called greenhouse effect has been studied since the late 1800's and a number of simple calculations performed over their early 20s entry indicating a doubling of co2 would likely wa