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<br />.Lv;:)v <br /> <br />I <br /> <br />whereas in the west, over here centered in <br />Utah, the temperatures were running about <br />two degrees cooler than normal. Now this <br />is related to a certain regime, if you will, <br />a certain trend in upper atmosphere physics <br />and it will show up in terms of changes of <br />temperature at the surface of the earth. <br /> <br />This, on the other hand, is a graph for <br />the period 1954, '55, '56 and '57. It is also <br />temperatures for January and you see that the <br />thing is quite opposite. Over here, where in <br />the other period it was colder than normal, <br />it is qctually warmer than normal, the aver- <br />age temperature is four degrees warmer, whereas <br />on the east coast the temperatures run about <br />one to two degrees colder than normal. Now <br />these represent very drastic changes in the <br />general weather regime. The causes of these <br />changes today are almost completely unknoiVTI <br />but the second phase of the study and the <br />first phase of the study will allow us to know <br />how trends in surface data like temperature <br />and pressure are related to the trends in the <br />river flow. <br /> <br />I <br /> <br />The third part of the study, which will <br />be undertaken by the High Altitude Observa- <br />tory at the University of Colorado, will be <br />a basic research effort to attempt to relate <br />these trends to trends in a very, very high <br />atmosphere. This becomes a speculative por- <br />tion of the research, if you will. We are <br />attempting in this part of the study, not to <br />relate historical records to stream flows, <br />but to try to figure out what is the proba- <br />bility that the future history of stream flow <br />will be completely different from anything <br />that lies within our actual experience - any- <br />thing that lies within the experience of any <br />given weather station in the area. The weather <br />stations, if I remember right, go back about <br />seventy years, seventy years in the extreme. <br />This will perhaps allow us to tell whether the <br />coming seventy years or fifty years, will have <br />values that are far more extreme than anything <br />that has occurred in the past fifty years, <br />based on the study of the very, very high at- <br />mosphere at the jet stream level. Now you all <br />are familiar, I think, with this jet stream <br />and with some of its variations. <br />