feet, are east to northeast, flowing down from the ice cap. Be- 

 tween 6,000 and 13,000 feet there is a shift to south and southeast, 

 with the circulation in relation to the island resembling that found 

 around an anticyclone. This same circulation scheme of winds 

 off the ice cap at low levels, with south to southeast winds above 

 6,000 feet, holds true for spring and summer. In autumn the 

 prevalence of air flow from the northeast continues up to 10,000 

 feet, and at 13,000 feet becomes northwest to north. 



The wind scheme at Mount Evans is similar to that at Etah as 

 both are on the western side of Greenland. The lowest level of air 

 at Mount Evans has an easterly component coming from the ice 

 cap. Above 3,000 feet the wind assumes a southerly component 

 at all seasons. A short summer record of winds-aloft data was 

 obtained at a station on the ice cap in central Greenland. At this 

 season the regionof highest pressure in the Arctic is located off the 

 northwest coast of Greenland, and the region of lowest pressure is 

 to the east, at Baffin Island. On the surface of the ice cap as a 

 consequence, 70 percent of the wind is from the east-northeast to 

 liouth-southeast. This prevalence of easterly wind continues above 

 the ice cap to a depth of at least 17,000 feet. Too much reliability 

 cannot be placed on the record because of its shortness. At East 

 Station, on the east coast of Greenland, there is a high percentage 

 of calm at the surface, a maximum in the summer of 88 percent 

 and a minimum in the autumn of 26 percent. Light easterly winds 

 persist for the remaining time. Immediately above the surface 

 layer a northwesterly wind prevails, and the analogy of Green- 

 land's wind system to that of an anticyclone is again demonstrated. 



Reykjavik, off the southeast coast of Greenland, is in a region of 

 cyclogenesis and the wind regime should be a variable one. Dur- 

 ing the winter, Reykjavik is in the central portion of the statistical 

 low pressure system. Southeasterly winds prevail in the first 

 3,000 feet of atmosphere. At 6,000 feet there is no prevailing 

 wind, and at 10,000 feet and 13,000 feet westerly winds prevail. 

 In the spring this statistical low has moved eastward and decreased 

 in intensity, and the prevailing wind at Reykjavik is northwest- 

 erly. Above the surface easterly winds prevail up to 10,000 feet 

 and at 13,000 feet northerly winds prevail. In the summer the 

 pressure in the Polar Anticyclone is highest to the northeast of 

 Greenland and the prevalence of the deep current of northerly wind 

 in evidence at East Station in Greenland extends eastward as far 

 as Reykjavik. This current of north wind exists from the surface 



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