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Further Studies of the Movement and Formation of Hurricanes and Their Forecasting

Herbert RiehlThe University of Chicago

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Maj. Newton M. BurgnerUSAF, Headquarters, Air Weather Service

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At first the relation between the motion of tropical storms and the speed of the steering current is investigated quantitatively. This necessitates definition of the steering current along all space axes and time. The result is that the zonal component of motion of storms on the average equals the zonal component of the steering current. There is some scatter about the linear regression line.

The following parts deal with formation of tropical storms. Earlier work on the relation between motion of the long wave train in the westerlies and development of hurricanes is extended and it is shown that progression of the long waves very frequently precedes deepening. A synoptic example shows the three-dimensional structure of the atmosphere and its changes with time.

1 Participated under Research Contracts between the Office of Naval Research and the University of Chicago.

2 Participated while on assignment as a graduate student at the University of Chicago under USAF Institute of Technology sponsorship. His contribution is submitted as the work of an individual and does not necessarily reflect the views of the United States Air Force.

At first the relation between the motion of tropical storms and the speed of the steering current is investigated quantitatively. This necessitates definition of the steering current along all space axes and time. The result is that the zonal component of motion of storms on the average equals the zonal component of the steering current. There is some scatter about the linear regression line.

The following parts deal with formation of tropical storms. Earlier work on the relation between motion of the long wave train in the westerlies and development of hurricanes is extended and it is shown that progression of the long waves very frequently precedes deepening. A synoptic example shows the three-dimensional structure of the atmosphere and its changes with time.

1 Participated under Research Contracts between the Office of Naval Research and the University of Chicago.

2 Participated while on assignment as a graduate student at the University of Chicago under USAF Institute of Technology sponsorship. His contribution is submitted as the work of an individual and does not necessarily reflect the views of the United States Air Force.

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