Distribution of Jet Streams at 200 mb. in the Middle East

• Published in: Journal of Navigation
• Main Authors: Crossley, A. F., Parkinson, I. N.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Cambridge University Press (CUP) 1967
• Subjects: Ocean Engineering; Oceanography; North Atlantic
• Online Access: http://dx.doi.org/10.1017/s0373463300030745; https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0373463300030745

1. INTRODUCTION. The distribution of jet streams over the North Atlantic, Europe and the Mediterranean for the two years 1957–8 was described in an earlier paper (Crossley, 1961); the present paper extends the study to the area which is here referred to somewhat loosely as the Middle East —it extends between latitudes 40° N. and 10;° N., and from longitude 30° E. to 90° E. in the north but to only 65° E. in the south (Fig. 1). The aircraft trunk routes intersecting this area include those from the Eastern Mediterranean across Arabia and the Persian Gulf to West Pakistan and north-west India. The jet streams which affect the Atlantic-European area in the upper troposphere are mostly of the ‘polar’ type with a core in the neighbourhood of 300 mb. so that they can be conveniently located as a rule on the contour charts for 300 mb.; in the Mediterranean region and in the corresponding latitudes of the North Atlantic the westerly subtropical jet stream is also concerned and charts for both 300 and 200 mb.