PART IV — DYNAMICS OF THE ATMOSPHERE-OCEAN SYSTEM 



FIGURE IV-7 — AVAILABILITY OF UPPER AIR DATA 



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The map shows the current and planned global radiosonde network. The current 

 network is adequate only over Europe, central Asia, and the United States. The 

 planned additions will add greatly to our knowledge of the southern hemisphere; they 

 are part of the first phase of the World Weather Watch. 



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