The major change in the circulation during the course of the winter 1976-77 was the development of an immense blocking high over the polar region during early January, accompanied by expansion of the deep Aleutian low to fill the entire north Pacific and a southward displacement of the zonal westerlies over much of the Hemisphere. The spring circulation anomalies were nearly out of phase with those that had prevailed during the preceding winter over much of the Northern Hemisphere. The spring pattern became established early in March and persisted with nearly as much regularity as the winter pattern had. During summer, above normal mid-tropospheric heights again prevailed over high latitudes. Below normal heights over much of Canada led to a cool summer there and along the northern United States border east of the Rockies. Hot, dry weather continued over much of the Western United States and above normal heights over the Southeast. During the Fall of 1977, except for a small area of weak blocking on the Asian side the North Pole heights were generally below normal at high latitudes and fast zonal westerlies prevailed around the hemisphere at middle latitudes throughout most of the season.

  • Corporate Authors:

    Heldref Publications

    1319 18th Street, NW
    Washington, DC  United States  20036-1802
  • Authors:
    • Wagner, A J
  • Publication Date: 1978-2

Media Info

  • Features: Figures;
  • Pagination: p. 25
  • Serial:
    • Weatherwise
    • Volume: 31
    • Issue Number: 1
    • Publisher: Heldref Publications

Subject/Index Terms

Filing Info

  • Accession Number: 00173819
  • Record Type: Publication
  • Source Agency: Weatherwise
  • Files: TRIS
  • Created Date: Jul 29 1978 12:00AM