and/or go to: http://www.likroper.com/page15.html
Thursday, November 10, 2011
CAUSE AND EFFECT?
CAUSE? -- January - May 1967 | Two North Vietnamese divisions, operating out of the DMZ that separates North and South Vietnam, launch heavy bombardments of American bases south of the DMZ. These bases include Khe Sanh, the Rockpile, Cam Lo, Dong Ha, Con Thien and Gio Linh + January 8, 1967 -- America forces begin Operation Cedar Falls, which is intended to drive Vietcong forces from the Iron Triangle, a 60 square mile area lying between the Saigon River and Route 13. Nearly 16,000 American troops and 14,000 soldiers of the South Vietnamese Army move into the Iron Triangle, but they encounter no major resistance. Huge quantities of enemy supplies are captured. Over 19 days, 72 Americans are killed, victims mostly of snipers emerging from concealed tunnels and booby traps. Seven hundred and twenty Vietcong are killed > go to: http://www.pbs.org/battlefield
EFFECT? -- The Chicago Blizzard of 1967 struck northeast Illinois and northwest Indiana on January 26, 1967 with a record-setting 23 inches (58 cm) of snow falling on Chicago and its suburbs before the storm abated the next morning. To this day, it is the worst blizzard in Chicago history > CHICAGO BLIZZARD OF 1967
http://en.wikipedia.org/wiki/C
MEAN CIRCULATION -- The trend toward a high index circulation which began in December continued through most of January. The monthly mean 700-mb. zonal wind speed, averaged between 35" N. and 55" N. in the western half of the Northern Hemisphere, rose from a below normal value of 9.6 meters per second in December to 11.4 m.p.s. in January, or 1.1 m.p.s. above normal. During the second half of the month this index averaged 12.6 m.p.s. Fast westerlies developed in mid-latitudes during the first two-thirds of the month and reached the highest values observed at 700 mb. since records began in 1942. After rising steadily from a daily speed of 9.7 m.p.s. on January 14, the zonal index reached an all-time record for a 5-day period of 16.7 m.p.s. in the period January 17-21, 1967. The previous record of 16.1 m.p.s. occurred in the period December 13-17, 1956. The daily index of 18.2 m.13.s. on January 20, 1967 I\-as also a record, followed by lS.0 m.p.s. on January 19. In agreement with the increased speed of the westerlies, 700-mb. heights in January rose in subtropical and temperate latitudes and fell sharply in high latitudes around the entire hemisphere, relative to their December 1-values (fig. 1). In the January mean circulation most troughs and ridges were in their normal locations, but abnormally strong (figs. 2, 3). Heights were 250 f t . above normal in the expanded western Pacific subtropical ridge, and 510 ft. below normal in the polar vortex in hhe Soviet Arctic -- The exception to this general pattern was the blocking in the North Atlantic, where heights in the ridge were nearly 460 ft. above normal over Greenland and Iceland; this blocking pattern resulted in the deeper than normal eastern European trough downstream. Also, heights associated with the normal north-central Asian rid, we mere 180 ft. above normal in January, and the West African coastal trough was displaced some 15" of longitude westward (figs. 2, 3) -- Record high daily and monthly temperatures occurred during the last ten days of January in the eastern half of the Nation, another example of the "January thaw" quasi-singularity [2]. During this warm spell new record maximum temperatures for January occurred at Wichita, Kans. on the 22d (75" F,), Lansing, Mich. on the 24th (66" E".), and Baltimore, Md. on the 25th (75" F.) ; Syracuse, N.Y. equaled a previous January maximum on the 25th (70" F.). In the Far West, Reno, Nev. had a record high for January on the 15th (70" F.). Only in parts of the South and Southeast were temperatures below normal this month, and only slightly so > go to: http://docs.lib.noaa.gov/rescu
Subscribe to:
Posts (Atom)