The regions with the most significant temperature trends during the last century

Having analyzed a global grid temperature anomaly data set and some sea lev el pressure data during the last century, we round the following facts. Fir stly, the annual temperature change with a warming trend of about 0.6 degre esC / 100 years in the tropical area over Indian to the western Pacific Oce ans was most closely correlated to the glob:ll mean change. Therefore, the temperature change in this area might serve as an indicator of global mean change at annual and longer time scales. Secondly, a cooling of about -0.3 degreesC / 100 years occurred over the northern Atlantic. Thirdly, a two-wa ve pattern of temperature change, warming over northern Asia and northweste rn America and cooling over the northern Atlantic and the northern Pacific, occurred during the last half century linked to strengthening westerlies o ver the northern Atlantic and the weakening Siberian High. Fourthly. a rema rkable seasonal difference occurred over the Eurasian continent, with cooli ng (warming) in winter (summer) during 1896-1945. and warming (cooling) in winter (summer) during 1946-1995. The corresponding variations of the North Atlantic Oscillation and the Southern Oscillation were also discussed.