SPATIO-TEMPORAL PATTERN OF GLOBAL CLIMATE EVENT OF THE YOUNGER DRYAS AND HISTORIC WARMING

After the Younger Dryas cooling event taken place between about 10 000 and 11 000 BP (radiocarbon years) (~11 500-13 000 calendar years ago), global climate have happened a seris of events: Preboreal warm-dry during 10800-9160 (14C Age), Boreal warm-dry during 9160-7900 (14C Age), Atlantic cool-wet during 7900-5970 (14C Age), Subboreal warm-dry Hypsithermal during 5970-3660 (14C Age), SubAtlantic cool-wet during 3660-1680 (14C Age), Medieval Warm Period ca. 1000 - 1300 A.D, Little Ice Age in the last 500 years (ca. 1500-1900 A.D.), and Historic Warming. However, it is proved that the events are not synchronous and not isometric from records of various parts of the world. (1) Younger Dryas Stadial The European event is documented throughout the region from Scandinavia to the Mediterranean while the North American oscillation is most evident in the maritime Canadian provinces and southern New England. (2) Historic Warming 1935-2002 Temperature Time Series, Temperature Change in Latitude Range as follow : Latitude Range 75 to 90, Temperature decrease in 0.46033°ãC per ten year Latitude Range 60 to 75, Temperature increase in 0.10941°ãC per ten year Latitude Range 45 to 60, Temperature increase in 0.12920°ãC per ten year Latitude Range 30 to 45, Temperature increase in 0.09487°ãC per ten year Latitude Range 15 to 30, Temperature increase in 0.04896°ãC per ten year Latitude Range 0 to 15, Temperature increase in 0.07355°ãC per ten year Latitude Range -15 to 0, Temperature increase in 0.05010°ãC per ten year Latitude Range -30 to -15, Temperature increase in 0.12159 °ãC per ten year Latitude Range -45 to -30, Temperature increase in 0.09697 °ãC per ten year Latitude Range -60 to -45, Temperature increase in 0.06770 °ãC per ten year Latitude Range -75 to -60, Temperature increase in 0.42502 °ãC per ten year Latitude Range -90 to -75, Temperature decrease in 0.19848 °ãC per ten year It is interesting that Arctic and Anarctic is cooling, other ranges is warming. The most warming area is in Latitude Range -75 to -60, The most cooling area is in Arctic. And they are almost same rate numerically. This research was supported by funding from the National Natural Science Foundation of China (49971078).