QUANTITATIVE RECONSTRUCTION OF PALAEOCLIMATE SINCE 200 kaBP IN TANGSHAN AREA,HEBEI PROVINCE

Annual mean temperature and precipitation in Tangshan area since 200 kaBP are reconstructed quantitatively in this paper by means of the transfer function of pollen-climatic factors proposed by Song Changqing, based on the pollen data of the Hole TZC6-7 at the former site of the 10^th Middle School,Tangshan city.The results show a clear periodical and cyclic variation pattern in annual mean temperature and precipitation, which can be well correlated with the climatic changes in Huabei area since the late Quaternary, although there may be some deviation between the data we obtained and the absolute values of the palaeoclimatic parameters.11 climatic stages were recognized in Tangshan area since 200 kaBP. There are two warm periods in 120~90 kaBP(50.5~43.5 m) and 40~30 kaBP(22.4~18.8 m) and three cold periods in 70~40ka BP(29.5~22.4 m),30~20 kaBP(18.8~14.2 m) and 20~11 kaBP(14.2~4.4 m)respectively.A cooling event is discovered at about 80ka BP.