【摘要】 地下水是古气候信息的载体，它的化学成分和同位素组成可以反映古气候的演变。应用３Ｈ、１４Ｃ和３６Ｃｌ资料计算的河北平原地下水的年龄如下：第１含水组（Ｑ４）０～３ｋａ，第２含水组（Ｑ３）３～１００ｋａ，第３含水组（Ｑ２）１００～３００ｋａ，第４含水组（Ｑ１）３００～７００ｋａ。根据δ１８Ｏ和δＤ计算的地下水补给期的地面平均气温表明，第四纪以来河北平原气候环境是逐渐变暖的。根据第４至第１含水组（Ｑ１～Ｑ４）地下水δＤ＝－７０‰的等值线变化，认为第四纪以来，渤海海岸线逐渐由东向西移动。更多还原

【Abstract】 Groundwater is the carrier of paleoclimatical information. The chemical and isotopic composition of groundwater can reflect on paleoclimatical evolution. The groundwater ages of Hebei plain calculated by\ 3H, 14 C and\ 36 Cl data are shown as follows: the 1st aquifer group (Q 4) is 0￣3ka, the 2nd aquifer group (Q 3) 3￣100ka, the 3rd aquifer group (Q 2) 100￣300ka and the 4th aquifer group (Q 1) 300￣700ka. During the penetrating period of groundwater, the surface mean temperature calculated from δ 18 O and δD shows that the paleoclimatical environment of Hebei plain in Quaternary Period became warmer gradually. The change of δD value contour of groundwater within the 4th￣1st aquifer group (Q 1￣Q 4) manifests that the shore line of Bohai moved from east to west gradually in Quaternary Period.更多还原