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通过中国贵州荔波龙泉洞L 1及L 2两根石笋19件ICPM S230T h测年和459件氧稳定同位素分析,L 1时限范围为918-1910aA.D.,L 2为724-1888aA.D.;稳定同位素样品的平均分辨率分别为6.6a和3.6a。两根石笋1δ8O记录取得了平行一致的结果,石笋记录可分为3个气候期,即:中世纪冷期(公元8世纪-995aA.D.),石笋1δ8O总的偏重,变化幅度较小,最轻为-8.84‰,最重为-6.72‰,平均值为-7.76‰;中世纪暖期(995-1340aA.D.),石笋记录为两峰夹一谷,200年级的一个半旋回,δ18O最轻为-9.47‰,最重为-6.58‰,平均值为-7.94‰;小冰期(1340-1880aA.D.),石笋记录为四谷三峰相间交替,即季风表现出由弱到强的200年级3个半旋回,1δ8O最轻为-9.50‰,最重为-6.07‰,平均值与中世纪暖期基本一致,为-7.92‰,但变化幅度要大一些,特别是弱季风期要偏重一些。L 1及L 2两石笋δ18O记录可以很好地和中国中东部物候记录对比。在总体变化格局上也可以和格陵兰冰芯记录进行对比。石笋记录也可以与宇宙核素产率及太阳耀斑记录进行对比,小冰期中石笋δ18O记录的4个低谷期(弱季风期),正好与宇宙核素产率及太阳耀斑曲线的低谷区相对应,并分别可以和太阳黑子1810年达尔顿极小值、1645-1715年蒙德极小值、1420-1530年的斯波瑞尔极小值、1280-1440年的沃尔夫极小值一一对应。太阳黑子的变化,直接改变地球接受太阳辐射能量的变化,说明低纬度地区短尺度季风气候直接响应于太阳辐射能量的变化。
Through the dating of 19 ICPM S230T h and 459 oxygen stable isotope analyzes of two stalagmites L 1 and L 2 in Longquan Cave, Libo, Guizhou, China, the L 1 time-domain ranged from 918 to 1910 aA.D and the L 2 was 724 to 1888 aA.D . The average resolution of stable isotope samples were 6.6a and 3.6a, respectively. The stalagmite records can be divided into three climatic periods, namely: the medieval cold period (8th century -995aA.D.), stalagmite 1δ8O total emphasis, the change range is small, the most The light is -8.84 ‰, the heaviest is -6.72 ‰, the average is -7.76 ‰; in the middle-warm period (995-1340aA.D.), the stalagmite records as a two-pinch-one valley, a half-cycle in the 200th grade, The light is -9.47 ‰, the heaviest is -6.58 ‰, the average is -7.94 ‰. The small ice age (1340-1880aA.D.) 3 semi-cycles, 1δ8O the lightest -9.50 ‰, the heaviest -6.07 ‰, the average and the Medieval warm period is basically the same, -7.92 ‰, but the magnitude of change to be larger, especially in the weak monsoon period to be more emphasis on some. The δ18O records of the two stalagmites L 1 and L 2 can be compared well with the records of the middle and eastern eastern China. In the overall pattern of change can also be compared with the Greenland ice core records. The stalagmite records can also be compared with the nuclear nuclide production rates and solar flare records. The 4 troughs recorded in the stalagmite δ18O during the Little Ice Age (weak monsoon period) coincide with the nuclide yields and the troughs of the solar flare curve , Respectively, and sunspot 1810 Dalton minimum, 1645-1715 Monde minimum, 1420-1530 years of Sporrell minimum, 1280-1440 years, the Wolf minimum correspond. Changes in sunspots directly change the earth’s acceptance of solar radiation energy changes, indicating that the short-range monsoon climate in low latitudes directly respond to solar radiation energy changes.