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通过对塔里木河流域 1 2kaBP以来地层沉积相特征研究和气候环境代用指标的测试分析 ,从时空的角度讨论了该流域沙漠演化过程、发育模式与气候变迁的关系 .认为从 1 2kaBP以来随着全球气温的回升 ,在 1 2～ 1 0kaBP期间 ,气候温凉偏干旱、泛洪堆积明显、风沙活动弱 ;1 0～ 8kaBP期间 ,气候干冷、风沙活动强烈 ,是沙漠大规模扩展时期 ;8～ 3kaBP期间的全新世高温期 ,气候干燥炎热 ,塔里木河流域周围和山区冰雪融水增多 ,河流水量增加 ,河流泛洪沉积十分活跃 ,但流沙规模的缩小、沙丘固定仅限制在河湖沿岸和沙丘低洼地区 ;从 3kaBP至今 ,在新冰期作用下 ,加上人类不合理的经济活动导致流域环境恶化、风沙活动盛行、沙尘暴频繁 .地层沉积相的古气候证据提示 :1 2kaBP以来该流域在全球气候波动的影响下叠加了内陆干旱盆地的环境效应 ,是总体干燥气候条件下 ,具有暖干与冷干交替变化规律 .
Based on the study of stratigraphic sedimentary facies characteristics and climatic and environmental proxies in the Tarim River Basin since 12 kaBP, the relationship between the desert evolution process and developmental patterns and climate change is discussed from the perspective of space and time. During the period of 1 2 ~ 1 0kaBP, the climate has cool and partial drought, obvious flooding accumulation and weak sand-blown sand activity. During the period of 10 ~ 8kaBP, the climate is dry and cold-sand with strong aeolian activity, which is a period of large-scale desertification; During the Holocene high temperature period, the climate is hot and dry, the melting of ice and snow around the Tarim River Basin and mountainous areas increases, the river water volume increases and the floodflood sedimentation is very active. However, the size of the quicksand is reduced and the dune fixation is limited to the rivers and lakeshore and dune low Region. From 3kaBP to the present, under the function of the new glacial period, combined with unreasonable human activities led to the deterioration of basin environment, prevalence of sandstorms and frequent sandstorms. Evidence from the paleoclimate of sedimentary facies suggests that the basin has fluctuated globally since 12kaBP Under the influence of superimposed on the environmental effects of inland arid basins, is the overall dry climate, with There is alternating law of dry and cold dry.