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根据昆仑山北坡克里雅河上游海拔2750m的一处台地的风尘沉积剖面KMA,利用沉积物粒度、总有机质含量(TOM)、碳酸盐含量和部分孢粉记录重建了当地近5000年的环境变化历史。研究认为,研究剖面所在地区在4300cal·aB·P.前和3000～2600cal·aB·P.之间相对湿润,其余时段均表现为干旱状态;塔克拉玛干沙漠南缘风沙活动在3400cal·aB·P.,3000～2600cal·aB·P.,1800cal·aB·P.,1200cal·aB·P.,900～650cal·aB·P.表现活跃,沙漠向南扩张,表明在KMA剖面古环境记录中塔里木盆地南部沙漠边缘和山地的降水存在着显著分异。红色噪声谱分析还显示,KMA剖面的环境记录存在多种与太阳辐射或者太阳活动相关的显著周期,可能表明研究区环境变化的主要驱动因素与太阳辐射强迫有关。
According to the dust depositional profile KMA of a platform located at an altitude of 2750m above the upper reaches of the Keriya River on the northern slope of the Kunlun Mountains, sediment grain size, total organic matter (TOM), carbonate content and partial sporopollen records were used to reconstruct the nearly 5000-year Environmental change history. The study shows that the area of the study section is relatively humid between 4300cal · aB · P · and 3000 ~ 2600cal · aB · P · s, while the remaining periods show arid status. The activity of the sand around the southern Taklimakan Desert is 3400cal · aB · P. , 3000 ~ 2600cal · aB · P ·, 1800cal · aB · P ·, 1200cal · aB · P ·, 900 ~ 650cal · aB · P. Actively, the desert expanded southward, indicating that in the KMA profile paleoenvironmental record, the Tarim Basin There is a significant difference in precipitation between the southern desert edge and mountainous areas. The red noise spectrum analysis also shows that there are a number of significant cycles associated with solar radiation or solar activity in the environmental records of the KMA profile, which may indicate that the main drivers of environmental changes in the study area are related to solar radiation forcing.