通过对进行了等时处理的甜水海钻孔有机碳含量所做的R／S分析，发现其存在明显的Hurst现象，Hurst指数H为0．74，分数维D＝2－H＝1．26，这与太平洋深海岩芯的氧同位素分析结果非常接近。Hurst指数H＝0．74＞0.5，表明甜水海地区气候环境演化存在持续性（Persistence）。甜水海地区地处青藏高原腹地，这种气候环境演化的持续特征可能是晚新生代以来青藏高原持续构造抬升活动影响的结果。 Through the R / S analysis of the organic carbon content of isobaric seawater processed by isochronous treatment, it was found that there was a significant Hurst phenomenon with Hurst index H of 0.74 and fractal dimension D = 2-H = 1.26 , Which is very close to the results of oxygen isotope analysis of the core of the Pacific deep sea. Hurst index H = 0.74> 0.5, indicating that there is persistence in the climate and environment evolution in the area of ​​Tianshuihai. The Tianshuihai area is located in the hinterland of the Qinghai-Tibet Plateau. The continuous characteristics of this climate and environmental evolution may be the result of the continuous tectonic uplifting activities in the Qinghai-Tibet Plateau since the Late Cenozoic.