Reconstructed ~13-ka paleoclimate indexes using the Chibuzhang Co sediments on the central Qinghai-Tibet Plateau_CH

We developed two regional paleoclimate indexes for assessing summer monsoon effect in the source region of the Yangtze River (central Qinghai-Tibet Plateau). The Indian Monsoon Index (IMI) was created by averaging TOC and TIC records, while the effective moisture index (EMI) was obtained by averaging mean size grade MG (φ) and TIC after normalizing these three proxies. The sequence is long ~13,000 years.本研究构建了两项区域古气候指标，用于评估青藏高原中部长江源区的夏季风效应。其中，印度季风指数（Indian Monsoon Index, IMI）通过对总有机碳（Total Organic Carbon, TOC）与总无机碳（Total Inorganic Carbon, TIC）的记录取平均得到；有效湿度指数（effective moisture index, EMI）则在对三项代用指标完成标准化处理后，对平均粒度等级MG（φ值）与TIC取平均计算所得。该时间序列时长约13000年。