达尔宗湖沉积物近千年来黑碳浓度变化以及夏河地区统治政权变化 (IMAGE) Science China Press Caption ROC是中华民国的缩写,PRC是中华人民共和国的缩写。阴影表示黑碳浓度显著增大阶段,灰色线条为50年平滑结果,水平虚线为研究时段黑碳浓度的平均值(2 mg/g) Credit ©《中国科学》杂志社 Usage Restrictions Use with credit. License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.