Ancient water wells reveal a prolonged drought in the lower Yellow River area about 2800 years ago

Affiliations

• ¹ School of Geography, Geomatics, and Planning, Jiangsu Normal University, Xuzhou 221116, China; Joint International Research Laboratory for Environmental and Social Archaeology, Shandong University, Jinan 250100, China. Electronic address: syu@sdu.edu.cn.
• ² Joint International Research Laboratory for Environmental and Social Archaeology, Shandong University, Jinan 250100, China.
• ³ Jinan Municipal Institute of Archaeology, Jinan 250062, China.
• ⁴ Joint International Research Laboratory for Environmental and Social Archaeology, Shandong University, Jinan 250100, China. Electronic address: fangh@sdu.edu.cn.
• ⁵ Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, China. Electronic address: fhchen@itpcas.ac.cn.