Lichenometry in the Cordillera Blanca, Peru: “Little Ice Age” moraine chronology

详细信息    查看全文

• 作者：Olga Solomina ; Vincent Jomelli ; Georg Kaser ; Alcides Ames ; Bernhard Berger ; Bernard Pouyaud
• 关键词：“ ; Little Ice Age” ; moraines ; Cordillera Blanca ; Lichenometry
• 刊名：Global and Planetary Change
• 出版年：2007
• 出版时间：October 2007
• 年：2007
• 卷：59
• 期：1-4
• 页码：225-235
• 全文大小：476 K

文摘

This paper is a comparison and compilation of lichenometric and geomorphic studies performed by two independent teams in the Cordillera Blanca, Peru, in 1996 and 2002 on 66 “Little Ice Age” moraines of 14 glaciers. Using eleven new control points, we recalibrated the initial rapid growth phase of the previously established Rhizocarpon subgenus Rhizocarpon growth curve. This curve was then used to estimate the age of “Little Ice Age” moraines. The time of deposition of the most prominent and numerous terminal and lateral moraines on the Pacific-facing side of the Cordillera Blanca (between AD 1590 and AD 1720) corresponds to the coldest and wettest phase in the tropical Andes as revealed by ice-core data. Less prominent advances occurred between AD 1780 and 1880.