Reconstructing glacial outburst floods (jökulhlaups) from geomorphology: Challenges, solutions, and an enhanced interpretive framework ...

• Main Authors: Wells, Greta H, Dugmore, Andrew J, Beach, Timothy, Baynes, Edwin RC, Sæmundsson, Þorsteinn, Luzzadder-Beach, Sheryl
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: SAGE Journals 2022
• Subjects: Geography; 120599 Urban and Regional Planning not elsewhere classified; FOS: Social and economic geography; Arctic
• Online Access: https://dx.doi.org/10.25384/sage.c.5848302.v1; https://sage.figshare.com/collections/Reconstructing_glacial_outburst_floods_j_kulhlaups_from_geomorphology_Challenges_solutions_and_an_enhanced_interpretive_framework/5848302/1

Glacial outburst floods (jökulhlaups) have occurred across Earth throughout the Quaternary—and during earlier glaciations—and are a significant contemporary hazard in Arctic and alpine regions worldwide (Baker, 2013; Carrivick and Tweed, 2013, 2016; Ghienne et al., 2010; Harrison et al., 2018). These sudden meltwater drainage events are triggered by subglacial volcanic eruptions or dam failure or overtopping at ice-contact lakes (Björnsson, 2002; Evans and Clague, 1994; Tweed and Russell, 1999). Jökulhlaups can modify landscapes far beyond the proglacial source region and leave a legacy that can persist for millennia, eroding bedrock, redistributing sediment, and—in the case of the largest events—influencing ocean circulation and global climate (Baynes et al., 2015b; Carling, 2013; Clarke et al., 2004; Cook et al., 2018; Russell et al., 2005). Since floodwaters recede relatively quickly and are difficult to measure in real-time, geomorphologic and sedimentologic impacts are often the only lines of evidence ...