Abstract
Paleo sea-level science is advancing through Earth- and ice-process insights, but key questions linger
Highlights
Unconventional and historic, the first-ever virtual PALeo constraints on SEA level rise (PALSEA; pastglobalchanges.org/palsea) Express workshop was held in September, fostering valuable scientific exchanges among new and established community members
Coupled sea-level ice-sheet models demonstrated the considerable influence that Northern Hemisphere (NH) ice-mass changes can have on Antarctic Ice Sheet (AIS) variability (Gomez et al accepted for publication in Nature)
Dramatic melting of NH ice sheets during the most recent deglaciation (~14,000–10,000 years ago) led to geographically variable sea-level rise around Antarctica, driving increased AIS mass losses, and may have affected AIS stability during the Holocene and Last Interglacial (LIG)
Summary
Unconventional and historic, the first-ever virtual PALeo constraints on SEA level rise (PALSEA; pastglobalchanges.org/palsea) Express workshop (pastglobalchanges.org/ calendar/2020/127-pages/2043) was held in September, fostering valuable scientific exchanges among new and established community members. A new compilation of Northern Hemisphere (NH) ice-sheet extent through the Quaternary (Batchelor et al 2019) showed key spatial differences in ice-sheet configurations between glacial cycles, emphasizing the ongoing need to gather new field evidence and constrain past ice-sheet extents for modeling study support. For example, illustrated the importance of sea-level databases for assessing coastal environment vulnerability (Horton et al 2019).
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