An 8000-year multi-proxy peat-based palaeoclimate record from Newfoundland: Evidence of coherent changes in bog surface wetness and ocean circulation

Abstract

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Effects of the peat acid digestion protocol on geochemically and morphologically diverse tephra deposits

“…Three Holocene tephra deposits with differing predicted chemical durability (Fig. ) and shard morphologies (Table ) were selected as case studies to test the effects of acid digestion on volcanic glass geochemistry: the Changbaishan ‘Millennium’ tephra (B‐Tm), from Utasi Bog, Japan (42°38′00.32″N, 140°18′26.79″E; Hughes et al ., ), the Saksunarvatn ash from Havnardalsmyren, Faroe Islands (62°00′57.5″N, 6°51′17.0″W; Wastegård et al ., ), and the White River Ash eastern lobe (WRAe), from Pound Cove Bog (53°35′44″W, 49°9′59″N; Blundell et al ., ) and Baby Pond Bog (47°25′16.1″N, 53°32′47.2″W; this study), Newfoundland. These case studies are representative of the range of tephra deposits commonly used to construct peatland tephrostratigraphies (Lawson et al ., ), and include both visible tephra beds and ultradistal cryptotephra.…”

Mid to late-Holocene sea-surface temperature variability off north-eastern Newfoundland and its linkage to the North Atlantic Oscillation

“…The most pronounced cool episode in Trinity Bay at 5.2–4.1 ka BP has also been identified in a dinocyst reconstruction from Bonavista Bay, as fresh and cold surface water conditions were prevalent during the interval from 5.7 to 4 ka BP (Solignac et al, 2011; Figure 6c). There is also evidence of unusually dry conditions on Newfoundland at 5.2–4 ka BP as reconstructed from peatlands (Amesbury et al, 2013; Blundell et al, 2018). These records support the modern, twentieth century relation between SST and precipitation, as the north coast of Newfoundland has experienced reduced precipitation during periods with colder temperatures, due to drier continental airflows (Banfield and Jacobs, 1998).…”

A regime shift from erosion to carbon accumulation in a temperate northern peatland

“…Palaeoecological studies from peatlands are common but these typically focus on long‐term changes in the peatland or on using the peat as an archive of regional climate change (e.g. Blundell, Hughes, & Chambers, 2018; Milner et al., 2016). Instead, we use a fine‐scale palaeoecological approach that allows us to understand recent peatland behaviour and regime shifts.…”