Vegetation changes and plant wax biomarkers from an ombrotrophic bog define hydroclimate trends and human-environment interactions during the Holocene in northern Norway ...

• Main Authors: Balascio, Nicholas L., R. Scott Anderson, D’Andrea, William J., Wickler, Stephen, D’Andrea, Robert M., Bakke, Jostein
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: SAGE Journals 2020
• Subjects: Geography; History; Norway; Tromsø; North Atlantic; Northern Norway
• Online Access: https://dx.doi.org/10.25384/sage.c.5096132.v1; https://sage.figshare.com/collections/Vegetation_changes_and_plant_wax_biomarkers_from_an_ombrotrophic_bog_define_hydroclimate_trends_and_human-environment_interactions_during_the_Holocene_in_northern_Norway/5096132/1

Holocene climate records from northern Europe improve our understanding of important North Atlantic ocean and atmospheric circulation systems to long-term insolation-driven changes, as well as more rapid forcing and feedback mechanisms. Here we assess Holocene climate and environmental changes in northern Norway based on the analysis of pollen, non-pollen palynomorphs, plant macrofossils, and plant wax biomarkers from a high latitude ombrotrophic bog. We define the extent and thickness of Hollabåttjønnen Bog (0.16 km 2 ), which is located 10 km north of Tromsø. Several cores were analyzed, including a 5.16-m core that spans the last 9.5 cal ka BP. Vegetation changes from several sites were reconstructed and the distribution and hydrogen isotopic composition (δD) of n -alkanes (C 21 –C 33 ) were analyzed. Our data show several distinct climate intervals that primarily indicate changes in bog surface moisture. In the early Holocene (c. 9.5–7.7 cal ka BP), wetter conditions are defined by the presence of ...