Determination of pollen accumulation rates in frozen sediments

• Published in: Permafrost and Periglacial Processes
• Main Authors: Wang, Xia‐Cheng, Geurts, Marie‐Anne
• Format: Article in Journal/Newspaper
• Language: English
• Published: Wiley 1993
• Subjects: Ice; permafrost; Permafrost and Periglacial Processes
• Online Access: http://dx.doi.org/10.1002/ppp.3430040108; https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fppp.3430040108; https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.3430040108

Abstract Pollen accumulation rates (PAR) of 48 samples from a permafrost core were calibrated to assess the influence of ice lensing on the calculations. Results show that permafrost formation can radically change PAR values. Accumulation of segregated ice is a major source of error, while the 9% volumetric expansion of pore water upon freezing must also be considered. The basic result of these influences is the exaggeration of sedimentation rates and sample volumes.