Three-dimensional reconstruction of carbon accumulation and CH4 emission during nine millennia in a raised mire

Local Spatial Heterogeneity of Holocene Carbon Accumulation throughout the Peat Profile of an Ombrotrophic Northern Minnesota Bog

“…Expanding this region to include the Hudson/James Bay area with an additional 17 sites for which this data is available (van Bellen et al 2011b; Loisel et al 2014) , resulted in increased regional variation in LORCA (range=12–61 g C m –2 yr –1 , mean=25±12 g C m –2 yr –1 , CV=0.5) and in peat carbon stocks (range=45–373 kg C m –2 , mean=171±86 kg C m –2 , CV=0.5). This suggests that while local spatial variation in LORCA is high at S1, consistent with findings from other studies characterizing a single site with multiple cores (Korhola et al 1996; van Bellen et al 2011b), variation within S1 Bog is smaller than that found for LORCA across the region.…”

Carbon and sediment accumulation in the Everglades (USA) during the past 4000 years: Rates, drivers, and sources of error

“…But Clymo's original model and its later derivatives produce a concave curve for the rate of cumulative carbon accumulation indicating that the decay rate declines in time as a function of the organic mass remaining. In contrast, the second‐order polynomial fit for the NESRS profile provides a slightly convex curve similar to the predictions of the Trumbore and Harden [1997] model and profiles reported for certain northern peatlands [e.g., Korhola et al , 1996; Trumbore and Harden , 1997; Yu et al , 2003]. Carbon accumulation models may also overestimate the decay rates for sedimentary profiles with significant sedimentary gaps, which would be expected in subtropical regions with a monsoonal pattern of precipitation interspersed with episodic droughts.…”

Development history and carbon accumulation of a slope bog in oceanic British Columbia, Canada

“…The LORCA (6.3 g m 2 2 yr -1 ) and the average vertical peat growth (0.15 mm yr -1 ) were remarkably low compared to published data from different northern countries (Zoltai, 1991;Gorham, 1991;Botch et al, 1995;Tolonen and Turunen, 1996;Mäkilä, 1997;Vitt et al, 2000;Turunen et al, 2001;2002). The LORCA values of British Columbia were even lower than the estimated average LORCA (11-15 g m 2 2 yr -1 ) for the entire Holocene epoch in northern Yukon, Subarctic Russia and Subarctic and Arctic Canada (Ovenden, 1990;Botch et al, 1995;Vardy et al, 2000).…”