Peatlands take millennia to reach equilibrium, accumulating peat (and thereforecarbon) slowly over time. Peatland models and peat core samples can be used to estimate therate of peat and carbon accumulation for generalised and specific sites, respectively. Thecomparison between simulated and measured accumulation values can both evaluatesimulations and place the measured peatland in context for empirical studies.Our research aims to: (1) assess the variance between simulated and measured (fromcore samples) peat and carbon accumulation data; and (2) evaluate our peatlandenvironmental systems model for use in studies of extraction.We have measured the density, age (14C), normalised depth and carbon percentage ofpeat samples taken in Eastern Quebec autumn 2022 using a Russian corer. These valuesenabled us to estimate the carbon accumulation rate of our study site over the past 8000years. Our environmental systems model approximates peat accumulation in peat systems andis currently being adjusted to the addition of a hydrological sub-model. Our model allows fora range of carbon percentage and density to be used, in order to infer simulated peatlandcarbon accumulation. We will consequently be able to assess the similarity betweenmeasured carbon accumulation and simulated carbon accumulation rates, which will validateour environmental systems model.Peat and carbon accumulation rates demonstrate a variation over time, with fastestaccumulation occurring in the youngest samples (pre-3000 years old) and sloweraccumulation in the oldest samples (post-6000 years old) for the field measured site. Themean accumulation rate for the measured site is approximately 24 g C m-2 y-1, which issimilar to values reported in the literature. Our environmental systems model demonstrates asimilar trend of age to carbon accumulation, simulating mean carbon accumulation as 23.7 gC m-2 y-1, with sensitivity to input density and carbon percentage.Our results will be used as a building block to infer when net-zero biospheric carbonemissions and carbon neutral conditions can be reached in future research, according topeatland extraction and management.