Three-dimensional reconstruction of carbon accumulation and CH4 emission during nine millennia in a raised mire
✍ Scribed by ATTE KORHOLA; JUKKA ALM; KIMMO TOLONEN; JUKKA TURUNEN; HÖGNE JUNGNER
- Publisher
- John Wiley and Sons
- Year
- 1996
- Tongue
- English
- Weight
- 559 KB
- Volume
- 11
- Category
- Article
- ISSN
- 0267-8179
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✦ Synopsis
A three-dimensional model, based on numerous vertical and horizontal I4C datings and GIS simulation from a concentrically domed mire in southern Finland, demonstrates considerable variation in actual (net) rate of carbon accumulation (ARCA) through time. Lateral growth between 9000 and 3000 yr ago accounts for only 25% of the total carbon sequestration, whereas bog formation after ombrotrophication is responsible for the remaining 75%. On the other hand, the most rapid increase in landscape CH, flux occurred between 4500 and 3000 yr ago, the period of the fastest horizontal growth. In addition to autecological factors, a climatic brdof~aternary kience shift towards cooler and wetter conditions is a plausible mechanism for maintaining accelerated carbon accumulation.