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Three‐dimensional reconstruction of carbon accumulation and CH 4 emission during nine millennia in a raised mire
Author(s) -
KORHOLA ATTE,
ALM JUKKA,
TOLONEN KIMMO,
TURUNEN JUKKA,
JUNGNER HÖGNE
Publication year - 1996
Publication title -
journal of quaternary science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.142
H-Index - 94
eISSN - 1099-1417
pISSN - 0267-8179
DOI - 10.1002/(sici)1099-1417(199603/04)11:2<161::aid-jqs248>3.0.co;2-j
Subject(s) - mire , peat , bog , carbon sequestration , carbon fibers , geology , physical geography , period (music) , flux (metallurgy) , carbon cycle , environmental science , carbon dioxide , geography , archaeology , ecosystem , ecology , chemistry , materials science , physics , organic chemistry , composite number , acoustics , composite material , biology
A three‐dimensional model, based on numerous vertical and horizontal 14 C 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 4 flux occurred between 4500 and 3000 yr ago, the period of the fastest horizontal growth. In addition to autecological factors, a climatic shift towards cooler and wetter conditions is a plausible mechanism for maintaining accelerated carbon accumulation.