| Titre | Long-term carbon sequestration in North American peatlands |
| Auteur | Gorham, E; Lehman, C; Dyke, A; Clymo, R; Janssens, J |
| Source | Quaternary Science Reviews vol. 58, 2012 p. 77-82, https://doi.org/10.1016/j.quascirev.2012.09.018 |
| Année | 2012 |
| Séries alt. | Secteur des sciences de la Terre, Contribution externe 20100261 |
| Éditeur | Elsevier |
| Document | publication en série |
| Lang. | anglais |
| DOI | https://doi.org/10.1016/j.quascirev.2012.09.018 |
| Media | papier; en ligne; numérique |
| Formats | pdf |
| Province | Colombie-Britannique; Alberta; Saskatchewan; Manitoba; Ontario; Québec; Nouveau-Brunswick; Nouvelle-Écosse; Île-du-Prince-Édouard; Terre-Neuve-et-Labrador; Territoires du Nord-Ouest; Yukon;
Nunavut |
| SNRC | 1; 2; 3; 10; 11; 12; 13; 14; 15; 16; 20; 21; 22; 23; 24; 25; 26; 27; 28; 29; 30; 31; 32; 33; 34; 35; 36; 37; 38; 39; 40; 41; 42; 43; 44; 45; 46; 47; 48; 49; 52; 53; 54; 55; 56; 57; 58; 59; 62; 63; 64; 65;
66; 67; 68; 69; 72; 73; 74; 75; 76; 77; 78; 79; 82; 83; 84; 85; 86; 87; 88; 89; 92; 93; 94; 95; 96; 97; 98; 99; 102; 103; 104; 105; 106; 107; 114O; 114P; 115; 116; 117; 120; 340; 560 |
| Lat/Long OENS | -141.0000 -50.0000 90.0000 38.0000 |
| Sujets | tourbe; analyses de la tourbe; tourbières; Holocène; carbone organique; écosystèmes; géologie des dépôts meubles/géomorphologie; Nature et environnement; Cénozoïque; Quaternaire |
| Illustrations | location maps; tables; plots; spetra |
| |
| Programme | Études paléo-environnementales sur les changements climatiques, Géosciences de changements climatiques |
| Résumé | (disponible en anglais seulement)
Peatland ecosystems store about 500e600 Pg of organic carbon, largely accumulated since the last glaciation. Whether they continue to sequester carbon or
release it as greenhouse gases, perhaps in large amounts, is important in Earth's temperature dynamics. Given both ages and depths of numerous dated sample peatlands, their rate of carbon sequestration can be estimated throughout the Holocene. Here
we use average values for carbon content per unit volume, the geographical extent of peatlands, and ecological models of peatland establishment and growth, to reconstruct the time-trajectory of peatland carbon sequestration in North America and
project it into the future. Peatlands there contain w163 Pg of carbon. Ignoring effects of climate change and other major anthropogenic disturbances, the rate of carbon accumulation is projected to decline slowly over millennia as reduced net carbon
accumulation in existing peatlands is largely balanced by new peatland establishment. Peatlands are one of few longterm terrestrial carbon sinks, probably important for global carbon regulation in future generations. This study contributes to a
better understanding of these ecosystems that will assist their inclusion in earth-system models, and therefore their management to maintain carbon storage during climate change. |
| GEOSCAN ID | 287137 |
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