Radiocarbon ages and major n-alkane homologues of peat cores LVPS4 and LVPS5B, Russian Arctic
Fuente:
PANGAEA
Guardado en:
| Autores principales: | , , , , , |
|---|---|
| Formato: | Dataset Open Access |
| Lenguaje: | en |
| Publicado: |
PANGAEA
2011
|
| Materias: | |
| Acceso en línea: | |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| _version_ | 1867172222869700608 |
|---|---|
| author | Andersson, Rina A Kuhry, Peter Meyers, Philip Zebühr, Yngve Crill, Patrick Mörth, Magnus |
| author_facet | Andersson, Rina A Kuhry, Peter Meyers, Philip Zebühr, Yngve Crill, Patrick Mörth, Magnus |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Coupled analyses of n-alkane biomarkers and plant macrofossils from a peat plateau deposit in the northeast European Russian Arctic were carried out to assess the effects of past hydrology on the molecular contributions of plants to the peat. The n-alkane biomarkers accumulated over 9.6 kyr of local paleohydrological changes in this complex peat profile in which a succession of vegetation changes occurred during a transition from a wet fen to a relatively dry peat plateau bog. This study shows that the contribution of the n-C31 alkane from rootlets to peat layers rich in fine and dark roots is important. The results further indicate that the n-alkane Paq and n-C23/n-C29 biomarker proxies that have been useful to reconstruct past water table levels in many peat deposits can be misleading when the contributions of Betula and Sphagnum fuscum to the peat are large. Under these conditions, the C23/(C27 + C31) n-alkane ratio seems to correct for the presence of Betula and S. fuscum and provides a better description for the relative amounts of moisture. The average chain length (ACL) n-alkane proxy also appears to be a good paleohydrology proxy in having larger values during dry and cold conditions in this Arctic bog setting. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_806807 |
| institution | PANGAEA |
| language | en |
| publishDate | 2011 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Radiocarbon ages and major n-alkane homologues of peat cores LVPS4 and LVPS5B, Russian Arctic Andersson, Rina A Kuhry, Peter Meyers, Philip Zebühr, Yngve Crill, Patrick Mörth, Magnus International Polar Year (2007-2008); IPY; Lek-Vorkuta; Northeast Russia; PEATC; Peat corer Coupled analyses of n-alkane biomarkers and plant macrofossils from a peat plateau deposit in the northeast European Russian Arctic were carried out to assess the effects of past hydrology on the molecular contributions of plants to the peat. The n-alkane biomarkers accumulated over 9.6 kyr of local paleohydrological changes in this complex peat profile in which a succession of vegetation changes occurred during a transition from a wet fen to a relatively dry peat plateau bog. This study shows that the contribution of the n-C31 alkane from rootlets to peat layers rich in fine and dark roots is important. The results further indicate that the n-alkane Paq and n-C23/n-C29 biomarker proxies that have been useful to reconstruct past water table levels in many peat deposits can be misleading when the contributions of Betula and Sphagnum fuscum to the peat are large. Under these conditions, the C23/(C27 + C31) n-alkane ratio seems to correct for the presence of Betula and S. fuscum and provides a better description for the relative amounts of moisture. The average chain length (ACL) n-alkane proxy also appears to be a good paleohydrology proxy in having larger values during dry and cold conditions in this Arctic bog setting. |
| title | Radiocarbon ages and major n-alkane homologues of peat cores LVPS4 and LVPS5B, Russian Arctic |
| topic | International Polar Year (2007-2008); IPY; Lek-Vorkuta; Northeast Russia; PEATC; Peat corer |
| url | https://doi.org/10.1594/PANGAEA.806807 |