Sulphate controls on dissolved organic carbon dynamics in blanket peat: Linking field and laboratory evidence
Détails
ID Serval
serval:BIB_E4ED18FFA6D3
Type
Actes de conférence (partie): contribution originale à la littérature scientifique, publiée à l'occasion de conférences scientifiques, dans un ouvrage de compte-rendu (proceedings), ou dans l'édition spéciale d'un journal reconnu (conference proceedings).
Collection
Publications
Institution
Titre
Sulphate controls on dissolved organic carbon dynamics in blanket peat: Linking field and laboratory evidence
Titre de la conférence
Dynamics and Biogeochemistry of River Corridors and Wetlands
ISBN
978-1-901502-03-9
Statut éditorial
Publié
Date de publication
2005
Editeur⸱rice scientifique
Heathwaite L, Webb B, Rosenberry D, Weaver D, Hayash M
Volume
294
Série
IAHS PUBLICATION
Pages
3-9
Notes
International Symposium on Dynamics and Biogeochemistry of River
Corridors and Wetlands held at the 7th Scientific Assembly of the
International-Association-of-Hydrological-Sciences, Foz do Iguaco,
BRAZIL, APR 03-09, 2005
Corridors and Wetlands held at the 7th Scientific Assembly of the
International-Association-of-Hydrological-Sciences, Foz do Iguaco,
BRAZIL, APR 03-09, 2005
Résumé
The dynamics of dissolved organic carbon (DOC) in blanket peat soil
solution has been monitored at an upland catchment in northern Britain
in relation to key environmental controls. Dissolved organic carbon
(DOC) displayed a strong seasonal cycle that showed a clear
relationship with soil temperature. However, in years of significant
water table drawdown (>25 cm), summer DOC concentrations were
substantially lower than in ``normal'' years, suggesting that factors
other than temperature controlled the release of DOC. Major episodic
release of sulphate (SO42-), and an associated decline in pH, was also
observed during drought periods. Controlled laboratory experiments were
conducted over a 22 week period to factor out the relationships between
water table depth, temperature and soil solution chemistry on DOC
dynamics. The results from the laboratory experiments closely followed
the patterns observed in the field data. Results suggest that changes
in soil solution chemistry (especially SO42-), in response to changes
in soil hydrology, exerted a stronger control on DOC dynamics under
drought conditions than variations in temperature alone.
solution has been monitored at an upland catchment in northern Britain
in relation to key environmental controls. Dissolved organic carbon
(DOC) displayed a strong seasonal cycle that showed a clear
relationship with soil temperature. However, in years of significant
water table drawdown (>25 cm), summer DOC concentrations were
substantially lower than in ``normal'' years, suggesting that factors
other than temperature controlled the release of DOC. Major episodic
release of sulphate (SO42-), and an associated decline in pH, was also
observed during drought periods. Controlled laboratory experiments were
conducted over a 22 week period to factor out the relationships between
water table depth, temperature and soil solution chemistry on DOC
dynamics. The results from the laboratory experiments closely followed
the patterns observed in the field data. Results suggest that changes
in soil solution chemistry (especially SO42-), in response to changes
in soil hydrology, exerted a stronger control on DOC dynamics under
drought conditions than variations in temperature alone.
Web of science
Création de la notice
03/02/2011 15:41
Dernière modification de la notice
20/08/2019 17:08
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