Different sources and degradation state of dissolved, particulate, and sedimentary organic matter along the Eurasian Arctic coastal margin
作者: Emma KarlssonJohan GeltingTommaso TesiBart DongenAugust AnderssonIgor SemiletovAlexander CharkinOleg DudarevÖrjan Gustafsson
刊名: Global Biogeochemical Cycles, 2016, Vol.30 (6), pp.898-919
来源数据库: ProQuest Journal
原始语种摘要: Thawing Arctic permafrost causes massive fluvial and erosional releases of dissolved and particulate organic carbon (DOC and POC) to coastal waters. Here we investigate how different sources and degradation of remobilized terrestrial carbon may affect large-scale carbon cycling, by comparing molecular and dual-isotope composition of waterborne high molecular weight DOC (>1kD, aka colloidal OC), POC, and sedimentary OC (SOC) across the East Siberian Arctic Shelves. Lignin phenol fingerprints demonstrate a longitudinal trend in relative contribution of terrestrial sources to coastal OC. Wax lipids and cutins were not detected in colloidal organic carbon (COC), in contrast to POC and SOC, suggesting that different terrestrial carbon pools partition into different aquatic carrier phases. The...
全文获取路径: ProQuest  (合作)