1 to 4 of 4 Results
Jun 7, 2023 - Biogeochemistry
Klintzsch, Thomas; Geisinger, Hannah; Wieland, Anna; Langer, Gerald; Nehrke, Gernot; Bizic, Mina; Greule, Markus; Lenhart, Katharina; Borsch, Christian; Schroll, Moritz; Keppler, Frank, 2023, "Stable Carbon Isotope Signature of Methane Released from Phytoplankton [Research Data]", https://doi.org/10.11588/data/YYLEKU, heiDATA, V1, UNF:6:CUTgXYoCIx59M/OKIgTRvQ== [fileUNF]
Aquatic ecosystems play an important role in global methane cycling and many field studies have reported methane supersaturation in the oxic surface mixed layer (SML) of the ocean and in the epilimnion of lakes. The origin of methane formed under oxic condition is hotly debated a... |
Nov 4, 2022 - Biogeochemistry
Einzmann, Teresa; Schroll, Moritz; Kleint, Jan Frederik; Greule, Markus; Keppler, Frank, 2022, "Application of concentration and 2-dimensional stable isotope measurements of methane to constrain sources and sinks in a seasonally stratified freshwater lake [data]", https://doi.org/10.11588/data/KLFDVF, heiDATA, V1, UNF:6:v5med6vrABS01PP8hfg5JQ== [fileUNF]
Methane (CH4) emissions from aquatic systems have recently been comprised to account for up to 50 % of global CH4 emissions, with lakes representing one of the largest CH4 source within this pool. However, there is large uncertainty associated with CH4 emissions from freshwater e... |
Aug 9, 2022 - Biogeochemistry
Wieland, Anna; Greule, Markus; Roemer, Philipp; Esper, Jan; Keppler, Frank, 2022, "Climate signals in stable carbon and hydrogen isotopes of lignin methoxy groups from southern German beech trees [data]", https://doi.org/10.11588/data/ZCMVUY, heiDATA, V1, UNF:6:U4nXcHYDxhl9ro8YQIcHsA== [fileUNF]
Stable hydrogen and carbon isotope ratios of wood lignin methoxy groups (δ13CLM and δ2HLM values) have been shown to be reliable proxies of past temperature variations. Previous studies showed that δ2HLM values even work in temperate environments where classical tree-ring width a... |
Jun 26, 2020 - Biogeochemistry
Schroll, Moritz; Keppler, Frank; Greule, Markus; Eckhardt, Christian; Zorn, Holger; Lenhart, Katharina, 2020, "The stable carbon isotope signature of methane produced by saprotrophic fungi [Dataset]", https://doi.org/10.11588/data/DQYPMC, heiDATA, V1, UNF:6:2wuTVqMthe55Z6quzuhvRQ== [fileUNF]
Fungi have recently been identified to produce the greenhouse gas methane. Here, we investigated the stable carbon isotope values of methane produced by saprotrophic fungi. Our results show that stable isotope values of methane by fungi are dependent on the fungal species and the... |