Methane distribution at high spatial resolution in North Sea estuaries


Contact
Ingeborg.Bussmann [ at ] awi.de

Abstract

Rivers are suspected to be a main suppliers of greenhouse gases (methane and carbon dioxide) to coastal seas, while the role of the interjacent tidal flats is still ambiguous. In this study we investigated the role of the Elbe and Weser estuaries as source of methane to the North Sea. We used high spatially resolved methane measurements from an underway degassing system and subsequent analysis with cavity ring down spectroscopy. Thus, a high-resolution representation of the methane distribution in surface waters as well as of hydrographic parameters was obtained for several cruises with two ships in 2019. For most areas, riverine methane was simply diluted by seawater, overlain by a strong tidal signal. However, on several occasions unexpectedly high methane concentrations were observed. Further detailed analysis will elucidate the role of riverine versus tidal impact on coastal North Sea methane fluxes.



Item Type
Conference (Conference paper)
Authors
Divisions
Primary Division
Programs
Primary Topic
Research Networks
Peer revision
Not peer-reviewed
Publication Status
Published
Event Details
EGU General Assembly (Sharing Geoscience Online), 04 May 2020 - 08 May 2020, Vienna.
Eprint ID
51879
DOI 10.5194/egusphere-egu2020-5241

Cite as
Bussmann, I. , Brix, H. , Fischer, P. and Flöser, G. (2020): Methane distribution at high spatial resolution in North Sea estuaries , EGU General Assembly (Sharing Geoscience Online), Vienna, 4 May 2020 - 8 May 2020 . doi: 10.5194/egusphere-egu2020-5241


Download
[img]
Preview
PDF
Bussmann_etal_D_627.pdf

Download (2MB) | Preview

Share


Citation

Research Platforms

Campaigns


Actions
Edit Item Edit Item