Replication Data for: High-resolution underwater laser spectrometer sensing provides new insights into methane distribution at an Arctic seepage site ...

• Main Authors: Jansson, Pär, Triest, Jack, Grilli, Roberto, Ferré, Benedicte, Silyakova, Anna, Mienert, Jürgen, Chappellaz, Jérôme
• Format: Dataset
• Language: unknown
• Published: DataverseNO 2019
• Subjects: Arctic; Ocean acidification; Svalbard
• Online Access: https://dx.doi.org/10.18710/uwp6ll; https://dataverse.no/citation?persistentId=doi:10.18710/UWP6LL

Abstract: Methane (CH4) in marine sediments has the potential to contribute to changes in the ocean- and climate system. Physical and biochemical processes that are difficult to quantify with current standard methods such as acoustic surveys and discrete sampling govern the distribution of dissolved CH4 in oceans and lakes. Detailed observations of aquatic CH4 concentrations are required for a better understanding of CH4 dynamics in the water column, how it can affect lake- and ocean acidification, the chemosynthetic ecosystem, and mixing ratios of atmospheric climate gases. Here we present pioneering high-resolution in-situ measurements of dissolved CH4 throughout the water column over a 400 m deep CH4 seepage area at the continental slope west of Svalbard. A new fast-response under-water membrane-inlet laser spectrometer sensor demonstrates technological advances and breakthroughs for ocean measurements. We reveal decametre-scale variations of dissolved CH4 concentrations over the CH4 seepage zone. ...