FN Archimer Export Format PT J TI Impact of tides and sea-level on deep-sea Arctic methane emissions BT AF Sultan, Nabil Plaza-Faverola, Andreia Vadakkepuliyambatta, Sunil Buenz, Stefan Knies, Jochen AS 1:1;2:2;3:2;4:2;5:2,3; FF 1:PDG-REM-GM-LAD;2:;3:;4:;5:; C1 Ifremer, Département REM, Unité des Géosciences Marines, F-29280, Plouzané, France Centre for Arctic Gas Hydrate, Environment and Climate, Department of Geosciences, UiT-The Arctic University of Norway in Tromsø, Tromsø, Norway Geological Survey of Norway, NO-7491, Trondheim, Norway C2 IFREMER, FRANCE UNIV ARCTIC UIT NORWAY, NORWAY GEOL SURVEY NORWAY, NORWAY SI BREST SE PDG-REM-GM-LAD IN WOS Ifremer UPR DOAJ copubli-europe IF 14.919 TC 28 UR https://archimer.ifremer.fr/doc/00654/76564/77690.pdf https://archimer.ifremer.fr/doc/00654/76564/77691.pdf https://archimer.ifremer.fr/doc/00654/76564/77692.pdf LA English DT Article AB Sub-sea Arctic methane and gas hydrate reservoirs are expected to be severely impacted by ocean temperature increase and sea-level rise. Our understanding of the gas emission phenomenon in the Arctic is however partial, especially in deep environments where the access is difficult and hydro-acoustic surveys are sporadic. Here, we report on the first continuous pore-pressure and temperature measurements over 4 days in shallow sediments along the west-Svalbard margin. Our data from sites where gas emissions have not been previously identified in hydro-acoustic profiles show that tides significantly affect the intensity and periodicity of gas emissions. These observations imply that the quantification of present-day gas emissions in the Arctic may be underestimated. High tides, however, seem to influence gas emissions by reducing their height and volume. Hence, the question remains as to whether sea-level rise may partially counterbalance the potential threat of submarine gas emissions caused by a warmer Arctic Ocean. PY 2020 PD OCT SO Nature Communications SN 2041-1723 PU Springer Science and Business Media LLC VL 11 IS 1 UT 000581916500001 DI 10.1038/s41467-020-18899-3 ID 76564 ER EF