Transport of carbon dioxide and heavy metals from hydrothermal vents to shallow water by hydrate-coated gas bubbles

摘要: Abstract Deep-sea hydrothermal plumes are of major importance in the biogeochemical ocean cycles and this study we focus on emitted from Jan Mayen vent fields Norwegian-Greenland Sea. These interest because high CO2 concentrations also due to different styles venting occurring here. Venting at these sites occurs between 550 700 m depth is characterized by release hydrate coated bubbles as well focused flow venting. This aims enhance our current understanding impact rich water column interaction hydrothermally derived gases metals column. Three surveys were conducted area 2012 2014, which non-buoyant plume (NBP) produced both Troll Wall Perle & Bruse was identified primordial helium (3He), methane (CH4), carbon dioxide (CO2) dissolved manganese (Mn) enrichments close 500 m depth. Our results show that increases bubble rise height, shallow acidification locally above sites. A polymetallic anomaly mid-depth NBP hypothesized be a result bubbles. We argue nanoparticles get sequestered lattice travel with until becomes unstable gas expansion upon depressurization during ascent. process could fuel primary production pelagic