These results echo previous findings from the Arctic ( 6) and elsewhere around Antarctica ( 7), but critically, they here relate to an area where the shelf waters connect strongly with the abyss, so the shallow processes can have a deep and pervasive impact. During the fast drawdown stage, MH was observed to dissociate rapidly, and the gas released from dissociation quickly increases the gas phase saturation from S G 0.02 to 0.20. It was noted that strong wind events (gusts exceeding 15 ms −1) were critical in causing frazil formation and that it can occur to unexpected depths (80 m or more). The fast drawdown rate led to a fast draining of free water in the hydrate-bearing system and is evidenced by a sudden decrease in S A from 0.55 to 0.45 at the start. 1 The study aimed to understand the methane (CH 4) emission and its controlling factors in the Three Gorges Reservoir Region and to explore its implication for large dams. By joining the Pledge, countries commit to work together in. Led by the United States and the European Union, the Pledge now has 111 country participants who together are responsible for 45 of global human-caused methane emissions. ![]() ( 3) reveal repeated occurrences of supercooling in the Cape Darnley polynya, and by monitoring the interior of the ocean acoustically, they observe that frazil ice dominates ice production here. The Global Methane Pledge was launched at COP26 in November 2021 to catalyse action to reduce methane emissions. Frazil ice can form near the surface where the water is in a turbulent state, with the heat exchange between the atmosphere and ocean allowing supercooling to occur, and it was recently noted that supercooled waters are far more widespread across the Southern Ocean than previously thought ( 5). Methane (CH 4) Methane has long been considered a harbinger of climate catastrophe.According to NASA, what we know for sure is that a lot more methane (CH 4) has made its way into the atmosphere since the beginning of the Industrial Revolution. This can happen where water is cooled by the underside of floating ice shelves, and intense pressure keeps it liquid. Frazil ice is well known to Antarctic oceanographers it forms as irregularly shaped crystals where the temperature of seawater is reduced below its typical surface freezing point. ( 3) demonstrate the importance of underwater frazil ice to dense water production. ![]() Project Methane related iron reduction processes in sediments: Hidden couplings and their. Using satellite observations and data from year-round oceanographic moorings, Ohshima et al. Project Ice Nucleating Particles in the Marine Atmosphere.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |