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geochemistry

This category contains 6 posts
Figure 2: Kavachi Eruption: Image courtesy of Submarine Ring of Fire 2002: Explorer Ridge. https://upload.wikimedia.org/wikipedia/commons/0/0a/May_14_Kavachi_eruption.jpg

Sharkcano, a melting pot for biology

No, a Sharkcano is not a volcano that erupts sharks. IT IS WAY COOLER THAN THAT! It is a submarine volcano that hosts a diverse macro community in water that is much warmer and more acidic that the surrounding seawater. Read more to find out about this alien-esc ecosystem in the South Pacific Ocean.

Complete nitrification by a single bacterium - kind of a big deal, guys!

One to tango: a bacterium that does the work of two in the nitrogen cycle

Scientists report bacterial species capable of performing the two-step process of nitrification, traditionally thought to exist only as a division of labor between two functionally distinct bacteria.

http://www.sportdiver.com/article/news/global-reef-expeditions-assess-coral-reef-health

How a whole reef community’s response to OA is impacted by the individual responses of different players

Researchers from California used a unique ex situ experiment to monitor two near identical reef communities in different concentrations of dissolved carbon dioxide to observe the unique responses of community members and their roles in the whole community response.

http://oceanexplorer.noaa.gov/okeanos/explorations/ex1104/logs/dailyupdates/media/daily_updates_aug14_600.jpg

What is the source of organic molecules in Von Damm vent fluids?

The origin of life is with out a doubt a fascinating topic of discussion and debate, intensified by the fact that there is no definitive answer (yet). A group of WHOI scientists present a mechanism and environment where organic compounds can be formed from inorganic ones via abiotic production. The plausibility of their suggestion is strengthened by the present day occurrence of said mechanisms in hot spreading centers where ocean plates are formed at the bottom of the ocean.

Changes in Temperature and CO2 over the past 422,000 years. Data obtained from Vostok ice cores in Antarctica. Credit: NOAA.

Balancing Act: Marine Sediments Reveal Past Carbon Cycle Fluxes

Researchers conducted a study that looks at marine sediment records to investigate sediment weathering patterns over long-term climate cycles. Somewhat surprisingly, it appears the Earth may have a mechanism for balancing variations in weathering during these glacial-interglacial cycles and mediating carbon cycle fluxes.

http://people.clarkson.edu/~pyapa/Thermovent/smoker.jpg

Happy Samples

How frustrating it must be to spend a bunch of money to get to the field, only to find out the samples collected were contaminated. This piece reviews the effort of a group of science engineers from China to eliminate sample contamination when collecting hydrothermal vent fluids in shallow waters.

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