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Modeling the paleocirculation of the Mediterranean: The Last Glacial Maximum and the Holocene with emphasis on the formation of sapropel S1
Download1998
Myers, Paul G., Rohling, Eelco J., Haines, Keith
An ocean general circulation model is used to simulate the thermohaline circulation in the Mediterranean sea during the last glacial maximum and the Holocene, when the sapropel S1 was deposited. The model is forced by prescribed surface temperatures and salinities, where present-day values lead...
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Modern travertine precipitation at Lýsuhóll hot springs, Snæfellnes, Iceland: implications for calcite crystal growth.
Download2017-01-01
Three thermal springs, at Lýsuhóll on Snæfellnes Peninsula on the west coast of Iceland, with vent water temperatures of 20 to 46°C are characterized by thriving microbial mats that mediate the precipitation of opal-A, Fe-rich opal-A, Fe-rich reticulate coatings, and calcite that are intermixed...
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Movies of River Water Tracers in ANHA4 NEMO Simulation
2024-01-01
Online passive tracers for river runoff input from the ANHA4 ocean model. EPM015 is was run with Dai and Trenberth for river runoff, and EPM151 was run with A-HYPE for river runoff. Both have a forced atmosphere from CGRF. The difference between the two tracers can also be seen, where positive...
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N2 in deep subsurface fracture fluids of the Canadian Shield: Source and possible recycling processes
Download2021-12-20
Li, Long, Li, Kan, Giunta, Thomas, Warr, Oliver, Labidi, Jabrane, Lollar, Barbara Sherwood
In addition to high concentrations of CH4 and H2, abundant dissolved N2 is found in subsurface fracture fluids in Precambrian cratons around the world. These fracture fluids have hydrogeological isolation times on order of thousands to millions and even billions of years. Assessing the sources...
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2015-01-01
Donovan, S.K., Jones, B., Harper, D.A.T.
The first fossil echinoids are recorded from the Cayman Islands. A regular echinoid, Arbacia? sp., the spatangoids Brissus sp. cf. B. oblongus Wright and Schizaster sp. cf. S. americanus (Clark), and the clypeasteroid Clypeaster sp. are from the Middle Miocene Cayman Formation. Test fragments of...
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2010-03-01
Collins, Damian, Kearns, Robin
This report documents and analyses stakeholder perspectives on the status and future of the Ngunguru sandspit, with a focus on how interested parties perceive and value the landscape. Our research took place at a time when a major development was proposed for the sandspit by its private owners,...
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Nitrogen isotope fractionations among gaseous and aqueous NH4+, NH3, N2, and metal-ammine complexes: Theoretical calculations and applications
Download2021-02-15
Li, Long, He, Yuyang, Zhang, Zhe, Liu, Yun
Ammonium (NH4+), ammonia (NH3) and N2 are key nitrogen species in geological nitrogen recycling. NH3 has also been proposed to play an important role in mobilizing base metals in the form of metal-ammine complexes in hydrothermal fluids. The nitrogen isotope fractionation factors among these...
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On the importance of the choice of wind stress forcing to the modeling of the Mediterranean Sea circulation
Download1998
Myers, Paul G., Josey, Simon, Haines, Keith
A 1/4° degree ocean general circulation model is used to examine the role that four different wind stress climatologies play on the circulation of the Mediterranean. The wind stress climatologies examined are those derived from numerical weather prediction models (National Meteorological Center...