Results 121 to 130 of about 235,216 (266)

Coming to light: How effective are sediment gravity flows in removing fine suspended carbonate from reefs?

The Depositional Record, EarlyView.
This paper presents laboratory experiments that investigated the dynamics of mud‐grade calcite laden gravity flows, with the aim of determining how mobile these calciclastic flows are in comparison to fine‐grained cohesive and non‐cohesive siliciclastic gravity flows.
Jaco H. Baas, William Hewitt, Stephen Lokier, James Hendry   +3 more
wiley   +1 more source

Airborne dust monitoring and forecasting at the WMO SDS-WAS Regional Center for Northern Africa, Middle East and Europe [PDF]

, 2016
Ponencia presentada en: First of International Conference on Dust, 2-4 March 2016, Shahid Chamran University, Ahvaz, IranOver recent years, the scientific community has realized the importance of studying the release of mineral dust into the atmosphere ...
Terradellas, Enric
core  

Long-term variability of CO2 and O in the Mars upper atmosphere from MRO radio science data [PDF]

, 2015
We estimate the annual variability of CO2 and O partial density using approximately 6years of Mars Reconnaissance Orbiter (MRO) radio science data from August 2006 to January 2012, which cover three full Martian years (from the northern hemisphere summer
Fricke, Susan K., Genova, Antonio, Goossens, Sander, Lemoine, Frank G., Mazarico, Erwan, Smith, David E., Zuber, Maria T.   +6 more
core   +1 more source

Anatomy of modern sedimentary volcanoes produced by gas‐charged groundwater liquefaction, Lake Powell, Hite, Utah: Implications for the recognition and interpretation of ancient sedimentary volcanoes

The Depositional Record, EarlyView.
Two non‐seismically generated sedimentary volcanoes were excavated on the Colorado River delta in Lake Powell, Utah, USA, in order to characterise the internal structures. Sedimentary volcanoes are commonly employed as tools in palaeoseismic reconstruction, thus it is important to establish criteria to differentiate non‐seismic‐generated sedimentary ...
Michael C. Wizevich, Edward L. Simpson, Abigail Underwood, Laura Sherrod, Kelsey Livingston, Emily Bogner, Margariete Malenda   +6 more
wiley   +1 more source

Godzilla mineral dust and La Soufrière volcanic ash fallout immediately stimulate marine microbial phosphate uptake

Frontiers in Marine Science
During the “Godzilla” dust storm of June 2020, unusually high fluxes of mineral dust traveled across the Atlantic from the Sahara Desert, reaching the Caribbean Basin, Gulf Coast, and southeastern United States.
Hope Elizabeth Elliott, Kimberly J. Popendorf, Edmund Blades, Haley M. Royer, Clément G. L. Pollier, Amanda M. Oehlert, Ravi Kukkadapu, Andrew Ault, Cassandra J. Gaston   +8 more
doaj   +1 more source

Orbit-spin coupling and the interannual variability of global-scale dust storm occurrence on Mars [PDF]

, 2016
A new physical hypothesis predicts that a weak coupling of the orbital and rotational motions of extended bodies may give rise to a modulation of circulatory flows within their atmospheres. Driven cycles of intensification and relaxation of large-scale circulatory flows are predicted, with the phasing of these changes linked directly to the rate of ...
arxiv   +1 more source

Interglacial dust, ocean fertilisation and Neoproterozoic earth oxygenation

The Depositional Record, EarlyView.
Mineral dust is an integral part of modern ocean nutrient supply. It is originated mainly in deserts and by glacial processes. Given the global scale of the Neoproterozoic glaciations, we suggest that mineral dust formed during snowball events were blown to oceans, sustaining life, promoting CO2 sequestration and contributing to the oxygenation of ...
Leandro G. DaSilva, Peir K. Pufahl, Noel P. James   +2 more
wiley   +1 more source

The impact of dry atmospheric deposition on the sea-surface microlayer and the sub-surface layer in the SE Mediterranean Sea: an experimental approach

Frontiers in Marine Science, 2016
The oligotrophic southeastern Mediterranean Sea (SEMS) is frequently exposed to desert-dust deposition which supplies nutrients, trace metals and a wide array of viable airborne microorganisms.
Peleg Astrahan, Barak Herut, Adina Paytan, Eyal Rahav   +3 more
doaj   +1 more source

Properties of a Martian local dust storm in Atlantis Chaos from OMEGA/MEX data [PDF]

, 2017
In this study we present the analysis of the dust properties of a local storm imaged in the Atlantis Chaos region on Mars by the OMEGA imaging spectrometer on March 2nd 2005. We use the radiative transfer model MITRA to study the dust properties at solar wavelengths between 0.5 {\mu}m and 2.5 {\mu}m and infer the connection between the local storm ...
arxiv   +1 more source

Multi‐sequential order transgressive cycles from the last interglacial to the Holocene revealed by deep‐core sediment facies analysis in the Baeksu tidal deposits, south‐west coast of Korea

The Depositional Record, EarlyView.
With the aid of a chronologically well‐constrained stratigraphy, facies and sequence analyses were carried out on three drill‐cores obtained from estuarine macrotidal flats. The sequence analysis of the late Quaternary tidal deposits shows that four transgressions occurred in multi‐sequential order, whereas the intervening regressive phases were much ...
Serin Lim, Jin Cheul Kim, Dhongil Lim, Yongmi Kim, Tae Soo Chang   +4 more
wiley   +1 more source