نتایج جستجو برای: marine sedimentation

تعداد نتایج: 110234  

2018
Hugo Pouderoux Jean-Noël Proust Geoffroy Lamarche Alan Orpin

10 Recent sedimentation along the Hikurangi subduction margin off northeastern New Zealand is 11 investigated using a series of piston cores collected between 2003 and 2008. The active Hikurangi 12 Margin lies along the Pacific-Australia subduction plate boundary and contains a diverse range of 13 geomorphologic settings. Slope basin stratigraphy is thick and complex, resulting from sustained h...

2007
C. S. Bretherton P. N. Blossey J. Uchida

[1] The effect of cloud droplet sedimentation on the entrainment rate and liquid water path of a nocturnal nondrizzling stratocumulus layer is examined using largeeddy simulations (LES) with bulk microphysics. In agreement with a prior study by Ackerman et al. (2004), sedimentation is found to decrease entrainment rate and thereby increase liquid water path. They suggested this is due to reduct...

2002
Hema Achyuthan V R Baker

Geomorphology, clay mineral composition, and radiocarbon dates from Muttukadu to Marakkanam estuaries and the tidal zone along the east coast of Tamil Nadu, India, have been used to reconstruct coastal evolution between approximately 4500 and 1100 BP. Formation of alternate oyster beds with intervening tidal clay units indicate fluctuation in the sea level may be a consequence of changes in the...

2008
N. DS. GANI M. G. ABDELSALAM S. GERA M. R. GANI

The Blue Nile Basin, situated in the Northwestern Ethiopian Plateau, contains 1400 m thick Mesozoic sedimentary section underlain by Neoproterozoic basement rocks and overlain by Early–Late Oligocene and Quaternary volcanic rocks. This study outlines the stratigraphic and structural evolution of the Blue Nile Basin based on field and remote sensing studies along the Gorge of the Nile. The Blue ...

Journal: :Marine pollution bulletin 2014
Frederick T Short Robert Coles Miguel D Fortes Steven Victor Maxwell Salik Irwan Isnain Jay Andrew Aganto Seno

Seagrass systems of the Western Pacific region are biodiverse habitats, providing vital services to ecosystems and humans over a vast geographic range. SeagrassNet is a worldwide monitoring program that collects data on seagrass habitats, including the ten locations across the Western Pacific reported here where change at various scales was rapidly detected. Three sites remote from human influe...

2006
R. E. Cranston

Data from the Ocean Drilling Program and from other marine studies are used to relate organic carbon flux preserved in the seabed with the uptake of sulfate and production of ammonia in the pore water of the sediment column. Relationships are derived that can be used to estimate recent sedimentation rates to within one order of magnitude, spanning the range from 0.1 to 100,000 m/m.y. The relati...

Journal: :Marine pollution bulletin 2015
Sophie M Vonk David J Hollander AlberTinka J Murk

During the Deepwater Horizon blowout, thick layers of oiled material were deposited on the deep seafloor. This large scale benthic concentration of oil is suggested to have occurred via the process of Marine Oil Snow Sedimentation and Flocculent Accumulation (MOSSFA). This meta-analysis investigates whether MOSSFA occurred in other large oil spills and identifies the main drivers of oil sedimen...

2013
Jean-Noël Proust Geoffroy Lamarche Alan Orpin

10 Recent sedimentation along the Hikurangi subduction margin off northeastern New Zealand is 11 investigated using a series of piston cores collected between 2003 and 2008. The active Hikurangi 12 Margin lies along the Pacific-Australia subduction plate boundary and contains a diverse range of 13 geomorphologic settings. Slope basin stratigraphy is thick and complex, resulting from sustained h...

Journal: :Radiation protection dosimetry 2012
Branko Petrinec Zdenko Franic Nikolina Ilijanic Slobodan Miko Marko Strok Borut Smodis

(137)Cs activity concentrations were studied in the sediment profiles collected at five locations in the Middle and South Adriatic. In the sediment profiles collected from the South Adriatic Pit, the deepest part of the Adriatic Sea, two (137)Cs peaks were identified. The peak in the deeper layer was attributed to the period of intensive atmospheric nuclear weapon tests (early 1960s), and the o...

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