Near-surface particle size distribution profiles over the North Sea

1987 ◽  
Vol 92 (C13) ◽  
pp. 14631 ◽  
Author(s):  
G. de Leeuw
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
North Sea ◽  
Near Surface ◽  
The North ◽  
The North Sea ◽  
Surface Particle

scholarly journals Evidence of an elevated source of nucleation based on model simulations and data from the NIFTy experiment

2012 ◽  
Vol 12 (17) ◽  
pp. 8021-8036 ◽  
Author(s):  
P. Crippa ◽  
T. Petäjä ◽  
H. Korhonen ◽  
G. S. El Afandi ◽  
S. C. Pryor
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Ultrafine Particle ◽  
Ground Level ◽  
Particle Formation ◽  
Atmospheric Conditions ◽  
New Particle Formation ◽  
Near Surface ◽  
Nocturnal Inversion

Abstract. New particle formation has been observed at a number of ground-based measurement sites. Prior research has provided evidence that this new particle formation, while observed in the near-surface layer, is actually occurring in atmospheric layers above the surface and appears to be focused in or close to the residual layer formed by the nocturnal inversion. Here, we present both observations and modeling for southern Indiana which support this postulate. Based on simulations with a detailed aerosol dynamics model and the Weather Research and Forecasting model, along with data from ground-based remote sensing instruments and detailed gas and particle phase measurements, we show evidence that (i) the maximum rate change of ultrafine particle concentrations as observed close to the surface is always preceded by breakdown of the nocturnal inversion and enhancement of vertical mixing and (ii) simulated particle size distributions exhibit greatest accord with surface observations during and subsequent to nucleation only when initialized with a particle size distribution representative of clear atmospheric conditions, rather than the in situ (ground-level) particle size distribution.

Near-surface shear-wave birefringence in the North Sea: Ekofisk 2D/4C test

2003 ◽  
Vol 22 (12) ◽  
pp. 1236-1242 ◽  
Author(s):  
Richard R. Van Dok ◽  
James E. Gaiser ◽  
Grant Byerley
Keyword(s):  
Shear Wave ◽  
North Sea ◽  
Surface Shear ◽  
Near Surface ◽  
The North ◽  
The North Sea ◽  
Surface Shear Wave

scholarly journals Impurities Accumulation on the Surface of Alumina Hydrate Particles in Bayer Technology

2019 ◽  
Vol 70 (2) ◽  
pp. 355-360
Author(s):  
Gheorghe Dobra ◽  
Sorin Iliev ◽  
Nicolae Anghelovici ◽  
Lucian Cotet ◽  
Laurentiu Filipescu
Keyword(s):  
Particle Size ◽  
Liquid Phase ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Alumina Hydrate ◽  
Surface Particle ◽  
Structural Surface ◽  
The Common ◽  
Metallic Impurities ◽  
Crystallization Stage

The purity, structural surface, particle dimensions, particle size distribution, and the associated reactivity of chemical and surface properties are the most important and most required properties of alumina hydrate special brands. The purpose of this paper concerns the common metallic impurities accumulation on the surface of alumina hydrate particles, during the sodium aluminates decomposition in liquid phase, during the entire aluminum hydroxide crystallization stage in the Bayer technology.

Unravelling the Near Surface by Imaging Multiples and Shallow Hazard Analysis in the North Sea

2020 ◽  
Author(s):  
M. Yanez Sanchez ◽  
P. Smith ◽  
D. Barlass ◽  
P. Kristiansen ◽  
D. Brager ◽  
...  
Keyword(s):  
North Sea ◽  
Hazard Analysis ◽  
Near Surface ◽  
The North ◽  
The North Sea
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