scholarly journals Comment on “Investigating the Macrodispersion Experiment (MADE) site in Columbus, Mississippi, using a three-dimensional inverse flow and transport model” by Heidi Christiansen Barlebo, Mary C. Hill, and Dan Rosbjerg

2006 ◽  
Vol 42 (6) ◽  
Author(s):  
Fred J. Molz ◽  
Chunmiao Zheng ◽  
Steven M. Gorelick ◽  
Charles F. Harvey
Keyword(s):  
Transport Model ◽  
Three Dimensional ◽  
Flow And Transport

A FLOW AND TRANSPORT MODEL AS A TOOL FOR SOLVING THE PROBLEM OF GROUNDWATER POLLUTION IN THE VICINITY OF CELSA HUTA OSTROWIEC

2018 ◽  
Vol 471 ◽  
pp. 147-158
Author(s):  
Grzegorz SINICYN ◽  
Maria GRODZKA-ŁUKASZEWSKA
Keyword(s):  
Environmental Problem ◽  
Transport Model ◽  
Water Environment ◽  
Three Dimensional ◽  
Pollution Source ◽  
Transport Models ◽  
Flow And Transport ◽  
Model Studies ◽  
Contaminant Release ◽  
Soil And Water

The article presents the environmental problem that occurred in the vicinity of Celsa Huta Ostrowiec, where concentrations of trichloroethene and tetrachloroethene in wells were detected. The three-dimensional numerical groundwater flow and transport models were calibrated against trichloroethene measurements. Model studies were carried out for different scenarios taking into account the type of pollution source (point and spatial distributed) and the nature of the source itself (incidental and continuous in time). The modelling results made it possible to indicate the most likely place and time of contaminant release into the soil and water environment.

scholarly journals Energetic particle induced intra-seasonal variability of ozone inside the Antarctic polar vortex observed in satellite data

2015 ◽  
Vol 15 (6) ◽  
pp. 3327-3338 ◽  
Author(s):  
T. Fytterer ◽  
M. G. Mlynczak ◽  
H. Nieder ◽  
K. Pérot ◽  
M. Sinnhuber ◽  
...  
Keyword(s):  
Geomagnetic Activity ◽  
Seasonal Variability ◽  
Transport Model ◽  
Three Dimensional ◽  
Polar Vortex ◽  
Quiet Time ◽  
Significance Level ◽  
Antarctic Polar Vortex ◽  
Ap Index ◽  
The Antarctic

Abstract. Measurements from 2002 to 2011 by three independent satellite instruments, namely MIPAS, SABER, and SMR on board the ENVISAT, TIMED, and Odin satellites are used to investigate the intra-seasonal variability of stratospheric and mesospheric O3 volume mixing ratio (vmr) inside the Antarctic polar vortex due to solar and geomagnetic activity. In this study, we individually analysed the relative O3 vmr variations between maximum and minimum conditions of a number of solar and geomagnetic indices (F10.7 cm solar radio flux, Ap index, ≥ 2 MeV electron flux). The indices are 26-day averages centred at 1 April, 1 May, and 1 June while O3 is based on 26-day running means from 1 April to 1 November at altitudes from 20 to 70 km. During solar quiet time from 2005 to 2010, the composite of all three instruments reveals an apparent negative O3 signal associated to the geomagnetic activity (Ap index) around 1 April, on average reaching amplitudes between −5 and −10% of the respective O3 background. The O3 response exceeds the significance level of 95% and propagates downwards throughout the polar winter from the stratopause down to ~ 25 km. These observed results are in good qualitative agreement with the O3 vmr pattern simulated with a three-dimensional chemistry-transport model, which includes particle impact ionisation.

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