scholarly journals Supplementary material to "Representing Low-Intensity Fire Sensible Heat Output in a Mesoscale Atmospheric Model with a Canopy Submodel: A Case Study with ARPS-CANOPY (version 5.2.12)"

Author(s):  
Michael T. Kiefer ◽  
Warren E. Heilman ◽  
Shiyuan Zhong ◽  
Joseph J. Charney ◽  
Xindi Bian ◽  
...  
2018 ◽  
Author(s):  
Maksim Iakunin ◽  
Rui Salgado ◽  
Miguel Potes

Abstract. Natural lakes and big artificial reservoirs could affect the weather regime of surrounding areas but usually it is difficult to track all aspects of this impact and evaluate its magnitude. Alqueva reservoir, the largest artificial lakes in Western Europe located on the South-East of Portugal, was filled in 2004. This makes it a large laboratory and allows to study the changes in hydrological and geological structures and how they affect the weather in the region. This paper is focused on a case study of the 3 days period of 22–24 July 2014. In order to quantify the breeze effects induced by Alqueva reservoir two simulations with the mesoscale atmospheric model Meso-NH coupled to FLake freshwater lake scheme has been done. The principal difference of this two simulations is in the presence of the reservoir in the input surface data. Comparing two simulations datasets: with and without reservoir, net results of the lake impact were obtained. Magnitude of the impact on the air temperature, relative humidity, and other atmospheric parameters is shown. Clear effect of a lake breeze (5–7 m/s) can be observed during the daytime on the distances up to 6 km away from the shores and up to 300 m over the lake surface. Breeze system starts to form at 9:00 UTC and dissipates at 18:00–19:00 UTC with the arrival of major Atlantic breeze system. It induces specific air circulation that captures the dry air from the upper atmosphere (2–2.5 km) which follows the downstream and redistributes over the lake. It is also shown that the although the impact can be relatively intensive, its area is limited by several kilometers away from the lake borders.


2017 ◽  
Author(s):  
Raphael Schneeberger ◽  
Miguel De la Varga ◽  
Daniel Egli ◽  
Alfons Berger ◽  
Florian Kober ◽  
...  

2021 ◽  
pp. geochem2021-051
Author(s):  
Sarah Hashmi ◽  
Matthew I. Leybourne ◽  
Stewart Hamilton ◽  
Daniel Layton-Matthews ◽  
M. Beth McClenaghan

A geochemical study over the southwestern part of the South Range of the Sudbury Igneous Complex (SIC) was completed to assess the suitability of surficial media (humus, B-horizon soil and C-horizon soil) for delineating geochemical anomalies associated with Ni-Cu-PGE mineralization. Another objective was to test whether Na pyrophosphate can eliminate the effects of anthropogenic contamination in humus. Results of this study suggest that the natural geochemical signature of humus is strongly overprinted by anthropogenic contamination. Despite no indication of underlying or nearby mineralization, metal concentrations in humus samples by aqua regia collected downwind from smelting operations are higher compared to background, including up to 13 times higher for Pt, 12 times higher for Cu and 9 times higher for Ni. The high anthropogenic background masks the geogenic signal such that it is only apparent in humus samples collected in the vicinity of known Ni-Cu-PGE deposits. Results of this study also demonstrate that anthropogenically-derived atmospheric fallout also influences the upper B-horizon soil; however, lower B-horizon soil (at > 20 cm depth) and C-horizon soil (both developed in till) are not affected. Glacial dispersal from Ni-Cu-PGE mineralization is apparent in C-horizon till samples analyzed in this study. Compared to the background concentrations, the unaffected C-horizon till samples collected immediately down-ice of the low-sulfide, high precious metal (LSHPM) Vermilion Cu-Ni-PGE deposit are enriched over 20 times in Pt (203 ppb), Au (81 ppm) and Cu (963 ppm), and over 30 times in Ni (1283 ppm).Supplementary material:https://doi.org/10.6084/m9.figshare.c.5691080


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