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SUMMARY:The study of the aerosol impurities seasonal accumulation in a sno
 w cover by scanning µXRF-SR.
DTSTART;VALUE=DATE-TIME:20200713T140300Z
DTEND;VALUE=DATE-TIME:20200713T140400Z
DTSTAMP;VALUE=DATE-TIME:20260419T143052Z
UID:indico-contribution-1822@indico.inp.nsk.su
DESCRIPTION:Speakers: Andrey Darin (Sobolev Institute of Geology and Miner
 alogy SB RAS)\nSnow cover is an ideal deposition medium in which aerosol p
 articles of both natural and technogenic origin are fixed and accumulated 
 during the winter period. As a rule\, environmental studies analyze the to
 tal amount of aerosol accumulated. This paper presents a study of the aero
 sol accumulation dynamics in the vertical section of snow cover with high 
 spatial (temporal) resolution.\nSampling over the entire height of the sno
 w cover accumulated during November 2019 - March 2020 was carried out on t
 he Novosibirsk region territory using polypropylene pipes with a diameter 
 of 100 mm and a length of 1 m. The cores were selected to the entire depth
  of the snow cover to the base. After that\, the pipe was shut up from bel
 ow by a tight stopper\, and from above the snow was pressed by the top sto
 pper to a total core height of 40 cm. This was done to achieve a uniform s
 now density over the entire core height. Mixing of snow layers did not occ
 ur. Samples were transported to the laboratory of the IGM SB RAS in a froz
 en state. The pipes were opened along the sampling axis and placed horizon
 tally in a plastic box\, cooled with liquid nitrogen. Snow sublimated duri
 ng the day without the formation of a liquid phase. The solid components r
 emaining in the pipe were transferred onto a conductive adhesive tape with
 out disturbing their vertical distribution.\nThe analysis was carried out 
 using the µXRF-SR according to the standard certified method at the exper
 imental station "Elemental analysis" in the shared research center SSTRC. 
 Experimental conditions: excitation energy 23 keV\, dimensions of the exci
 ting radiation beam 1.0 mm in height and 10 mm in width of the sample. The
  scanning step was 1 mm in height of the sample. The distributions of more
  than 20 rock-forming and trace elements over the sample depth were obtain
 ed. The data obtained make it possible to calculate the dynamics of aeroso
 l accumulation. Analysis of individual particles is used to identify their
  sources.\nThe work was carried out in the framework of the RFBR projects 
 no. 19-05-50046. The work was done at the shared research center SSTRC on 
 the basis of the VEPP-4-VEPP-2000 complex at BINP SB RAS\, using equipment
  supported by project RFMEFI62119X0022.\n\nhttps://indico.inp.nsk.su/event
 /24/contributions/1822/
LOCATION:
URL:https://indico.inp.nsk.su/event/24/contributions/1822/
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