Evaporating brine from frost flowers with electron microscopy
and implications for atmospheric chemistry and sea-salt aerosol
formation

J 2017

Evaporating brine from frost flowers with electron microscopy and implications for atmospheric chemistry and sea-salt aerosol formation

YANG, Xin, Vilém NEDĚLA, Jiří RUNŠTUK, Gabriela ONDRUŠKOVÁ, Ján KRAUSKO et. al.

Základní údaje

Originální název

Evaporating brine from frost flowers with electron microscopy and implications for atmospheric chemistry and sea-salt aerosol formation

Autoři

YANG, Xin (826 Velká Británie a Severní Irsko), Vilém NEDĚLA (203 Česká republika), Jiří RUNŠTUK (203 Česká republika), Gabriela ONDRUŠKOVÁ (703 Slovensko, domácí), Ján KRAUSKO (703 Slovensko, domácí), Ľubica VETRÁKOVÁ (703 Slovensko, domácí) a Dominik HEGER (203 Česká republika, garant, domácí)

Vydání

Atmospheric Chemistry and Physics, GOTTINGEN, COPERNICUS GESELLSCHAFT MBH, 2017, 1680-7316

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10509 Meteorology and atmospheric sciences

Stát vydavatele

Německo

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Impakt faktor

Impact factor: 5.509

Kód RIV

RIV/00216224:14310/17:00095496

Organizační jednotka

Přírodovědecká fakulta

DOI

http://dx.doi.org/10.5194/acp-17-6291-2017

UT WoS

000401921300001

Klíčová slova anglicky

EXPERIMENTAL-COMPUTATIONAL APPROACH; AQUEOUS-SOLUTIONS; BOUNDARY-LAYER; BLOWING SNOW; SPECTROSCOPIC PROPERTIES; LOW-TEMPERATURES; OZONE DEPLETION; ICE NUCLEATION; HEXAGONAL ICE; IN-SITU

Štítky

NZ, rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 3. 4. 2018 15:11, Ing. Nicole Zrilić

Anotace

V originále

An environmental scanning electron microscope (ESEM) was used for the first time to obtain well-resolved images, in both temporal and spatial dimensions, of lab-prepared frost flowers (FFs) under evaporation within the chamber temperature range from -5 to -18 degrees C and pressures above 500 Pa. Our scanning shows temperature-dependent NaCl speciation: the brine covering the ice was observed at all conditions, whereas the NaCl crystals were formed at temperatures below -10 degrees C as the brine oversaturation was achieved. Finger-like ice structures covered by the brine, with a diameter of several micrometres and length of tens to 100 mu m, are exposed to the ambient air. The brine-covered fingers are highly flexible and cohesive. The exposure of the liquid brine on the micrometric fingers indicates a significant increase in the brine surface area compared to that of the flat ice surface at high temperatures; the NaCl crystals formed can become sites of heterogeneous reactivity at lower temperatures. There is no evidence that, without external forces, salty FFs could automatically fall apart to create a number of sub-particles at the scale of micrometres as the exposed brine fingers seem cohesive and hard to break in the middle. The fingers tend to combine together to form large spheres and then join back to the mother body, eventually forming a large chunk of salt after complete dehydration. The present microscopic observation rationalizes several previously unexplained observations, namely, that FFs are not a direct source of sea-salt aerosols and that saline ice crystals under evapora-tion could accelerate the heterogeneous reactions of bromine liberation.

Návaznosti

GA15-12386S, projekt VaV

Název: Dynamika a (foto)chemie polutantů na rozhraních led/vzduch a voda/vzduch z experimentu i teorie

Investor: Grantová agentura ČR, Dynamika a (foto)chemie polutantů na rozhraních led/vzduch a voda/vzduch z experimentu i teorie

LM2011028, projekt VaV

Název: RECETOX ? Národní infrastruktura pro výzkum toxických látek v prostředí

Investor: Ministerstvo školství, mládeže a tělovýchovy ČR, RECETOX Národní infrastruktura pro výzkum toxických látek v prostředí

LO1214, projekt VaV

Název: Centrum pro výzkum toxických látek v prostředí (Akronym: RECETOX)

Investor: Ministerstvo školství, mládeže a tělovýchovy ČR, Centrum pro výzkum toxických látek v prostředí

Citovat

YANG, Xin, Vilém NEDĚLA, Jiří RUNŠTUK, Gabriela ONDRUŠKOVÁ, Ján KRAUSKO, Ľubica VETRÁKOVÁ a Dominik HEGER. Evaporating brine from frost flowers with electron microscopy and implications for atmospheric chemistry and sea-salt aerosol formation. Atmospheric Chemistry and Physics. GOTTINGEN: COPERNICUS GESELLSCHAFT MBH, 2017, roč. 17, č. 10, s. 6291-6303. ISSN 1680-7316. Dostupné z: https://dx.doi.org/10.5194/acp-17-6291-2017.

@article{1408051,
   author = {Yang, Xin and Neděla, Vilém and Runštuk, Jiří and Ondrušková, Gabriela and Krausko, Ján and Vetráková, Ľubica and Heger, Dominik},
   article_location = {GOTTINGEN},
   article_number = {10},
   doi = {http://dx.doi.org/10.5194/acp-17-6291-2017},
   keywords = {EXPERIMENTAL-COMPUTATIONAL APPROACH; AQUEOUS-SOLUTIONS; BOUNDARY-LAYER; BLOWING SNOW; SPECTROSCOPIC PROPERTIES; LOW-TEMPERATURES; OZONE DEPLETION; ICE NUCLEATION; HEXAGONAL ICE; IN-SITU},
   language = {eng},
   issn = {1680-7316},
   journal = {Atmospheric Chemistry and Physics},
   title = {Evaporating brine from frost flowers with electron microscopy and implications for atmospheric chemistry and sea-salt aerosol formation},
   url = {https://www.atmos-chem-phys.net/17/6291/2017/},
   volume = {17},
   year = {2017}
}

TY  - JOUR
ID  - 1408051
AU  - Yang, Xin - Neděla, Vilém - Runštuk, Jiří - Ondrušková, Gabriela - Krausko, Ján - Vetráková, Ľubica - Heger, Dominik
PY  - 2017
TI  - Evaporating brine from frost flowers with electron microscopy and implications for atmospheric chemistry and sea-salt aerosol formation
JF  - Atmospheric Chemistry and Physics
VL  - 17
IS  - 10
SP  - 6291-6303
EP  - 6291-6303
PB  - COPERNICUS GESELLSCHAFT MBH
SN  - 16807316
KW  - EXPERIMENTAL-COMPUTATIONAL APPROACH
KW  - AQUEOUS-SOLUTIONS
KW  - BOUNDARY-LAYER
KW  - BLOWING SNOW
KW  - SPECTROSCOPIC PROPERTIES
KW  - LOW-TEMPERATURES
KW  - OZONE DEPLETION
KW  - ICE NUCLEATION
KW  - HEXAGONAL ICE
KW  - IN-SITU
UR  - https://www.atmos-chem-phys.net/17/6291/2017/
L2  - https://www.atmos-chem-phys.net/17/6291/2017/
N2  - An environmental scanning electron microscope (ESEM) was used for the first time to obtain well-resolved images, in both temporal and spatial dimensions, of lab-prepared frost flowers (FFs) under evaporation within the chamber temperature range from -5 to -18 degrees C and pressures above 500 Pa. Our scanning shows temperature-dependent NaCl speciation: the brine covering the ice was observed at all conditions, whereas the NaCl crystals were formed at temperatures below -10 degrees C as the brine oversaturation was achieved. Finger-like ice structures covered by the brine, with a diameter of several micrometres and length of tens to 100 mu m, are exposed to the ambient air. The brine-covered fingers are highly flexible and cohesive. The exposure of the liquid brine on the micrometric fingers indicates a significant increase in the brine surface area compared to that of the flat ice surface at high temperatures; the NaCl crystals formed can become sites of heterogeneous reactivity at lower temperatures. There is no evidence that, without external forces, salty FFs could automatically fall apart to create a number of sub-particles at the scale of micrometres as the exposed brine fingers seem cohesive and hard to break in the middle. The fingers tend to combine together to form large spheres and then join back to the mother body, eventually forming a large chunk of salt after complete dehydration. The present microscopic observation rationalizes several previously unexplained observations, namely, that FFs are not a direct source of sea-salt aerosols and that saline ice crystals under evapora-tion could accelerate the heterogeneous reactions of bromine liberation.
ER  -

YANG, Xin, Vilém NEDĚLA, Jiří RUNŠTUK, Gabriela ONDRUŠKOVÁ, Ján KRAUSKO, Ľubica VETRÁKOVÁ a Dominik HEGER. Evaporating brine from frost flowers with electron microscopy and implications for atmospheric chemistry and sea-salt aerosol formation. \textit{Atmospheric Chemistry and Physics}. GOTTINGEN: COPERNICUS GESELLSCHAFT MBH, 2017, roč.~17, č.~10, s.~6291-6303. ISSN~1680-7316. Dostupné z: https://dx.doi.org/10.5194/acp-17-6291-2017.

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