Reconciling atmospheric water uptake by hydrate forming salts

Rosati, Bernadette; Paul, Andreas; Iversen, Emil Mark; Maßling, Andreas; Bilde, Merete

doi:10.1039/d0em00179a

Cited by 11 publications

(12 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Sea salt furthermore contains salts that are hydrated also after drying, e.g. 17 , 18 , providing a liquid layer for surface chemistry 52 . Exposure of dry NaCl to has also been reported to lead to perchlorate formation, which may have an effect on hygroscopicity 53 , 54 .…”

Section: Resultsmentioning

confidence: 99%

“…6 b) is also affected by the heating process, reaching values comparable to those at the beginning of the experiment in the case of NaCl and slightly higher values for sea salt. In the marine atmosphere, SSA may exist as aqueous phase solution droplets and to investigate its hygroscopicity, for example using an HTDMA, the particles have to be dried most certainly leading to formation of several hydrated salts 18 . The decreasing hygroscopic growth factors with time for the same dry particle size observed in our study are ascribed to ageing reactions in the aqueous droplets leading to formation of hydrate forming salts and as a result hydrates in the dried particles.…”

Section: Resultsmentioning

confidence: 99%

“… and are examples of hydrate forming salts present in sea salt aerosol. A recent study by Rosati et al 18 shows that aerosolized and particles exhibit a substantially reduced water uptake potential compared to predicted values assuming anhydrous salts. Experimental and predicted values could be reconciled when taking into account the hydration states of the dried particles.…”

Section: Introductionmentioning

confidence: 94%

See 2 more Smart Citations

The impact of atmospheric oxidation on hygroscopicity and cloud droplet activation of inorganic sea spray aerosol

Rosati

Christiansen

Dinesen

et al. 2021

Sci Rep

Self Cite

View full text Add to dashboard Cite

Sea spray aerosol (SSA) contributes significantly to natural aerosol particle concentrations globally, in marine areas even dominantly. The potential changes of the omnipresent inorganic fraction of SSA due to atmospheric ageing is largely unexplored. In the atmosphere, SSA may exist as aqueous phase solution droplets or as dried solid or amorphous particles. We demonstrate that ageing of liquid NaCl and artificial sea salt aerosol by exposure to ozone and UV light leads to a substantial decrease in hygroscopicity and cloud activation potential of the dried particles of the same size. The results point towards surface reactions on the liquid aerosols that are more crucial for small particles and the formation of salt structures with water bound within the dried aerosols, termed hydrates. Our findings suggest an increased formation of hydrate forming salts during ageing and the presence of hydrates in dried SSA. Field observations indicate a reduced hygroscopic growth factor of sub-micrometre SSA in the marine atmosphere compared to fresh laboratory generated NaCl or sea salt of the same dry size, which is typically attributed to organic matter or sulphates. Aged inorganic sea salt offers an additional explanation for such a measured reduced hygroscopic growth factor and cloud activation potential.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 94%

See 1 more Smart Citation

The impact of atmospheric oxidation on hygroscopicity and cloud droplet activation of inorganic sea spray aerosol

Rosati

Christiansen

Dinesen

et al. 2021

Sci Rep

Self Cite

View full text Add to dashboard Cite

show abstract

“…A recent study by Rosati et al. 15 shows that aerosolized MgCl 2 and CaCl 2 particles exhibit a substantially reduced water uptake potential compared to predicted values assuming anhydrous salts. Experimental and predicted values could be reconciled when taking into account the hydration states of the dried particles.…”

Section: Introductionmentioning

confidence: 94%

“…Sea salt furthermore contains salts that are hydrated also after drying, e.g. MgCl 2 •6H 2 0 14,15 , providing a liquid layer for surface chemistry 47 . Exposure of dry NaCl to O 3 has also been reported to lead to perchlorate formation, which may have an effect on hygroscopicity 48,49 .…”

Section: Hygroscopicity and Cloud Activation Potentialmentioning

confidence: 99%

Atmospheric Ageing of Inorganic Sea Spray Aerosol: Implications for Hygroscopicity and Cloud Activation Potential

Rosati

Christiansen

Dinesen

et al. 2020

Preprint

Self Cite

View full text Add to dashboard Cite

Sea spray aerosol (SSA) contributes significantly to natural aerosol particle concentrations globally, in marine areas even dominantly. The potential changes of the omnipresent inorganic fraction of SSA due to atmospheric ageing is largely unexplored. We demonstrate that ageing of liquid NaCl and artificial sea salt aerosol by exposure to ozone and UV light leads to a substantial decrease in hygroscopicity and cloud activation potential. The results point towards surface reactions that are more crucial for small particles and the formation of salt structures with water bound within the aerosols, termed hydrates. Our findings suggest an increased formation of hydrate forming salts during ageing and the presence of hydrates in dried SSA. Field observations indicate a reduced hygroscopic growth of sub-micrometre SSA in the marine atmosphere compared to pure NaCl which is typically attributed to organic matter or sulphates. Aged inorganic sea salt offers an additional explanation for reduced hygroscopicity and cloud activation potential.

show abstract

Hygroscopic growth and collision studies of atmospheric aerosols across scaled particle sizes

Lu,

Chen,

Wang

et al. 2024

Powder Technology

View full text Add to dashboard Cite

Reconciling atmospheric water uptake by hydrate forming salts

Abstract: Magnesium and calcium chloride salts contribute to the global atmospheric aerosol burden via emission of sea spray and mineral dust. Their influence on aerosol hygroscopicity and cloud forming potential is...

Cited by 11 publications

References 35 publications

The impact of atmospheric oxidation on hygroscopicity and cloud droplet activation of inorganic sea spray aerosol

The impact of atmospheric oxidation on hygroscopicity and cloud droplet activation of inorganic sea spray aerosol

Atmospheric Ageing of Inorganic Sea Spray Aerosol: Implications for Hygroscopicity and Cloud Activation Potential

Hygroscopic growth and collision studies of atmospheric aerosols across scaled particle sizes

Contact Info

Product

Resources

About