Ice nucleating particles in the marine boundary layer in the Canadian Arctic during summer 2014

Irish, Victoria E.; Hanna, Sarah; Willis, Megan D.; China, Swarup; Thomas, Jennie L.; Wentzell, Jeremy J. B.; Ćirišan, Ana; Si, Meng; Leaitch, W. R.; Murphy, J. G.; Abbatt, Jonathan P. D.; Laskin, Alexander; Girard, E.; Bertram, Allan K.

doi:10.5194/acp-19-1027-2019

Cited by 59 publications

(86 citation statements)

References 81 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…3.1, N INP values from ULW at Cabo Verde are comparable to the Arctic, and the NaCl ratios were close to 10 −10 in both studies; therefore, N sea spray, air INP values (derived from ULW) are also comparable. A high enrichment of N INP in SML to ULW was observed in the Arctic (Irish et al, 2019b). Therefore, N sea spray, air INP (derived from SML) in the Arctic was also higher than in this study.…”

Section: Inps Originating From Sea Spraycontrasting

confidence: 54%

See 1 more Smart Citation

Characterization of aerosol particles at Cabo Verde close to sea level and at the cloud level – Part 2: Ice-nucleating particles in air, cloud and seawater

et al. 2020

View full text Add to dashboard Cite

Abstract. Ice-nucleating particles (INPs) in the troposphere can form ice in clouds via heterogeneous ice nucleation. Yet, atmospheric number concentrations of INPs (NINP) are not well characterized, and, although there is some understanding of their sources, it is still unclear to what extend different sources contribute or if all sources are known. In this work, we examined properties of INPs at Cabo Verde (a.k.a. Cape Verde) from different environmental compartments: the oceanic sea surface microlayer (SML), underlying water (ULW), cloud water and the atmosphere close to both sea level and cloud level. Both enrichment and depletion of NINP in SML compared to ULW were observed. The enrichment factor (EF) varied from roughly 0.4 to 11, and there was no clear trend in EF with ice-nucleation temperature. NINP values in PM10 sampled at Cape Verde Atmospheric Observatory (CVAO) at any particular ice-nucleation temperature spanned around 1 order of magnitude below −15 ∘C, and about 2 orders of magnitude at warmer temperatures (>-12 ∘C). Among the 17 PM10 samples at CVAO, three PM10 filters showed elevated NINP at warm temperatures, e.g., above 0.01 L−1 at −10 ∘C. After heating samples at 95 ∘C for 1 h, the elevated NINP at the warm temperatures disappeared, indicating that these highly ice active INPs were most likely biological particles. INP number concentrations in PM1 were generally lower than those in PM10 at CVAO. About 83±22 %, 67±18 % and 77±14 % (median±standard deviation) of INPs had a diameter >1 µm at ice-nucleation temperatures of −12, −15 and −18 ∘C, respectively. PM1 at CVAO did not show such elevated NINP at warm temperatures. Consequently, the difference in NINP between PM1 and PM10 at CVAO suggests that biological ice-active particles were present in the supermicron size range. NINP in PM10 at CVAO was found to be similar to that on Monte Verde (MV, at 744 m a.s.l.) during noncloud events. During cloud events, most INPs on MV were activated to cloud droplets. When highly ice active particles were present in PM10 filters at CVAO, they were not observed in PM10 filters on MV but in cloud water samples instead. This is direct evidence that these INPs, which are likely biological, are activated to cloud droplets during cloud events. For the observed air masses, atmospheric NINP values in air fit well to the concentrations observed in cloud water. When comparing concentrations of both sea salt and INPs in both seawater and PM10 filters, it can be concluded that sea spray aerosol (SSA) only contributed a minor fraction to the atmospheric NINP. This latter conclusion still holds when accounting for an enrichment of organic carbon in supermicron particles during sea spray generation as reported in literature.

show abstract

Section: Inps Originating From Sea Spraycontrasting

confidence: 54%

“…8. Irish et al (2019b) used the same method to get N sea spray, air INP in the Arctic (without considering enrichment of INPs in sea salt particles during sea spray generation), as shown by purple (derived from SML) and brown (derived from ULW) boxes in Fig. 8.…”

Section: Inps Originating From Sea Spraymentioning

confidence: 99%

Characterization of aerosol particles at Cabo Verde close to sea level and at the cloud level – Part 2: Ice-nucleating particles in air, cloud and seawater

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Three main types of natural aerosol impact the Arctic troposphere. First, mineral dust is particularly important owing to its ability to affect the surface energy balance by depositing on high albedo surfaces (e.g., Stone et al, ; Zwaaftink et al, ) and because of its prominent role in ice nucleation (section ; e.g., Irish et al, ; Si et al, ). Early airborne studies of aerosol composition attributed elevated layers of haze in Arctic regions to dust from Asian deserts (Rahn et al, ), but relatively little is known about the transport of mineral dust to Arctic regions.…”

Section: Long‐range Transportmentioning

confidence: 99%

“…However, these efforts have largely focused on ice nucleation activity of SML samples and have not made a direct connection with INP present in the Arctic atmosphere. Measurements of ice nucleation efficiency on a surface area basis in the Canadian Arctic Archipelago have suggested that marine‐derived particles may not be the dominant contributors to ambient INPs (Irish et al, ; Si et al, ). However, when mineral dust is not present marine‐derived INPs may become important (Creamean, Kirpes, et al, ).…”

Section: Aerosol‐cloud Interactionsmentioning

confidence: 99%

Processes Controlling the Composition and Abundance of Arctic Aerosol

Willis

Leaitch

Abbatt

2018

Reviews of Geophysics

Self Cite

137

159

View full text Add to dashboard Cite

The Arctic region is a harbinger of global change and is warming at a rate higher than the global average. While Arctic warming is driven by increases in anthropogenic greenhouse gases' in combination with local feedback mechanisms, short‐lived climate forcing agents, such as tropospheric aerosol, are also important drivers of Arctic climate. Arctic aerosol‐climate impacts vary seasonally as a result of the interplay between aerosol and different cloud types, available solar radiation, sea ice, surface albedo, Arctic and lower latitude removal processes, and atmospheric transport patterns. Photochemistry and efficient wet aerosol removal have low impact in winter but become important in spring to summer, dramatically altering aerosol chemical composition, and driving the size distribution from a pronounced accumulation mode toward a dominance of smaller particles. Retreating sea ice, increasing solar insolation and warmer temperatures in summer result in enhanced emissions from Arctic marine and terrestrial ecosystems, and anthropogenic sources, with impacts on the composition of gas and particle phases. Fractional cloud cover reaches a maximum in Arctic summer, in parallel with decreasing sea ice extent and surface albedo. This seasonal variation corresponds to significant changes in the net cloud radiative effect; changes that are affected by aerosol. This review summarizes our current knowledge of processes that control Arctic aerosol properties. We highlight both natural and anthropogenic processes that will be impacted by current and future sea ice loss. Efforts are needed to better constrain aerosol removal rates, characterize aerosol precursors, and constrain the seasonality and magnitude of aerosol‐cloud‐climate impacts.

show abstract

“…To confirm the presence of bioparticles around Sisal and to determine their potential role in the ice-nucleating abilities of the collected aerosol particles, bacteria and fungi identification was performed. As stated by Islebe et al (2015) both bacteria and fungi need to be properly documented in the peninsula and the GoM to fully understand their regional importance. Samples for viable bacteria and fungi were collected every day at 06:00, 08:00, 10:00, and 12:00 local time.…”

Section: Identification Of the Potential Inp Sourcesmentioning

confidence: 99%

Ice-nucleating particles in a coastal tropical site

et al. 2019

Self Cite

View full text Add to dashboard Cite

Abstract. Atmospheric aerosol particles that can nucleate ice are referred to as ice-nucleating particles (INPs). Recent studies have confirmed that aerosol particles emitted by the oceans can act as INPs. This very relevant information can be included in climate and weather models to predict the formation of ice in clouds, given that most of them do not consider oceans as a source of INPs. Very few studies that sample INPs have been carried out in tropical latitudes, and there is a need to evaluate their availability to understand the potential role that marine aerosol may play in the hydrological cycle of tropical regions. This study presents results from the first measurements obtained during a field campaign conducted in the tropical village of Sisal, located on the coast of the Gulf of Mexico of the Yucatan Peninsula in Mexico in January–February 2017, and one of the few data sets currently available at such latitudes (i.e., 21∘ N). Aerosol particles sampled in Sisal are shown to be very efficient INPs in the immersion freezing mode, with onset freezing temperatures in some cases as high as −3 ∘C, similarly to the onset temperature from Pseudomonas syringae. The results show that the INP concentration in Sisal was higher than at other locations sampled with the same type of INP counter. Air masses arriving in Sisal after the passage of cold fronts have surprisingly higher INP concentrations than the campaign average, despite their lower total aerosol concentration. The high concentrations of INPs at warmer ice nucleation temperatures (T>-15 ∘C) and the supermicron size of the INPs suggest that biological particles may have been a significant contributor to the INP population in Sisal during this study. However, our observations also suggest that at temperatures ranging between −20 and −30 ∘C mineral dust particles are the likely source of the measured INPs.

show abstract

Ice nucleating particles in the marine boundary layer in the Canadian Arctic during summer 2014

Cited by 59 publications

References 81 publications

Characterization of aerosol particles at Cabo Verde close to sea level and at the cloud level – Part 2: Ice-nucleating particles in air, cloud and seawater

Characterization of aerosol particles at Cabo Verde close to sea level and at the cloud level – Part 2: Ice-nucleating particles in air, cloud and seawater

Processes Controlling the Composition and Abundance of Arctic Aerosol

Ice-nucleating particles in a coastal tropical site

Contact Info

Product

Resources

About