ITS2.6/AS4 .5 | Atmosphere – Cryosphere interaction with focus on transport, deposition and effects of dust, black carbon, and other aerosols
Atmosphere – Cryosphere interaction with focus on transport, deposition and effects of dust, black carbon, and other aerosols
Co-organized by CR7
Convener: Pavla Dagsson Waldhauserova | Co-conveners: Outi Meinander, Marie Dumont, Biagio Di Mauro
Posters on site
| Attendance Wed, 26 Apr, 16:15–18:00 (CEST)
Hall X5
Posters virtual
| Attendance Wed, 26 Apr, 16:15–18:00 (CEST)
vHall AS
Wed, 16:15
Wed, 16:15
Atmosphere and Cryosphere are closely linked and need to be investigated as an interdisciplinary subject. Most of the cryospheric areas have undergone severe changes in last decades while such areas have been more fragile and less adaptable to global climate changes. This AS-CR session invites model- and observational-based investigations on any aspects of linkages between atmospheric processes and snow and ice on local, regional and global scales. Emphasis is given on the Arctic and Antarctic regions, high latitudes and altitudes, mountains, sea ice and permafrost regions. In particular, we encourage studies that address aerosols (such as Black Carbon, Organic Carbon, dust, volcanic ash, microplastics, pollen, sea salt, diatoms, bioaerosols, bacteria, etc.) and changes in the cryosphere, e.g., effects on snow/ice melt and albedo. The session also focuses on dust transport, aeolian deposition, and volcanic dust, including health, environmental or climate impacts at high latitudes, high altitudes and cold Polar Regions. We include contributions on biological and ecological sciences including dust-organisms interactions, cryoconites, bio-albedo, eco-physiological, biogeochemical and genomic studies. Related topics are light absorbing impurities, cold deserts, dust storms, long-range transport, glaciers darkening, polar ecology, and more. The scientific understanding of the AS-CR interaction needs to be addressed better and linked to the global climate predictions scenarios.

Posters on site: Wed, 26 Apr, 16:15–18:00 | Hall X5

Chairpersons: Pavla Dagsson Waldhauserova, Outi Meinander, Marie Dumont
Pavla Dagsson Waldhauserova, Outi Meinander, Olafur Arnalds, and IceDust members

Two billion tons of dust are annually transported in our atmosphere all around the world. High latitudes include active desert regions with at least 5 % production of the global atmospheric dust. Active High Latitude Dust (HLD) sources cover > 1,600,000 km2 and are located in both the Northern (Iceland, Alaska, Canada, Greenland, Svalbard, North Eurasia, and Scandinavia) and Southern (Antarctica, Patagonia, New Zealand) Hemispheres. Recent studies have shown that HLD travels several thousands of km inside the Arctic and > 3,500 km towards Europe. In Polar Regions, HLD was recognized as an important climate driver in the IPCC Special Report on the Ocean and Cryosphere in a Changing Climate in 2019. In situ HLD measurements are sparse, but there is increasing number of research groups investigating HLD and its impacts on climate in terms of effects on cryosphere, cloud properties and marine environment.

Long-term dust in situ measurements conducted in Arctic deserts of Iceland and Antarctic deserts of Eastern Antarctic Peninsula in 2018-2023 revealed some of the most severe dust storms in terms of particulate matter (PM) concentrations. While one-minute PM10 concentrations is Iceland exceeded 50,000 ugm-3, ten-min PM10 means in James Ross Island, Antarctica exceeded 120 ugm-3. The largest HLD field campaign was organized in Iceland in 2021 where 11 international institutions with > 70 instruments and 12 m tower conducted dust measurements (Barcelona Supercomputing Centre, Darmstadt, Berlin and Karlsruhe Universities, NASA, Czech University of Life sciences, Agricultural University of Iceland etc.). Additionally, examples of aerosol measurements from Svalbard and Greenland will be shown. There are newly two online models (DREAM, SILAM) providing daily operational dust forecasts of HLD. DREAM is first operational dust forecast for Icelandic dust available at the World Meteorological Organization Sand/Dust Storm Warning Advisory and Assessment System (WMO SDS-WAS). SILAM from the Finnish Meteorological Institute provides HLD forecast for both circumpolar regions. 

Icelandic dust has impacts on atmosphere, cryosphere, marine and terrestrial environments. It decreases albedo of both glacial ice/snow similarly as Black Carbon,  as well as albedo of mixed phase clouds via reduction in supercooled water content. There is also an evidence that volcanic dust particles scavenge efficiently SO2 and NO2 to form sulphites/sulfates and nitrous acid. High concentrations of volcanic dust and Eyjafjallajokull ash were associated with up to 20% decline in ozone concentrations in 2010. In marine environment, Icelandic dust with high total Fe content (10-13 wt%) and the initial Fe solubility of 0.08-0.6%, can impact primary productivity and nitrogen fixation in the N Atlantic Ocean, leading to additional carbon uptake.

Sand and dust storms, including HLD, were identified as a hazard that affects 11 of the 17 Sustainable Development Goals. HLD research community is growing and Icelandic Aerosol and Dust Association (IceDust) has > 100 members from 55 institutions in 21 countries (, including references to this abstract). IceDust became new member aerosol association of the European Aerosol Assembly in 2022. 


How to cite: Dagsson Waldhauserova, P., Meinander, O., Arnalds, O., and members, I.: An overview of recent High Latitude Dust (HLD) and aerosol measurements in Iceland, Antarctica, Svalbard, and Greenland, including HLD impacts on climate, EGU General Assembly 2023, Vienna, Austria, 23–28 Apr 2023, EGU23-6458,, 2023.

Christian Juncher Jørgensen, Jens Søndergaard, and Anders Mosbech

Dispersion and deposition of mineral dust from natural or anthropogenic sources can have both positive and negative effects on the environment depending on the geochemical and mineralogical composition of the dust. In Greenland, proglacial river systems draining the Greenland Ice Sheet occupy extensive areas of dust prone deposits, which are commonly mobilized and transported by winds of both katabatic and cyclonic origin and subsequently deposited as high latitude dust. The geochemical fingerprint of natural dust emitted along the latitudinal transect reflects the mineralogical and elemental composition of the bedrock underlying the Ice Sheet in the different geological provinces of Greenland. As dust emissions respond to changes in climate-sensitive drivers such as soil moisture, winds speed and precipitation, marked variations in natural dust emissions are present along the climatic gradient in Greenland, ranging from high latitude arctic deserts in North Greenland to low latitude shrub tundra in the South.

With a changing climate, interest has increased to access and exploit the rich mineral resources located in the Arctic. In Greenland, development of large-scale mines range from rare earth element mines in the sub-arctic South to zinc-lead mines in the high-arctic North. While the mining sector provides society with essential raw materials for a wide range of industrial processes as well as forming the basis for the transition into a global green economy, it also has significant environmental pitfalls, which should be avoided or mitigated. Mobilization, transport, and deposition of mineral dust from mine sites is often significant in regions susceptible to wind erosion because of the dry climate and lack of vegetation. Once dispersed into the environment, this mineral dust may impair important ecosystem functions due to its potential content of heavy metals and other trace elements, as well as cause concerns for public health.

To support the sustainable development of environmentally safe mining in sensitive Arctic land areas and reduce airborne environmental pollution, an improved understanding of processes leading to the dispersion of mineral dust in a changing Arctic is needed. This involves improved methods for monitoring dust emissions and dust deposition in a cold environment as well as analytical tools and methods to source trace and differentiate between natural and mining related dust. Accurate identification of individual dust sources subsequently makes it possible to mitigate emissions and target the regulation of mining activities towards these sources.

In the following, we present a new high latitude dust sampling location in Kangerlussuaq, West Greenland, where dust is collected using a wide array of passive and active dust samplers, including a continuously operated high volume dust sampler, which will offer filter samples of large air volumes (13.000 m3) at a weekly sampling frequency over multiple years. In addition, we would like to present data from a study (1) in which we developed a fast and cost-effective surface screening methodology that is easily applicable for dust source characterization in remote Arctic areas such as Greenland, where dry conditions and high winds create a high natural dust generation potential.

(1) Søndergaard, J. & Jørgensen, C.J. (2021) DOI: 10.1007/s11270-021-05095-2

How to cite: Jørgensen, C. J., Søndergaard, J., and Mosbech, A.: Geochemical fingerprinting of high latitude dust – potential environmental impacts of natural and mining related dust in Greenland in a changing climate., EGU General Assembly 2023, Vienna, Austria, 23–28 Apr 2023, EGU23-2609,, 2023.

Yun Qian, Huilin Huang, Cenlin He, Ned Bair, and Karl Rittger

Snow is a valuable resource in California. Snow from the Sierra Nevada sustains a diverse ecosystem and provides 3/4 of California’s Agricultural water supply. Because of its importance in water supply and global climate, snow accumulation, melt, and sublimation were ranked as the most important objectives in the 2017 Decadal Survey. This study employs a fully coupled meteorology‐chemistry‐snow model to investigate the impacts of both global warming and light‐absorbing particles (LAPs) on snow in the Sierra Nevada. Using self-organizing map (SOM) analysis with dust deposition and flux data from model and observations, we identify four typical dust transport patterns across the Sierra Nevada, associated with the mesoscale winds, Sierra barrier jet, North Pacific High, and long-range cross-Pacific westerlies, respectively. The satellite retrievals and model results show that LAPs in snow reduce snow albedo by 0.013 (0–0.045) in the Sierra Nevada during the ablation season (April-July), producing a midday mean radiative forcing of 4.5 W m−2 which increases to 15–22 W m−2 in July. LAPs in snow accelerate snow aging processes and reduce snow cover fraction, which doubles the albedo change and radiative forcing caused by LAPs. The impurity-induced snow darkening effects decrease snow water equivalent and snow depth by 20 and 70 mm in June in the Sierra Nevada bighorn sheep habitat. The earlier snowmelt reduces root-zone soil water content by 20%, deteriorating the forage productivity and playing a negative role in the survival of bighorn sheep. We also conduct the simulations using our coupled regional model to compare the impact of global warming vs. LAPs on snow melting by adopting the pseudo-global warming (PGW) approach to generate projections of future meteorological forcing. These results will be used to examine snow effects on endangered Sierra Nevada bighorn sheep and how a future climate might modify habitat and behavior.

How to cite: Qian, Y., Huang, H., He, C., Bair, N., and Rittger, K.: The lifecycle of snow in the Sierra Nevada USA: from snowfall to snowmelt and effects on endangered bighorn sheep, EGU General Assembly 2023, Vienna, Austria, 23–28 Apr 2023, EGU23-3776,, 2023.

Atte Korhola and Meri Ruppel

The amplified climate effect of black carbon (BC) in the Arctic is widely acknowledged. Despite this, information on its deposition patterns and particularly sources are still scarce from the area. Arctic-wide atmospheric BC monitoring show decreasing BC concentrations since the 1990s. However, increasing amounts of BC deposition records from the area show more spatial variability in long-term trends, and some records suggest deviating trends between atmospheric BC concentrations and deposition. Particularly in the European Arctic (northern Fennoscandia and northwestern Russia) BC deposition trends seem to have increased in recent decades rather than decreased as suggested by models and observed for atmospheric concentrations. Such dissimilarities between atmospheric BC concentrations and deposition trends suggest different meteorological processes and sources driving these, which need to be further studied to understand the effects of different BC emissions on the Arctic climate. Although we have quantified different BC fractions from lake sediments and ice cores in the European Arctic indicating variable deposition trends during the last 300 years, the records suggest surprisingly similar sources of the deposited BC particles. Our future endeavors lie in further illuminating the sources of deposited BC in the Arctic and particularly studying the potential significance of Russian gas flaring and increasing peatland fires.

How to cite: Korhola, A. and Ruppel, M.: Past black carbon deposition and sources in the European Arctic depicted from lake sediments and ice cores, EGU General Assembly 2023, Vienna, Austria, 23–28 Apr 2023, EGU23-5032,, 2023.

Shunan Feng, Joseph Mitchell Cook, Alexandre Magno Anesio, Liane G. Benning, and Martyn Tranter

The Greenland Ice Sheet (GrIS) is the largest single cyospheric contributor to global sea level rise. The surface ice albedo modulates the absorption of solar radiation and the current darkening of the GrIS enhances the surface meltwater production. However, the dark ice is unevenly distributed on the GrIS. Remote sensing observations found that dark ice is limited to the margin in the southeast region, while the spatial extent of dark ice stretches further inland in the southwest GrIS. This band of dark ice, with an albedo that is significantly lower than the surrounding ice in the melt season, is known as the Dark Zone. One hypothesis is that the spatial distribution of dark ice is influenced by topography, and surface slope in particular. This study attempts to verify this hypothesis and presents the first medium resolution (30 m) analysis of the topographic controls on the distribution of dark ice on the surface of the GrIS. The association between albedo and topographic factors, such as elevation, slope and aspect, and the distance from the ice margin, and the duration of bare ice exposure, are investigated using the ArcticDEM and a satellite albedo product derived from a harmonized Landsat and Sentinel 2 dataset. The results may allow certain controls on glacier ice algal growth, a key contributor to the progressive darkening of the ice surface, to be surmised.

How to cite: Feng, S., Cook, J. M., Anesio, A. M., Benning, L. G., and Tranter, M.: Topographic controls on the distribution of dark ice on the surface of the Greenland Ice Sheet, EGU General Assembly 2023, Vienna, Austria, 23–28 Apr 2023, EGU23-6600,, 2023.

Anika Rohde, Heike Vogel, Gholam Ali Hoshyaripour, Christoph Kottmeier, and Bernhard Vogel

Aerosols such as mineral dust particles reduce the surface albedo when deposited on snow. This leads to increased absorption of solar radiation. Especially in spring, this phenomenon can lead to increased snowmelt, which triggers further feedbacks at the land surface and in the atmosphere. Quantifying the magnitude of dust-induced variations is difficult because of the high variability in the spatial distribution of mineral dust and snow. We present an extension of a fully coupled atmospheric and land surface model system to investigate the effects of mineral dust on snow albedo across Eurasia. In a comprehensive ensemble simulation study, we investigated the short-term effects of an extreme Saharan dust deposition event in 2018. We found region-dependent feedbacks. Mountainous regions and areas near the snowline showed a strong impact from mineral dust deposition. The former showed a particularly strong decrease in snow depth. For instance, in the Caucasus Mountains we found a mean significant decrease in snow depth of -1.4 cm after one week. The latter showed a stronger feedback effect on surface temperature. In the flat region around the snow line, we found a mean significant surface warming of 0.9 K after one week. This study shows that the effects of mineral dust deposition depend on several factors. Primarily, these are elevation, slope, snow depth, and fraction of snow cover. Therefore, especially in complex terrain, it is necessary to use fully coupled models to study the effects of mineral dust on the snowpack and the atmosphere.

How to cite: Rohde, A., Vogel, H., Hoshyaripour, G. A., Kottmeier, C., and Vogel, B.: Regional Impact of Snow-Darkening During a Severe Saharan Dust Deposition Event in 2018 Across Eurasia, EGU General Assembly 2023, Vienna, Austria, 23–28 Apr 2023, EGU23-7762,, 2023.

György Varga, Ágnes Rostási, Adrienn Csávics, Pavla Dagsson-Waldhauserova, Outi Meinander, and Fruzsina Gresina

Over the past decades, an increasing number of Saharan dust storm events have been identified across Europe, using satellite measurements and imagery, numerical simulation data, meteorological analyses, air mass dispersion trajectories and surface observations, thus excluding subjective forcing factors. Both the frequency and intensity of dust storm events have been increasing over the last decade.
Saharan dust reached the Carpathian Basin at least 250 times between 1979 and 2022. The episodes of intense dust deposition in Hungary clearly showed the effect of the downwelling of high-latitude jet streams, leading to (1) extreme weather events and intense dust storms in the Atlas region and (2) increased atmospheric meridionality, which transported the large amounts of dust northwards.
To identify such events, we started our research in the North Atlantic region, where we identified 15 Saharan dust storm events in Iceland between 2008 and 2020, two of which were also surface sampled. The scope of these studies has now been extended to 1980 to 2022 to identify further events. Laboratory analyses of the sampled dust material have found abundant quartz particles larger than 100 µm, indicating that large dust particles can sometimes travel thousands of kilometres.
Similar studies have been initiated in the region of Finland, where 59 Saharan dust storm events were identified between 1980 and 2022. Note that we also found 22 dust storm events from the Aral-Caspian region and 5 episodes with Middle Eastern sources.
The research was supported by the NRDI projects FK138692 and RRF-2.3.1-21-2021.

How to cite: Varga, G., Rostási, Á., Csávics, A., Dagsson-Waldhauserova, P., Meinander, O., and Gresina, F.: Meridional Saharan dust transport towards higher latitudes, EGU General Assembly 2023, Vienna, Austria, 23–28 Apr 2023, EGU23-8920,, 2023.

Christopher Donahue, Brian Menounos, Nick Viner, Steven Beffort, Santiago Gonzalez Arriola, Rob White, and Derek Heathfield

Seasonal to long-term changes in albedo, or glacier darkening, is a critical parameter for energy and mass balance models. Yet many of these models employ simple parameterization schemes that darken snow and ice surfaces non-linearly through time. This simplification is not representative of the complex controls on albedo that vary spatially and temporally, driven by atmospheric processes, surface-atmosphere interaction, topography, and timing of glacier ice exposure. Albedo also spectrally varies, controlled by concentrations of light absorbing constituents (LACs) in the visible wavelengths and grain size in the near infrared wavelengths. Radiative forcing by LACs can enhance grain growth, leading to more rapid glacier darkening over the full solar spectrum. This process can accelerate as snow and ice melts because LACs tend to accumulate at the surface which can lead to increased radiative forcing over time for some glaciers. As temperatures warm, and aerosols increase due to land use change, drought, fire, and urbanization, it is likely that glacier darkening will intensify. To better quantify seasonal rates of darkening, and understand controls on intra- and interannual variability, we collected and analyzed a rich dataset obtained from imaging spectroscopy and lidar collected over Place Glacier in the Coast Mountains of British Columbia, Canada. Over the years 2021-2022, we acquired monthly data during the period of snow and glacier melt (March to October for 2021 and July to October 2022) using an aircraft with dedicated lidar (Riegl-780) and hyperspectral (Specim-Fenix; 451 bands) sensors. We processed these monthly acquisitions into 1-m, analysis-ready products. We describe our workflow for these products including development of snow and ice surface property retrievals in complex mountainous terrain. Our workflow yields retrievals that include broadband albedo, radiative forcing by LACs, and grain size. Radiative forcing from LACs can originate from abiotic and biotic sources, and we use the Modern-Era Retrospective Analysis for Research and Applications, Version 2 (MERRA-2) to interpret our retrievals with respect to contributions from dust and black carbon. We also highlight how these data can be used to understand seasonal glacier darkening events that occurred during a heat dome, snow algae blooms, and a late start to accumulation season. All these events are expected to increase in frequency or intensity due to climate change and hence, a better understanding of these physical processes will lead to improved physical models for future glacier evolution.

How to cite: Donahue, C., Menounos, B., Viner, N., Beffort, S., Gonzalez Arriola, S., White, R., and Heathfield, D.: Glacier darkening quantified from airborne imaging spectroscopy, Place Glacier, British Columbia, Canada, EGU General Assembly 2023, Vienna, Austria, 23–28 Apr 2023, EGU23-9330,, 2023.

Claudia Ravasio, Roberto Garzonio, Biagio Di Mauro, and Roberto Colombo

The spectral reflectance of snow and ice varies widely depending on several quantities related (1) to the local environmental variables, such as the solar zenith angle and the surface slope, (2) to the physical properties of the snow, such as the grain size and the snow liquid content, and (3) to the presence of light-absorbing particles (LAPs).  Different absorption features are displayed in snow spectra. In particular, the absorption at 1030 nm has been exploited for estimating the grain effective radius of snow both from remote and proximal sensing data (Dozier et al., 2009, Garzonio et al., 2018). This absorption feature has been also used for the retrieval of the liquid water content (LWC) of surface snow since it is characterized by a shift toward shorter wavelengths when LWC increases (Green et al., 2006). Taking benefit of this spectral shift of the absorption feature, we applied a continuum removal approach to obtain both the grain equivalent radius and the LWC value. Furthermore, the accumulation of LAPs, such as dust, black carbon, volcanic ash, and pigmented snow algae on the snowpack albedo increases the absorption of solar radiation and induces a positive surface radiative forcing, enhancing the surface melting.

In this contribution, we show a retrieval algorithm to estimate the variables of snow (i.e., snow grain size, snow water equivalent, LAPs concentration) by using the openly available radiative transfer model BioSnicar (Bio-optical Snow, Ice, and Aerosol Radiative model) to simulate the spectral albedo of snow and the absorption of solar light in the snowpack. We present data from two experimental sites located in the Eastern Alps (Stelvio Pass and Brenta Dolomites) collected using a Spectral Evolution spectroradiometer. Measured variables of snow with a Snow Sensor device were compared with those estimated from BioSnicar simulations. Moreover, the impurities content in snow samples collected will be analyzed in a laboratory to better constrain modeling results. Remote sensing is a fundamental tool for characterizing snow cover properties, from the accumulation of LAPs to the wet/dry state of the snow, and the use of satellite sensors (e.g. PRISMA) opens the possibility for monitoring their spatial and temporal variability. This may have an important impact on snow hydrology studies, mainly for monitoring snow melting and improving the management of freshwater resources in the Alpine environment.

How to cite: Ravasio, C., Garzonio, R., Di Mauro, B., and Colombo, R.: Multi-scale remote sensing and modeling for estimating liquid water content and LAPs on snow in the European Alps, EGU General Assembly 2023, Vienna, Austria, 23–28 Apr 2023, EGU23-16143,, 2023.

Blanca Astray, Vladislav Chrastný, and Adela Šípková

The crucial historical milestone, phasing out leaded gasoline, has rapidly affected atmospheric Pb's concentration and isotope composition. Distant Arctic localities, often without significant industrial contamination sources, can be influenced by foreign transport. For instance, Greenland is affected by Eurasian and Canadian sources in spring and summer, and North American sources in autumn and winter.

Using snow samples, we chose three Arctic/Subarctic localities of Svalbard, Greenland, and Iceland to study the Pb stable isotope signals from the atmosphere. To learn more about possible sources of Pb pollution, we also processed local rock and fuel samples.

We filtrated the melted snow to analyze the solid snow particles and the dissolved Pb pool in the snow. The Pb isotope composition in the solid particles was more related to the rock samples in Iceland and Greenland. Signals from rock samples in Greenland are less radiogenic than those we found in Icelandic rocks. In Svalbard, the solid particles are enriched with coal content which is still mined at this locality. In filtrates, the signals from fuel (gasoline/diesel) Pb are present, which indicates that the local sources of car and snowmobile traffic are a significant source of Pb in this area. In Greenland, we also found extremely radiogenic signals in filtrate snow samples. The origin of this source would be more likely related to distant sources by transboundary pollution transfer.  

From our data, we conclude that several local and distant sources of Pb exist in pristine Arctic and Subarctic localities. Fuel seems to be the predominant source in Nuuk, while other sources, such as coal, are significant in Iceland and Svalbard, even in areas of higher local traffic.

How to cite: Astray, B., Chrastný, V., and Šípková, A.: Stable Pb isotope signals in the Arctic: does the general background exist?, EGU General Assembly 2023, Vienna, Austria, 23–28 Apr 2023, EGU23-17351,, 2023.

Seyedali Sayedain, Norman T. O’Neill, James King, Patrick L. Hayes, Daniel Bellamy, Richard Washington, Sebastian Engelstaedter, Andy Vicente-Luis, Jill Bachelder, and Malo Bernhard

The sub-Arctic Lhù’ààn Mân’ (Kluane Lake) region in the Canadian Yukon is subject to regular drainage wind-induced dust plumes emanating from the Slims River basin. This dust emissions site is just one of many current and potential future proglacial dust sources in the Canadian North. We employed ground-based passive and active remote sensing (RS) techniques to analyze the complementarity and redundancy of such RS retrievals relative to springtime (May 2019) Kluane Lake microphysical measurements. This included correlation analyses between ground-based coarse mode (CM) aerosol optical depth (AOD) retrievals from AERONET AOD spectra, CM AODs derived from co-located Doppler lidar profiles and OPS (Optical Particle Sizer) surface measurements of CM particle-volume concentration ( ). An automated dust classification scheme tied to intercorrelations between lidar-derived CM AOD, AERONET-derived CM AODs and  variations was developed to objectively identify local dust events. Lidar ratios derived from a priori refractive indices and OPS-derived effective radius statistics were also validated using AERONET-derived CM AODs. Bi-modal CM PSDs from AERONET inversions showed CM peaks at ~ 1.3 µm and 5 – 6.6 µm radius: we argued that this was associated with springtime Asian dust and Lhù’ààn Mân’ dust, respectively. Correlations between the CIMEL-derived fine-mode (FM) AOD and FM OPS-derived particle-volume concentration suggest that remote sensing techniques can be employed to monitor FM dust (which is arguably a better indicator of the long-distance transport of HLD).

How to cite: Sayedain, S., O’Neill, N. T., King, J., Hayes, P. L., Bellamy, D., Washington, R., Engelstaedter, S., Vicente-Luis, A., Bachelder, J., and Bernhard, M.: Local dust plume analysis and classification using ground-based remote sensing and microphysical measurement acquired at Lhù’ààn Mân’ (Kluane Lake), Yukon, EGU General Assembly 2023, Vienna, Austria, 23–28 Apr 2023, EGU23-17546,, 2023.

Posters virtual: Wed, 26 Apr, 16:15–18:00 | vHall AS

Chairperson: Pavla Dagsson Waldhauserova
Rita Traversi, Silvia Becagli, Laura Caiazzo, Paolo Cristofanelli, Raffaello Nardin, Davide Putero, and Mirko Severi

The study of aerosol chemical composition in the Antarctic plateau can provide basic information on the main natural (and also anthropogenic) inputs, atmospheric reactivity, and long-range transport processes of the aerosol components. Moreover, chemical and physical processes occurring at the atmosphere-snow interface are yet not fully understood and work is needed to assess the impact of atmospheric chemistry on snow composition and to better interpret ice core records retrieved at those sites.

At this purpose, simultaneous aerosol and surface snow samplings were set up and run at Dome C station (75° 06’ S; 123° 20’ E, 3233 m a.s.l) all year-round since 2004/05 and are still ongoing through various PNRA Projects, particularly LTCPAA (2016-2020) and STEAR (2020-2023).

Aerosol and snow samples were analysed for main and trace ion markers, aiming to better constrain extent and timing of the main natural sources (sea salt, marine biogenic, mineral dust) and to detect the possible contribution of anthropic inputs (biomass burning, wildfires, local contamination). In addition, such a study might help in improving our knowledge of transport processes (free troposphere, stratosphere-troposphere exchange) and atmospheric reaction processes (such as neutralization, chemical fractionation).

A comparison with ozone measurements, carried out continuously over the same period, is also attempted, to better address the atmospheric processes involving the atmosphere-snow exchanges of N-cycle species and atmosphere oxidative properties.

How to cite: Traversi, R., Becagli, S., Caiazzo, L., Cristofanelli, P., Nardin, R., Putero, D., and Severi, M.: 15-yr long records of aerosol and surface snow chemical composition at Dome C (High Antarctic Plateau), EGU General Assembly 2023, Vienna, Austria, 23–28 Apr 2023, EGU23-5749,, 2023.