High‐latitude dust deposition in snow on the glaciers of James Ross Island, Antarctica

Kavan, Jan; Nývlt, Daniel; Láska, Kamil; Engel, Zbyněk; Kňažková, Michaela

doi:10.1002/esp.4831

Cited by 28 publications

(18 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Long-range transport of dust originating in Patagonia was observed during aerosol measurements (Kavan et al, 2018). Higher proportion of long range transported dust was found in snow pits on higher elevated glaciers compared to higher proportion of locally transported dust in lower elevated glaciers (Kavan et al, 2020b). Kňažková et al (2020) identified redistribution of mineral material within the HLD source area in Abernethy Flats impacting the local microtopography.…”

Section: James Ross Island Ulu Peninsulamentioning

confidence: 94%

Newly identified climatically and environmentally significant high latitude dust sources

Meinander

Dagsson-Waldhauserová

Amosov

et al. 2021

Preprint

Self Cite

View full text Add to dashboard Cite

Abstract. Dust particles emitted from high latitudes (≥ 50° N and ≥ 40° S, including Arctic as a subregion ≥ 60° N), have a potentially large local, regional, and global significance to climate and environment as short-lived climate forcers, air pollutants and nutrient sources. To understand the multiple impacts of the High Latitude Dust (HLD) on the Earth systems, it is foremost to identify the geographic locations and characteristics of local dust sources. Here, we identify, describe, and quantify the Source Intensity (SI) values using the Global Sand and Dust Storms Source Base Map (G-SDS-SBM), for sixty-four HLD sources included in our collection in the Northern (Alaska, Canada, Denmark, Greenland, Iceland, Svalbard, Sweden, and Russia) and Southern (Antarctica and Patagonia) high latitudes. Activity from most of these HLD dust sources show seasonal character. The environmental and climatic effects of dust on clouds and climatic feedbacks, atmospheric chemistry, marine environment, and cryosphere-atmosphere feedbacks at high latitudes are discussed, and regional-scale modelling of dust atmospheric transport from potential Arctic dust sources is demonstrated. It is estimated that high latitude land area with higher (SI ≥ 0.5), very high (SI ≥ 0.7) and the highest potential (SI ≥ 0.9) for dust emission cover >1 670 000 km2, >560 000 km2, and >240 000 km2, respectively. In the Arctic HLD region, land area with SI ≥ 0.5 is 5.5 % (1 035 059 km2), area with SI ≥ 0.7 is 2.3 % (440 804 km2), and with SI ≥ 0.9 it is 1.1 % (208 701 km2). Minimum SI values in the north HLD region are about three orders of magnitude smaller, indicating that the dust sources of this region are highly dependable on weather conditions. In the south HLD region, soil surface conditions are favourable for dust emission during the whole year. Climate change can cause decrease of snow cover duration, retrieval of glaciers, permafrost thaw, and increase of drought and heat waves intensity and frequency, which all lead to the increasing frequency of topsoil conditions favourable for dust emission and thereby increasing probability for dust storms. Our study provides a step forward to improve the representation of HLD in models and to monitor, quantify and assess the environmental and climate significance of HLD in the future.

show abstract

Section: James Ross Island Ulu Peninsulamentioning

confidence: 94%

Newly identified climatically and environmentally significant high latitude dust sources

Meinander

Dagsson-Waldhauserová

Amosov

et al. 2021

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

“…Perennial snow banks are commonly formed in the lee of slopes where strong prevailing winds deposit aeolian transported snow. Melt from these snow banks often feed ephemeral streams and ephemeral to perennial lakes or ponds (Davies et al, 2013;Kavan et al, 2017Kavan et al, , 2020.…”

Section: Glacier Ice and Snowmentioning

confidence: 99%

“…Previously mapped geological structures (Mlčoch et al, 2020) were used to determine the limits of the present erosional surfaces of the Cretaceous to Neogene basement rocks. The poorly consolidated Cretaceous strata are easily weathered and reworked by ice masses on Ulu Peninsula, as well as by ephemeral streams or wind activity (Carrivick et al, 2012;Kavan et al, 2017Kavan et al, , 2020.…”

Section: Geological Map Componentsmentioning

confidence: 99%

Geomorphology of Ulu Peninsula, James Ross Island, Antarctica

et al. 2021

Self Cite

View full text Add to dashboard Cite

This study presents a 1:25,000 geomorphological map of the northern sector of Ulu Peninsula, James Ross Island, Antarctic Peninsula. The map covers an area of c. 250 km 2 , and documents the landforms and surficial sediments of one of the largest ice-free areas in Antarctica, based on remote sensing and field-based mapping. The large-scale landscape features are determined by the underlying Cretaceous sedimentary and Neogene volcanic geology, which has been sculpted by overlying ice masses during glacial periods. Paraglacial and periglacial features are superimposed upon remnant glacial features, reflecting the post-glacial evolution of the landscape. The study area can be broadly separated into three geomorphological sectors, according to the dominant contemporary Earth-surface processes; specifically, a glacierised southern sector, a paraglacial-dominated eastern sector, and a periglacial-dominated central/northern sector. This map provides a basis for further interdisciplinary research, and insight into the potential future landscape evolution of other parts of the Antarctic Peninsula as the climate warms.

show abstract

“…The whole James Ross Archipelago lies in the precipitation shadow of the Antarctic Peninsula, with annual precipitation estimates of 300–500 mm of the water-equivalent (van Lipzig et al 2004). Importantly, high-speed winds have been observed to redistribute snow accumulations from flat surfaces and depressions (Kavan et al 2020).…”

Section: Study Areamentioning

confidence: 99%

Status and short-term environmental changes of lakes in the area of Devil's Bay, Vega Island, Antarctic Peninsula

et al. 2020

Self Cite

View full text Add to dashboard Cite

Climate change affects various components of the polar environment, including lacustrine systems in many regions of the Antarctic Peninsula. However, the recent status of these life-preserving habitats remains poorly known. We performed field geomorphological mapping and limnological characterization of lakes distributed across Devil's Bay in the northern area of Vega Island, James Ross Archipelago, and described some significant changes in their physical and chemical properties during the 2013 summer season. Fifty lakes were described in the area, even though the area is relatively small (~12 km2). Six major lake types were distinguished based on their geomorphological settings and their origins, and their hydrochemical properties were compared with the neighbouring lake districts. The geomorphic characteristics of the lakes range from stable lakes on till plains (21 out of 50 lakes), to kettle lakes on fresh moraines with an unstable shoreline, to very dynamic ice-contact lakes with fluctuating water levels and inundated areas. The ice-contact lake dynamics were observed using ‘Lake Payer’ as an example. At the interface between hydrology and geosciences, this study provides new and original data from a yet largely unexplored region and emphasizes the importance of cross-disciplinary research in polar sciences.

show abstract

High‐latitude dust deposition in snow on the glaciers of James Ross Island, Antarctica

Cited by 28 publications

References 58 publications

Newly identified climatically and environmentally significant high latitude dust sources

Newly identified climatically and environmentally significant high latitude dust sources

Geomorphology of Ulu Peninsula, James Ross Island, Antarctica

Status and short-term environmental changes of lakes in the area of Devil's Bay, Vega Island, Antarctic Peninsula

Contact Info

Product

Resources

About