Some Features of the Growth, Structure and Metamorphism of East Antarctic Landfast Sea Ice

Fedotov, V. I.; Cherepanov, N. V.; Tyshko, K. P.

doi:10.1029/ar074p0343

Cited by 29 publications

(30 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Pack ice covers most of the SIZ in both polar oceans (Zwally et al 1983). Fast ice is attached to the continent, often extending tens of kilometers from the land (Fedotov et al 1998).…”

Section: Antarc Tic and Southernmentioning

confidence: 99%

The Nexus between Sea Ice and Polar Emissions of Marine Biogenic Aerosols

Gabric

Matrai

Jones

et al. 2018

Bulletin of the American Meteorological Society

View full text Add to dashboard Cite

Accurate estimation of the climate sensitivity requires a better understanding of the nexus between polar marine ecosystem responses to warming, changes in sea ice extent, and emissions of marine biogenic aerosol (MBA). Sea ice brine channels contain very high concentrations of MBA precursors that, once ventilated, have the potential to alter cloud microphysical properties, such as cloud droplet number, and the regional radiative energy balance. In contrast to temperate latitudes, where the pelagic phytoplankton are major sources of MBAs, the seasonal sea ice dynamic plays a key role in determining MBA concentration in both the Arctic and Antarctic. We review the current knowledge of MBA sources and the link between ice melt and emissions of aerosol precursors in the polar oceans. We illustrate the processes by examining decadal-scale time series in various satellite-derived parameters such as aerosol optical depth (AOD), sea ice extent, and phytoplankton biomass in the sea ice zones of both hemispheres. The sharpest gradients in aerosol indicators occur during the spring period of ice melt. In sea ice–covered waters, the peak in AOD occurs well before the annual maximum in biomass in both hemispheres. The results provide strong evidence that suggests seasonal changes in sea ice and ocean biology are key drivers of the polar aerosol cycle. The positive trend in annual-mean Antarctic sea ice extent is now almost one-third of the magnitude of the annual-mean decrease in Arctic sea ice, suggesting the potential for different patterns of aerosol emissions in the future.

show abstract

“…Pack ice covers most of the SIZ in both polar oceans (Zwally et al 1983). Fast ice is attached to the continent, often extending tens of kilometers from the land (Fedotov et al 1998).…”

Section: Antarc Tic and Southernmentioning

confidence: 99%

The Nexus between Sea Ice and Polar Emissions of Marine Biogenic Aerosols

Gabric

Matrai

Jones

et al. 2018

Bulletin of the American Meteorological Society

View full text Add to dashboard Cite

show abstract

“…Landfast sea ice (fast ice) is immobile sea ice, anchored either to coasts or continental ice formations (ice shelves, glacier tongues, and grounded icebergs) or grounded over shoals (Fedotov et al, 1998;Fraser et al, 2012;Massom et al, 2001;World Meteorological Organization, 1970). Fast ice forms a narrow belt, rarely exceeding 150 km, at least off the East Antarctic coast, the only area for which detailed ice charts (Fedotov et al, 1998) and sea ice remote sensing analyses are available (Fraser et al, 2012;Giles et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Chlorophyll‐a in Antarctic Landfast Sea Ice: A First Synthesis of Historical Ice Core Data

et al. 2018

View full text Add to dashboard Cite

Historical sea ice core chlorophyll‐a (Chla) data are used to describe the seasonal, regional, and vertical distribution of ice algal biomass in Antarctic landfast sea ice. The analyses are based on the Antarctic Fast Ice Algae Chlorophyll‐a data set, a compilation of currently available sea ice Chla data from landfast sea ice cores collected at circum‐Antarctic nearshore locations between 1970 and 2015. Ice cores were typically sampled from thermodynamically grown first‐year ice and have thin snow depths (mean = 0.052 ± 0.097 m). The data set comprises 888 ice cores, including 404 full vertical profile cores. Integrated ice algal Chla biomass (range: <0.1–219.9 mg/m2, median = 4.4 mg/m2, interquartile range = 9.9 mg/m2) peaks in late spring and shows elevated levels in autumn. The seasonal Chla development is consistent with the current understanding of physical drivers of ice algal biomass, including the seasonal cycle of irradiance and surface temperatures driving landfast sea ice growth and melt. Landfast ice regions with reported platelet ice formation show maximum ice algal biomass. Ice algal communities in the lowermost third of the ice cores dominate integrated Chla concentrations during most of the year, but internal and surface communities are important, particularly in winter. Through comparison of biomass estimates based on different sea ice sampling strategies, that is, analysis of full cores versus bottom‐ice section sampling, we identify biases in common sampling approaches and provide recommendations for future survey programs: for example, the need to sample fast ice over its entire thickness and to measure auxiliary physicochemical parameters.

show abstract

“…The solute release into liquid water during freezing in an artificial environment has been extensively studied in various fields, such as technology, chemical analysis, food, medicine [4][5][6][7], and pollutant removal. In particular, freezing enrichment technology is used in industry to purify solutions [8].…”

Section: Introductionmentioning

confidence: 99%

First-Principles Study on the Migration of Heavy Metal Ions in Ice-Water Medium from Ulansuhai Lake

Sun

et al. 2018

Water

View full text Add to dashboard Cite

Energy is a fundamental driver that causes material movement. It is important to discover changes in energy by studying the internal mechanism of pollutant migration between system components during the freezing process. To explore the migration mechanism of heavy metal ions (HMIs) from ice to water in a lake, we carried out a laboratory freezing experiment and simulated the distribution and migration of HMIs (Fe, Cu, Mn, Zn, Pb, Cd, and Hg) under different conditions. Then, we analyzed the use of energy by first-principle calculations. The results showed that HMIs are more stable in an aqueous environment than in an ice environment. For the same HMI, the binding energy in water is smaller than that in ice. Hence, the HMIs migrated from ice to water as the lake was freezing. The ability of different kinds of heavy metals to migrate from ice to water is related to their binding energy in ice. The concentrations of HMIs in ice are positively correlated with their binding energies. This study investigated the migration characteristics and mechanisms of HMIs in the process of lake freezing.

show abstract

Some Features of the Growth, Structure and Metamorphism of East Antarctic Landfast Sea Ice

Cited by 29 publications

References 6 publications

The Nexus between Sea Ice and Polar Emissions of Marine Biogenic Aerosols

The Nexus between Sea Ice and Polar Emissions of Marine Biogenic Aerosols

Chlorophyll‐a in Antarctic Landfast Sea Ice: A First Synthesis of Historical Ice Core Data

First-Principles Study on the Migration of Heavy Metal Ions in Ice-Water Medium from Ulansuhai Lake

Contact Info

Product

Resources

About