Glaciers Fluctuation over the Last Half  Century in the Headwaters of the Enguri River, Caucasus Mountains, Georgia

Tielidze, Levan; Lominadze, George; Lomidze, Nino

doi:10.4236/ijg.2015.64031

Cited by 6 publications

(3 citation statements)

References 30 publications

(25 reference statements)

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“…The area of Adishi glacier was 10.5 km 2 and tongue was terminated on 2330 m. asl, in 1960. Adishi Glacier covers the area of 9.5 km 2 and the terminus at 2,485 m asl 62 , 63 . The Glacier is divided into three parts: with the firn valley above 3800 meters, which is surrounded by the high peaks, grandiose icefall (~1000–1300 meters in height) and the classic ice tongue with a terminus at 2,485 m asl.…”

Section: Methodsmentioning

confidence: 99%

The sources of high airborne radioactivity in cryoconite holes from the Caucasus (Georgia)

Łokas

Zawierucha

Cwanek

et al. 2018

Sci Rep

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Cryoconite granules are mixtures of mineral particles, organic substances and organisms on the surface of glaciers where they decrease the ice albedo and are responsible for formation of water-filled holes. The contaminants are effectively trapped in the cryoconite granules and stay there for many years. This study evaluates the contamination level of artificial and natural radionuclides in cryoconite holes from Adishi glacier (Georgia) and identifies the sources of contamination based on activity or mass ratios among artificial radionuclides. Results revealed high activity concentrations of fallout radionuclides reaching 4900 Bq/kg, 2.5 Bq/kg, 107 Bq/kg and 68 Bq/kg for 137Cs, 238Pu, 239+240Pu and 241Am, respectively. The main source of Pu is global fallout, but the low 240Pu/239Pu atomic ratios also indicated local tropospheric source of 239Pu, probably from the Kapustin Yar nuclear test site. Also, high activity ratios of 241Am/239+240Pu could originate from Kapustin Yar. The natural radionuclides originate from the surrounding rocks and were measured to control the environmental processes. 210Pb in cryoconite granules comes predominantly from the atmospheric deposition, and its activity concentrations reach high values up to 12000 Bq/kg.

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Section: Methodsmentioning

confidence: 99%

The sources of high airborne radioactivity in cryoconite holes from the Caucasus (Georgia)

Łokas

Zawierucha

Cwanek

et al. 2018

Sci Rep

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“…To investigate the dynamics of glaciers it is important to analyze the climatological information, mainly the air temperature and precipitation data for the same period. Nowadays the Mestia meteorological station is the only current station and is located at 1440 m above sea level [14].…”

Section: Discussionmentioning

confidence: 99%

Glaciers Reduction and Climate Change Impact over the Last One Century in the Mulkhura River Basin, Caucasus Mountains, Georgia

Tielidze

Kumladze²,

Asanidze³

2015

IJG

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The reduction of glaciers of Mulkhura River basin over the last century is revised in the paper. Mulkhura River basin is located on the southern slope of the central Caucasus from the Mount Bashili (4148 m) to the Mount Gistola (4860 m) and it is the main center of the contemporary glaciations in the Enguri River basin. The percentage reduction of areas of compound valley glaciers with the relation of air temperature and atmospheric precipitation is given in this paper. Also the paper considered the dynamics of the Tviberi and Tsaneri glaciers, which were the Georgia's largest glaciers at the end of the 19th century. We used the catalog of the glaciers of the southern slope of the Caucasus compiled in 1911 by a well-known researcher of the Caucasus K. Podozerskiy, which was drawn up on the basis of the 19th century maps. In order to identify the area and number of the glaciers of the 60s of the 20th century, we used the work of R. Gobejishvili-the Georgian glaciologist of the 20th-21st centuries, composed on the basis of 1:50,000 scale topographic maps of 1960. The data of 2014 have been obtained by the Landsat aerial images of L8 OLI/TIRS (Operational Land Imager and Thermal Infrared Sensor) taken in August 2014. In the mentioned study, except of the old topographic maps and aerial images, we used the climate information especially air temperature and precipitation data of the Mestia weather station.

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“…For this purpose we use the atmospheric precipitation and air temperature data of Mestia meteorological station [25] from 1906 to 2013 inclusive. The mentioned weather station is located in the north-east from the Dolra basin at about 20 kilometers away at a height of 1440 m above sea level and at present it is the only active weather stations in the Zemo Svaneti region.…”

Section: Discussionmentioning

confidence: 99%

Glaciers Amount and Extent Change in the Dolra River Basin in 1911-1960-2014 Years, Caucasus Mountains, Georgia, Observed with Old Topographical Maps and Landsat Satellite Imagery

Tielidze¹,

Chikhradze²,

Svanadze³

2015

AJCC

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The article presents the changes in the number and area of the Dolra River basin glaciers during the last century in connection with the climate elements. Dolra River basin is located in the southern slope of the Central Caucasus, in the territory of Zemo Svaneti and joins the Enguri River basin, which in its turn is the main center of the contemporary glaciation in Georgia. During the study, we used the 1:42,000 scale topographic maps of the 19th century, which were drawn up during the first topographic survey by using the plane -table surveying

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Glaciers Fluctuation over the Last Half Century in the Headwaters of the Enguri River, Caucasus Mountains, Georgia

Cited by 6 publications

References 30 publications

The sources of high airborne radioactivity in cryoconite holes from the Caucasus (Georgia)

The sources of high airborne radioactivity in cryoconite holes from the Caucasus (Georgia)

Glaciers Reduction and Climate Change Impact over the Last One Century in the Mulkhura River Basin, Caucasus Mountains, Georgia

Glaciers Amount and Extent Change in the Dolra River Basin in 1911-1960-2014 Years, Caucasus Mountains, Georgia, Observed with Old Topographical Maps and Landsat Satellite Imagery

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