Hydrochemical composition of glacial lakes on inshore Russian Antarctic stations

Онищук, Н. А.; Голобокова, Л. П.; Vershinin, K. E.; Жученко, Н.А.

doi:10.1016/j.chemer.2019.125591

Cited by 2 publications

(5 citation statements)

References 24 publications

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“…По данным более ранних исследований [25], водоемы оазиса Ширмахера относятся к хлоридно-натриевым III типа, а для озер п-ова Файлдс определено, что они, по большей части, хлоридно-натриевые II типа. Согласно [9] озера Китеж, Слаломное и Длинное п-ова Файлдс классифицированы как хлоридно-сульфатные и сульфатно-хлоридные, при этом отмечена изменчивость класса озер от года к году. Так, для описанного в работе 2020 г. оз.…”

Section: дискуссияunclassified

“…Проведенные в январе-феврале 2020 г. исследования показали разнообразие параметров озер и небольших, зачастую временных, водных объектов. Водные экосистемы изменяются в течение непродолжительного летнего сезона, но в целом остаются довольно постоянными за многолетний период, что подтверждает выполненное сравнение характеристик за ряд лет [19,2,9,12]. Можно только отметить наличие заболоченных территорий в некоторых долинах ручьев и приморских территориях, хотя это тоже, скорее всего, циклично, т. к. остатки мха были найдены в разрезах приледниковых морен [13].…”

Section: заключениеunclassified

“…Описание озер антарктических оазисов, ландшафтов, биоразнообразия и факторов, влияющих на формирование экосистем, подробно дано в обзорах [4][5][6][7][8] и др. Геохимический анализ озер рассматривался в работах [2,9,10] и др. В работе [9] представлены гидрохимические сведения относительно только двенадцати ранее хорошо изученных озер оазисов Холмы Ларсеманн и п-ова Файлдс.…”

Section: Introductionunclassified

“…Геохимический анализ озер рассматривался в работах [2,9,10] и др. В работе [9] представлены гидрохимические сведения относительно только двенадцати ранее хорошо изученных озер оазисов Холмы Ларсеманн и п-ова Файлдс. Более детальные, обширные и близкие к нашему исследованию работы были выполнены чешскими исследователями в 2013 г.…”

Section: Introductionunclassified

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Adaptation of Fildes Peninsula Lakes (King George Island, East Antarctica) to climate change and anthropogenic impacts

Fedorova,

Chernova,

Evgrafova

et al. 2024

Problemy Arktiki i Antarktiki

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The load on the Antarctic oases has been recently increasing, with intensive research carried out by various countries and ecological tourism developing. This leads to an increase in the impact on the aquatic ecosystems of the lakes and streams in addition to the warming climate and glacier melting. This paper presents findings from a study of the Fildes Peninsula (King George Island) lakes’ aquatic ecosystems in the summer period of January–February 2020. In addition to results of hydrological and hydrochemical studies, the paper provides data from measurements of the self-cleaning ability of representative oasis lakes, as well as greenhouse gas fluxes from the lakes surface. The water level of the streams decreased 5 times over the summer season, and the water discharge — 10 times. The streams flowing from the glacier have the fullest water. The lakes have a neutral reaction, sometimes weakly alkaline; they are well aerated: the average value of dissolved oxygen in water is 85 %, occasionally supersaturation of up to 137% was observed. The concentration of nutrients in the water has amplitudes that are considerable for Antarctic oases lakes. A significant correlation can only be observed between nitrates and phosphates, and also between the water turbidity and the nutrients’ concentration. Maximum turbidity is observed in lakes with abundant content of bacterial mats. Most of the lakes have hydrochemical type II sodium chloride waters. The assessment of the lake self-cleaning ability using the ratio of destruction and organic matter production showed the general ability of ecosystems to cope with external (natural) pressures on ecosystems, but not in all cases. Eutrophication of the lakes and stream valleys is also noted. Carbon dioxide (CO2) absorption was observed in most of the streams and lakes, in some of them — methane (CH4) absorption as well. However, CH4 is generally emitted from the surface of the lakes. The largest values are recorded for small lakes located on glacial moraines and in places where ornithosoils are present. The agreement of the findings from the hydroecological studies of the Fildes peninsula lakes with those presented earlier by other authors makes it possible to conclude that there is a certain resistance of the lakes to climatic changes, but one can already talk about a significant anthropogenic impact on the freshwater oasis ecosystems.

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Section: дискуссияunclassified

Section: заключениеunclassified

Section: Introductionunclassified

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Adaptation of Fildes Peninsula Lakes (King George Island, East Antarctica) to climate change and anthropogenic impacts

Fedorova,

Chernova,

Evgrafova

et al. 2024

Problemy Arktiki i Antarktiki

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“…The results of hydrochemical analysis of ionic composition, organic matter and mineralization show low ionic content in lake water and possible hydrochemical enrichment associated with seawater (Onishchuk et al, 2020). The USGS classification (Hem, 1970in Setiawan et al, 2017 states that fresh water usually has a Ca-HCO3 facies, whereas the Na-HCO3 facies indicate fresh to slightly salty water, and the Na-Cl facies indicate saltyvery salty water.…”

Section: Hydrochemical Facies Of Groundwatermentioning

confidence: 99%

Hydrochemical of Groundwater and the Potential of Sea Water Intrusion in Tanah Laut, South Kalimantan

Putranto¹

2021

Proceedings of the 5th International Conference of Geological Engineering Faculty

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The Tanah Laut area in South Kalimantan Province is a rapidly developing area, in line with the plan to relocate the country's capital. Therefore, the need for groundwater as a water resource in community life in that area needs to be supported by various studies. This research is intended as a hydrogeological survey in Tanah Laut District, to determine the local groundwater hydrochemistry and its potential for sea water intrusion. The research was conducted in the field by collecting data on the physical properties of groundwater in 155 dug wells and 50 artesian wells. Several groundwater samples representing free and confined aquifers were tested for physical/chemical properties in the laboratory. The analysis was performed based on groundwater table, pH, electrical conductivity (EC) and groundwater facies. The results showed that free groundwater has a pH of 6.1 -8.4 and a total dissolved solid (TDS) ranged from 20.3 -964 μS/cm, while the confined groundwater had a pH of 4.01 -9.95 and a TDS of 28 -2,670 μS/cm. Groundwater facies vary widely, generally dominated by Na and bicarbonate ions. Brackish groundwater was found in confined aquifers in two locations, namely Asam Jaya and Mekar Sari, indicating that the research area has the potential of sea water intrusion.

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Hydrochemical composition of glacial lakes on inshore Russian Antarctic stations

Cited by 2 publications

References 24 publications

Adaptation of Fildes Peninsula Lakes (King George Island, East Antarctica) to climate change and anthropogenic impacts

Adaptation of Fildes Peninsula Lakes (King George Island, East Antarctica) to climate change and anthropogenic impacts

Hydrochemical of Groundwater and the Potential of Sea Water Intrusion in Tanah Laut, South Kalimantan

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