Isotope composition of winter precipitation and snow cover in the foothills of the Altai

Malygina, Natalia; Эйрих, А. Н.; Kurepina, N. Yu.; Papina, Tatyana

doi:10.15356/2076-6734-2017-1-57-68

Cited by 9 publications

(6 citation statements)

References 16 publications

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“…According to previous observations in the Altay station on the southern slope of the Altai Mountains [35], the stable oxygen isotopes are enriched in summer and depleted in winter, and the annual range is approximately 20‰. Other observations along the mountain range also have a similar magnitude of intra-annual variation in precipitation isotopes [36,54]. Considering the inter-annual and intra-annual variability of stable water isotopes in precipitation in arid northwest China [37], the impact of below-cloud evaporation does not greatly modify the seasonal signals of stable isotopes in precipitation.…”

Section: Discussionsupporting

confidence: 51%

“…The stable water isotopes are a useful tool to understand hydrological circulation and water resource sustainability. However, studies on stable isotopes in modern precipitation are still limited across the Altai Mountains, especially on the southern slope [35][36][37]. In this study, we collected the hourly meteorological records at several stations on the southern slope of the Altai Mountains and examined the diurnal impact of below-cloud evaporation on isotope compositions of precipitation for this region, which is useful to understand stable water isotope fractionation on a diurnal scale in a typical westerly dominated region.…”

Section: Introductionmentioning

confidence: 99%

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Diurnal Impact of Below-Cloud Evaporation on Isotope Compositions of Precipitation on the Southern Slope of the Altai Mountains, Central Asia

et al. 2022

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Precipitation is an important natural resource relating to regional sustainability in arid central Asia, and the stable oxygen and hydrogen isotopes provide useful tracers to understand precipitation processes. In this study, we collected the hourly meteorological data at several stations on the southern slope of the Altai Mountains in arid central Asia, from March 2017 to June 2022, and examined the diurnal impact of below-cloud evaporation on stable isotope compositions of precipitation. During nighttime, the changes in isotope compositions below cloud base are generally weak. The enhanced impact of below-cloud evaporation can be found after around 15:00, and the impact is relatively strong in the afternoon, especially from 18:00 to 22:00. Summer and spring usually have a larger impact of below-cloud evaporation than autumn, and the winter precipitation is generally not influenced by below-cloud evaporation. On an annual basis, the differences in evaporation-led isotope changes between daytime and nighttime are 1.1‰ for stable oxygen isotope compositions, 4.0‰ for stable hydrogen isotope compositions and 4.7‰ for deuterium excess. The period from 2:00 to 10:00 shows relatively low sensitivity to relative humidity, and from 14:00 to 22:00 the impacts are sensitive. Considering the fluctuations of precipitation isotope compositions, the impact of below-cloud evaporation does not greatly modify the seasonal environmental signals.

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Section: Discussionsupporting

confidence: 51%

Section: Introductionmentioning

confidence: 99%

Diurnal Impact of Below-Cloud Evaporation on Isotope Compositions of Precipitation on the Southern Slope of the Altai Mountains, Central Asia

et al. 2022

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“…Non-ferrous metallurgy enterprises located in southern Siberia and northern Kazakhstan are another large source of Pb deposited in Western Siberia (Talovskaya 2022). A study of winter precipitation sources in the vicinities of Nadym has shown that cyclones coming from the west have a predominant effect on the composition of aerosols (Malygina et al 2020). According to the Nadym meteorological station, southern, southwestern, and southeastern winds prevailed during the cold period of 2021-2022.…”

Section: Discussionmentioning

confidence: 99%

Snow contamination by heavy metals and metalloids in a polar town (a case study of Nadym, Russia)

Moskovchenko,

Pozhitkov,

Soromotin

2023

Preprint

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The article presents the results of a study of snow composition in the town of Nadym (Western Siberia) During the studies conducted in 2021–2022, we determined dust load, concentrations and ratio of dissolved and suspended forms of metals and metalloids (MMs). In the background area, the snow composition depends on the long-range transport of pollutants. We analyzed air mass trajectories using the HYSPLIT model, and the analysis showed the industrial regions of the southern Urals, southeastern Siberia, and Kazakhstan to be the sources of MMs. The content of the insoluble fraction increases 23 times in the town. The dust load in Nadym is higher than in the urban communities situated in the temperate climate zone, although the town is smaller in population and has no large industrial enterprises. A significant increase in the dust load in the town leads to a ten- and hundredfold increase in the content of many MMs. Local soils (Fe, Al), vehicles (W), building dust (Mg, Ca), and anti-icing agents (Na) are the sources of pollution. We showcase that the high dust load is caused by meteorological factors which reduces the dispersion of pollution, such as temperature inversions and a large number of calm days. The case of Nadym demonstrates that winter air quality in polar settlements can be worse than in urban areas in the temperate zone even with few pollution sources. The trend towards an increase in the number of windless days, observed in Siberia as a result of global climate change, increases the risk of anthropogenic pollution of the atmosphere of polar cities.

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“…Isotope studies in Altai are primarily associated with the deep-core drilling of glaciers on the Belukhas plateau [8] and at the Tsambagarav massif in Northwestern Mongolia [9]. For the Altai Mountains and its foothills, isotope analysis of precipitation was performed and compared with model data [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Water Stable Isotopes in the Central Altai Mountainous Rivers as Indicator of Glacier Meltwater Fraction in Runoff

Bantcev,

Rasputina,

Ovsepian

et al. 2024

Water

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We used stable water isotopes (δ 18O and δ 2H) to identify the fractions of glacier meltwater and summer precipitation in the runoff in the Taldura River in the Altai mountains. The mean isotopic characteristics of glacier ice, snow, summer precipitation and river water were obtained. Using isotopic separation of hydrographs, we determined that glacier feeding completely prevails throughout the Taldura River in the middle of the ablation season. In general, the fraction of glacier meltwater in the Taldura River’s runoff in the ablation season varies from 80% to 95% depending on local weather conditions.

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Isotope composition of winter precipitation and snow cover in the foothills of the Altai

Cited by 9 publications

References 16 publications

Diurnal Impact of Below-Cloud Evaporation on Isotope Compositions of Precipitation on the Southern Slope of the Altai Mountains, Central Asia

Diurnal Impact of Below-Cloud Evaporation on Isotope Compositions of Precipitation on the Southern Slope of the Altai Mountains, Central Asia

Snow contamination by heavy metals and metalloids in a polar town (a case study of Nadym, Russia)

Water Stable Isotopes in the Central Altai Mountainous Rivers as Indicator of Glacier Meltwater Fraction in Runoff

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