Atmosphere-to-snow-to-firn transfer of NO<sub>3</sub><sup>−</sup> on Ürümqi glacier No. 1, eastern Tien Shan, China

Zhao, Zhenyu; Li, Z.; Edwards, Ross; Wang, F.; Li, H.; Zhu, Yanzi

doi:10.3189/172756406781812410

Cited by 17 publications

(14 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Higher contributions of NO − 3 in aerosols than snowpits cannot be simply concluded as an increase in anthropogenic aerosol concentrations in this region between 1989 and 2009, due to the complicated air-to-snow-tofirn transfer processes. According to the study by Zhao et al (2006), nitrate was found to be highly mobile in the snowpack, and appeared to be preferentially leached downward into the ice layer, thus, concentrations of NO − 3 seemed lower in snowpits. Due to the complicated transfer processes, only use the NO − 3 in snowpits cannot reflect whether there were anthropogenic pollutions affecting this region in 1989.…”

Section: Comparison With Data Of the Previous Study And Other Areasmentioning

confidence: 94%

Ion chemistry and individual particle analysis of atmospheric aerosols over Mt. Bogda of eastern Tianshan Mountains, Central Asia

Zhao

Zhou

2010

Environ Monit Assess

Self Cite

View full text Add to dashboard Cite

Aerosol samples were collected during the scientific expedition to Mt. Bogda in July-August, 2009. The major inorganic ions (Na( + ), NH⁺₄, K( + ), Mg(2 + ), Ca(2 + ), Cl( - ), SO²⁻₄, and NO⁻₃) of the aerosols were determined by ion chromatography. SO²⁻₄, NO⁻₃, and Ca(2 + ) were the dominate ions, with the mean concentrations of 0.86, 0.56, and 0.28 μg m⁻³, respectively. These mean ion concentrations were generally comparable with the background conditions in remote site of Xinjiang, while much lower than those in Ürümqi. Morphology and elemental compositions of 1,500 particles were determined by field emission scanning electron microscopy equipped with an energy dispersive X-ray spectrometer. Based on the morphology and elemental compositions, particles were classed into four major groups: soot (15.1%), fly ash (4.7%), mineral particles (78.9%), and little other matters (0.8% Fe-rich particles and 0.5% unrecognized particles). Presence of soot and fly ash particles indicated the influence of anthropogenic pollutions, while abundance mineral particles suggested that natural processes were the primary source of aerosols over this region, coinciding with the ionic analysis. Backward air mass trajectory analysis suggested that Ürümqi may contribute some anthropogenic pollution to this region, while the arid and semi-arid regions of Central Asia were the primary source.

show abstract

Section: Comparison With Data Of the Previous Study And Other Areasmentioning

confidence: 94%

Ion chemistry and individual particle analysis of atmospheric aerosols over Mt. Bogda of eastern Tianshan Mountains, Central Asia

Zhao

Zhou

2010

Environ Monit Assess

Self Cite

View full text Add to dashboard Cite

show abstract

“…Two apparent high peaks (Figure 3a (Figure 3) from 19 March to 17 April. This was mainly related to small precipitation events, low temperatures (always below zero), and weak evaporation during this period, which enabled post-depositional processes such as sublimation and dry deposition to become more dominant [40,41]. Especially, little melt occurred under the condition, which partially contributed to high values of Ca 2+ and other major ions in the surface of the snowpit.…”

Section: Elution Processmentioning

confidence: 96%

Seasonal Variability and Evolution of Glaciochemistry at An Alpine Temperate Glacier on the Southeastern Tibetan Plateau

Wang

Shi

Cao

et al. 2018

Water

View full text Add to dashboard Cite

Temperate glaciers are highly sensitive to climatic and environmental changes. Studying the chemical composition of snow, firn, and ice on temperate glaciers is important for understanding the variations in atmospheric circulation patterns, deposition conditions, and melting processes. To define snowpack chemistry and environmental significance, seven snowpacks (one snowpack in late autumn, two in winter, two in spring, and two in summer) were sampled in 2008/2009 on Baishui Glacier No. 1 in Mt. Yulong. Soluble ions in the winter snowpacks showed low values in the middle part but high values in the lower and upper parts, influenced by the atmospheric deposition of snow accumulation. The larger variations of ionic concentrations in the spring snowpacks were associated with the variable atmospheric patterns with high dust content in spring, leading to high ionic concentrations in the upper snowpack. Strong meltwater percolation resulted in quick migration and redistribution of ions for the profiles during the monsoon period. The ion elution sequence was Ca 2+ > SO 4 2− > NH 4 + > K + > NO 3 − > Na + > Cl − > Mg 2+ . Factor analysis showed that NO 3 − , SO 4 2− , NH 4 + were mainly supplied by wet deposition-plus-anthropogenic input, while Cl − and Na + originated from marine sources. Ca 2+ and Mg 2+ had multiple sources and the local terrestrial source was important because of locally exposed carbonate. The results suggest that chemical concentrations reflect mainly impurities supplied by atmospheric circulation and precipitation during periods of snow accumulation, as well as during the melting process.

show abstract

“…The sampling site, which is also known as the PGPI site, is in the percolation zone at the east branch of UG1 at an altitude of 4 130 m a.s.l. (Dong et al, 2010;Li Z Q et al, 2008Li Z Q et al, , 2006Wang et al, 2008Wang et al, , 2006Li X Y et al, 2007;Zhao et al, 2006). There is no direct wintertime exposure to sunshine due to the shadowing effect of the mountain ridges at the sampling site .…”

Section: Site Descriptionmentioning

confidence: 92%

Selected trace elements in snowpack on Urumqi Glacier No. 1, eastern Tianshan, China: As yielded by leaching treatment representative of real-world environmental conditions

Zhang

Wang

et al. 2011

J. Earth Sci.

Self Cite

View full text Add to dashboard Cite

To investigate the seasonal variability and potential environmental significance of trace elements in mountain glaciers, the surface snow and snow pit samples were collected at Urumqi Glacier No. 1 (43º06'N, 86º49'E, 4 130 m a.s.l.), eastern Tianshan (天山), from September 2002 to September 2003, and analyzed for Li, V, Cr, Mn, Co, Cu, and Ba. The samples were acidified (leached) in a manner intended to reasonably approximate the extent to which the natural hydrologic and weathering cycles would liberate elements from mineral grains (dusts) in the ice and snow into the environment. The mean concentrations of Li, V, Cr, Mn, Co, Cu, and Ba are 0.2, 1.1, 0.8, 14.8, 0.1, 0.7, and 3.2 ng/g in surface snow but 1.0, 2.2, 1.8, 92.4, 0.8, 2.9, and 16.2 ng/g in snow pits, respectively. seasonally: in general, concentrations in the winter are higher than those in the summer. The trace elements are somewhat enriched (relative to expected abundances in material taken directly from the earth's crust) and similar to what is observed in both pre-industrial and modern atmospheric dusts, although some anthropogenic components from nearby industrial cities may be present. Concentration vertical profiles can be redistributed in the post-depositional process, which may cause loss of trace elements in the summer. KEY WORDS: trace element, snowpack, postdepositional process, Urumqi Glacier No. 1.

show abstract

Atmosphere-to-snow-to-firn transfer of NO₃⁻ on Ürümqi glacier No. 1, eastern Tien Shan, China

Cited by 17 publications

References 16 publications

Ion chemistry and individual particle analysis of atmospheric aerosols over Mt. Bogda of eastern Tianshan Mountains, Central Asia

Ion chemistry and individual particle analysis of atmospheric aerosols over Mt. Bogda of eastern Tianshan Mountains, Central Asia

Seasonal Variability and Evolution of Glaciochemistry at An Alpine Temperate Glacier on the Southeastern Tibetan Plateau

Selected trace elements in snowpack on Urumqi Glacier No. 1, eastern Tianshan, China: As yielded by leaching treatment representative of real-world environmental conditions

Contact Info

Product

Resources

About

Atmosphere-to-snow-to-firn transfer of NO3− on Ürümqi glacier No. 1, eastern Tien Shan, China

Cited by 17 publications

References 16 publications

Ion chemistry and individual particle analysis of atmospheric aerosols over Mt. Bogda of eastern Tianshan Mountains, Central Asia

Ion chemistry and individual particle analysis of atmospheric aerosols over Mt. Bogda of eastern Tianshan Mountains, Central Asia

Seasonal Variability and Evolution of Glaciochemistry at An Alpine Temperate Glacier on the Southeastern Tibetan Plateau

Selected trace elements in snowpack on Urumqi Glacier No. 1, eastern Tianshan, China: As yielded by leaching treatment representative of real-world environmental conditions

Contact Info

Product

Resources

About

Atmosphere-to-snow-to-firn transfer of NO₃⁻ on Ürümqi glacier No. 1, eastern Tien Shan, China