Comparison of Sr–Nd–Pb isotopes in insoluble dust between northwestern China and high-latitude regions in the Northern Hemisphere

Du, Zhiheng; Xiao, Cunde; Dou, Tingfeng; Li, Shutong; An, Hongmin; Liu, Shiwei; Liu, Ke

doi:10.1016/j.atmosenv.2019.116837

Cited by 7 publications

(14 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Arctic snow samples show comparably low (less-radiogenic) Pb isotope ratios, suggesting a pollution source similar to the Denali snow samples. 22 Taken together, the data from the three sites form a tight linear array that indicates primarily two-component mixing ( Figure 4 B). One end-member appears to be mineral dust, with relatively high 206 Pb/ 207 Pb and 208 Pb/ 207 Pb (refs ( 32 ) and ( 51 )), while the other end-member strongly indicates a pollution source.…”

Section: Resultsmentioning

confidence: 78%

“…The remainder of the pollution contribution, representing 21–64% of the Pb delivered to high-elevation sites in Denali National Park, depending on the site, comes from Chinese pollution sources ( Figure 6 ). Results for the Barrow and Arctic Ocean sites 22 are comparable to the Denali snow pits, with 37% and 64% of their Pb sourced from China, respectively. Our results, showing that the major proportion of Pb deposited at high elevations and high latitudes in northwestern North America comes from Chinese pollution sources ( Figure 6 ), are likely representative of high-altitude aerosol transport in the North Pacific and western Arctic more generally and provide an important geochemical benchmark for future studies.…”

Section: Resultsmentioning

confidence: 79%

“…Denali snow data can be compared to paired Sr-Nd-Pb measurements on surface snow samples collected from Barrow, AK in April–May 2015, and from the Chukchi Sea sector of the Arctic Ocean ( Figure 1 ) in August 2016 (ref. 22 ), allowing for an assessment of both dust and pollution sources along a latitudinal gradient in northwestern North America. The Barrow and Arctic Ocean sites have Sr-Nd compositions similar to those from high-elevation sites in the Alaska Range, but with a greater contribution of Chinese desert dust (i.e., lower εNd, higher Sr ratios) ( Figure 3 ).…”

Section: Resultsmentioning

confidence: 99%

“…The major portion (21–64%) of pollution Pb deposited in high-elevation and high-latitude sites can be attributed to Chinese pollution sources, with lesser contributions (totaling 5–16%) from Japan, South Korea, and Russia. The Barrow and Arctic Ocean data are from ref ( 22 ).…”

Section: Resultsmentioning

confidence: 99%

See 3 more Smart Citations

Provenance of Anthropogenic Pb and Atmospheric Dust to Northwestern North America

Koffman

Saylor

Zhong

et al. 2022

Environ. Sci. Technol.

View full text Add to dashboard Cite

Industrial activities release aerosols containing toxic metals into the atmosphere, where they are transported far from their sources, impacting ecosystems and human health. Concomitantly, long-range-transported mineral dust aerosols play a role in Earth’s radiative balance and supply micronutrients to iron-limited ecosystems. To evaluate the sources of dust and pollutant aerosols to Alaska following the 2001 phase-out of leaded gasoline in China, we measured Pb-Sr-Nd isotopic compositions of particles collected in 2016 from snow pits across an elevational transect (2180–5240 m-a.s.l) in Denali National Park, USA. We also determined Pb flux and enrichment from 1991–2011 in the Denali ice core (3870 m-a.s.l). Chinese coal-burning and non-ferrous metal smelting account for up to 64% of Pb deposition at our sites, a value consistent across the western Arctic. Pb isotope ratios in the aerosols did not change between 2001 and 2016, despite the ban on lead additives. Emissions estimates demonstrate that industrial activities have more than compensated for the phase-out of leaded gasoline, with China emitting ∼37,000 metric tons year –1 of Pb during 2013–2015, approximately 78% of the Pb from East Asia. The Pb flux to Alaska now equals that measured in southern Greenland during peak pollution from North America.

show abstract

Section: Resultsmentioning

confidence: 78%

Section: Resultsmentioning

confidence: 79%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Provenance of Anthropogenic Pb and Atmospheric Dust to Northwestern North America

Koffman

Saylor

Zhong

et al. 2022

Environ. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…Although dust originating from low latitudes is detectable in the Arctic (vanCuren et al, 2012; Varga et al, 2021), it is increasingly recognized that dust sourced from high latitudes is important locally and regionally (Bullard, 2017). Both models and field data suggest that most northern hemisphere high latitude dust is retained within the Arctic region (Du et al, 2019; Groot Zwaaftink et al, 2016) where it influences cryospheric, atmospheric, and marine and terrestrial ecological processes (Boy et al, 2019). For example dust derived from proglacial sources and deposited on the adjacent ice‐masses can influence ice albedo and increase ice melt rates (Oerlemans et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Annual and seasonal variability in high latitude dust deposition, West Greenland

Soest

Bullard

Prater

et al. 2022

Earth Surf Processes Landf

View full text Add to dashboard Cite

High latitude regions (≥ 50 N and ≥ 40 S) are thought to contribute substantially to contemporary global dust emissions which can influence biogeochemical cycling as well as geomorphic, cryospheric and atmospheric processes. However, there are few measurements of the emission or deposition of dust derived from these areas that extend beyond a single event or season. This article reports the deposition of locally-derived dust to an ice-free area of West Greenland over 2 years from 23 traps distributed across five sampling sites. Local dust sources include glacial outwash plains, glacially-derived delta deposits and the reworking of loessic soils. Annual dust deposition is estimated at 37.3 to 93.9 g m À2 for 2017-2018 and 9.74 to 28.4 g m À2 in 2018-2019. This annual variation is driven by high deposition rates observed in spring 2017 of 0.48 g m À2 d À1 compared to the range of 0.03 to 0.07 g m À2 d À1 during the rest of the monitoring period. The high deposition rates in spring 2017 were due to warmer than average conditions and high meltwater sediment supply that delivered large quantities of sediment to local outwash plains in 2016. For other seasons, dust deposition was lower over both autumn-winter periods (0.03 g m À2 d À1 ) than during the spring and summer (0.04-0.07 g m À2 d À1 ). When sediment availability is limited, dust deposition increases with increasing temperature and wind speed.Secondary data from dust-related weather type/observation codes and visibility records were found to be inconsistent with measured dust deposition during the period of study. One possible reason for this is the complex nature of the terrain between the observation and sample sites. The dust deposition rates measured here and the infidelity of the observed dust with secondary data sources reveal the importance of direct quantification of dust processes to accurately constrain the dust cycle at high latitudes.

show abstract

A review of physicochemical properties of dissolved organic carbon and its impact over mountain glaciers

Niu,

Chen,

Kang

et al. 2024

J. Mt. Sci.

View full text Add to dashboard Cite

Comparison of Sr–Nd–Pb isotopes in insoluble dust between northwestern China and high-latitude regions in the Northern Hemisphere

Cited by 7 publications

References 37 publications

Provenance of Anthropogenic Pb and Atmospheric Dust to Northwestern North America

Provenance of Anthropogenic Pb and Atmospheric Dust to Northwestern North America

Annual and seasonal variability in high latitude dust deposition, West Greenland

A review of physicochemical properties of dissolved organic carbon and its impact over mountain glaciers

Contact Info

Product

Resources

About