Seasonal variations in the origin of lead in snow at Dye 3, Greenland

Details Seasonal variations in the origin of lead in snow at Dye 3, Greenland Seasonal variations in the origin of lead in snow at Dye 3, Greenland

Aug 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998e%26psl.160..383r&link_type=abstract

Earth and Planetary Science Letters, vol. 160, Issue 3-4, pp.383-389

Computer Science

2

Lead, Isotope Ratios, Greenland, Snow, Seasonal Variations

Scientific paper

The isotopic composition and concentration of lead has been measured in fresh and slightly aged snow collected at Dye 3 in southern Greenland during one full year. The lead concentration displayed large variations ranging from 14-3016 pg/g in April (spring) to 3-6 pg/g in September (summer) while the isotopic ratios changed in regular manner during the year. The 206 Pb/ 207 Pb ratios were ~1.15 from spring to mid-summer snow, and increased in late summer to early autumn, reaching ~1.20 in winter. These isotopic data indicate that the lead in the autumn to winter snow originated in North America, while that in spring to mid-summer snow is from Eurasia.

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