Elevated mercury accumulation in a peat bog of the Magellanic Moorlands, Chile (53°S) - an anthropogenic signal from the Southern Hemisphere

Details Elevated mercury accumulation in a peat bog of the Magellanic Moorlands, Chile (53°S) - an anthropogenic signal from the Southern Hemisphere Elevated mercury accumulation in a peat bog of the Magellanic Moorlands, Chile (53°S) - an anthropogenic signal from the Southern Hemisphere

Aug 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002e%26psl.201..609b&link_type=abstract

Earth and Planetary Science Letters, Volume 201, Issue 3-4, p. 609-620.

Other

4

Scientific paper

Increasing mercury deposition rates in the Northern Hemisphere recorded in natural archives such as peat bogs or lake sediments have been documented in numerous studies. However, data on atmospheric Hg deposition in the Southern Hemisphere dating back to pre-industrial times are rare. Here, we provide a continuous record of atmospheric Hg deposition in the Southern Hemisphere recorded by an ombrotrophic peat bog of the Magellanic Moorlands, Chile (53°S), extending back 3000 yr. Pre-industrial mercury accumulation rates range between 2.5 and 3.9 μg/m2/yr. In the past 100 yr, Hg accumulation rates increased 18-fold from about 3 μg/m2/yr to a maximum of 62.5 μg/m2/yr. If Hg accumulation rates were normalized to peat accumulation rates, maximum rates were 7.9 μg/m2/yr, which is only 2.5 times the pre-industrial rates. Thus, Hg accumulation rates normalized to peat accumulation rates are more comparable to the three-fold net increase in atmospheric Hg concentrations estimated for the same period. We suggest that the increase in Hg accumulation rates in the Magellanic Moorlands within the past 100 yr is at least partly attributed to global dispersion of Hg derived from anthropogenic sources in the Northern Hemisphere. The finding that no increase of atmospheric deposition of Pb could be observed in the bog indicates the extraordinary long-range transport and ubiquitous dispersion of anthropogenic derived gaseous Hg compared to other metals.

Affiliated with

Also associated with

No associations

Rating

Elevated mercury accumulation in a peat bog of the Magellanic Moorlands, Chile (53°S) - an anthropogenic signal from the Southern Hemisphere does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Elevated mercury accumulation in a peat bog of the Magellanic Moorlands, Chile (53°S) - an anthropogenic signal from the Southern Hemisphere, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Elevated mercury accumulation in a peat bog of the Magellanic Moorlands, Chile (53°S) - an anthropogenic signal from the Southern Hemisphere will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1677546