PMID- 21077604
OWN - NLM
STAT- MEDLINE
DCOM- 20110225
LR  - 20131121
IS  - 1520-5851 (Electronic)
IS  - 0013-936X (Linking)
VI  - 45
IP  - 1
DP  - 2011 Jan 1
TI  - The missing piece: sediment records in remote Mountain lakes confirm glaciers 
      being secondary sources of persistent organic pollutants.
PG  - 203-8
LID - 10.1021/es1028052 [doi]
AB  - After atmospheric deposition and storage in the ice, glaciers are temporary 
      reservoirs of persistent organic pollutants (POPs). Recently, the hypothesis that 
      melting glaciers represent secondary sources of these pollutants has been 
      introduced by investigations of the historical trend of POPs in a dated sediment 
      core from the proglacial Alpine Lake Oberaar. Here, the hypothesis is further 
      confirmed by the comparison of sediment data gathered from two Alpine lakes with 
      a glaciated and a nonglaciated hydrological catchment. The two lakes (Lake 
      Engstlen and Lake Stein in the Bernese Alps in Switzerland) are situated only 8 
      km apart at similar altitude and in the same meteorological catchment. In the 
      nonglacial lake sediment of Lake Engstlen, PCBs and DDT (polychlorinated 
      biphenyls and dichlorodiphenyl trichloroethane) levels culminated with the 
      historic usage of these chemicals some 30-50 years ago. In the glacial Lake 
      Stein, this peak was followed by a reincrease in the 1990s, which goes along with 
      the accelerated melting of the adjacent glacier. This study confirms the 
      hypothesis of glaciers being a secondary source of these pollutants and is in 
      accordance with the earlier findings in Lake Oberaar.
FAU - Schmid, Peter
AU  - Schmid P
AD  - Empa, Swiss Federal Laboratories for Materials Testing and Research, 
      Uberlandstrasse 129, CH-8600 Dubendorf, Switzerland. peter.schmid@empa.ch
FAU - Bogdal, Christian
AU  - Bogdal C
FAU - Bluthgen, Nancy
AU  - Bluthgen N
FAU - Anselmetti, Flavio S
AU  - Anselmetti FS
FAU - Zwyssig, Alois
AU  - Zwyssig A
FAU - Hungerbuhler, Konrad
AU  - Hungerbuhler K
LA  - eng
PT  - Journal Article
DEP - 20101115
PL  - United States
TA  - Environ Sci Technol
JT  - Environmental science & technology
JID - 0213155
RN  - 0 (Organic Chemicals)
RN  - 0 (Water Pollutants, Chemical)
RN  - CIW5S16655 (DDT)
RN  - DFC2HB4I0K (Polychlorinated Biphenyls)
SB  - IM
MH  - DDT/analysis
MH  - Environmental Monitoring
MH  - Fresh Water/*chemistry
MH  - Geologic Sediments/*chemistry
MH  - Global Warming
MH  - Ice Cover/*chemistry
MH  - Organic Chemicals/*analysis
MH  - Polychlorinated Biphenyls/analysis
MH  - Switzerland
MH  - Water Pollutants, Chemical/*analysis
MH  - Water Pollution, Chemical/statistics & numerical data
EDAT- 2010/11/17 06:00
MHDA- 2011/02/26 06:00
CRDT- 2010/11/17 06:00
PHST- 2010/11/17 06:00 [entrez]
PHST- 2010/11/17 06:00 [pubmed]
PHST- 2011/02/26 06:00 [medline]
AID - 10.1021/es1028052 [doi]
PST - ppublish
SO  - Environ Sci Technol. 2011 Jan 1;45(1):203-8. doi: 10.1021/es1028052. Epub 2010 
      Nov 15.