@article{
 title = {Spatial trends and historical profiles of organochlorine pesticides in Arctic lake sediments},
 type = {article},
 year = {1995},
 identifiers = {[object Object]},
 keywords = {ARCTIC,CARBON,CHLORDANE,CONTAMINANTS,DDT,ELA,GAS EXCHANGE,HCH,L375,L382,OCS,Ontario,PALEOLIMNOLOGY-GEOCHEMISTRY,PCBS,PESTICIDES,PROFILES,SEDIMENT FOCUSING,SEDIMENTATION,Sediments,TOXAPHENE},
 pages = {447-457},
 volume = {160-161},
 id = {e9ed35ef-23f6-3d23-a740-868f7bd070df},
 created = {2019-07-12T15:07:56.942Z},
 file_attached = {true},
 profile_id = {3c181434-ae75-3e95-a723-2bfcc2f14c0b},
 group_id = {db3318bf-b2fb-3b86-9f1d-17188c0ddfa3},
 last_modified = {2019-07-24T18:18:49.841Z},
 read = {false},
 starred = {false},
 authored = {false},
 confirmed = {true},
 hidden = {false},
 citation_key = {Muir1995a},
 private_publication = {false},
 abstract = {Sediment cores were collected from eight remote lakes in Canada, along a mid-continental transect from 49°N to 82°N, with the objective of examining latitudinal and temporal differences in deposition of a wide range of persistent, semi-volatile, organochlorine (OC) pesticides such as DDT, dieldrin, hexachlorobenzene (HCB), hexachlorocyclohexane (HCH), and toxaphene. Samples were collected with a specially constructed ballot box corer (30 × 30 cm), or with large (10-cm) KB corers, from the deep basins of lakes at the Experimental Lakes Area (ELA) (49°30′N), Saqvacjuaq (63°39′N), Cornwallis Island (75°07′N), Axel Heiberg Island (79°N), and Northern Ellesmere Island (Lake Hazen; 82°N). Sediment slices were dated using 210 Pb and 137 Cs. Sediment extracts were analyzed by high-resolution GC-ECD with confirmation by GC-MS. Concentrations of total DDT ( ΣDDT) in surface sediments (0-1.3 cm depth) declined significantly with latitude from 9.7 ng/g (dry wt.) in ELA sediments to 0.10 ng/g in Lake Hazen. HCB levels showed a reverse trend; organic carbon normalized concentrations increased with latitude. Concentrations of other OC pesticides (total HCH, total chlordane, toxaphene, and dieldrin) were generally in the range of 0.1-3 ng/g, with the sites at 63°N and 75°N generally having the highest levels. The profiles of ΣDDT and total chlorobenzenes in all the mid-continental lakes showed maxima in slices dated from the late 1970s to the 1980s, which is about 5-10 years later than maxima reported for Lake Ontario. The results generally support several of the predictions of the cold condensation hypothesis. © 1995 Elsevier Science B.V. All rights reserved.},
 bibtype = {article},
 author = {Muir, D. C. G. and Grift, N. P. and Lockhart, W. L. and Wilkinson, P. and Billeck, B. N. and Brunskill, G. J.},
 journal = {Science of the Total Environment},
 number = {C}
}

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Samples were collected with a specially constructed ballot box corer (30 × 30 cm), or with large (10-cm) KB corers, from the deep basins of lakes at the Experimental Lakes Area (ELA) (49°30′N), Saqvacjuaq (63°39′N), Cornwallis Island (75°07′N), Axel Heiberg Island (79°N), and Northern Ellesmere Island (Lake Hazen; 82°N). Sediment slices were dated using 210 Pb and 137 Cs. Sediment extracts were analyzed by high-resolution GC-ECD with confirmation by GC-MS. Concentrations of total DDT ( ΣDDT) in surface sediments (0-1.3 cm depth) declined significantly with latitude from 9.7 ng/g (dry wt.) in ELA sediments to 0.10 ng/g in Lake Hazen. HCB levels showed a reverse trend; organic carbon normalized concentrations increased with latitude. Concentrations of other OC pesticides (total HCH, total chlordane, toxaphene, and dieldrin) were generally in the range of 0.1-3 ng/g, with the sites at 63°N and 75°N generally having the highest levels. The profiles of ΣDDT and total chlorobenzenes in all the mid-continental lakes showed maxima in slices dated from the late 1970s to the 1980s, which is about 5-10 years later than maxima reported for Lake Ontario. The results generally support several of the predictions of the cold condensation hypothesis. © 1995 Elsevier Science B.V. All rights reserved.","bibtype":"article","author":"Muir, D. C. G. and Grift, N. P. and Lockhart, W. L. and Wilkinson, P. and Billeck, B. N. and Brunskill, G. 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Samples were collected with a specially constructed ballot box corer (30 × 30 cm), or with large (10-cm) KB corers, from the deep basins of lakes at the Experimental Lakes Area (ELA) (49°30′N), Saqvacjuaq (63°39′N), Cornwallis Island (75°07′N), Axel Heiberg Island (79°N), and Northern Ellesmere Island (Lake Hazen; 82°N). Sediment slices were dated using 210 Pb and 137 Cs. Sediment extracts were analyzed by high-resolution GC-ECD with confirmation by GC-MS. Concentrations of total DDT ( ΣDDT) in surface sediments (0-1.3 cm depth) declined significantly with latitude from 9.7 ng/g (dry wt.) in ELA sediments to 0.10 ng/g in Lake Hazen. HCB levels showed a reverse trend; organic carbon normalized concentrations increased with latitude. Concentrations of other OC pesticides (total HCH, total chlordane, toxaphene, and dieldrin) were generally in the range of 0.1-3 ng/g, with the sites at 63°N and 75°N generally having the highest levels. 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