Temperature dependance of the organochlorine compound distributions in the Andean Lakes
Organochlorine compounds (OC), namely pentachlorobenzene, hexachlorobenzene, hexachlorocyclohexanes, polychlorobiphenyls (PCBs), and DDTs, have been studied in mosses distributed over three altitude gradients of the Andean mountains in Chile at 18°S (3200−4500 m above sea level), 37°S (345−1330 m),...
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Online Access: | http://hdl.handle.net/11365/26303 https://doi.org/10.1021/es040051m |
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ftunivsiena:oai:usiena-air.unisi.it:11365/26303 2024-06-23T07:47:59+00:00 Temperature dependance of the organochlorine compound distributions in the Andean Lakes GRIMALT J. O. BORGHINI F. BARRA R. SANCHEZ HERNANDEZ J. C. TORRES GARCIA C. J. FOCARDI, SILVANO ETTORE Grimalt, J. O. Borghini, F. Barra, R. SANCHEZ HERNANDEZ, J. C. TORRES GARCIA, C. J. Focardi, SILVANO ETTORE 2004 STAMPA http://hdl.handle.net/11365/26303 https://doi.org/10.1021/es040051m eng eng info:eu-repo/semantics/altIdentifier/pmid/15543741 info:eu-repo/semantics/altIdentifier/wos/WOS:000224519500024 volume:38 issue:20 firstpage:5386 lastpage:5392 numberofpages:7 journal:ENVIRONMENTAL SCIENCE & TECHNOLOGY http://hdl.handle.net/11365/26303 doi:10.1021/es040051m info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-6044223561 info:eu-repo/semantics/closedAccess Temperature organochlorine compound polychlorobiphenyls (PCBs) info:eu-repo/semantics/article 2004 ftunivsiena https://doi.org/10.1021/es040051m 2024-06-11T14:09:35Z Organochlorine compounds (OC), namely pentachlorobenzene, hexachlorobenzene, hexachlorocyclohexanes, polychlorobiphenyls (PCBs), and DDTs, have been studied in mosses distributed over three altitude gradients of the Andean mountains in Chile at 18°S (3200−4500 m above sea level), 37°S (345−1330 m), and 45°S (10−700 m). The observed concentrations range among the lowest values ever reported in remote sites, but they are still higher than those found in previously studied Antarctic areas. The log transformed OC concentrations show a significant linear dependence from reciprocal of temperature independently of the origin of the compounds, e.g. industrial, agricultural, or mixed. In the case of the more volatile OC these correlations involve variance percentages higher than 50%. This good agreement gives further ground to temperature as the driving factor for the retention of long-range transported OC in remote ecosystems, including those in the southern hemisphere such as the Andean mountains. In the context of the samples selected for study, the temperature dependences in the areas of similar latitude are related to altitude. Thus, all OC in the highest altitude gradient (18°S) and most compounds in the other two profiles (37°S and 45°S) exhibit higher concentrations with decreasing annual average temperature and thus increase with elevation above sea level. However, theoretical examination of the exponential equation relating OC concentrations to reciprocal of absolute temperatures shows that besides the temperature differences between highest and lowest elevation, the most relevant factor determining the OC concentration gradients is the lowest temperature value of each altitudinal series. That is, the point at highest elevation. Article in Journal/Newspaper Antarc* Antarctic Università degli Studi di Siena: USiena air Antarctic Environmental Science & Technology 38 20 5386 5392 |
institution |
Open Polar |
collection |
Università degli Studi di Siena: USiena air |
op_collection_id |
ftunivsiena |
language |
English |
topic |
Temperature organochlorine compound polychlorobiphenyls (PCBs) |
spellingShingle |
Temperature organochlorine compound polychlorobiphenyls (PCBs) GRIMALT J. O. BORGHINI F. BARRA R. SANCHEZ HERNANDEZ J. C. TORRES GARCIA C. J. FOCARDI, SILVANO ETTORE Temperature dependance of the organochlorine compound distributions in the Andean Lakes |
topic_facet |
Temperature organochlorine compound polychlorobiphenyls (PCBs) |
description |
Organochlorine compounds (OC), namely pentachlorobenzene, hexachlorobenzene, hexachlorocyclohexanes, polychlorobiphenyls (PCBs), and DDTs, have been studied in mosses distributed over three altitude gradients of the Andean mountains in Chile at 18°S (3200−4500 m above sea level), 37°S (345−1330 m), and 45°S (10−700 m). The observed concentrations range among the lowest values ever reported in remote sites, but they are still higher than those found in previously studied Antarctic areas. The log transformed OC concentrations show a significant linear dependence from reciprocal of temperature independently of the origin of the compounds, e.g. industrial, agricultural, or mixed. In the case of the more volatile OC these correlations involve variance percentages higher than 50%. This good agreement gives further ground to temperature as the driving factor for the retention of long-range transported OC in remote ecosystems, including those in the southern hemisphere such as the Andean mountains. In the context of the samples selected for study, the temperature dependences in the areas of similar latitude are related to altitude. Thus, all OC in the highest altitude gradient (18°S) and most compounds in the other two profiles (37°S and 45°S) exhibit higher concentrations with decreasing annual average temperature and thus increase with elevation above sea level. However, theoretical examination of the exponential equation relating OC concentrations to reciprocal of absolute temperatures shows that besides the temperature differences between highest and lowest elevation, the most relevant factor determining the OC concentration gradients is the lowest temperature value of each altitudinal series. That is, the point at highest elevation. |
author2 |
Grimalt, J. O. Borghini, F. Barra, R. SANCHEZ HERNANDEZ, J. C. TORRES GARCIA, C. J. Focardi, SILVANO ETTORE |
format |
Article in Journal/Newspaper |
author |
GRIMALT J. O. BORGHINI F. BARRA R. SANCHEZ HERNANDEZ J. C. TORRES GARCIA C. J. FOCARDI, SILVANO ETTORE |
author_facet |
GRIMALT J. O. BORGHINI F. BARRA R. SANCHEZ HERNANDEZ J. C. TORRES GARCIA C. J. FOCARDI, SILVANO ETTORE |
author_sort |
GRIMALT J. O. |
title |
Temperature dependance of the organochlorine compound distributions in the Andean Lakes |
title_short |
Temperature dependance of the organochlorine compound distributions in the Andean Lakes |
title_full |
Temperature dependance of the organochlorine compound distributions in the Andean Lakes |
title_fullStr |
Temperature dependance of the organochlorine compound distributions in the Andean Lakes |
title_full_unstemmed |
Temperature dependance of the organochlorine compound distributions in the Andean Lakes |
title_sort |
temperature dependance of the organochlorine compound distributions in the andean lakes |
publishDate |
2004 |
url |
http://hdl.handle.net/11365/26303 https://doi.org/10.1021/es040051m |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
info:eu-repo/semantics/altIdentifier/pmid/15543741 info:eu-repo/semantics/altIdentifier/wos/WOS:000224519500024 volume:38 issue:20 firstpage:5386 lastpage:5392 numberofpages:7 journal:ENVIRONMENTAL SCIENCE & TECHNOLOGY http://hdl.handle.net/11365/26303 doi:10.1021/es040051m info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-6044223561 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1021/es040051m |
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Environmental Science & Technology |
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38 |
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20 |
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5386 |
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5392 |
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