Aeolian transport and deposition of plant wax n-alkanes across the tropical North Atlantic Ocean
Long chain n-alkanes are terrestrial higher plant biomarkers analysed in marine sedimentary archives to reconstruct continental palaeoclimatic and palaeohydrological conditions. Latitudinal variation in their concentration and distribution in marine sediments relatively close to the continent has be...
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ftunivutrecht:oai:dspace.library.uu.nl:1874/376768 2023-11-12T04:22:01+01:00 Aeolian transport and deposition of plant wax n-alkanes across the tropical North Atlantic Ocean Schreuder, Laura T. Stuut, Jan Berend W. Korte, Laura F. Sinninghe Damsté, Jaap S. Schouten, Stefan Organic geochemistry non-UU output of UU-AW members 2018-01 image/pdf https://dspace.library.uu.nl/handle/1874/376768 en eng 0146-6380 https://dspace.library.uu.nl/handle/1874/376768 info:eu-repo/semantics/OpenAccess Higher plant biomarkers Long chain n-alkanes Saharan dust Tropical North Atlantic Ocean Geochemistry and Petrology Article 2018 ftunivutrecht 2023-11-01T23:19:49Z Long chain n-alkanes are terrestrial higher plant biomarkers analysed in marine sedimentary archives to reconstruct continental palaeoclimatic and palaeohydrological conditions. Latitudinal variation in their concentration and distribution in marine sediments relatively close to the continent has been widely studied, but little is known on the extent to which this continental signal extends to the ocean. Furthermore, no studies have examined the seasonal variation in the deposition of these biomarkers in marine sediments. Here we studied longitudinal variation in the composition of long chain n-alkanes and two other terrestrial higher plant biomarkers (long chain n-alkanols and long chain fatty acids) in atmospheric particles, as well as longitudinal and seasonal variation in long chain n-alkanes in sinking particles in the ocean at different water depths and in surface sediments, all collected along a 12°N transect across the tropical North Atlantic Ocean. The highest abundance of all three biomarker classes was closest to the African coast, as expected, because they are transported with Saharan dust and the largest part of the dust is deposited close to the source. At this proximal location, the seasonal variability in long chain n-alkane flux and the chain length distribution of the n-alkanes in sinking particles was most pronounced, due to seasonal change in the dust source or to change in vegetation composition in the source area, related to the position of the Intertropical Convergence Zone (ITCZ). In contrast, in the open ocean the seasonal variability in both the long chain n-alkane flux and chain length distribution of the n-alkanes was low. The abundance of the alkanes was also lower, as expected because of the larger source-to-sink distance. At the western part of the transect, close to South America, we found an additional source of the alkanes in the sinking particles during spring and autumn in the year 2013. The δ13C values of the alkanes in the surface sediment closest to the South American ... Article in Journal/Newspaper North Atlantic Utrecht University Repository |
institution |
Open Polar |
collection |
Utrecht University Repository |
op_collection_id |
ftunivutrecht |
language |
English |
topic |
Higher plant biomarkers Long chain n-alkanes Saharan dust Tropical North Atlantic Ocean Geochemistry and Petrology |
spellingShingle |
Higher plant biomarkers Long chain n-alkanes Saharan dust Tropical North Atlantic Ocean Geochemistry and Petrology Schreuder, Laura T. Stuut, Jan Berend W. Korte, Laura F. Sinninghe Damsté, Jaap S. Schouten, Stefan Aeolian transport and deposition of plant wax n-alkanes across the tropical North Atlantic Ocean |
topic_facet |
Higher plant biomarkers Long chain n-alkanes Saharan dust Tropical North Atlantic Ocean Geochemistry and Petrology |
description |
Long chain n-alkanes are terrestrial higher plant biomarkers analysed in marine sedimentary archives to reconstruct continental palaeoclimatic and palaeohydrological conditions. Latitudinal variation in their concentration and distribution in marine sediments relatively close to the continent has been widely studied, but little is known on the extent to which this continental signal extends to the ocean. Furthermore, no studies have examined the seasonal variation in the deposition of these biomarkers in marine sediments. Here we studied longitudinal variation in the composition of long chain n-alkanes and two other terrestrial higher plant biomarkers (long chain n-alkanols and long chain fatty acids) in atmospheric particles, as well as longitudinal and seasonal variation in long chain n-alkanes in sinking particles in the ocean at different water depths and in surface sediments, all collected along a 12°N transect across the tropical North Atlantic Ocean. The highest abundance of all three biomarker classes was closest to the African coast, as expected, because they are transported with Saharan dust and the largest part of the dust is deposited close to the source. At this proximal location, the seasonal variability in long chain n-alkane flux and the chain length distribution of the n-alkanes in sinking particles was most pronounced, due to seasonal change in the dust source or to change in vegetation composition in the source area, related to the position of the Intertropical Convergence Zone (ITCZ). In contrast, in the open ocean the seasonal variability in both the long chain n-alkane flux and chain length distribution of the n-alkanes was low. The abundance of the alkanes was also lower, as expected because of the larger source-to-sink distance. At the western part of the transect, close to South America, we found an additional source of the alkanes in the sinking particles during spring and autumn in the year 2013. The δ13C values of the alkanes in the surface sediment closest to the South American ... |
author2 |
Organic geochemistry non-UU output of UU-AW members |
format |
Article in Journal/Newspaper |
author |
Schreuder, Laura T. Stuut, Jan Berend W. Korte, Laura F. Sinninghe Damsté, Jaap S. Schouten, Stefan |
author_facet |
Schreuder, Laura T. Stuut, Jan Berend W. Korte, Laura F. Sinninghe Damsté, Jaap S. Schouten, Stefan |
author_sort |
Schreuder, Laura T. |
title |
Aeolian transport and deposition of plant wax n-alkanes across the tropical North Atlantic Ocean |
title_short |
Aeolian transport and deposition of plant wax n-alkanes across the tropical North Atlantic Ocean |
title_full |
Aeolian transport and deposition of plant wax n-alkanes across the tropical North Atlantic Ocean |
title_fullStr |
Aeolian transport and deposition of plant wax n-alkanes across the tropical North Atlantic Ocean |
title_full_unstemmed |
Aeolian transport and deposition of plant wax n-alkanes across the tropical North Atlantic Ocean |
title_sort |
aeolian transport and deposition of plant wax n-alkanes across the tropical north atlantic ocean |
publishDate |
2018 |
url |
https://dspace.library.uu.nl/handle/1874/376768 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
0146-6380 https://dspace.library.uu.nl/handle/1874/376768 |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782337189260034048 |