Nutrient release from dry and wet Saharan dust deposition
Dry and wet Saharan dust deposition incubation experiments were conducted in the tropical North Atlantic Ocean at 12°N to study the nutrient release of Saharan dust under oligotrophic seawater conditions with possible fertilization effects on the phytoplankton. Low and high amounts of Saharan dust d...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.898138 2023-05-15T17:37:14+02:00 Nutrient release from dry and wet Saharan dust deposition Korte, Laura F MEDIAN LATITUDE: 12.000000 * MEDIAN LONGITUDE: -30.500000 * SOUTH-BOUND LATITUDE: 12.000000 * WEST-BOUND LONGITUDE: -38.000000 * NORTH-BOUND LATITUDE: 12.000000 * EAST-BOUND LONGITUDE: -23.000000 * DATE/TIME START: 2016-03-29T00:00:00 * DATE/TIME END: 2016-04-03T00:00:00 * MINIMUM DEPTH, water: 20 m * MAXIMUM DEPTH, water: 70 m 2019-02-07 text/tab-separated-values, 1180 data points https://doi.pangaea.de/10.1594/PANGAEA.898138 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.898138 CC-BY-NC-4.0: Creative Commons Attribution-NonCommercial 4.0 International Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY-NC Carbon organic dissolved standard deviation particulate Comment Continuous flow analysis after Stoll et al. (2001) Day of experiment DEPTH water DUSTTRAFFIC IV Event label Experimental treatment Flow cytometry Accuri C6 Flow injection analysis INCUB Incubation Iron James Cook JC134 JC134_M1_incub JC134_M3_incub Nitrate Phosphate Phytoplankton pico eukaryotic Silicate Dataset 2019 ftpangaea 2023-01-20T09:11:59Z Dry and wet Saharan dust deposition incubation experiments were conducted in the tropical North Atlantic Ocean at 12°N to study the nutrient release of Saharan dust under oligotrophic seawater conditions with possible fertilization effects on the phytoplankton. Low and high amounts of Saharan dust deposition from two different dust sources (paleo-lake and sand dune) were used from which the dust's particle sizes were adjusted to resemble dust that is naturally deposited over the ocean at the experiment sites. For wet dust deposition, the dust was pre-leached in acidified 'artificial rainwater' (H2SO4) for 16 to 24 hours, mimicking acid cloud processing at different pH values. Experiments were run up to eight days. Daily nutrient measurements of phosphate (PO43-), silicate (SiO44-), nitrate (NO3-) and cell abundances were performed in addition to measurements of concentrations of total dissolved iron (DFe) and particulate organic carbon (POC) at the start and at the end of the experiments. A significant initial increase and subsequent gradual decrease in PO43-, SiO44- and DFe concentrations were observed after wet dust deposition using high amounts of dust previously leached in low pH rain (H2SO4, pH=2). Remarkably, the experiments showed no nutrient release (PO43-, SiO44- and DFe) from dry-dust addition and the NO3- concentrations remained unaffected in all (dry and wet) experiments. The prokaryotic cyanobacterium Synechococcus spp. was the most prominent picophytoplankton in all mixed layer experiments. After an initial increase in cell abundance, a subsequent decrease in the eastern Atlantic or a slight increase in the middle of the Atlantic was observed for allexperiments, independently of dry- and wet-dust deposition. The POC concentrations at the end of the experiments increased in all treatments and showed similar high values after both dry and wet dust deposition treatments. Even though wet dust deposition is considered to have a higher potential to introduce bioavailable nutrients (i.e. PO43-, SiO44- and ... Dataset North Atlantic PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-38.000000,-23.000000,12.000000,12.000000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Carbon organic dissolved standard deviation particulate Comment Continuous flow analysis after Stoll et al. (2001) Day of experiment DEPTH water DUSTTRAFFIC IV Event label Experimental treatment Flow cytometry Accuri C6 Flow injection analysis INCUB Incubation Iron James Cook JC134 JC134_M1_incub JC134_M3_incub Nitrate Phosphate Phytoplankton pico eukaryotic Silicate |
spellingShingle |
Carbon organic dissolved standard deviation particulate Comment Continuous flow analysis after Stoll et al. (2001) Day of experiment DEPTH water DUSTTRAFFIC IV Event label Experimental treatment Flow cytometry Accuri C6 Flow injection analysis INCUB Incubation Iron James Cook JC134 JC134_M1_incub JC134_M3_incub Nitrate Phosphate Phytoplankton pico eukaryotic Silicate Korte, Laura F Nutrient release from dry and wet Saharan dust deposition |
topic_facet |
Carbon organic dissolved standard deviation particulate Comment Continuous flow analysis after Stoll et al. (2001) Day of experiment DEPTH water DUSTTRAFFIC IV Event label Experimental treatment Flow cytometry Accuri C6 Flow injection analysis INCUB Incubation Iron James Cook JC134 JC134_M1_incub JC134_M3_incub Nitrate Phosphate Phytoplankton pico eukaryotic Silicate |
description |
Dry and wet Saharan dust deposition incubation experiments were conducted in the tropical North Atlantic Ocean at 12°N to study the nutrient release of Saharan dust under oligotrophic seawater conditions with possible fertilization effects on the phytoplankton. Low and high amounts of Saharan dust deposition from two different dust sources (paleo-lake and sand dune) were used from which the dust's particle sizes were adjusted to resemble dust that is naturally deposited over the ocean at the experiment sites. For wet dust deposition, the dust was pre-leached in acidified 'artificial rainwater' (H2SO4) for 16 to 24 hours, mimicking acid cloud processing at different pH values. Experiments were run up to eight days. Daily nutrient measurements of phosphate (PO43-), silicate (SiO44-), nitrate (NO3-) and cell abundances were performed in addition to measurements of concentrations of total dissolved iron (DFe) and particulate organic carbon (POC) at the start and at the end of the experiments. A significant initial increase and subsequent gradual decrease in PO43-, SiO44- and DFe concentrations were observed after wet dust deposition using high amounts of dust previously leached in low pH rain (H2SO4, pH=2). Remarkably, the experiments showed no nutrient release (PO43-, SiO44- and DFe) from dry-dust addition and the NO3- concentrations remained unaffected in all (dry and wet) experiments. The prokaryotic cyanobacterium Synechococcus spp. was the most prominent picophytoplankton in all mixed layer experiments. After an initial increase in cell abundance, a subsequent decrease in the eastern Atlantic or a slight increase in the middle of the Atlantic was observed for allexperiments, independently of dry- and wet-dust deposition. The POC concentrations at the end of the experiments increased in all treatments and showed similar high values after both dry and wet dust deposition treatments. Even though wet dust deposition is considered to have a higher potential to introduce bioavailable nutrients (i.e. PO43-, SiO44- and ... |
format |
Dataset |
author |
Korte, Laura F |
author_facet |
Korte, Laura F |
author_sort |
Korte, Laura F |
title |
Nutrient release from dry and wet Saharan dust deposition |
title_short |
Nutrient release from dry and wet Saharan dust deposition |
title_full |
Nutrient release from dry and wet Saharan dust deposition |
title_fullStr |
Nutrient release from dry and wet Saharan dust deposition |
title_full_unstemmed |
Nutrient release from dry and wet Saharan dust deposition |
title_sort |
nutrient release from dry and wet saharan dust deposition |
publisher |
PANGAEA |
publishDate |
2019 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.898138 |
op_coverage |
MEDIAN LATITUDE: 12.000000 * MEDIAN LONGITUDE: -30.500000 * SOUTH-BOUND LATITUDE: 12.000000 * WEST-BOUND LONGITUDE: -38.000000 * NORTH-BOUND LATITUDE: 12.000000 * EAST-BOUND LONGITUDE: -23.000000 * DATE/TIME START: 2016-03-29T00:00:00 * DATE/TIME END: 2016-04-03T00:00:00 * MINIMUM DEPTH, water: 20 m * MAXIMUM DEPTH, water: 70 m |
long_lat |
ENVELOPE(-38.000000,-23.000000,12.000000,12.000000) |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.898138 |
op_rights |
CC-BY-NC-4.0: Creative Commons Attribution-NonCommercial 4.0 International Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY-NC |
_version_ |
1766137046628302848 |