Atmospheric nutrient inputs to the northern levantine basin from a long-term observation: sources and comparison with riverine inputs
Aerosol and rainwater samples have been collected at a rural site located on the coastline of the Eastern Mediterranean, Erdemli, Turkey between January 1999 and December 2007. Riverine sampling was carried out at five Rivers (Ceyhan, Seyhan, Göksu, Berdan and Lamas) draining into the Northeastern L...
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Series: | Biogeosciences |
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doaj-09e558873bc34bab99b919c956d217582020-11-24T23:26:37ZengCopernicus PublicationsBiogeosciences1726-41701726-41892010-12-017124037405010.5194/bg-7-4037-2010Atmospheric nutrient inputs to the northern levantine basin from a long-term observation: sources and comparison with riverine inputsM. KoçakN. KubilayS. TuğrulN. MihalopoulosAerosol and rainwater samples have been collected at a rural site located on the coastline of the Eastern Mediterranean, Erdemli, Turkey between January 1999 and December 2007. Riverine sampling was carried out at five Rivers (Ceyhan, Seyhan, Göksu, Berdan and Lamas) draining into the Northeastern Levantine Basin (NLB) between March 2002 and July 2007. Samples have been analyzed for macronutrients of phosphate, silicate, nitrate and ammonium (PO<sub>4</sub><sup>3&minus;</sup>, Si<sub>diss</sub>, NO<sub>3</sub><sup>&minus;</sup> and NH<sub>4</sub><sup>+</sup>). Phosphate and silicate in aerosol and rainwater showed higher and larger variations during the transitional period when air flows predominantly originate from North Africa and Middle East/Arabian Peninsula. Deficiency of alkaline material have been found to be the main reason of the acidic rain events whilst high pH values (>7) have been associated with high Si<sub>diss</sub> concentrations due to sporadic dust events. In general, lowest nitrate and ammonium concentrations in aerosol and rainwater have been associated with air flow from the Mediterranean Sea. Comparison of atmospheric with riverine fluxes demonstrated that DIN and PO<sub>4</sub><sup>3&minus;</sup> fluxes to NLB have been dominated by atmosphere (~90% and ~60% respectively) whereas the input of Si was mainly derived from riverine runoff (~90%). N/P ratios in the atmospheric deposition (233); riverine discharge (28) revealed that NLB receives excessive amounts of DIN and this unbalanced P and N inputs may provoke even more phosphorus deficiency. Observed molar Si/N ratio suggested Si limitation relative to nitrogen might cause a switch from diatom dominated communities to non-siliceous populations particularly at coastal NLB. http://www.biogeosciences.net/7/4037/2010/bg-7-4037-2010.pdf |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
M. Koçak N. Kubilay S. Tuğrul N. Mihalopoulos |
spellingShingle |
M. Koçak N. Kubilay S. Tuğrul N. Mihalopoulos Atmospheric nutrient inputs to the northern levantine basin from a long-term observation: sources and comparison with riverine inputs Biogeosciences |
author_facet |
M. Koçak N. Kubilay S. Tuğrul N. Mihalopoulos |
author_sort |
M. Koçak |
title |
Atmospheric nutrient inputs to the northern levantine basin from a long-term observation: sources and comparison with riverine inputs |
title_short |
Atmospheric nutrient inputs to the northern levantine basin from a long-term observation: sources and comparison with riverine inputs |
title_full |
Atmospheric nutrient inputs to the northern levantine basin from a long-term observation: sources and comparison with riverine inputs |
title_fullStr |
Atmospheric nutrient inputs to the northern levantine basin from a long-term observation: sources and comparison with riverine inputs |
title_full_unstemmed |
Atmospheric nutrient inputs to the northern levantine basin from a long-term observation: sources and comparison with riverine inputs |
title_sort |
atmospheric nutrient inputs to the northern levantine basin from a long-term observation: sources and comparison with riverine inputs |
publisher |
Copernicus Publications |
series |
Biogeosciences |
issn |
1726-4170 1726-4189 |
publishDate |
2010-12-01 |
description |
Aerosol and rainwater samples have been collected at a rural site located on the coastline of the Eastern Mediterranean, Erdemli, Turkey between January 1999 and December 2007. Riverine sampling was carried out at five Rivers (Ceyhan, Seyhan, Göksu, Berdan and Lamas) draining into the Northeastern Levantine Basin (NLB) between March 2002 and July 2007. Samples have been analyzed for macronutrients of phosphate, silicate, nitrate and ammonium (PO<sub>4</sub><sup>3&minus;</sup>, Si<sub>diss</sub>, NO<sub>3</sub><sup>&minus;</sup> and NH<sub>4</sub><sup>+</sup>). Phosphate and silicate in aerosol and rainwater showed higher and larger variations during the transitional period when air flows predominantly originate from North Africa and Middle East/Arabian Peninsula. Deficiency of alkaline material have been found to be the main reason of the acidic rain events whilst high pH values (>7) have been associated with high Si<sub>diss</sub> concentrations due to sporadic dust events. In general, lowest nitrate and ammonium concentrations in aerosol and rainwater have been associated with air flow from the Mediterranean Sea. Comparison of atmospheric with riverine fluxes demonstrated that DIN and PO<sub>4</sub><sup>3&minus;</sup> fluxes to NLB have been dominated by atmosphere (~90% and ~60% respectively) whereas the input of Si was mainly derived from riverine runoff (~90%). N/P ratios in the atmospheric deposition (233); riverine discharge (28) revealed that NLB receives excessive amounts of DIN and this unbalanced P and N inputs may provoke even more phosphorus deficiency. Observed molar Si/N ratio suggested Si limitation relative to nitrogen might cause a switch from diatom dominated communities to non-siliceous populations particularly at coastal NLB. |
url |
http://www.biogeosciences.net/7/4037/2010/bg-7-4037-2010.pdf |
work_keys_str_mv |
AT mkocak atmosphericnutrientinputstothenorthernlevantinebasinfromalongtermobservationsourcesandcomparisonwithriverineinputs AT nkubilay atmosphericnutrientinputstothenorthernlevantinebasinfromalongtermobservationsourcesandcomparisonwithriverineinputs AT stugrul atmosphericnutrientinputstothenorthernlevantinebasinfromalongtermobservationsourcesandcomparisonwithriverineinputs AT nmihalopoulos atmosphericnutrientinputstothenorthernlevantinebasinfromalongtermobservationsourcesandcomparisonwithriverineinputs |
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1725554192017260544 |