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Atmospheric water-soluble organic nitrogen (WSON) over marine environments: a global perspective
- Source :
- Biogeosciences (1726-4170) (Copernicus Gesellschaft Mbh), 2015, Vol. 12, N. 10, P. 3131-3140, Biogeosciences, Vol 12, Iss 10, Pp 3131-3140 (2015), Biogeosciences, Biogeosciences, 2015, 12 (10), pp.3131-3140. ⟨10.5194/bg-12-3131-2015⟩, Biogeosciences, European Geosciences Union, 2015, 12 (10), pp.3131-3140. ⟨10.5194/bg-12-3131-2015⟩
- Publication Year :
- 2015
- Publisher :
- Copernicus Gesellschaft Mbh, 2015.
-
Abstract
- To obtain a comprehensive picture on the spatial distribution of water soluble organic nitrogen (WSON) in marine aerosols, samples were collected during research cruises in the tropical and south Atlantic Ocean and during a one year period (2005) over the southern Indian Ocean (Amsterdam island). Samples have been analyzed for both organic and inorganic forms of nitrogen and the factors controlling their levels have been examined. Fine mode WSON was found to play a significant role in the remote marine atmosphere with enhanced biogenic activity, with concentrations of WSON (11.3 ± 3.3 nmol N m–3) accounting for about 84% of the total dissolved nitrogen (TDN). Such levels are similar to those observed in the polluted marine atmosphere of the eastern Mediterranean (11.6 ± 14.0 nmol N m–3). Anthropogenic activities were found to be an important source of atmospheric WSON as evidenced by the ten times higher levels in the Northern Hemisphere (NH) than in the remote Southern Hemisphere (SH). Furthermore, the higher contribution of WSON to TDN (40%) in the SH, compared to the NH (20%), underlines the important role of organic nitrogen in remote marine areas. Finally, Sahara dust was also identified as a significant source of WSON in the coarse mode aerosols of the NH.
- Subjects :
- 010504 meteorology & atmospheric sciences
lcsh:Life
chemistry.chemical_element
010501 environmental sciences
Spatial distribution
01 natural sciences
Atmosphere
lcsh:QH540-549.5
14. Life underwater
[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces, environment
Southern Hemisphere
Ecology, Evolution, Behavior and Systematics
0105 earth and related environmental sciences
Earth-Surface Processes
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere
Atmospheric water
lcsh:QE1-996.5
Northern Hemisphere
Nitrogen
lcsh:Geology
Indian ocean
Eastern mediterranean
lcsh:QH501-531
Oceanography
chemistry
13. Climate action
Environmental chemistry
Environmental science
lcsh:Ecology
Subjects
Details
- Language :
- English
- ISSN :
- 17264170 and 17264189
- Database :
- OpenAIRE
- Journal :
- Biogeosciences (1726-4170) (Copernicus Gesellschaft Mbh), 2015, Vol. 12, N. 10, P. 3131-3140, Biogeosciences, Vol 12, Iss 10, Pp 3131-3140 (2015), Biogeosciences, Biogeosciences, 2015, 12 (10), pp.3131-3140. ⟨10.5194/bg-12-3131-2015⟩, Biogeosciences, European Geosciences Union, 2015, 12 (10), pp.3131-3140. ⟨10.5194/bg-12-3131-2015⟩
- Accession number :
- edsair.doi.dedup.....69576d8e5ba0b18b698f00fb0e6ea557