Seasonal and tidal influence on the variability of nitrous oxide in the Tagus estuary, Portugal
作者： Célia Gonçalves , Maria José Brogueira , Maria Filomena Camões
DOI: 10.3989/SCIMAR.2010.74S1057
关键词: Estuary 、 Nitrification 、 Eutrophication 、 Discharge 、 Water column 、 Salinity 、 Atmosphere 、 Environmental science 、 Nitrate 、 Oceanography
摘要: In order to evaluate seasonal and tidal influence on the variability of dissolved nitrous oxide (N 2 O) in Tagus estuary, Portugal, water sampling was carried out along salinity gradient (May November 2006) during several cycles (February April 2007) at a fixed site. N O other relevant environmental parameters, temperature, salinity, oxygen inorganic nitrogen forms (nitrate, nitrite ammonium) were measured. Dissolved concentrations showed strong variability, with highest values occurring February 2007 (13.7 nM, spring tide) 2006 (18.4 upper estuary), apparently related major river discharge. The existence sources noticed middle estuary. During tide, input from external may be augmented by column nitrification, making this process contributor enhancement concentration Estimated air-sea fluxes atmosphere reached maximum value ~10.4 μmol m -2 d -1 tide May lower (left bank) Although estuary behaves predominantly as source atmospheric O, it appears weaker than other, more eutrophic estuaries.
unirioja.es
core.ac.uk
sci-hub.st 参考文章(25)
Richard N. Cooper, J. T. Houghton, James J. McCarthy, Bert Metz, Climate Change 2001: The Scientific Basis Foreign Affairs. ,vol. 81, pp. 208- ,(2002) , 10.2307/20033020
G. A. F. Ritchie, D. J. D. Nicholas, Identification of the sources of nitrous oxide produced by oxidative and reductive processes in Nitrosomonas europaea. Biochemical Journal. ,vol. 126, pp. 1181- 1191 ,(1972) , 10.1042/BJ1261181
Hermann W. Bange, Nitrous oxide and methane in European coastal waters Estuarine Coastal and Shelf Science. ,vol. 70, pp. 361- 374 ,(2006) , 10.1016/J.ECSS.2006.05.042
Gabriele Stehr, Barbara Böttcher, Petra Dittberner, Gabriele Rath, Hans-Peter Koops, The ammonia-oxidizing nitrifying population of the River Elbe estuary FEMS Microbiology Ecology. ,vol. 17, pp. 177- 186 ,(1995) , 10.1111/J.1574-6941.1995.TB00141.X
W. S. Broecker, T.-H. Peng, Gas exchange rates between air and sea Tellus A. ,vol. 26, pp. 21- 35 ,(1974) , 10.3402/TELLUSA.V26I1-2.9733
L.A Codispoti, J.P Christensen, Nitrification, denitrification and nitrous oxide cycling in the eastern tropical South Pacific ocean Marine Chemistry. ,vol. 16, pp. 277- 300 ,(1985) , 10.1016/0304-4203(85)90051-9
MT Cabrita, V Brotas, Seasonal variation in denitrification and dissolved nitrogen fluxes in intertidal sediments of the Tagus estuary, Portugal Marine Ecology Progress Series. ,vol. 202, pp. 51- 65 ,(2000) , 10.3354/MEPS202051
CARL J. LORENZEN, DETERMINATION OF CHLOROPHYLL AND PHEO‐PIGMENTS: SPECTROPHOTOMETRIC EQUATIONS1 Limnology and Oceanography. ,vol. 12, pp. 343- 346 ,(1967) , 10.4319/LO.1967.12.2.0343
AndréB Fortunato, Anabela Oliveira, António M Baptista, On the effect of tidal flats on the hydrodynamics of the Tagus estuary Oceanologica Acta. ,vol. 22, pp. 31- 44 ,(1999) , 10.1016/S0399-1784(99)80030-9
Natacha Brion, Gilles Billen, Loïc Guézennec, André Ficht, Loic Guezennec, Andre Ficht, Distribution of nitrifying activity in the Seine River (France) from Paris to the estuary. Estuaries. ,vol. 23, pp. 669- 682 ,(2000) , 10.2307/1352893