Nitrogen and Phosphorus Budgets in the Northwestern Mediterranean Deep Convection Region. Kessouri, F., Ulses, C., Estournel, C., Marsaleix, P., Severin, T., Pujo‐Pay, M., Caparros, J., Raimbault, P., Fommervault, O. P. d., D'Ortenzio, F., Taillandier, V., Testor, P., & Conan, P. 122(12):9429–9454. Number: 12
Nitrogen and Phosphorus Budgets in the Northwestern Mediterranean Deep Convection Region [link]Paper  doi  abstract   bibtex   
The aim of this study is to understand the biogeochemical cycles of the northwestern Mediterranean Sea (NW Med), where a recurrent spring bloom related to dense water formation occurs. We used a coupled physical-biogeochemical model at high resolution to simulate realistic 1 year period and analyze the nitrogen (N) and phosphorus (P) cycles. First, the model was evaluated using cruises carried out in winter, spring, and summer and a Bio-Argo float deployed in spring. Then, the annual cycle of meteorological and hydrodynamical forcing and nutrients stocks in the upper layer were analyzed. Third, the effect of biogeochemical and physical processes on N and P was quantified. Fourth, we quantified the effects of the physical and biological processes on the seasonal changes of the molar NO3:PO4 ratio, particularly high compared to the global ocean. The deep convection reduced the NO3:PO4 ratio of upper waters, but consumption by phytoplankton increased it. Finally, N and P budgets were estimated. At the annual scale, this area constituted a sink of inorganic and a source of organic N and P for the peripheral area. NO3 and PO4 were horizontally advected from the peripheral regions into the intermediate waters (130–800 m) of the deep convection area, while organic matter was exported throughout the whole water column toward the surrounding areas. The annual budget suggests that the NW Med deep convection constitutes a major source of nutrients for the photic zone of the Mediterranean Sea.
@article{kessouri_nitrogen_2017,
	title = {Nitrogen and Phosphorus Budgets in the Northwestern Mediterranean Deep Convection Region},
	volume = {122},
	rights = {© 2017. American Geophysical Union. All Rights Reserved.},
	issn = {2169-9291},
	url = {https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1002/2016JC012665},
	doi = {10.1002/2016JC012665},
	abstract = {The aim of this study is to understand the biogeochemical cycles of the northwestern Mediterranean Sea ({NW} Med), where a recurrent spring bloom related to dense water formation occurs. We used a coupled physical-biogeochemical model at high resolution to simulate realistic 1 year period and analyze the nitrogen (N) and phosphorus (P) cycles. First, the model was evaluated using cruises carried out in winter, spring, and summer and a Bio-Argo float deployed in spring. Then, the annual cycle of meteorological and hydrodynamical forcing and nutrients stocks in the upper layer were analyzed. Third, the effect of biogeochemical and physical processes on N and P was quantified. Fourth, we quantified the effects of the physical and biological processes on the seasonal changes of the molar {NO}3:{PO}4 ratio, particularly high compared to the global ocean. The deep convection reduced the {NO}3:{PO}4 ratio of upper waters, but consumption by phytoplankton increased it. Finally, N and P budgets were estimated. At the annual scale, this area constituted a sink of inorganic and a source of organic N and P for the peripheral area. {NO}3 and {PO}4 were horizontally advected from the peripheral regions into the intermediate waters (130–800 m) of the deep convection area, while organic matter was exported throughout the whole water column toward the surrounding areas. The annual budget suggests that the {NW} Med deep convection constitutes a major source of nutrients for the photic zone of the Mediterranean Sea.},
	pages = {9429--9454},
	number = {12},
	journaltitle = {Journal of Geophysical Research: Oceans},
	author = {Kessouri, Faycal and Ulses, Caroline and Estournel, Claude and Marsaleix, Patrick and Severin, Tatiana and Pujo‐Pay, Mireille and Caparros, Jocelyne and Raimbault, Patrick and Fommervault, Orens Pasqueron de and D'Ortenzio, Fabrizio and Taillandier, Vincent and Testor, Pierre and Conan, Pascal},
	urldate = {2019-04-15},
	date = {2017},
	langid = {english},
	note = {Number: 12},
	keywords = {Mediterranean Sea, N:P stoichiometry, nitrate and phosphate budget, nutrient seasonal dynamics, physical-biogeochemical modeling}
}
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