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Интеллектуальная Система Тематического Исследования НАукометрических данных |
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Atmospheric N deposition to the coastal area of the Black Sea: sources, intra-annual variations and importance for biogeochemistry and productivity of the surface layerстатья
- Авторы: Varenik A., Konovalov S.
- Сборник: Proceedings of International Conference "Managinag risks to coastal regions and communities in a changinag world (EMECS'11 - SeaCoasts XXVI
- Глава в коллективной монографии
- Год издания: 2016
- Первая страница: 753
- Последняя страница: 761
- DOI: 10.21610/conferencearticle_58b43155bc901
- Аннотация: Atmospheric precipitations can be an important source of nutrients to open and coastal zones of marine ecosystem. Jickells [1] has published that atmospheric depositions can support 5-25% of nitrogen required to primary production. Bulk atmospheric precipitations have been collected in a rural location at the Black Sea Crimean coast - Katsiveli settlement, and an urban location - Sevastopol city. Samples have been analyzed for inorganic fixed nitrogen (IFN) - nitrate, nitrite, and ammonium. Depositions have been calculated at various space and time scales. The monthly volume weighted mean concentration of IFN increases from summer to winter in both locations. A significant local source of IFN has been revealed for the urban location and this source and its spatial influence have been quantified. IFN deposition with atmospheric precipitations is up to 5% of its background content in the upper 10 m layer of water at the north-western shelf of the Black Sea. Considering Redfield C:N ratio (106:16) and the rate of primary production (PP) in coastal areas of the Black Sea of about 100-130 g C m-2 year-1 we have assessed that average atmospheric IFN depositions may intensify primary production by 4.5% for rural locations, but this value is increased many-fold in urban locations due to local IFN sources
- Добавил в систему: Вареник Алла Валерьевна