DIFMET · Diffusive trace metals in Arctic Ocean surface waters
6РП — Действия „Мария Кюри“
- Период
- 2006-01-01 → 2007-12-31
- Финансиране от ЕС
- 159 614 €
- Участници
- 1
- Схема
- EIF
Линиите свързват координатора с партньорите. За проекти отпреди 2014 г. CORDIS не винаги дава точни координати. Тези точки са на ниво град или държава.
Накратко на български
Взаимодействието между морската вода и утайките в плитките части на Северния ледови океан променя концентрацията на редки земни елементи. Тези елементи помагат за проследяване на океанските течения в настоящето и в миналото.
Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.
Резултати накратко
Final Activity Report Summary - DIFMET (Diffusive trace metals in Arctic Ocean surface waters)
The project sought to determine the effects of interaction between seawater flowing into the Arctic Ocean and the sediments of the extensive shallow continental shelves that are crossed. Samples of water and sediments from the Bering Sea were collected during an oceanographic cruise on board the Swedish Icebreaker Oden. The study focussed on the rare earth elements, key indicators widely used in chemical oceanography because earlier data suggested that the shelves would have a strong effect in modifying these trace elements. The work demonstrated that the trace element characteristics of water originating in the Pacific Ocean are substantially changed, with the rare earth element concentrations greatly increased. A significant factor is the suspension of very fine material that remains suspended and is susceptible to being dissolved. This Pacific Ocean water subsequently spreads through much of the Arctic Ocean, and the rare earth elements, in particular Nd, are used to trace the ocean circulation of these waters at present as well as in the past (when the Nd in the water column has been preserved in sediments).
Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз
Цел на проекта
Primary production in the ocean depend upon availability of the major nutrients carbon, nitrogen, phosphorus, and silicon. However, a number of essential micronutrients (e.g. Fe, Mo, Co, Ni, Cu, Zn, and Cd) with atomic mass >50 may also control growth of phytoplankton. Therefore, bioavailability and speciation for trace metal is important to study. Determination of chemical forms (species) in which bio-available micronutrients are present in seawater is a challenge for chemical oceanographers. A suitabl e tool for approximation of the bioavailable amount of trace metals in natural waters is the technique of Diffusive Gradients in Thin films (DGT). The method is a true in situ sampling technique for quantification and speciation of diffusible metals in the sub-micro size range. The major focus of the proposed project will be on speciation of trace metals in surface waters along the Siberian shelf in the Arctic Ocean, using DGT and other techniques. As of yet there are no published data using DGT from the hi gh Arctic, and the Arctic Ocean provides and ideal study area for DGT because of the well confined sources for trace metal input through the Russian rivers. This interdisciplinary project will contribute to our understanding of how inorganic marine compone nts are linked to biochemical processes. Such information may be invaluable for future studies in a key region for global climate regulation, where a rapid and pronounced climatic warming has been predicted within the next 100 years.
Оригинален текст от CORDIS (на английски).
Участници
- THE CHANCELLORS, MASTERS, AND SCHOLARS OF THE UNIVERSITY OF OXFORD · OXFORDКоординаторНиво градОбединеното кралство
Връзки
Данни: CORDIS, © Европейски съюз