Normal07.8 磅02falsefalsefalseEN-USZH-CNX-NONEMicrosoftInternetExplorer4Iron fertilisation of primary production by islands in the Southern Ocean, and impacts on the biological carbon pump.
英国南安普敦国家海洋中心
Peter J Statham教授
时间：2010年4月6日（星期二）9:30-11:00
地点：曾呈奎楼B-206
Abstract:
Island systems in the Southern Ocean are oases of enhanced primary productivity in otherwise relatively barren high nutrient low chlorophyll (HNLC) waters. Recent investigations around the Crozet and Kerguelen Islands demonstrate that the release of iron from the islands and associated shallow topography leads to the enhanced productivity seen down stream of the islands. This higher productivity enhances the vertical carbon flux, as measured by both Th-234 and conventional trap systems. Whilst we can see the impact of the iron, we are still a long way from fully understanding the mechanisms involved and sources of Fe. Thus whilst geo-engineering the removal of carbon dioxide from the atmosphere through addition of Fe to HNLC waters has been suggested, there are still significant uncertainties over the overall efficacy of this approach and exactly how the ecosystems would respond.
教授研究专长：海洋生物地球化学
教授研究兴趣：
His Researchrevolves around understanding the role of trace elements as a control on, and as a tracer of, major element cycles in the ocean. Much of this work utilises knowledge of fundamental chemical processes and its application in complex natural marine system. This complexity requires an interdisciplinary approach, including facets of chemistry, physics, geology and biology, that are brought together to provide an holistic and improved understanding of the behaviour of the elemental cycle under study. Ongoing and recent work often involves national and international collaboration and includes:
Role of iron as a regulating element for primary production around islands in the Southern Ocean (Crozet)
Importance of the atmosphere (SOLAS) and sediments as a source of iron and other elements to the ocean.
Geochemistry of hydrothermal plumes, and their role in ocean geochemical cycles
Importance of bacterial processes in recycling of elements in suspended particles to dissolved forms, and in modifying vertical fluxes of elements in the water column (GEOTRACES)
Development of in situ sensors for use with autonomous underwater vehicles to for high resolution studies of trace element biogeochemistry
教授个人主页：http://www.noc.soton.ac.uk/obe/index.php?action=staff_entry&SID=395
