時 間：10月28日（星期五）10:00-11:00
主 講：Toste Tanhua
地 點：周隆泉樓A3-206報告廳
受蔡明剛教授邀請，德國基爾亥姆霍茲海洋研究中心（GEOMAR, Helmholtz Center for Ocean Research Kiel) Toste Tanhua高級研究員將于10月26號來廈門交流訪問，并做學術報告，詳情如下：
報告題目：Observing the Oceans for climate and ocean health, why transient tracers matters
報告人： Toste Tanhua（GEOMAR, Helmholtz Center for Ocean Research Kiel)
報告地點：周隆泉樓A3-206報告廳
報告時間：10月28日（星期五）10:00-11:00
報告結束后，蔡老師也邀請有興趣的老師留下來參加討論和座談，地點在周隆泉樓B3-201，時間為11:00-12:00.
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個人簡歷:
Toste Tanhua，德國基爾亥姆霍茲基爾海洋研究中心，高級研究員/GEOMAR, Helmholtz Centre for Ocean Research Kiel, Germany, Senior Scientist。 GEOMAR是國際上在海洋科學研究領域處于領先的研究所之一，其重點關注海底、大洋和大洋邊緣的化學，物理，生物以及地質過程及其同大氣的相互作用。Dr. Toste Tanhua領導的瞬態示蹤研究組（Workgroup: Transient Tracers）是世界上開展瞬態示蹤物的研究較早的驗室之一，在諸如CFC-12和SF6等海洋瞬態示蹤物的測定技術方面具于領先水平。GEOMAR擁有長期、豐富的海上現場工作和科學研究經驗，在利用多種瞬態示蹤物開展海洋水團平均年齡的估算、人為碳濃度估算、海洋通風和混合過程等海洋科學研究等領域方面獲得了豐富的成果。此外，也開展了釋放示蹤物實驗研究，從而獲得示蹤物大范圍運輸的水平、垂直混合速率。
報告摘要：
Transient tracers are a group of (chemical) compounds that can be used in the ocean to quantify ventilation, transit time distribution and transport time-scales. These compounds are all conservative in sea-water, or have well-defined decay-functions, and a well-established source function over time at the ocean surface. Measurement of transient tracers in the interior ocean thus provides information on the time-scales since the ocean was ventilated, i.e. in contact with the atmosphere. Knowledge of the transit time distribution (TTD) of a water-mass allows for inference of the concentrations or fates of other transient compounds, such as anthropogenic carbon or nitrous oxide. Commonly measured transient tracers are the chlorofluorocarbons (CFCs) 11 and 12, although in the past also CFC-113 and CCl4 have been measured. More recently also the related compound sulphur hexafluoride (SF6) is regularly measured since it provides information on ventilation of the fast ventilated parts of the ocean. Knowledge about ventilation is key to quantify the transport of (climate) perturbations from the surface to interior ocean. For instance, the ocean is storing about 95% of anthropogenic global warming (heat content) and about 30% of anthropogenic carbon. A system of global sustained observations of interior ocean transient tracer observations is an important component of the global climate observing system.
Here I will present some basic concepts of transient tracers, and put that in a global context with focus on societal benefits.
