Collaborative International Research in the Ross Sea

拟议的请求是为了支助参加意大利2001年1月至2月前往南极洲罗斯海的一次航行。 这艘机会之船的游轮邀请是在春末收到的，因此太晚了，无法通过正常的资助渠道申请资金。 这是一次物理-生物-地质联合巡航，将对罗斯海的各种环境进行采样（例如，大陆架断裂的阿代尔角、罗斯海冰架、特拉诺瓦湾附近的沿海沃茨和罗斯海中部）。 拟议的研究将集中在两个科学主题：浮游植物光合作用的聚集体形成和铁限制。 聚合物形成和通量的过程，有机物通量中的介体将使用照相技术来确定。 在各种环境中的光合作用的依赖性将在罗斯海进行评估的一种新的荧光方法。 这些光合作用/辐照度关系的近实时估计是铁限制的敏感指标。 这一请求是对最近邀请参加的回应，并提供了一个利用新技术对罗斯海进行采样的独特机会。 所提供的研究机会建立在南大洋最近的成果基础上，并扩大了国际合作努力。 在过去，与意大利调查人员在罗斯海的科学协调一直是断断续续的，有点试探性。 这种合作（即，提供铺位空间和科学合作）是在扩大国际活动协调方面迈出的一大步。 这也是利用2000- 2001年在罗斯海进行科学研究的唯一船只的机会。 PI提供的数据将采用两种相对较新的技术来研究铁限制和聚集体形成的问题。 拟议的工作将提供第一次机会，在评估铁限制方面实地测试一种新的和潜在的开创性仪器，并将这种专业知识带到美国南极计划中。

The proposed request ito support participation in an Italian cruise to the Ross Sea, Antarctica in January-February, 2001. The cruise invitation for this ship of opportunity was received in late spring, and hence was too late to request funding via normal funding venues. It is a joint physical-biological-geological cruise that will sample a broad range of environments in the Ross Sea (e.g., the continental shelf break off Cape Adare, the Ross Sea ice shelf, the coastal waters near Terra Nova Bay, and the central Ross Sea). The proposed research will focus on two scientific topics: aggregate formation and iron limitation of phytoplankton photosynthesis. The process of aggregate formation and flux, a mediator in the flux of organic matter will be determined using a photographic technique. The dependence of photosynthesis in a variety of environments will be assessed in the Ross Sea by a novel fluorometric method. These near real-time estimates of photosynthesis/irradiance relationships are sensitive indicators of iron limitation. This request is in response to a recent invitation to participate and provides a unique opportunity to sample the Ross Sea with novel techniques. The research opportunity made available builds on recent results from the southern Ocean and extends international collaborative efforts. In the past, scientific coordination with Italian investigators in the Ross Sea has been spotty and somewhat tentative. This collaboration (i.e., the offering of bunk space and scientific collaboration) is a big move forward in expanding the coordination of international activities. This is also an opportunity to utilize the only ship available for scientific research in the Ross Sea in 2000-01. The data provided by the PI will employ two relatively new techniques to look at questions of iron limitation and aggregate formation. The proposed work will provide the first opportunity to field test a novel and potentially ground-breaking instrument in the assessment of iron limitation and bring that expertise to the US Antarctic Program.