SGER: Science-of-Opportunity Aboard Icebreaker Oden: Ocean-Atmosphere-Ice Interactions and Changes

AbstractThe project goals is to investigate the ocean-aerosol-ice（OAI）interaction in the Amundsen and Ross Seas during the soustral summer of 2007-08 using hydrogeographical measurements（CTD and XBT）in connection with（1）ship-based observations and satellite derived estimates of sea ice concentration，and（2）ship-based observations and reanalysis of meteorological variables.主要科学目标如下：（1）在前一个冬春季节冰-大气变化的范围内，并与有数据的其他年份相比较，研究阿蒙森海沿着三个断面和罗斯海两个断面的上层海洋特征;（2）确定是否有更多的证据表明温暖的绕极深水上升流到阿蒙森海的大陆架上，和/或或罗斯海的淡水化增加，正如以前在这些地区进行的有限的海洋调查所推断的那样;（3）考察海洋热结构沿着航迹的空间变异性（样带以外）提供更大的区域背景，并与Oden 2006-07期间收集的海洋XBT数据进行比较。阿蒙森海和罗斯海之间的重复温度调查特别有价值，因为这一部门是高纬度OAI对ENSO反应的区域中心，从而为检查和联系区域海洋时间变化与全球气候变化提供了机会。这项研究将提高我们对高纬度OAI对气候变化的响应的理解，并为我们的同事所观察到的生物学和地球化学提供物理背景。 我们的研究结果将通过研究出版物和互联网数据库以及拉蒙特-多尔蒂地球观测站的强大公共宣传工作广泛传播。 宣传工作将有助于提高人们对高度敏感的南极地区人为气候变化、冰层融化和生态系统改变的认识和理解。

AbstractThe project goal is to investigate the ocean-atmosphere-ice (OAI) interactions in the Amundsen and Ross Seas during the austral summer of 2007-08 using hydrographic measurements (CTD and XBT) in conjunction with (1) ship-based observations and satellite-derived estimates of sea ice concentration, and (2) ship-based observations and re-analyses of meteorological variables. The major scientific objectives are as follows: (1) to examine upper ocean characteristics along three transects in the Amundsen Sea and two transects in the Ross Sea within the context of ice-atmosphere variability over the preceding winter-spring season and as compared to other years where data are available; (2) to determine if there is additional evidence of increased upwelling of warm Circumpolar Deep Water onto the shelf in the Amundsen Sea and/or increased freshening in the Ross Sea as has been inferred by previous, but limited, ocean surveys in these regions; and (3) to examine the spatial variability in ocean thermal structure along the ship's track (outside the transects) to provide greater regional context and to compare with ocean XBT data collected during Oden 2006-07. A repeated temperature survey between the Amundsen and Ross Sea is particularly invaluable, given that this sector is the regional center of the high latitude OAI response to ENSO, thus providing opportunity for examining and linking regional oceanic temporal variability to global climate variability. The research will improve our understanding of the high latitude OAI response to climate change, and provide the physical context for the observed biology and geochemistry (investigated by our colleagues. Our results will be made widely available through research publications and internet-available databases, and through the strong public outreach efforts of Lamont-Doherty Earth Observatory. The outreach efforts will help increase awareness and understanding of anthropogenic climate change, melting ice, and ecosystem alteration in the highly sensitive Antarctic.