Collaborative Research: Cascadia Slope Circulation Study

0526634/0526231智力上的优点：本项目将继续观察和了解华盛顿和俄勒冈州外大陆坡--卡斯卡迪亚斜坡--上高产的东北太平洋边界流区域的物理和生物学，并保持自主、持续的存在。一年多来，海上滑翔机，远程自主水下航行器，已被部署调查的温度，盐度，溶解，氧气，叶绿素荧光，和光学后向散射结构的斜坡关闭。华盛顿。海上滑翔机每两周收集一次从离岸220公里的大陆架边缘收集的数据，每次潜水后报告数据，部署通常持续4-5个月。观测的目的是通过收集高度空间和时间分辨的观测数据来检测加州海流系统这一部分的季节和年际变化。使用海上滑翔机使得扩展高分辨率观测成为可能，否则如果由船只进行，则会非常昂贵。这个为期三年的项目将：1）分析已经收集的超过16个月的Seaglider观测，2）继续Seaglider观测计划到大陆架上方，3）分析新收集的数据以描述北方加州海流系统的季节和年际结构。在现有的海底滑翔机重复断面的时间延长是必要的，自信地描述在卡斯卡迪亚斜坡区域的季节性和年际变化，并解决和理解（主要是平流）的过程，负责这种变化。手头的数据提供了诱人的暗示，在低频率的变化，但1.5年的记录沿着两个横坡部分是太有限，以支持定量理解。更广泛的影响：从这个项目的结果将提高物理和生物的气候变化的理解。通过在一段持续的时间内自主测量重要的海洋学参数，将有可能在一个具有重要经济意义的地区建立前所未有的气候记录。通过扩大自主样带的空间覆盖范围，我们将能够解决和理解平流的贡献。该项目的结果将有助于资源规划者了解沿海区生态系统和大规模海洋环流对太平洋西北部沿海和河口条件的影响。我们将继续开展外联活动，向当地学校介绍情况，开放日，公开讲座，并与地方，国家和国际层面的印刷和电子媒体联系。

0526634/0526231Intellectual Merits:This project will continue to observe and understand the physics and biology of the highly productive northeast Pacific boundary current region over the continental slope off Washington and Oregon - the Cascadia slope - with an autonomous, sustained presence. For over a year, Seagliders, long-range autonomous underwater vehicles, have been deployed to survey the temperature, salinity, dissolved, oxygen, chlorophyll fluorescence, and optical backscatter structure of the slope off. Washington. Seagliders have collected data on sections from the continental shelf edge offshore 220 km at fortnightly intervals, reporting back data after each dive, on deployments typically lasting 4-5 months. The objective of the observations has been to detect seasonal and inter-annual variability in this part of the California Current system by collecting highly spatially and temporally resolved observations. Using Seagliders makes possible extended high resolution observations that would otherwise be prohibitively expensive if carried out by ships. This three-year project will: 1) analyze more than 16 months of Seaglider observations already collected, 2) continue the Seaglider observational program to over the continental shelf, and 3) analyze the newly collected data to describe the seasonal and interannual structure of the northern California Current system. Extension in time over the existing Seaglider repeat transects is necessary to confidently describe seasonal and interannual variability in the Cascadia slope region and to resolve and understand the (primarily advective) processes that are responsible for this variability. The data in hand offer tantalizing hints at the low frequency variability, but the 1.5 year record along two cross-slope sections is too limited to support quantitative understanding.Broader Impacts:The results from this project will improve physical and biological understanding of climate change. By autonomously measuring important oceanographic parameters over a sustained period of time, it will be possible to establish an unprecedented climate record in an economically important area. By expanding the spatial coverage of the autonomous transects, we will be able to resolve and understand the contribution of advection. The results of this project will benefit resource planners by helping to understand the coastal zone ecosystem and influences of large scale ocean circulation on coastal and estuarine conditions in the Pacific Northwest. We will continue our outreach activities with presentations to local schools, open houses, public talks, and contacts with print and electronic media on local, national and international levels.