Collaborative research: Warming and irradiance measurements in the Arctic: Determining the link between solar energy absorption and surface warming through long term observations

合作研究：北极变暖和辐照度测量：通过长期观测确定太阳能吸收与地表变暖之间的联系

• 批准号: 1203784
• 负责人: Victoria Hill
• 金额: $ 99.82万
• 依托单位: Old Dominion University Research Foundation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-09-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1203784&HistoricalAwards=false
• 关键词: Collaborative; research; Warming; irradiance; measurements

The objectives of the proposed research are to quantify the connection between seasonal warming of arctic surface waters and the absorption of solar energy, and additionally to identify the presence and seasonal cycling of materials responsible for this absorption. Seasonal changes in the attenuation of solar radiation within the sea ice and upper 30m of the water column will be measured at high temporal resolution (hourly) by a new proof of concept buoy system. Temperature and PAR (photosynthetically active radiation) irradiance measurements will be made using optical sensors paired with thermisters within the water column and sea ice. A fluorometer will be used to quantify chlorophyll, colored dissolved organic material (CDOM) and light backscattering within surface waters. These sensors will be used to calculate diffuse attenuation coefficients (Kd) within the ice and water column, and to determine the seasonal cycling of phytoplankton and CDOM under the ice. The relationship between these optical and temperature observations will enable one to constrain the daily water column absorption component of the Arctic heating budget. The ultimate goal of this concept would see a network of these buoys throughout the Arctic, in both ice-covered and open waters. The work plan includes several deployments in multiyear ice, including the Beaufort gyre and the Geomission ice base in early spring. Data at this site will be augmented by additional measurements made whilst at the camp, along with complementary studies by other Geomission projects. Results will be disseminated through collaboration with Science Alliance Live, at Polar Science Weekend, and in curricula at the University of Washington. Buoy data will also be visualized in near real time on the project website. All data will be submitted within 1 year to CADIS.

拟议研究的目标是量化北极表面沃茨的季节性变暖与太阳能吸收之间的联系，并确定导致这种吸收的材料的存在和季节性循环。 将通过一个新的概念验证浮标系统，以高时间分辨率（每小时）测量海冰和水柱上部30米内太阳辐射衰减的季节性变化。温度和PAR（光合有效辐射）辐照度测量将使用光学传感器与水柱和海冰内的热敏电阻配对进行。将使用荧光计来量化叶绿素、有色溶解有机物（CDOM）和表面沃茨内的光后向散射。这些传感器将用于计算冰和水柱内的扩散衰减系数（Kd），并确定冰下浮游植物和CDOM的季节性循环。这些光学和温度观测之间的关系将使人们能够限制北极加热预算的每日水柱吸收部分。这一概念的最终目标是在整个北极地区建立一个浮标网络，包括冰层覆盖的水域和开放的沃茨。工作计划包括在多年冰中的几次部署，包括早春的博福特环流和Geomission冰基地。该地点的数据将通过在营地进行的额外测量来补充，沿着其他Geomission项目的补充研究。研究结果将通过与科学联盟现场合作、在极地科学周末以及在华盛顿大学的课程中传播。 浮标数据也将在项目网站上以接近真实的时间显示出来。所有数据将在一年内提交给CADIS。