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: 1203440
• 负责人: Bonnie Light
• 金额: $ 17.64万
• 依托单位: University of Washington
• 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 2017-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1203440&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地表水的季节性变暖与太阳能吸收之间的联系，并确定负责这种吸收的材料的存在和季节性循环。 海冰内太阳辐射的衰减和水柱上30m的季节性变化将通过新的概念浮标系统的高颞分辨率（小时）来测量。温度和PAR（光合有效的辐射）辐照度测量将使用与水柱和海冰中的助手配对的光学传感器进行。荧光计将用于定量叶绿素，彩色溶解有机材料（CDON）和地表水中的光反向散射。这些传感器将用于计算冰和水柱内的弥漫性衰减系数（KD），并确定冰块下浮游植物和CDOM的季节性循环。这些光学观测和温度观察之间的关系将使人们能够约束北极加热预算的每日水柱的吸收成分。这个概念的最终目标将在整个北极，冰覆盖和开放的水域中看到这些浮标的网络。该工作计划包括在早春的多年冰中部署的多个部署，包括Beaufort Gyre和GeoSission Ice Base。该站点的数据将通过在营地时进行的其他测量以及其他地理项目的补充研究来增强。结果将通过与Science Alliance Live，Polar Science Weekend和华盛顿大学的课程合作来传播结果。 浮标数据也将在项目网站上接近实时可视化。所有数据将在1年内提交给Cadis。