Collaborative Research: Tethered Balloon Measurements of Cloud-Radiation-Sea Ice Interactions at the SHEBA Ice Camp: An Integrated Experimental and Modeling Study

STAMNES, KNUT LUBIN， DAN阿拉斯加大学加州大学圣地亚哥分校BORYS，内华达大学RANDOLPH本研究项目是一个大型，协调，多研究者计划的关键组成部分，北极（示巴）海洋表面热预算。该研究项目将在一艘被冰封的船上进行14个月。在春季到秋季期间，这些研究人员将使用仪器研究气球测量从云层底部到北冰洋永久冰盖表面的近地表大气状况。该研究将与美国能源部大气辐射测量研究项目一起进行。这些研究人员将确定温度和湿度的垂直剖面，作为云层条件变化的函数。他们的研究结果将有助于确定大气加热与冰对热量的吸附是如何耦合的。这些测量对于了解热量是如何被冰反射或吸收的至关重要，因为它在夏季融化，在冬季变厚，以应对气候的季节性变化，特别是不断变化的云层条件。气球测量项目对SHEBA研究小组做出了重要贡献，他们将利用浮冰上的大量仪器和飞行在上面的飞机测量大气变量，以及浮冰上和浮冰下的冰和海洋特性测量。SHEBA的综合测量集将使北极地区的气候模型得以改进。这些改进的模型将有助于更好地预测气候和北极冰盖的持久性，因为如果大气中的二氧化碳含量高于目前的水平，就可能发生全球变暖。

ABSTRACT OPP-9702004 OPP-9701840 STAMNES, KNUT LUBIN, DAN UNIVERSITY OF ALASKA UNIVERSITY OF CALIFORNIA SAN DIEGO OPP-9703565 BORYS, RANDOLPH UNIVERSITY OF NEVADA This research project is a key component of a large, coordinated, multi-investigator program, Surface Heat Budget of the Arctic (SHEBA) Ocean. The research program will be conducted for 14 months from a ship frozen into the ice pack. These investigators will measure near-surface atmospheric conditions of the region from the cloud base to the surface of the permanent ice cap of the Arctic Ocean using an instumented research balloon during a period from Spring to Fall. The research will be conducted in conjunction with a DOE Atmospheric Radiation Measurement research program jointly conducted at the site. These researchers will determine the vertical profile of temperature and humidity as a function of changing cloud conditions. Their results will help determine how atmospheric heating is coupled to adsorption of heat by the ice. These measurements are critical to understanding how heat is reflected or absorbed by the ice as it melts in the summer and thickens in the winter in response to seasonal variations in climate, especially changing cloud conditions. The balloon measurement program makes an essential contribution to the SHEBA team of researchers who will measure atmospheric variables with a large array of instruments on the ice floe and aircraft flying above, as well as ice and ocean property measurements made on and below the ice floe. The combined set of measurements in SHEBA will allow refinement of climate models for the Arctic region. Those improved models will lead to better predictions of the climate and the permanence of the Arctic ice cap under a proposed global warming that could occur if atmospheric carbon dioxide levels are increased above present levels.