SGER: Modeling Heat Exchange between Arctic Leads and Underlying Water Utilizing Be7 Measurements

SGER：利用 Be7 测量对北极铅和底层水之间的热交换进行建模

• 批准号: 9809168
• 负责人: Mark Stephens
• 金额: $ 6.4万
• 依托单位: University of Miami
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-04-01 至 2000-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9809168&HistoricalAwards=false
• 关键词: SGER; Modeling; Heat; Exchange; between

9809168 Kadko One of the important unknowns in the summer surface energy balance of the Arctic Ocean involves the fate of the energy inputs (mostly shortwave radiation) in the heterogeneous ice-ocean system during the melt season. Downwelling solar radiation is the primary source for the direct heating of the ocean through leads, but the fate of the solar energy absorbed through the leads is not adequately known. To understand the ice-albedo feedback, one must know how the energy is partitioned between lateral melting of floe edges, bottom melting of ice, or warming of the water column. In this work, the heat exchange between the leads and underlying mixed layer will cosmic ray produced species which is delivered to the earth's surface, and as such can be used as a proxy for incoming solar radiation. Because it has a known decay rate, it can be used to estimate the mean exposure time of lead water to solar insolation, and the delivery rate of solar energy to the ice bottom. The mean life of the isotope is 77 days, and thus it is an ideal tracer for evaluating seasonal processes. Samples for this analysis were collected as part of the initial SHEBA (Surface Heat Budge of the Arctic Ocean) field program, and measurement of Be-7 were successfully made. These are the first measurements of this isotope ever made under the Arctic ice.

9809168 KADKO北极海洋表面能量平衡中重要的未知数之一涉及在融化季节异质冰山系统中能量输入（主要是短波辐射）的命运。 偏低的太阳辐射是通过导线直接加热海洋的主要来源，但是通过铅吸收的太阳能的命运并不足够。为了了解冰 - 阿尔贝多的反馈，必须知道如何在浮动边缘的侧向熔化，冰的底部熔化或水柱变暖之间分配能量。 在这项工作中，铅和基础混合层之间的热交换将产生宇宙射线产生的物种，该物种被输送到地球表面，因此可以用作传入太阳辐射的代理。由于它具有已知的衰减速率，因此可以用来估计铅水对太阳能日光降解的平均暴露时间以及太阳能向冰底部的递送速度。同位素的平均寿命为77天，因此它是评估季节性过程的理想示踪剂。 作为初始SHEBA（北极海洋表面热点）野外计划的一部分收集了该分析的样品，并成功地进行了测量。这些是在北极冰下进行的这一点的第一个测量。