Sea Ice Measurements during ANZFLUX - The Anzone Winter Flux Experiment

ANZFLUX 期间的海冰测量 - Anzone 冬季通量实验

• 批准号: 9315934
• 负责人: Stephen Ackley
• 金额: $ 24.12万
• 依托单位: Department of Army Cold Regions Research & Engineering Lab
• 依托单位国家: 美国
• 项目类别: Interagency Agreement
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-05-15 至 1997-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9315934&HistoricalAwards=false
• 关键词: Sea; Ice; Measurements; during; ANZFLUX

9315934 Ackley The proposed work is part of an integrated research program ("Anzflux") into the oceanographic structure of upper mixed layer of the eastern Weddell Sea. It is to be carried out from the RVIB Nathaniel B. Palmer in the austral winter of 1994. The work proposed here is a spatially small-scale and mesoscale study of the growth of sea ice in open water, and the physical, chemical, biological, and thermal properties of the existing ice cover. The rates of sea ice growth determine salt and latent heat fluxes that affect the density of the oceanic surface layer. Additionally, longer-term heat and mass balance measurements on various ice types in the vicinity of the ship will be carried out. This involves installing ice thickness gauges, thermistor (temperature) strings, and stress sensors, which will be sampled periodically over the duration of the drift. Radar backscatter and passive microwave emission measurements will be made at several frequencies to establish the dielectric properties of the sea ice and to provide ground truth information for future satellite-based radar experiments. These measurements, in conjunction with other concurrent experiments to quantify the energy brought to the underside of the ice, will form the basis of a regional study of the processes responsible for the relatively thick upper mixed layer and thin ice cover. It is believed that these conditions are only marginally stable, and are maintained by a relatively high upward heat flux, which, if interrupted, could lead to deep vertical convection, and a significant change in the oceanic climate. ***

9315934 Ackley拟议的工作是一个综合研究计划（“Anzflux”）的一部分，该计划旨在研究威德尔海东部上混合层的海洋学结构。 从RVI B Nathaniel B进行。帕尔默在1994年的冬天。 这里提出的工作是一个空间上的小尺度和中尺度的研究海冰在开放水域的增长，和现有的冰盖的物理，化学，生物和热特性。 海冰增长的速度决定了影响海洋表层密度的盐和潜热通量。 此外，还将对船舶附近的各种类型的冰进行长期的热量和质量平衡测量。 这包括安装冰厚计、热敏电阻（温度）串和应力传感器，这些传感器将在漂移期间定期采样。 将在多个频率下进行雷达反向散射和无源微波发射测量，以确定海冰的介电特性，并为未来的卫星雷达实验提供地面实况信息。 这些测量，结合其他同步实验，以量化带到冰底的能量，将形成区域研究的基础上，负责相对厚的上混合层和薄冰盖的过程。 据信，这些条件只是勉强稳定，并由相对较高的向上热通量维持，如果中断，可能导致深层垂直对流和海洋气候的重大变化。 ***