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. ***

拟议的工作是威德尔海东部上部混合层海洋学结构综合研究项目（“Anzflux”）的一部分。它将在1994年南部冬季从纳撒尼尔·b·帕尔默RVIB进行。本文提出的工作是对开放水域海冰生长的空间小尺度和中尺度研究，以及现有冰盖的物理、化学、生物和热性质。海冰的生长速率决定了影响海洋表层密度的盐通量和潜热通量。此外，将对船附近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，这些传感器将在漂流期间定期采样。雷达后向散射和无源微波发射测量将在几个频率上进行，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真实信息。这些测量，连同其他同时进行的实验，将量化带到冰底的能量，将构成对造成相对较厚的上层混合层和薄冰盖的过程的区域研究的基础。据信，这些条件只是略微稳定，并由相对较高的向上热通量维持，如果中断，可能导致深垂直对流，并在海洋气候中发生重大变化。* * *