Multi-frequency microwave remote sensing of ocean-sea ice-atmosphere dynamics in response to climate change

气候变化对海洋-海冰-大气动态的多频微波遥感

• 批准号: RGPIN-2022-05217
• 负责人: Scharien, Randall
• 金额: $ 2.62万
• 依托单位: University of Victoria
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=754823
• 关键词: Multi; frequency; microwave; remote; sensing

Rapidly changing Arctic sea ice is progressively challenging our capacity for evaluating ecological consequences, achieving socio-economic benefits while balancing environmental risks, and making evidence-based policy decisions. Emerging Arctic sea ice conditions are also creating new problems for existing, satellite-based, observation systems, while developing observation systems are introducing new opportunities. This research program merges new information about the evolving geophysical properties of the Arctic ocean-sea ice matrix with leading-edge microwave remote sensing technologies, to improve sea ice observational capacity for climate research, with emphasis on the study of ocean-sea ice-atmosphere dynamics at local to regional-scales. The core project objective is to develop new sea ice indicators that utilize current active microwave systems, namely synthetic aperture radar (SAR), so that sea ice properties and related biophysical processes can be observed and studied over a wider set of environmental conditions than are currently known. It will be achieved by addressing critical knowledge gaps in the connection between in situ geophysical, thermodynamic, and active microwave scattering properties of the sea ice volume, and merging new knowledge with effective scaling methods for exploitation of space-borne sensors. Within this context, advancements in satellite imaging capabilities, such as compact polarimetry (CP), rapid-revisit constellations, and C- and L-band frequency SAR fusion will be assessed. Regionally, the project will focus on the Canadian Arctic Archipelago and adjacent waters through which sea ice is exchanged. Secondary objectives, achievable through developed collaborations and partnerships, include: (1) implementation of newly developed satellite-based sea ice and ocean surface retrievals, along with in situ measurements, in the development of efficient and improved parameterizations for numerical sea ice-ocean models, leading to improved simulations of atmosphere-ice-ocean physics and marine forecasts; and (2) translation of detected sea ice information to residents of Arctic communities, to inform safe and efficient travel and preservation of sea ice-associated cultural traditions.

快速变化的北极海冰逐渐挑战了我们评估生态后果，实现社会经济益处的能力，同时平衡环境风险并做出基于证据的政策决策。新兴的北极海冰条件也为现有的基于卫星的观察系统带来了新的问题，而开发观察系统正在引入新的机会。该研究计划合并了有关北极海洋冰基质与领先的微波遥感技术不断发展的地球物理特性的新信息，以提高气候研究的海冰观察能力，重点是研究当地的海洋冰冰冰期动力学。核心项目目标是开发新的海冰指标，以利用当前的活动微波系统，即合成孔径雷达（SAR），以便可以在更广泛的环境条件下观察和研究海冰性能和相关的生物物理过程。这将通过解决原位地球物理，热力学和主动微波散射特性之间的关键知识差距来实现，并将新知识与有效缩放方法合并以利用太空传感器。在这种情况下，将评估卫星成像能力的进步，例如紧凑型极化（CP），快速撤退的星座以及C和L波段频率SAR融合。在区域上，该项目将集中于加拿大北极群岛和邻近水域的海冰。通过开发的合作和合作伙伴关系可以实现的次要目标包括：（1）实施新开发的基于卫星的海冰和海洋表面检索，以及现场测量，以开发高效和改进的参数，以进行数值海冰模型的高效和改进的参数，从而导致改进的大气 - 冰球物理学和海上均等的仿真模拟； （2）将检测到的海冰信息转换给北极社区的居民，以告知安全有效的旅行并保存与海冰相关的文化传统。