Collaborative Research: Transient response of regional sea level to Antarctic ice shelf fluxes

合作研究：区域海平面对南极冰架通量的瞬态响应

• 批准号: 2048576
• 负责人: Laure Zanna
• 金额: $ 46.5万
• 依托单位: New York University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-03-01 至 2025-02-28
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2048576&HistoricalAwards=false
• 关键词: Collaborative; Research; Transient; response; regional

This project will investigate the effects of Antarctic ice melting on the regional variations of sea level over time. Ocean and climate models will be used in conjunction with observations to study how the timing and location of ice melt affects regional sea level rise. Increasing sea level from climate change impacts coastal communities. Understanding how those impacts vary globally is an important priority. The project will also provide workshop training for teachers in K-12 schools on the topic of using numerical models to make forecasts and predictions.The primary objective of the proposed study is to investigate the time-evolving sensitivity of regional sea level to fluxes associated with Antarctic ice shelf basal melt. This question will be addressed using a hierarchy of ocean and climate models, ranging from idealized reduced-gravity models to an eddy-permitting ocean model to a state-of-the-art coupled global climate model, informed by observational data. Specific questions to be addressed include: (1) What are the timescales, amplitudes, and patterns of dynamic sea level changes around the globe in response to subsurface freshwater and latent heat perturbations along the Antarctic coast? (2) What are the dynamic mechanisms in the ocean governing these responses? (3) What are the potential impacts of Antarctic ice shelf basal melt fluxes on sea level at locations around the globe, on timescales from decades to centuries? The response of the ocean to meltwater injection and latent heat cooling at depth, which is expected to be dictated by a mixture of baroclinic and barotropic circulation anomalies, has been largely absent from previous literature on sea level rise.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

该项目将调查南极冰融化对海平面随时间变化的区域影响。海洋和气候模型将与观测结合使用，以研究冰融化的时间和位置如何影响区域海平面上升。气候变化导致的海平面上升影响着沿海社区。了解这些影响如何在全球范围内变化是一个重要的优先事项。该项目还将为幼儿园至12年级学校的教师提供讲习班培训，讲授如何使用数值模型进行预报和预测，拟议研究的主要目标是调查区域海平面随时间变化对与南极冰架底部融化有关的通量的敏感性。这个问题将使用海洋和气候模型的层次结构来解决，从理想化的重力降低模型到允许涡流的海洋模型，再到最先进的全球气候耦合模型，并以观测数据为依据。要解决的具体问题包括：（1）什么是时间尺度，幅度和模式的动态海平面变化的地球仪周围的地下淡水和潜热扰动沿着南极海岸？(2)海洋中支配这些反应的动力机制是什么？(3)在几十年到几百年的时间尺度上，南极冰架底部融化通量对地球仪各地海平面的潜在影响是什么？海洋对深层融水注入和潜热冷却的响应，预计将由斜压和正压环流异常的混合物决定，在以前的海平面上升文献中基本上没有。该奖项反映了NSF的法定使命，并被认为值得通过使用基金会的智力价值和更广泛的影响审查标准进行评估来支持。

项目成果

Relating Patterns of Added and Redistributed Ocean Warming

海洋变暖增加和重新分布的相关模式

• DOI: 10.1175/jcli-d-21-0827.1
• 发表时间: 2022
• 期刊: Journal of Climate
• 影响因子: 4.9
• 作者: Newsom, Emily;Zanna, Laure;Khatiwala, Samar
• 通讯作者: Khatiwala, Samar