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

基本信息

批准号：
2048590
负责人：
Ian Eisenman
金额：
$ 63.52万
依托单位：
University of California-San Diego Scripps Inst of Oceanography
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=2048590&HistoricalAwards=false
关键词：
Collaborative Research Transient response regional

项目摘要

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.

该项目将研究南极冰融化对随着时间的推移区域差异的影响。海洋和气候模型将与观察结果结合使用，以研究冰融化的时间和位置如何影响区域海平面上升。气候变化的海平面提高会影响沿海社区。了解这些影响在全球范围内如何变化是重要的优先事项。该项目还将为K-12学校的教师提供讲习班培训，以使用数值模型来进行预测和预测。拟议研究的主要目的是调查区域海平面对与相关助剂的时间不断发展的敏感性南极冰架基础熔体。这个问题将使用海洋和气候模型的层次结构来解决，从理想化的降低重力模型到涡流的海洋模型，再到由观察数据所启示的最先进的耦合的全球气候模型。要解决的具体问题包括：（1）响应于南极海岸沿线的地下淡水和潜在热扰动，全球动态海平面变化的时间表，幅度和模式是什么？（2）管理这些反应的海洋中有什么动态机制？（3）南极冰架基底熔体在全球位置，几十年到几个世纪的时间尺度上对海平面的潜在影响？海洋对融水注入和深度的潜热冷却的反应，预计将取决于斜压和正压循环异常的混合物，这在很大程度上是从先前的有关海平面上升的文献中的。使用基金会的知识分子优点和更广泛的审查标准，通过评估被认为值得支持。