Surface Energy Balance on West Antarctica and the Ross Ice Shelf

西南极洲和罗斯冰架的表面能量平衡

基本信息

批准号：
1744954
负责人：
Dan Lubin
金额：
$ 48.96万
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：
2018
资助国家：
美国
起止时间：
2018-11-15 至 2021-10-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1744954&HistoricalAwards=false
关键词：
Surface Energy Balance West Antarctica

项目摘要

Atmospheric warming has been a major factor in the loss of ice shelves on the Antarctic Peninsula. In West Antarctica, oceanic warming is presently regarded as the largest source of stress on both the ice-shelves and at the grounding lines of the ice sheets. The loss of ice shelf buttressing and grounding line retreat may have already induced irreversible loss of Thwaites Glacier. To advance predictive models more data is needed regarding both water-induced fracturing on an ice shelf and marine ice cliff instability near the grounding line. This project will help advance understanding of atmospheric circulation and solar radiation over West Antarctica and the Ross Ice Shelf that lead to surface melting. In support of this project, and incorporating Antarctic science from this work, UCSD educators will sponsor a workshop series for exemplary middle and/or high school science teachers designed to address this need. Teacher participants will be carefully selected for their demonstrated leadership skills and will eventually become part of an cadre of "master" science teachers who will serve as local leaders in disseminating strategies and tools for addressing the NGSS (Ca Next Gen. of Sci. Eng. Stds.) to teachers throughout the county.For the summer field seasons requested, UCSD scientists will deploy a suite instruments to measure downwelling and net shortwave and longwave fluxes, sensible and latent heat fluxes, and near-surface meteorology. This suite of instruments will be self-reliant with power requirements and will be supportable in the field with a single Twin Otter aircraft. The investigators plan to deploy this suite as a remote ice camp with a field party of 2-3 personnel, making measurements for at up to one month during each of the sampled summer field seasons. These measurements will be analyzed and interpreted to determine mesoscale conditions that govern surface melt in West Antarctica, in the context of improving coupled climate model parameterizations.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.

大气变暖一直是南极半岛上冰架丧失的主要因素。在南极西部，海洋变暖目前被视为冰壳和冰盖接地线上的最大压力来源。冰架支撑和接地线的丧失可能已经引起了冰川的不可逆转损失。为了推动预测模型，需要更多关于在接地线附近冰架上的水引起的压裂和海上冰悬崖的不稳定性的数据。该项目将有助于提高南极西部和罗斯冰架上大气循环和太阳辐射的了解，从而导致表面熔化。为了支持该项目，并结合了这项工作的南极科学，UCSD教育工作者将赞助旨在满足这一需求的典范中学和/或高中科学老师的研讨会系列。教师的参与者将被精心挑选为他们的领导能力，并最终将成为“大师”科学老师的一部分，他们将担任当地领导者，以传播策略和工具，以解决NGSS（CA CASci。Eng。Stds。CANever ofSci。Eng。Stds。）向整个县的老师提供夏季野外季节。明智的和潜热通量，以及近地表气象。这套仪器将具有自力更生，并具有功率要求，并可以在单台双水獭飞机中获得支持。调查人员计划将这套套件部署为一个偏远的冰训练营，其中一个由2-3名人员组成的野外派对，在每个采样的夏季赛季中，最多可用于一个月。将在改善耦合的气候模型参数化的背景下，分析和解释这些测量，以确定在南极西南部控制地面熔体的中尺度条件。该奖项反映了NSF的法定任务，并被认为是值得通过基金会的知识分子和更广泛影响的评估来通过评估来获得支持的。