RAPID: Observing the Disintegration of the Scar Inlet Ice Shelf
RAPID:观察疤痕湾冰架的崩解
基本信息
- 批准号:1565576
- 负责人:
- 金额:$ 19.93万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:2015
- 资助国家:美国
- 起止时间:2015-12-01 至 2017-11-30
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Pettit/1565576This award supports a Rapid Response Research (RAPID) project to observe the current weakened state of the Scar Inlet Ice Shelf, and potentially capture data during its anticipated disintegration. The Scar Inlet Ice Shelf (SIIS) is the southern remnant of the former Larsen B Ice Shelf, which disintegrated in March of 2002. Since then, the SIIS has weakened significantly but has not yet broken up. Cooler conditions than those seen prior to 2006 have reduced the chance of a disintegration in recent years, although a single warm season is likely to be enough to trigger such an event. The predicted "Super El Nino" for this austral summer may have significant effects on Antarctica's weather, potentially leading to a break-up or disintegration this year. Given the very weak state of the SIIS, it is urgent that we act now to better understand the processes involved in shelf disintegration or break-up of ice shelves. The goal of this work is to collect several key data sets, publish initial observations and preliminary conclusions, and then make the complete data record available to all scientists.Extreme changes in the stress conditions on the SIIS resulted from both the loss of the Larsen B ice plate and the continued inflow of ice from three large glaciers (Flask, Leppard, and Starbuck). The SIIS now has a number of large rifts and it is expected to break up or disintegrate in the very near future. Past research has made use of satellite data and weather instruments, establishing many of the current ideas regarding ice shelf break-ups and ice shelf weakening. Additional ground-based data to be collected under this study will test a number of hypotheses regarding pre-disintegration characteristics, triggering mechanisms, fracturing processes, runaway feedback effects, and stabilizing mechanisms. The project will collect extensive multi-instrument field observations of the SIIS and possibly capture a major disintegration event. In collaboration with the British Antarctic Survey, a team of 4 people will be deployed via Twin Otter for up to 4 weeks to a site with a broad view of the shelf and will install several temporary observing instruments there. The study derives its intellectual merit from the role of the Antarctic Peninsula as a microcosm of how other parts of Antarctica might evolve and de-glaciate in the next few centuries. The broader impacts include an opportunity to educate the public about the anticipated collapse of this remnant ice shelf and its relationship to future changes in Antarctica. The potential for wide media coverage (through a connection with the National Geographic) will underscore the critical changes scientists are observing in the crysophere driven by climate change. This proposal requires field work in Antarctica.
Pettit/1565576该奖项支持快速反应研究(RAPID)项目,以观察疤痕入口冰架目前的弱化状态,并可能在其预期的解体期间捕获数据。疤痕入口冰架(SIIS)是前拉森B冰架的南部残余,于2002年3月解体。从那时起,SIIS已经明显减弱,但尚未解体。比2006年之前更冷的条件降低了近年来解体的可能性,尽管一个温暖的季节可能足以引发这样的事件。今年夏天预测的“超级厄尔尼诺”可能会对南极洲的天气产生重大影响,可能导致今年的分裂或解体。 鉴于SIIS的状态非常薄弱,我们迫切需要立即采取行动,更好地了解冰架解体或破裂所涉及的过程。这项工作的目标是收集几个关键的数据集,发表初步的观察和初步的结论,然后使完整的数据记录提供给所有的科学家。在SIIS上的应力条件的极端变化导致的拉森B冰板的损失和持续流入的冰从三个大冰川(弗拉斯克,莱帕德,和星芭儿)。SIIS现在有一些大裂缝,预计在不久的将来会破裂或解体。过去的研究利用了卫星数据和气象仪器,建立了目前关于冰架破裂和冰架弱化的许多想法。本研究收集的其他地面数据将检验关于解体前特征、触发机制、破裂过程、失控反馈效应和稳定机制的若干假设。该项目将收集SIIS的广泛的多仪器现场观测,并可能捕获一个重大的解体事件。在英国南极调查局的合作下,一个由4人组成的小组将通过Twin Otter部署到一个可以看到大陆架的地点,为期4周,并将在那里安装几个临时观测仪器。这项研究的学术价值来自南极半岛的作用,它是南极洲其他地区在未来几个世纪可能如何演变和冰川消融的缩影。更广泛的影响包括有机会教育公众了解这一残余冰架的预期崩溃及其与南极洲未来变化的关系。媒体广泛报道的潜力(通过与国家地理的联系)将强调科学家们在气候变化驱动下观察到的crysophere的关键变化。 这项建议需要在南极洲进行实地工作。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Erin C Pettit其他文献
Erin C Pettit的其他文献
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{{ truncateString('Erin C Pettit', 18)}}的其他基金
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$ 19.93万 - 项目类别:
Continuing Grant
NSF-NERC: Thwaites-Amundsen Regional Survey and Network (TARSAN) Integrating Atmosphere-Ice-Ocean Processes affecting the Sub-Ice-Shelf Environment
NSF-NERC:Thwaites-Amundsen 区域调查和网络 (TARSAN) 整合影响冰架下环境的大气-冰海过程
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1063649 - 财政年份:2011
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0806317 - 财政年份:2008
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