Climate Warming in West Antarctica

南极洲西部气候变暖

• 批准号: 1341695
• 负责人: David Bromwich
• 金额: $ 51万
• 依托单位: Ohio State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2014
• 资助国家: 美国
• 起止时间: 2014-06-01 至 2017-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1341695&HistoricalAwards=false
• 关键词: Climate; Warming; West; Antarctica

The Antarctic Peninsula and West Antarctica are focus areas for climate change. With up to several meters of sea level rise potentially resulting from melting of this region in the coming decades to centuries, the climate trajectory of this region is clearly of global relevance. If surface, or ocean basal melting becomes a significant component of the surface mass balance, it could contribute to the weakening of fringing ice shelves with a resulting marked acceleration of currently grounded ice stream discharging into the Southern Ocean. Thus, better understanding of the climate warming in West Antarctica has strong scientific and societal justification.The project will combine existing temperature records from manned and automatic weather stations, satellite data, ERA interim reanalysis, and the perspective provided by recent (~200) yr ice core (borehole) data reconstructed into the WRF model to yield high resolution (10km) surface temperature history throughout the West Antarctic Ice sheet (WAIS). This will help resolve recent disagreement on the extent of warming in the WAIS region. Additional comparisons of the climate reconstructions with and without the influences of satellite records on the reconstructions will also be investigated.

南极半岛和西南极洲是气候变化的重点地区。由于未来几十年到几个世纪该地区的融化可能导致海平面上升数米，因此该地区的气候轨迹显然与全球相关。如果地表或海洋基底融化成为地表质量平衡的重要组成部分，它可能会导致边缘冰架的削弱，从而导致目前接地的冰流显着加速流入南大洋。因此，更好地了解南极洲西部的气候变暖具有强有力的科学和社会合理性。该项目将结合人工和自动气象站的现有温度记录、卫星数据、ERA 中期再分析以及最近（~200）年提供的观点将冰芯（钻孔）数据重建到 WRF 模型中，以生成整个南极西部冰盖 (WAIS) 的高分辨率（10 公里）表面温度历史。这将有助于解决最近关于 WAIS 地区变暖程度的分歧。 还将研究有和没有卫星记录对重建的影响的气候重建的额外比较。