Collaborative Research: P2C2--Ultra-High-Resolution Investigation of High Andean Snow and Ice Chemistry to Improve Paleoclimatic Reconstruction and Enhance Climate Prediction

该合作提案旨在将冰芯采样技术、安第斯风暴事件气象学知识、网络基础设施和气候建模与分析结合起来，从秘鲁和玻利维亚的冰盖中恢复新雪、雪坑和冰芯数据。该项目的具体目标是调查南美洲大气环流特征（如El Niño/La Niña （ENSO）、南美洲低空急流、南半球环流和西风带）、热带-中纬度-极地遥相关，以及控制大气环流的关键全球尺度强迫函数的意义（如太阳变率、火山活动、尘埃和温室气体），这些强迫函数与南美洲的水汽和热量输送有重要关系。高山冰川的区域性退缩，加上人口、工业和农业活动的增加，正在产生未来对水资源的需求。水资源的减少可能会放大ENSO的区域影响。该地区气候和环境变化的仪器记录很少，但安第斯山脉中部冰川的冰芯提供了过去气候动力学和大气化学的高分辨率记录来源，这些记录可以追溯到几个世纪到几千年。冰芯的气候重建可以为现有的多代理重建提供额外的时空背景，以便评估自然和人为引起的风暴尺度的物理和化学气候变化的影响，这些变化会影响每天和季节之间的事件，并在此过程中开发预测未来变化的类似物。该项目建立在研究人员最近的W.M.凯克基金会和美国国家科学基金会支持的冰芯变革性激光采样以及新发布的、美国国家科学基金会支持的网络基础设施和气候分析工具的基础上。它还包括支持一名早期职业生涯的博士后学者，开发和测试新的分析工具，以及与南美科学家的密切合作。

This collaborative proposal aims to combine advances in ice core sampling technology, knowledge of Andean storm event meteorology, cyberinfrastructure, and climate modeling and analysis to fresh snow, snowpits and ice core data to be recovered from ice caps in Peru and Bolivia.The specific goals of the project are to investigate South American atmospheric circulation features (e.g. El Niño/La Niña (ENSO), South American Low-level Jet, Southern Hemisphere trades and westerlies), tropical-mid-latitude-polar teleconnections, and the significance of key global-scale forcing functions that control atmospheric circulation (e.g. solar variability, volcanic activity, dusts, and greenhouse gases) and have significant relevance to moisture and heat transport over South America.The regional retreat of alpine glaciers coupled with increased population, industry, and agriculture activities are generating future demands on water resources. Declines in water resources may magnify the regional impacts of ENSO. Instrumental records of climate and environmental variability over the region are sparse yet ice cores from Central Andean glaciers provide a source of high resolution records of past climate dynamics and chemistry of the atmosphere extending back centuries to millennia. Climate reconstructions from ice cores could provide added temporal and spatial context to existing multi-proxy reconstructions in order to assess the impact of natural and human-induced physical and chemical climate change at the storm-scales that impact day to day and season to season events, and in the process, develop analogs for predicting future change.This project builds on the researchers' recent W.M. Keck Foundation and NSF-supported transformative laser sampling of ice cores and the newly released, NSF-supported cyberinfrastructure and climate analysis tools. It also involves supporting an early career post-doctoral scholar, development and testing of new analytical tools, and strong collaboration with South American scientists.