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

该合作方案旨在结合冰芯采样技术的进步、安第斯风暴事件气象学知识、网络基础设施以及气候模拟和分析，以从秘鲁和玻利维亚的冰盖中恢复新的雪、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(例如厄尔尼诺/拉尼娜(ENSO)、南美低空急流、南半球贸易和西风)、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功能(例如太阳变异性、火山活动、尘埃、高山冰川的区域消退，加上人口、工业和农业活动的增加，正在产生对未来水资源的需求。水资源的减少可能会放大ENSO的区域影响。关于该区域气候和环境变异性的仪器记录很少，但安第斯中部冰川的冰芯提供了过去几个世纪至几千年的气候动态和大气化学的高分辨率记录来源。从冰芯重建气候可以为现有的多代理重建提供额外的时间和空间背景，以便评估自然和人为导致的物理化学气候变化在风暴尺度上的影响，影响日常和季节之间的事件，并在此过程中开发预测未来变化的模拟。该项目建立在研究人员最近的W.M.Keck基金会和NSF支持的变革性激光冰芯采样以及新发布的、NSF支持的网络基础设施和气候分析工具的基础上。它还包括支持早期职业博士后学者，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.