Separating Net Accumulation into Precipitation and Sublimation in Firn

0087439沃丁顿该奖项支持一个项目，以开发技术，分离净积累到降水和升华在极地积雪。 该项目将使用现有的模型为积雪通风和模型的化学物质转移到积雪，以创建一个综合模型的蒸汽和化学物质传输的积雪套件的物种，不同的水质量损失。 这个正演模型将预测地球化学对水汽损失的依赖性。 从这些正演模型中获得的知识将被用来解决一个反问题，以预测的水蒸气升华和再沉积量的基础上配置文件的地球化学在积雪。 这个项目是推断古代环境中的降水和蒸发的必要的第一步，例如在冰芯中记录的。 该项目将作为博士学位的基础。在私人侦探的指导下为学生写论文 确定如何最好地从积雪和冰芯中提取气候信息是该项目的主要目标。

0087439 WaddingtonThis award supports a project to develop the techniques for separating net accumulation into precipitation and sublimation in polar firn. The project will use existing models for firn ventilation and models for the transfer of chemical species to firn to create an integrated model of vapor and chemical species transport in firn for suites of species that respond differently to water mass loss. This forward model will predict the dependence of geochemistry on water vapor loss. The knowledge gained from these forward models will then be used to solve an inverse problem to predict the amount of water vapor sublimation and redeposition based on profiles of geochemistry in firn. This project is a necessary first step toward inferring precipitation and evaporation in ancient environments, such as are recorded in ice cores. This project will serve as the basis for a Ph.D. dissertation for a student under the direction of the P.I. Determining how to best extract climate information from firn and ultimately ice cores is the major goal of this project.