P2C2: Mechanistic Interpretation of the Spatial Signatures of Mid-Holocene Precipitation over South America and the Atlantic

该项目旨在更好地了解，一般来说，代理可以用来推断过去的气候变化的签名，特别是，以及代理如何与中全新世降水变化在热带南美洲/大西洋地区。研究将侧重于三项活动：㈠量化全新世中期和工业化前条件之间降水空间分布的变化; ㈡查明模型模拟的全新世中期南美洲/大西洋区域水文气候变化的主要驱动因素;和（iii）检查负责中期签名的因果代理和反馈过程，全新世降水量的变化，并评估为什么当代古气候模型的集合往往在解释古气候代理所需的尺度上大幅度分歧。本科生和博士后研究人员将得到支持。古气候模型模拟的输出将被提供给本科生和研究生课程。

This project seeks to better understand, generally, the extent to which proxies can be used to infer signatures of past climate variability and, specifically, how well proxies do with mid-Holocene precipitation variation over the tropical South America/Atlantic region. The research will focus on three activities: (i) quantifying changes in the spatial distribution of precipitation between mid-Holocene and preindustrial conditions; (ii) identifying the principal drivers of South America/Atlantic region hydroclimatic variability in the mid-Holocene as simulated by models; and (iii) examining the causal agents and feedback processes responsible for the signatures of mid-Holocene precipitation change and evaluate why the ensemble of current generation paleoclimate models often diverge substantially at the scales required to interpret paleoclimate proxies.Undergraduate students and a postdoctoral researcher will be supported. Output from the paleoclimate model simulations will be made accessible and incorporated into undergraduate and graduate classes.