Collaborative Research: Developing Records of Hydroclimate Variability in the Southeastern United States from the Middle Holocene to Present-Day

合作研究：开发美国东南部从中全新世至今水文气候变化的记录

• 批准号: 2054242
• 负责人: Aubrey Hillman
• 金额: $ 21.52万
• 依托单位: SUNY at Albany
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-09-01 至 2024-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2054242&HistoricalAwards=false
• 关键词: Collaborative; Research; Developing; Records; Hydroclimate

The Southeastern United States is an important agricultural region, but recent flooding and drought events have caused billions of dollars in economic loss. There is a lack of understanding about what drives changes in precipitation-evaporation (hydroclimate) trends, in part because there are fewer paleoclimate records from this region compared to the rest of the United States. This project will collect sediment cores from four lakes, two in northern Georgia and Alabama and two in the south. These regions are expected to respond differently depending on what predominantly controls hydroclimate. This project will establish if these lakes have records that are suitable for further, in-depth study of the past 5000 years and can ultimately identify what is an important control of hydroclimate and how it changed through time.This project’s central hypothesis is that from 4000 years BP onwards, hydroclimate in the Southeastern United States has been predominantly controlled by the Pacific North American pattern which manifests as a precipitation dipole at the selected study sites. This project will focus attention on: 1) dating the collected sediment sequences from depocenter and transect cores, 2) establishing whether sediment accumulation is sufficient enough to test the hypothesis, and 3) documenting the stratigraphic sequences in the collected cores. Preliminary work on physical (grain size), geochemical (carbon and nitrogen), and biological (pollen) parameters in the sediments will also establish the feasibility of pursuing additional study.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

美国东南部是一个重要的农业军团。在南方的两个人都会根据哪些人控制氢化物，这将确定这些项目是否适用于氢气气候的重要控制以及该项目的中心假设是从4000年4000年开始，美国东南部的氢化气候主要由太平洋北部的模式s作为当前的偶极子在选定的研究地点进行，2）确定Sediment是否积累了假设和假设和假设。 3）他收集了核心（晶粒尺寸），地球化学（碳和氮）和沉积物中的生物（花粉）参数的初步工作。 。