权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Sub-Decadal Reconstruction of Drought Patterns in North American's Arid Interior: The Last 2000 Years

北美干旱内陆地区干旱模式的十年重建：过去 2000 年

基本信息

批准号：
9632040
负责人：
Sherilyn Fritz
金额：
$ 12.49万
依托单位：
Lehigh University
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
1996
资助国家：
美国
起止时间：
1996-07-15 至 1998-06-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9632040&HistoricalAwards=false
关键词：
Sub Decadal Reconstruction Drought Patterns

项目摘要

Abstract ATM-9632040 Fritz, S.C. LeHigh University Title: Sub-Decadal Reconstruction of Drought Patterns in North American's Arid Interior: the last 2000 years Recent paleoclimatic studies from several regions of western North America suggest that the climate of the last century may not be representative of long-term patterns of climate variability. Paleolimnological work from southeastern North Dakota suggests that intervals of severe multi-decadal drought have been common during the last two millennia. This award supports a study to reconstruct at sub-decadal intervals the frequency, duration, and magnitude of major drought in the northern Great Plains of North America and to examine how these moisture patterns are manifest in vegetation, hydrology, and geomorphic processes. Reconstructions will be based on analysis of Kettle Lake in northwestern North Dakota, which has laminated, probably varved sediments. This site has the potential to provide an absolute chronology of drought in the north-central grasslands of North America that can be linked to records elsewhere to reconstruct broader scale atmospheric circulation patterns in the past. The project is part of the PEP-1 transect for western North America and is essential for characterization of the east to west structure of the climate system.

ATM-9632040 Fritz，S.C.LeHigh大学题目：北美干旱内陆干旱模式的亚十年重建：过去2000年来自北美西部几个地区的最近古气候研究表明，上个世纪的气候可能不能代表气候变化的长期模式。来自北达科他州东南部的古湖沼学研究表明，在过去的两千年里，严重的几十年干旱的间歇性一直很常见。该奖项支持一项研究，该研究旨在以亚十年为间隔重建北美大平原北部主要干旱的频率、持续时间和程度，并研究这些水分模式如何在植被、水文和地貌过程中表现出来。重建工作将基于对北达科他州西北部的水壶湖的分析，水壶湖有层叠的、可能是不同的沉积物。该网站有可能提供北美中北部草原干旱的绝对年表，可以与其他地方的记录联系起来，重建过去更广泛的大气环流模式。该项目是北美西部PEP-1样带的一部分，对于描述气候系统从东到西的结构至关重要。