Holocene and Last-Glacial Burial Fluxes of Charcoal

摘要 ATM-9422858 Ruddiman，William F. 弗吉尼亚大学 标题：全新世和末次冰期木炭埋藏通量 无论是在今天还是在历史和地质历史上，大空间尺度上的木炭埋藏通量基本上仍然未知。 木炭分析的最新进展开辟了新的研究机会，其中两个是本项目的目标：（1）在全球碳清单的背景下确定木炭布皮尔率，重点是在化石燃料时代之前建立全新世晚期通量的基线； (2) 探索风成木作为过去 2 万年的古气候指标，特别关注其在区分源区水分平衡变化和风强度变化方面的用途。 该奖项支持以下任务：（1）努力量化全新世晚期和末次盛冰期主要大陆顺风海洋沉积物中风成木炭的埋藏通量； (2) 对大陆边缘各种矿床潜在的巨大木炭埋藏率进行初步勘探； （3）对湖泊沉积物进行初步调查，以测试新的木炭分析方法的适用性并评估沉积学并发症。

Abstract ATM-9422858 Ruddiman, William F. University of Virginia Title: Holocene and Last-Glacial Burial Fluxes of Charcoal The burial flux of charcoal over large spatial scales remains basically unknown, both today and in the historical and geological past. Recent advances in charcoal analysis have opened up new research opportunities, two of which are targeted in this project: (1) a qualification of charcoal bupial rates in the context of global carbon inventories, with an emphasis on establishing baseline late Holocene fluxes prior to the fossil-fuel era; (2) an exploration of eolian charcoal as a paleoclimatic indicator during the last 20,000 years, with particular attention to its use in distinguishing changes in source-area moisture balances from changes in wind strength. This award supports the following tasks: (1) an effort to quantify burial fluxes of eolian charcoal during the late Holocene and last- glacial maximum in ocean sediments downwind from the major continents; (2) initial explorations of potentially large charcoal burial rates in a variety of deposits along continental margins; and (3) initial investigation of lacustrine sediments to test the applicability of the new charcoal analysis method and to evaluate sedimentological complications.