Tree-ring analysis of ancient baldcypress trees and subfossil wood
Tree-ring analysis of ancient baldcypress trees and subfossil wood
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古落叶松及亚化石木材的年轮分析
DOI：
10.1016/j.quascirev.2011.11.005
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发表时间：
2012
影响因子：
4
通讯作者：
K. Wolff
中科院分区：
文献类型：
--
作者：
D. Stahle;D. Burnette;J. Villanueva;Julián Cerano;Falko K. Fye;R. D. Griffin;M. K. Cleaveland;D. Stahle;J. Edmondson;K. Wolff
在湿地和河流环境中发现的古代秃柏树已被用来开发一个网络，从美国东南部延伸到墨西哥，并进入危地马拉西部的精确的年度年轮宽度年表。这些年表是敏感的生长季节降水，尽管经常被淹没的网站条件，并已被用来重建水分水平的美国东南部和墨西哥超过1000年。厄尔尼诺/南方涛动（ENSO）是对这些Baldcypress年表的气候重建的主要影响，特别是在墨西哥，一些最极端的重建干旱发生在厄尔尼诺事件期间。在东南部，ENSO对气候和树木生长的影响从春季到夏季变化，这种动力强迫的变化记录在早材和晚材宽度的亚季节年表中。大多数现有的落羽杉年表已延长与树木年轮数据从“亚化石”木材恢复表面和水下沉积物。保存完好的亚化石测井也从埋藏的大年龄沉积物中大量恢复，并可能允许长期连续的全新世年表和不连续的“浮动”更新世年表的发展。在华盛顿街道下方6米处发现的广泛的亚化石秃柏树沼泽被波托马克河口的海侵所侵占，可能是在上一次超级间冰期（海洋OIS 5e）期间，并为未减轻的人为变暖和海平面上升的一个潜在影响提供了直接证据。
Ancient baldcypress trees found in wetland and riverine environments have been used to develop a network of exactly dated annual ring-width chronologies extending from the southeastern United States, across Mexico, and into western Guatemala. These chronologies are sensitive to growing season precipitation in spite of frequently flooded site conditions, and have been used to reconstruct moisture levels the southeastern United States and Mexico for over 1000 years. The El Nino/Southern Oscillation (ENSO) is a major influence on the climate reconstructions derived from these baldcypress chronologies, especially in Mexico where some of the most extreme reconstructed droughts occurred during El Nino events. In the Southeast, the ENSO influence on climate and tree growth changes sign from spring to summer, and this change in dynamical forcing is recorded by sub-seasonal chronologies of earlywood and latewood width. Most existing baldcypress chronologies have been extended with tree-ring data from “subfossil” wood recovered from surface and submerged deposits. Well-preserved subfossil logs have also been recovered in quantity from buried deposits of great age, and may permit development of long continuously dated Holocene chronologies and discontinuous “floating” Pleistocene chronologies. The extensive subfossil baldcypress swamp discovered 6 m below the streets of Washington D.C. was overrun by a transgression of the Potomac estuary, possibly during the previous super interglacial (marine OIS 5e), and provides direct evidence for one potential impact of unmitigated anthropogenic warming and sea level rise.