The Flower Garden Banks Siderastrea siderea coral as a candidate Global boundary Stratotype Section and Point for the Anthropocene series
The Flower Garden Banks Siderastrea siderea coral as a candidate Global boundary Stratotype Section and Point for the Anthropocene series
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DOI：
10.1177/20530196221147616
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发表时间：
2023-02
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通讯作者：
K. Delong;Kylie Palmer;A. Wagner;Mudith M. Weerabaddana;N. Slowey;A. Herrmann;N. Duprey;A. Martínez-García;Jonathan Jung;I. Hajdas;N. Rose;S. Roberts;L. Roberts;A. Cundy;P. Gaca;J. Andrew Milton;Handong Yang;S. Turner;Chun‐Yuan Huang;Chuan‐Chou Shen;J. Zinke
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作者：
K. Delong;Kylie Palmer;A. Wagner;Mudith M. Weerabaddana;N. Slowey;A. Herrmann;N. Duprey;A. Martínez-García;Jonathan Jung;I. Hajdas;N. Rose;S. Roberts;L. Roberts;A. Cundy;P. Gaca;J. Andrew Milton;Handong Yang;S. Turner;Chun‐Yuan Huang;Chuan‐Chou Shen;J. Zinke
拟议的人类世全球边界层型剖面和点（GSSP）候选地点西花园岸（27.8762°N，93.8147°W）是墨西哥湾的一个开阔海洋位置，有一个淹没的珊瑚礁，几乎没有直接的人类影响。珊瑚具有高度准确和精确（<±1年）的内部年表，类似于树木的年轮，它们的外骨骼由文石组成，可以保存在岩石记录中。在这里，我们提出了一个大型Siderastrea siderea珊瑚（核心05 WFGB 3; 1755-2005 CE）采样的年度和月度分辨率，显示全球和区域的人类影响的明确标志的结果。大气核弹试验的副产物（14 C，239+ 240 Pu）在1957年开始明显增加，1956年首次增加239+ 240 Pu（人类世GSSP的潜在基础）。珊瑚的δ 13 C下降，特别是在1956年之后，与化石燃料燃烧造成的苏斯效应一致。珊瑚骨骼δ 15 N在1963年开始增加，与农业肥料的增加相对应。珊瑚中的汞浓度（1933-1980年）与工业污染的波动有着大致的联系，1947年以后近海石油作业扩大时，珊瑚中的Ba/Ca值在1965-1983年期间有所增加。珊瑚温度代理包含20世纪全球变暖趋势，而珊瑚生长在此期间下降。
The proposed Anthropocene Global Boundary Stratotype Section and Point (GSSP) candidate site of West Flower Garden Bank (27.8762°N, 93.8147°W) is an open ocean location in the Gulf of Mexico with a submerged coral reef and few direct human impacts. Corals contain highly accurate and precise (<±1 year) internal chronologies, similar to tree rings, and their exoskeletons are formed of aragonite and can be preserved in the rock record. Here we present results from a large Siderastrea siderea coral (core 05WFGB3; 1755–2005 CE) sampled with annual and monthly resolutions that show clear markers of global and regional human impacts. Atmospheric nuclear bomb testing by-products (14C, 239+240Pu) have clear increases in this coral starting in 1957 for 14C and the first increase in 1956 for 239+240Pu (potential bases for the Anthropocene GSSP). Coral δ13C declined especially after 1956 consistent with the Suess effect resulting from the burning of fossil fuels. Coral skeletal δ15N starts to increase in 1963 corresponding with the increase in agricultural fertilizers. Coral Hg concentrations (1933–1980) loosely track fluctuations in industrial pollution and coral Ba/Ca increases from 1965–1983 when offshore oil operations expand after 1947. Coral temperature proxies contain the 20th-century global warming trend whereas coral growth declines during this interval.