MOLECULAR STRATIGRAPHY OF THE SANTA-BARBARA BASIN - COMPARISON WITH HISTORICAL RECORDS OF ANNUAL CLIMATE CHANGE

被引：26

作者：

KENNEDY, JA

BRASSELL, SC

机构：

[1] Department of Geology, Stanford University, Stanford

来源：

ORGANIC GEOCHEMISTRY | 1992年 / 19卷 / 1-3期

基金：

美国国家科学基金会;

关键词：

ALKENONES; STEROLS; DINOFLAGELLATES; EL NINO; PALEOCLIMATE;

D O I：

10.1016/0146-6380(92)90040-5

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

The molecular record of 20th Century climatic variability in laminated sediments of the Santa Barbara basin has been compiled. Distributions and abundance profiles of alkenones and selected sterols reveal annual oscillations in sea surface temperatures and phytoplankton productivity. Positive excursions in alkenone temperature profiles coincide with all major 20th Century El Nino events recording oceanic warming. Downcore abundance profiles for dinosterol, brassicasterol, cholesterol and alkenones reflect productivity trends in phytoplankton and illustrate the comparative resilience of their molecular records. Series of subsurface concentration maxima for dinosterol, a dinoflagellate-derived sterol, appear synchronous with regional historical reports of dinoflagellate blooms.

引用

页码：235 / 244

页数：10

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