Late Quaternary Climate Records from the Northern Red Sea: Results on Gravity Cores Retrieved during the R/V METEOR Cruise M44/3
Late Quaternary Climate Records from the Northern Red Sea: Results on Gravity Cores Retrieved during the R/V METEOR Cruise M44/3
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DOI：
10.4197/mar.12-1.7
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
H. Arz;M. Moammar;S. Arabia
中科院分区：
文献类型：
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作者：
H. Arz;M. Moammar;S. Arabia
我们介绍了1999年春季R/V流星巡航M44/3期间，从沙特阿拉伯海岸到红海北部中轴的三个剖面上获取的沉积岩芯获得的高分辨率海洋古气候记录。由于红海北部狭小、沙漠环绕的地理位置，过去出现了极端的海洋变化，导致海洋沉积物中的淡气候信号被放大。风吹和河流输送的陆源物质的持续沉积为邻近大陆的干旱变化提供了高时间分辨率。这种变化是由独立的指标记录的，即块状沉积物化学(通过剖面XRF测量确定的铁和钛含量)和磁化率的变化。同时，海洋环境的变化也反映在碳酸盐含量的变化上(即钙和锶的强度)。我们的记录提供了近东干旱变化和红海北部古海洋条件与全球气候和海平面变化以及季风系统变化的强烈耦合的证据。
We present high-resolution marine paleoclimate records obtained from sediment cores retrieved along three profiles extending from the Saudi Arabian coast to the central axis of the northern Red Sea during R/V METEOR cruise M44/3 in spring 1999. Because of its restricted, desert surrounded location, the northern Red Sea suf- fered extreme oceanographic changes in the past, resulting in an amplification of pale- oclimatic signals in the marine sediments. The continuous deposition of wind-blown and fluvially transported terrigenous material provides a high temporal resolution of changes in the aridity of the adjacent continents. Such changes are documented by in- dependent indicators, i.e., variations of the bulk-sediment chemistry (Fe- and Ti- content determined by profiling XRF measurements) and magnetic susceptibility. Synchronously, changes in the marine environment are reflected by variations in the carbonate content (i.e., Ca- and Sr-intensities). Our records provide evidence of a strong coupling of both aridity changes in the Near East and paleoceanographic condi- tions in the northern Red Sea to global climate and sea level changes as well as varia- tions in the monsoonal system.