日本海的末次盛冰期

被引：2

作者：

刘焱光 ^{[1
]}

邹建军 ^{[1
]}

李朝新 ^{[1
]}

张伟滨 ^{[1
]}

石学法 ^{[1
]}

Suk BongChool ^{[2
]}

机构：

[1] 国家海洋局第一海洋研究所,海洋沉积与环境地质国家海洋局重点实验室

[2] 韩国海洋研究与发展研究院南海研究所

来源：

海洋地质与第四纪地质 | 2009年 / 29卷 / 04期

关键词：

海平面; 东亚季风; 末次盛冰期; 日本海;

D O I：

暂无

中图分类号：

P736.22 [历史海洋学、海洋地层学];

学科分类号：

070903 ;

摘要：

日本海末次盛冰期的沉积层几乎都是以交替出现的深色纹层、浅色纹层状和均质沉积物为特征。根据日本海中部和南部两个岩心记录的末次盛冰期的沉积特征和表层海水温度变化,讨论了低海平面时期东亚季风对日本海沉积环境的控制作用。24.2～17.8cal.kaBP,日本海南部纹层沉积的分布均对应了夏季风的相对增强,表明季风降水输入是引起该时期日本海底层水含氧量变化的主要原因。在夏季风的控制下,低盐富营养的东海沿岸水的强弱变化使冲绳海槽北部表层海水温度也在24.2～17.8cal.kaBP期间出现低值并剧烈变化。30～24.2和17.8～15cal.kaBP,受增强的冬季风(夏季风减弱)影响,日本海水体的流通性较强,底层水溶解氧含量相对较高。对23～17.5cal.kaBP日本海的表层海水温度出现异常高值的原因存在很多争论,一般认为是由于季风降雨输入量大于蒸发量、表层水盐度普遍降低、水体出现密度分层、水层间的垂直交换受到限制所致。

引用

页码：53 / 63

页数：11

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