• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Current Science: A Fortnightly Journal of Research >High resolution Holocene monsoon records from different proxies: Anassessment of their consistency
【24h】

High resolution Holocene monsoon records from different proxies: Anassessment of their consistency

机译：来自不同代理的高分辨率全新世季风记录：对其一致性的评估

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Available high resolution quantitative monsoon reconstructions for the Holocene period in the Indian region are compared to assess for consistency among the proxy records. There is a good concordance among three different monsoon proxies from western India: (a) Pollen-based reconstruction of annual rainfall in Rajasthan from a sediment core in lake Lunkaransar, (b) stable carbon isotope variations in organic carbon from another core from the same lake, and (c) stable oxygen isotopic variations in surface-dwelling foraminifera from a sediment core in the coastal eastern Arabian Sea. While this is reassuring, the degree of concordance diminishes when records from widely separated sites in the Indian region are compared. Possible causes for this inconsistency are discussed, perhaps the most important among them being the large spatial variations in monsoon rainfall over the Indian region, apparent in modern instrumental records. There is a need to assess the temporal variance of this geographical variability before multiproxy quantitative monsoon rainfall reconstructions can be integrated as a single time series (somewhat akin to the modern All India Summer Monsoon Rainfall time series compiled by the India Meteorological Department). Such an effort can serve to test and improve palaeoclimate/palaeomonsoon models.
机译：比较印度地区全新世时期的高分辨率高分辨率季风重建，以评估代理记录之间的一致性。来自印度西部的三个不同的季风代理之间有很好的一致性：（a）基于花粉的重建，从伦卡兰萨尔湖的沉积核中拉贾斯坦邦的年降水量;（b）来自另一个核心的有机碳的稳定碳同位素变化湖，以及（c）阿拉伯东部沿海沿海沉积物表面的有孔有孔虫中稳定的氧同位素变化。尽管这令人放心，但将印度地区广泛分布的站点的记录进行比较时，一致性程度会降低。讨论了这种不一致的可能原因，也许其中最重要的是现代工具记录中明显显示的印度地区季风降雨的大空间变化。在将多代理定量季风降雨重建方法整合为单个时间序列之前，有必要评估这种地理变异的时间变化（与印度气象部门编制的现代“全印度夏季风降雨时间序列”有些相似）。这样的努力可以用来测试和改善古气候/古季风模型。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号