...
首页> 外文期刊>IEEE Geoscience and Remote Sensing Letters >Assessment of Recent Short-Term Water-Level Fluctuations in Caspian Sea Using Topex/Poseidon
【24h】

Assessment of Recent Short-Term Water-Level Fluctuations in Caspian Sea Using Topex/Poseidon

机译:使用Topex / Poseidon评估里海近期近期水位波动

获取原文
获取原文并翻译 | 示例
           

摘要

The Caspian Sea (CS) has long been the focus of an interest due to its large water-level fluctuations. The primary factors of the CS water-level variations have usually been deemed to changes in climatic parameters. The climate-induced changes particularly in precipitation over the Volga River catchment and evaporation over CS mainly affect the CS level (CSL). We constructed extended and refined TOPEX/Poseidon time series to compute temporal mean water-level fluctuations from December 1992 to August 2005 over CS using the new gravity recovery and climate experiment orbits data, new sea state bias model, and TOPEX microwave radiometer drift correction. Four distinct phases in water-level variations are observed: a significant water-level rise between 1993 and mid-1995 followed by an abrupt decline from mid-1995 to summer 1997, then relatively modest decrease until mid-2002 and rise from summer 2002 onward. The analysis of water budget parameters favors the recent understanding that Volga River discharge in conjunction with evaporation over CS are the two main components controlling water-level fluctuations of CS. Volga River discharge positively correlates with CS water-level rise and drop from 1993 to 1997 and in 1999, respectively. Evaporation should dominate over the Volga River runoff and primarily controls CSL fluctuations after 1997 through 2003. Additionally, we find that anthropogenic factors are insufficient to affect water-level oscillations except for reservoir development or demolition, and water-level changes during 13-year time series are temporary variations.
机译:里海(CS)由于水位大起伏,长期以来一直是人们关注的焦点。 CS水位变化的主要因素通常被认为是气候参数的变化。气候引起的变化,特别是伏尔加河流域的降水和南海的蒸发主要影响南海的水位(CSL)。我们使用新的重力恢复和气候实验轨道数据,新的海况偏差模型以及TOPEX微波辐射计漂移校正,构建了扩展和完善的TOPEX / Poseidon时间序列,以计算1992年12月至2005年8月CS上的时间平均水位波动。观察到了四个不同的水位变化阶段:1993年至1995年中水位显着上升,然后从1995年中至1997年夏季突然下降,然后直到2002年中为止相对适度的下降,并从2002年夏季开始上升。 。对水预算参数的分析有利于最近的理解,即伏尔加河流量与CS上的蒸发相结合是控制CS水位波动的两个主要因素。伏尔加河的流量分别与1993年至1997年和1999年CS水位的上升和下降呈正相关。蒸发应在伏尔加河径流中占主导地位,并主要控制1997年至2003年之后的CSL波动。此外,我们发现人为因素不足以影响水位振荡,除了水库开发或拆除以及13年内的水位变化外系列是暂时的变化。

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