...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Geophysical Research Letters >Synoptic controls upon delta O-18 in southern Tasmanian precipitation
【24h】

Synoptic controls upon delta O-18 in southern Tasmanian precipitation

机译：塔斯马尼亚南部降水对O-18的天气控制

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

An event-based record of O-18 in precipitation at Margate in Tasmania, Australia, was analysed using 3d Lagrangian trajectories and composites of ERA40 850hPa geopotential height for the years 1994-2002. Trajectory analysis found that moisture entrainment occurs during the 48 hour period prior to arrival for all precipitating air masses at Margate. The rate of entrainment was greatest for events of high rainfall/high depletion, contributing up to 19% of vapour in the air mass in summer and up to 47% in winter. The majority of air masses were found to be advected from the Southern Ocean, however, for high rainfall/high depletion events during summer 30% of air masses were found to approach from the Tasman Sea (east of 155E longitude). Mean isotope ratios were less depleted by 1.4% for these events indicating mixing with less depleted air. High rainfall/high depletion events were also associated with negative geopotential anomalies east of Tasmania.
机译：使用3d拉格朗日轨迹和ERA40 850hPa地势高度的复合物，分析了1994-2002年澳大利亚塔斯马尼亚州马盖特市降水中O-18的事件记录。弹道分析发现，所有降水气团到达马盖特之前，水分夹带发生在到达前的48小时内。对于高降雨/高耗竭的事件，夹带率最大，夏季占空气中蒸气的19％，冬季占47％。发现大部分气团来自南大洋，但是，在夏季高降雨/高耗竭事件中，有30％的气团从塔斯曼海（东经155E）接近。对于这些事件，平均同位素比减少了1.4％，表明与减少的空气混合。高降雨/高耗竭事件也与塔斯马尼亚岛东部的负地势异常有关。

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