The IOD-ENSO precursory teleconnection over the tropical Indo-Pacific Ocean: dynamics and long-term trends under global warming     

袁东亮  胡晓悦  徐鹏  赵霞  Yukio MASUMOTO  韩卫清 《中国海洋湖沼学报》2018,(1)

The dynamics of the teleconnection between the Indian Ocean Dipole(IOD) in the tropical Indian Ocean and El Ni?o-Southern Oscillation(ENSO) in the tropical Pacific Ocean at the time lag of one year are investigated using lag correlations between the oceanic anomalies in the southeastern tropical Indian Ocean in fall and those in the tropical Indo-Pacific Ocean in the following winter-fall seasons in the observations and in high-resolution global ocean model simulations. The lag correlations suggest that the IOD-forced interannual transport anomalies of the Indonesian Throughflow generate thermocline anomalies in the western equatorial Pacific Ocean, which propagate to the east to induce ocean-atmosphere coupled evolution leading to ENSO. In comparison, lag correlations between the surface zonal wind anomalies over the western equatorial Pacific in fall and the Indo-Pacific oceanic anomalies at time lags longer than a season are all insignificant, suggesting the short memory of the atmospheric bridge. A linear continuously stratified model is used to investigate the dynamics of the oceanic connection between the tropical Indian and Pacific Oceans. The experiments suggest that interannual equatorial Kelvin waves from the Indian Ocean propagate into the equatorial Pacific Ocean through the Makassar Strait and the eastern Indonesian seas with a penetration rate of about 10%–15% depending on the baroclinic modes. The IOD-ENSO teleconnection is found to get stronger in the past century or so. Diagnoses of the CMIP5 model simulations suggest that the increased teleconnection is associated with decreased Indonesian Throughflow transports in the recent century, which is found sensitive to the global warming forcing.The dynamics of the teleconnection between the Indian Ocean Dipole(IOD)in the tropical Indian Ocean and El Ni?o-Southern Oscillation(ENSO)in the tropical Pacific Ocean at the time lag of one year are investigated using lag correlations between the oceanic anomalies in the southeastern tropical Indian Ocean in fall and those in the tropical Indo-Pacific Ocean in the following winter-fall seasons in the observations and in high-resolution global ocean model simulations.The lag correlations suggest that the IOD-forced interannual transport anomalies of the Indonesian Throughflow generate thermocline anomalies in the western equatorial Pacific Ocean,which propagate to the east to induce ocean-atmosphere coupled evolution leading to ENSO.In comparison,lag correlations between the surface zonal wind anomalies over the western equatorial Pacific in fall and the Indo-Pacific oceanic anomalies at time lags longer than a season are all insignificant,suggesting the short memory of the atmospheric bridge.A linear continuously stratified model is used to investigate the dynamics of the oceanic connection between the tropical Indian and Pacific Oceans.The experiments suggest that interannual equatorial Kelvin waves from the Indian Ocean propagate into the equatorial Pacific Ocean through the Makassar Strait and the eastern Indonesian seas with a penetration rate of about 10%–15%depending on the baroclinic modes.The IOD-ENSO teleconnection is found to get stronger in the past century or so.Diagnoses of the CMIP5 model simulations suggest that the increased teleconnection is associated with decreased Indonesian Throughflow transports in the recent century,which is found sensitive to the global warming forcing.  相似文献   

高速公路下伏采空区地表变形预计及稳定性评价   总被引：1，自引：0，他引：1  

吴盛才  徐鹏  贺跃光 《测绘科学》2012,37(2):97-99

高速公路下伏采空区是路基路面及桥梁工程的严重隐患。高速公路下伏采空区在探测、排查的基础上,进行采空区稳定性评价,需对其地表各种变形值进行预计。本文采用概率积分法对采空区地表移动与变形值进行预计,计算并绘制出采空区主断面上的变形曲线;进而根据预计后的变形曲线,对采空区的稳定性做出准确的评价。实例预计结果表明,水平变形、地表倾斜和曲率均超过变形控制指标,采空区欠稳定,并以预计结果作为设计经济可行、技术可行的高速公路下伏采空区治理方案的依据。  相似文献   

阪神大震灾和地震预报     

深尾良夫  潘元振 《地震科技情报》1996,(11):2-2

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数码城市GIS数据浏览器的设计实现     

徐鹏  ;朱庆  ;李献明 《湖南地质》2008,(2):67-69

多种类型数据的集成应用是数码城市GIS的特色之一。稳定高效的数据调度与融合机制、逼真的可视化效果、灵活方便的场景操纵方式、简洁友好的界面是设计数码城市GIS数据浏览器时所要考虑的几个关键因素。分析了数码城市GIS数据浏览器的设计和实现方法，并针对深圳市三维景观模型数据的包装，介绍了数码城市GIS数据浏览器的应用实例。  相似文献   

“江南工程项目管理模式”内涵与践行     

郑梅深 《中国煤炭地质》2013,(8)

“江南工程项目管理模式”是广州中煤江南基础工程公司从长期施工实践中总结、归纳、提升出来的工程项目管理模式。其主要内容包括自主经营管理、项目预算管理、工程质量管理、安全生产管理和文明施工管理五个子模式。该模式的五大管理子模式,是一个有机的整体,涵盖了工程项目管理的基本内容,贯穿于工程项目管理的全过程,其内容具体明确,可操作性强。“江南工程项目管理模式”在广州市猎德村改造基坑工程项目中的典范应用,表明该模式的推行,对于提高企业的管理水平,增强企业市场竞争能力具有十分重大的现实意义。  相似文献   

日本气象厅根据东北地方太平洋近海地震改进海啸警报     

深町知宏  彭岩 《国际地震动态》2013,(5):4-7

日本气象厅在根据日本沿岸发生的地震预测海啸发生方面,是以地震发生后3min为目标,努力发布迅速准确的海啸警报和预警提示。将东北地方太平洋近海地震时发生的特大海啸灾害作为一次沉痛的教训,2013年3月,日本开始使用验证改进后的新的海啸警报。本文将介绍这次改进的内容。  相似文献   

工业硫酸镍中氨的快速光度法测定     

潘德深 《地质实验室》1995,11(4):233-233

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江西南部前泥盆系的初步认識     

张浅深  俞受鋆  黄建辉  林天瑞  廬华复  钱清 《地质学报》1964,43(4)

一、前言我国华南广大地区,主要是广东、广西、湖南、江西等地,广泛地出露一套前泥盆紀浅变貭岩系,即所謂“龙山系”。解放前,除张席禔在粤西郁南連滩一带,徐瑞麟在粤中新兴、台山一带,以及李四光等在桂北一带采到一些笔石化石以外,在广大的“龙山系”分布地区內一直沒有找到过任何化石。解放后,随着我国地貭普查勘探事业的蓬勃发展,  相似文献   

基于政府主导的城市旅游竞争力评价模型   总被引：1，自引：0，他引：1  

张补宏  伍卓深 《地理与地理信息科学》2007,23(6):105-107,111

以城市旅游目的地为研究视角,以政府主导对城市旅游发展的巨大影响为研究重点,借鉴既有关于城市旅游竞争力的评价指标与方法,探讨基于政府主导的城市旅游竞争力评价方法。利用增长率相乘法构建竞争力评价数学模型,并对模型的科学性进行论证;同时给出评议专家修正系数、不同增长率情况下的计算方式等模型完善方法,使该模型适用于对多个城市进行基于政府主导的旅游竞争力比较分析。  相似文献   

对“地层规范草案及地层规范草案说明书”的一些意见     

张浅深 《地质论评》1964,22(6):467-468

自从“地层规范草案及地层规范草案说明书”(以下简称规范及说明书)出版以来,我国地质界,对地层单位、地质时代单位、地层符号的使用和专用地层单位名称的命名等方面长期存在的混乱状况,已有了显著的改变。为了更好地总结这一文件在试行过程中的经验与问题,笔者提出如下意见,供大家讨论。  相似文献