【摘 要】
：
On multi time-scale of intraseasonal,interannual and interdecadal,soil moisture is the dominant land surface parameter affecting the global atmosphere.As there is a limit for climate prediction,intera
【机 构】
：
Key Laboratory of Regional Climate-Environment Research for East Asia,Institute of Atmospheric Physi
【出 处】
：
第一届中国大地测量和地球物理学学术大会
论文部分内容阅读
On multi time-scale of intraseasonal,interannual and interdecadal,soil moisture is the dominant land surface parameter affecting the global atmosphere.As there is a limit for climate prediction,interannual variability of seasonal mean fields arising from variability within the season is essentially unpredictable on seasonal,or longer time scales.A variance decomposition method could estimate the signal of intraseasonal (unpredictable) and predictable (slow) component,respectively.This methodology provides a way to better identify and understand the source of predictable skill as well as the sources of uncertainty in climate variability.In this study,the Community Land Model (CLM3.5) was used to simulate regional soil moisture in China during 1958-2010 with the atmospheric forcing field constructed from station observations.Based on the variance decomposition method,the seasonal potential predictability of soil moisture in China mainland was given,the spatial patterns of predictable and unpredictable component were identified,the predictors for seasonal soil moisture and their possible mechanisms were discussed.Furthermore,seasonally predictable and unpredictable modes of soil moisture simulated by Coupled Model Intercomparison Project (CMIP5) were assessed,and projected changes of soil moisture were given.
其他文献
由于青藏高原生态脆弱性，青藏高原鼠兔和鼢鼠对生态环境的影响受到广大科研人员的关注。本研究通过野外调查取样，实验室样品分析为主要手段，分析了黄河源区，疏勒河源区等地鼠洞和鼠丘对土壤水分和土壤硬度的影响。结果表明，鼠洞和鼠丘会导致土壤层水分减少、土壤硬度变小，同一样地，原状的土壤水分含量最高、土壤硬度最大，其次为旧鼠洞和旧鼠丘、新鼠洞和新鼠丘。本研究结果表明，青藏高原鼠洞和鼠丘对土壤水分和土壤硬度具有
地震学是研究固体地球的重要地球物理学科，地震海洋学则把地震学的研究对象拓展到流体地球-海洋。地震海洋学作为一门新兴的交叉学科，具有高横向分辨率、短时间内对整个海水剖面进行成像和已有巨量反射地震数据的优势，可望在物理海洋学、海洋地质学领域获得广泛应用，对海洋学发展产生深远影响。如同海气界面，海底作为重要的圈层间(水圈与固体圈/岩石圈)的大间断面，必定是重要的界面。研究海底的界面过程应该是非常有意义的
Using different SST datasets,the variability of zonal mean SSTs is investigated.Besides the global warming mode,the variability is dominated by one equatorially symmetric mode and one antisymmetric mo
对机载应用来说，确定载体加速度的三种基本方法是位置求导法、相位差分法、多普勒频移法，这三种方法都需要通过差分运算才能得出载体的加速度。牛顿中心差分器是运用最为广泛的一类差分器，其关键在于点数的选取。利用牛顿中心差分器进行GPS定速和确定载体加速度时，主要误差分为截断误差和传播误差两类，有分析认为牛顿中心差分器的最佳点数应使截断误差与观测误差之和最小，但这一结论是在全频谱范围内进行考虑的，适合于航空
The variation and control of soil organic carbon (SOC) and other nutrients in permafrost regions are critical for studying the carbon cycle and its potential feedbacks to climate change; however,they
本研究试图从大气热源的角度,分析东亚夏季风减弱中大气热源异常的作用及其与热带印太海盆增暖的关系,通过找出关键热源异常及其来源,理解热带印太海盆增暖通过大气热源异常影响东亚夏季风年代际减弱的机制。利用ERA40再分析资料通过倒算法计算夏季大气热源,从而诊断其变率,并利用模式和统计方法探讨其与东亚夏季风减弱的配置关系,及其与海温之间的关系。结果表明,随着东亚夏季风减弱,大气热源在70年代末发生了年代际
卫星遥感技术是确定火山灰云位置及其范围的重要手段。通常利用极轨卫星搭载的中高分辨率光谱扫描仪例如MODIS,对火山灰云进行多光谱计算识别并可进一步估算其载量和高度。相比而言,静止卫星观测光谱波段少并且光谱分辨率低,因此目前较少应用于火山灰云监测。然而,考虑到静止卫星拥有极轨卫星无法提供的高频次观测的显著优点,因此研究使用静止卫星监测火山灰云仍然具有实际应用价值。本文研究利用FY2 静止气象卫星进行
Better understanding the long-term historical trends of atmospheric mercury (Hg) deposition is critical to assess the regional and global impact of anthropogenic Hg emissions.An ice core (Mt.Geladaind
A 147 m ice core was drilled from Guoqu Glacier ( 33.58°N,91.18°E,5750 m a.s.l.) during the Sino-US cooperation expedition of Mt.Geladaindong in the central Tibetan Plateau (TP).Here we investigate th
“中国大陆构造环境监测网络”(简称“陆态网络”)是一套由多种现代空间对地观测手段(GPS、VLBI、SLR、InSAR等)与传统地面大地测量技术相结合的地球科学综合观测系统，它以监测地壳运动、服务地震预测为主，其高质量、高采样的260个连续运行基准站观测数据能够有效分辨3-5mm量级的地壳形变。