Effects of a Dry-Mass Conserving Dynamical Core on the Simulation of Tropical Cyclones

The accurate forecasting of tropical cyclones(TCs) is a challenging task. The purpose of this study was to investigate the effects of a dry-mass conserving(DMC) hydrostatic global spectral dynamical core on TC simulation. Experiments were conducted with DMC and total(moist) mass conserving(TMC) dynamical cores. The TC forecast performance was first evaluated considering 20 TCs in the West Pacific region observed during the 2020 typhoon season. The impacts of the DMC dynamical core on forecasts o...     

Modulation of the Intensity of Nascent Tibetan Plateau Vortices by Atmospheric Quasi-Biweekly Oscillation

The modulation of the intensity of nascent Tibetan Plateau vortices(ITPV) by atmospheric quasi-biweekly oscillation(QBWO) is investigated based on final operational global analysis data from the National Centers for Environmental Prediction. The spatial and temporal distributions of the ITPV show distinct features of 10–20-day QBWO. The average ITPV is much higher in the positive phases than in the negative phases, and the number of strong TPVs is much larger in the former,with a peak that appears in phase 3. In addition, the maximum centers of the ITPV stretch eastward in the positive phases,indicating periodic variations in the locations where strong TPVs are generated. The large-scale circulations and related thermodynamic fields are discussed to investigate the mechanism by which the 10–20-day QBWO modulates the ITPV. The atmospheric circulations and heating fields of the 10–20-day QBWO have a major impact on the ITPV. In the positive QBWO phases, the anomalous convergence at 500 hPa and divergence at 200 hPa are conducive to ascending motion. In addition, the convergence centers of the water vapor and the atmospheric unstable stratification are found in the positive QBWO phases and move eastward. Correspondingly, condensational latent heat is released and shifts eastward with the heating centers located at 400 hPa, which favors a higher ITPV by depressing the isobaric surface at 500 hPa. All of the dynamic and thermodynamic conditions in the positive QBWO phases are conducive to the generation of stronger TPVs and their eastward expansion.     

Changes in wheat potential productivity and drought severity in Southwest China

Theoretical and Applied Climatology - Wheat production in Southwest China (SWC) plays a vital role in guaranteeing local grain security, but it is threatened by increasingly frequent seasonal...     

地震灾害情景下产业空间网络风险评估——以日本丰田汽车为例

以日本东南海地震为情景,以日本丰田汽车及其关联企业为例,基于工厂个体数据及其部件供应的拓扑和空间网络,模拟灾害风险在产业网络中扩散转移过程,建立直接损失与间接功能损失的评估模型,为产业空间网络风险评估提供新的思路和方法借鉴。结果表明：在东南海地震情景下,丰田汽车约48.1%的工厂将直接受损,其中生产设施损失约5587亿日元,厂房建筑损失约1980亿日元。由于关键工厂受损,将间接导致整个产业网络中断。在最长37日恢复情景下,将造成约9230亿日元的间接功能损失。地震灾害对丰田汽车产业网络影响显著,有必要采取有效措施进行减灾降险。     

用灰色系统理论分析南京东郊岩溶水源地地下水动态

以灰色关联分析的方法对地下水动态进行研究是可行的,能为水源地地下水动态的控制指出方向,为地下水资源的合理开发、利用提供科学依据。      

内蒙古东部半干旱草原残丘景观区铜多金属元素表生地球化学异常特征及其评价指标体系的构建

分析了研究区内钙积层、风成沙等制约因素对铜多金属元素表生地球化学异常发育的影响,总结了该类特殊景观条件下铜多金属元素表生地球化学异常特征及其在垂向和侧向上的迁移规律。在此基础上,构建了该类景观区铜多金属元素的表生地球化学异常评价指标体系     

兰坪盆地遥感地质及化探综合分析在成矿预测中的应用

在遥感图像目视解译的基础上,对兰坪盆地的线性构造和环形构造做了详细定量分析,结合已知矿床（ 点） 分布及地球化学异常分析,圈定出了４ 个最有利的成矿远景区,这对进一步研究和指导该区找矿十分有用。     

华北地台东部古生代与新生代岩石圈地幔特征及其演化

古生代含金刚石及捕虏体的金伯利岩和新生代含捕虏体的玄武岩先后共同侵位于华北地台东部,提供了研究自古生代以来板内岩石圈地幔特征及其演化的深源岩石探针。通过对古生代与新生代,新生代时郯庐断裂带内与带外岩石圈地幔物质之间岩相学,岩石和矿物的主元素,微量元素,地幔热状态的对比研究,结合现代地球物理资料,建立了以新生地幔物质对古老岩石圈置换作用为主的华北地台东部地幔减薄模型。该模型强调,古老岩石圈地幔业已成     

N—间甲苯基—N‘—（对氨基苯磺酸钠）硫脲与铜的显色反应及应用

研究了新试剂N-间甲苯基-N'-(对氨基苯磺酸钠)硫脲(MMPT)与Cu2+的显色反应.结果表明,在pH 4.6～5.6的HAc-NaAc介质中,Cu2+与MMPT形成的配合物至少稳定5 h,其λmax=370 nm,表观摩尔吸光系数为1.12×105 L.mol-1.cm-1.Cu2+的质量浓度在0.08～1.4 mg/L时符合比尔定律,相关系数r=0.9991.方法简便、快速,用于铅矿中铜的分析,测定结果与监控样推荐值相符,对w(Cu)=0.8%的试样测定6次,RSD=3.2%.     

青金石中有序结构畴与无序结构畴交生的畴结构新类型

在黝方石、蓝方石的青金石等富含（ＳＯ４）＾２－的方钠石族矿物的有序结构中,常见有沿着一个或几个方向的结构调制,并还常伴随出现反相畴、双晶畴等畴结构。通过透射电镜研究,作者在产于俄罗斯南贝加尔的青金石中,观察了到了一种由尺度都很小（长径约在１０ｎｍ以内）的有序结构畴与无序结构畴相互交生的畴结构新类型。其畴界弈曲而不规则,但相邻畴的晶格都是相互连续而完全共格的。这种畴结构是由无序青金石在其有序化过程的