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Global analysis theory of climate system and its applications

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chinese Science Bulletin 2003年第10期48卷 1034-1039页

作者： li jianping1,2.& {2. jifan2.3 1. lasg, institute of atmospheric physics, chinese Academy of sciences, beijing 10002., china 2. Department of atmospheric sciences, Lanzhou University, Lanzhou 730000, china 3. Training Center for china Meteorological Administration, beijing 100081, china lasg Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China Department of atmospheric sciences Lanzhou University Lanzhou 730000 China Training Center for china Meteorological Administration Beijing 100081 China

The idea and main theoretical results of the global analysis theory of climate system are briefly summarized in this paper. A theorem on the global behavior of climate system is given, i.e. there exists a global attractor in the dynamical equations of climate, any state of climate system will be evolved into the global attractor as time increases, indicating the nonlinear adjustment process of climate system to external forcing. The different effects of external forcing, dissipation and nonlinearity on the long-term behavior of solutions are pointed out, and some main applications of the global analysis theory are also introduced. Especially, three applications, the adjustment and evolution processes of climate, the principle of numerical model design and the optimally numerical integration, are discussed.

关键词：整体分析理论气侯体系应用不定性计算法则气侯科学数字模型

Operator constraint principle for simplifying atmospheric dynamical equations

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chinese Science Bulletin 2001年第12期46卷 1053-1056页

作者： li jianping & {2. jifan1. National Key Laboratory of atmospheric sciences and Geophysical Fluid Dynamics (lasg), institute of atmospheric physics, chinese Academy of sciences, {12. 10002., china 2. Department of atmospheric sciences, Lanzhou University, Lanzhou 730000, china National Key Laboratory of atmospheric sciences and Geophysical Fluid Dynamics ({2.) Institute of Atmospheric Physics Chinese Academy of Sciences Beijing China Department of atmospheric sciences Lanzhou University Lanzhou China

Based on the qualitative theory of atmospheric dynamical equations, a new method for simplifying equations, the operator constraint principle, is presented. The general rule of the method and its mathematical strictness are discussed. Moreover, the way that how to use the method to simplify equations rationally and how to get the simplified equations with harmonious and consistent dynamics is given.

关键词： simplification operator equation operator constraint principle.

Large-scale low-frequency rainfall regimes and their transition modes in summertime over china

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chinese Science Bulletin 2006年第11期51卷 1355-1367页

作者： REN Hongli ZHANG Peiqun chou {2. li Weijing GAO li College of atmospheric sciences Lanzhou University Lanzhou 730000 China Laboratory for Climate Studies National Climate Centre China Meteorological Administration Beijing 100081 China lasg Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China

Seven large-scale low-frequency rainfall regimes (LFRRs) in summertime are identified for china in a 10-dimensional phase space by using a 40-year daily precipitation dataset. Corresponding to the local extrema of observed probability density in phase space, the LFRRs are characterized by the persistence and transitions that reflect the spread and jump features of low-frequency rainfall centers. The LFRRs are generally consistent with summer monsoon rainbelts on the intraseasonal timescale, and there exist the preferred transition relationships between the LFRRs. Four LFRRs’ transition modes (LFRRTMs), which are the dominant components of the interannual and intraseasonal variability of sum- mer rainfall in china, are further induced. Analyses of atmospheric circulation system show that the anomalies of the subtropical high over the western Pacific (SHWP) and blockings in mid-high latitudes, the low-latitude circulation anomalies, and the wavetrains over the East Asia-Pacific region (EAPWs), play crucial roles in the occurrence and transitions of the LFRRs. Moreover, the evolution of the SHWP and blockings, the distribution and movement of the EAPWs, and the intraseasonal variability of the East Asian-Pacific jet stream may be principal factors of the formations of the LFRRTMs.

关键词：夏季降雨相空间低频降雨体系大尺度预报

铵离子筛NaZn_(1.5)Fe(CN)_(6)的制备及选择性脱铵研究

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水处理技术 2021年第9期47卷 67-70,80页

作者：莫恒亮陈亦力文剑平俞开昌丑树人李锁定北京碧水源膜科技有限公司北京101400 北京碧水源科技股份有限公司北京102206

以亚铁氰化钠、硫酸锌为原料,在常温常压下,利用沉淀法合成了对NH_(4)^(+)具有高选择性、吸附容量大且循环性好的铵离子筛NaZn_(1.5)Fe(CN)_(6)。采用聚丙烯腈作为粘结剂将NaZn_(1.5)Fe(CN)_(6)粉体成型造粒后,将铵离子筛颗粒填柱并用... 详细信息

以亚铁氰化钠、硫酸锌为原料,在常温常压下,利用沉淀法合成了对NH_(4)^(+)具有高选择性、吸附容量大且循环性好的铵离子筛NaZn_(1.5)Fe(CN)_(6)。采用聚丙烯腈作为粘结剂将NaZn_(1.5)Fe(CN)_(6)粉体成型造粒后,将铵离子筛颗粒填柱并用于市政污水的脱铵。针对氨氮质量浓度为45 mg/L的进水,吸附柱穿透前(将产水氨氮质量浓度>1 mg/L视为穿透),产水氨氮质量浓度稳定且小于1 mg/L(达地表Ⅲ类水体标准),穿透时对氨氮的吸附容量为2. mg/g,材料可循环使用750次以上。NaZn_(1.5)Fe(CN)_(6)对于NH_(4)^(+)的选择性吸附,主要是由于铵离子筛与NH_(4)^(+)存在两种效应:一是铵离子筛孔道尺寸与NH_(4)^(+)大小共同匹配所形成的空间尺寸效应,二是NH_(4)^(+)结构中的氢原子与铵离子筛骨架中氮原子作用形成的氢键效应。

关键词：市政污水氨氮处理铵离子筛选择性吸附离子交换