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The effects of different sea surface temperature distributions over the western Pacific on the summer monsoon properties

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Acta Oceanologica Sinica 1993年第4期12卷 535-547页

作者： qian yongfu {2. of atmospheric Sciences, nanjing university, nanjing 2.0008, china Dept. of atmospheric Sciences Nanjing Univ. Nanjing 21008 China. China

A modified and improved primitive equation numerical model with p-sigma incorporated vertical coordinates is used to simulate the effects of different sea surface temperature distributions over the western Pacific on the summer monsoon properties. The different sea surface temperature (SST) distributions are automatically generated in the time integrations by using two different SST models, one of which is called the deep ocean model (DOM) and the other the shallow ocean model (SOM). The SST generated by the DOM has the distribution pattern of the initial SST which is similar to the pattern in the cold water years over the western Pacific, while the SST generated by the SOM has the pattern similar to that in the warm water years. The differences between the experimental results by using DOM and SOM are analyzed in detail. The analyses indicate that the most basic and important characteristics of the summer monsoon climate can be simulated successfully in both experiments, that means the climatic properties in the monsoonal climate regions are mainly determined by the seasonal heating, the contrast between the land and the sea, the topography, and the physical properties of the underlying surfaces. However, the differences between the two experiments tell us that the climatic properties in the summer monsoon regions in the cold water year and the warm water year do differ from each other in details. In the warm water year, the thermal contrast between the land and the sea becomes weaker. Over the warm water area, the upward motions are induced and the dynamical conditions favorable for the convective activities are formed, the Somali low-level cross equatorial current is somewhat weakened, while the cross equatorial currents, east of 90°E, are strongly strengthened, the precipitation amount in the tropical regions largely increases, and the precipitation over the coastal regions increases, too. However the precipitation over the southeast china and its coastal area d

关键词： Sea surface temperature anomaly monsoon climate modelling computational models of SST

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Covarying modes of the Pacific SST and northern hemispheric midlatitude atmospheric circulation anomalies during winter

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Progress in Natural Science:Materials International 2008年第10期18卷 1261-1270页

作者： Yimin Zhu~(a,b,*) Xiuqun Yang~a qian Xie~b Yongqiang Yu~c ~a {2. of A tmospheric Science,nanjing university,nanjing 2.0093,china ~b Institute of Meteorology,PLA university of Science and Technology,nanjing 2.1101,china ~c LASG,Institute of atmospheric Physics,Chinese Academy of Sciences,Beijing 10002.,china department of atmospheric Science Nanjing University Nanjing 210093 China Institute of Meteorology PLA University of Science and Technology Nanjing 211101 China LASG Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China

The interannual-to-interdecadal relationship between the Pacific sea surface temperature (SST) and the northern hemispheric midlati- tude’s atmosphere represented by the circumpolar vortex was documented with the global oceanic and atmospheric reanalysis data of recent 50 *** covarying modes of the Pacific SST and northern circumpolar vortex anomalies during winter were examined using the sin- gular value decomposition and wavelet analysis *** is the interannual,ENSO-related mode and the other is the interdecadal, North Pacific SST-related mode with a period of around 2. *** two modes exhibit distinct spatial *** the interannual mode,the SST anomaly is characterized by a typical ENSO pattern with the principal signature in the tropical eastern Pacific and secondary one in the central North Pacific,while the atmospheric anomaly is regional,characterized by a Pacific-North American *** the inter- decadal mode,large SST anomaly is located in the central North Pacific,while the atmospheric anomaly is zonally global,associated with the midlatitute’s standing long-wave *** the central North Pacific is colder,the long-wave is stronger,and vice *** investigations suggest that the interdecadal mode could involve an interaction between "two oceans and an atmosphere".

关键词： Sea surface temperature atmospheric circulation ENSO Decadal variability

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Frontal genesis of moisture atmosphere during the early 2.08 persistent freezing-rain event in southern china

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Science china Earth Sciences 2010年第3期53卷 454-464页

作者： qian WeiHong1 & FU JiaoLan1,2.1 department of {2. Sciences, School of Physics, Peking university, Beijing 100871, china 2.National Meteorological Center of CMA, Beijing, 100081, china department of atmospheric Sciences School of Physics Peking University Beijing China National Meteorological Center of CMA Beijing China

From January 10 to February 2. 2.08, a severe and persistent freezing-rain event occurred in southern and southwestern china. Here we use an observational analysis to compare the persistent freezing-rain event in the early 2.08 with the winter precipita- tion in the late 2.07 over south of the Yangtze River (Jiangnan). The persistent freezing-rain event was directly linked to the activity of quasi-stationary front. The gradient of equivalent temperature (ET) can well indicate the frontal genesis of moist atmosphere (moisture front) and its activity as well as its relationship with precipitation belt. The precipitation types (snow and freezing rains) are related to the vertical structure of moisture front. The inversion profile of ET vertical distribution is a typical synoptic condition that caused the freezing-rain event. The horizontal gradient of ET with a criterion of 10℃ / 100 km, which reflects the accumulation and release of atmospheric energy, can be applied to predict the precipitation 5-10 days in advance.

关键词： freezing-rain event frontal genesis extended-range weather forecast winter Jiangnan

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THE EFFECTS OF SEA SURFACE TEMPERATURE OVER THE EQUATORIAL WESTERN PACIFIC AND THE INDIAN OCEAN ON THE ASIAN SUMMER MONSOON

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Acta meteorologica Sinica 1989年第3期3卷 375-394页

作者：倪允琪钱永甫林元弼 department of atmospheric Sciences Nanjing University Nanjing

In this paper, the p-σ five layer primitive equation model segmented by mountains and physical parameterizations including short wave radiation; long wave radiation; large-scale and convective condensation; heat and moisture transport from surface to the first model level is used. The horizonial resolution is 5° lat. ×5° long. with the integration region from 2.°S to 55°N and from 5°W eastward to 175°W. The model was spun up with perpetual June boundary conditions and forcing starting with June zonal mean heights and geostrophic wind field. In order to investigate the effects of SST (sea surface tempefuture) over the equatorial Western Pacific and the Indian Ocean on the Asian summer monsoon, four sets of numerical experments with positive anomalies over the equatorial Western Pacific, and positive and negative anomalies over the Western Indian Ocean, and zonal mean SST (the control case) are performed. The experimental results show that the South Asian low in the lower troposphere and the anticyclone over the South Asia in the uppet troposphere intensified when positive SST anomalies over the equatorial Western Pacific is included. A statistical test method for simulations is proposed. Finally, the influence mechanism of the SST anomalies over the equatorial oceans is discussed. It is worth stressing that the effects of the SST over the equatorial oceans on the Asian summer monsoon can arise as a result of interaction of SST anomalies, atmospheric flow field and heat sources and sinks in the atmosphere.

关键词： over SSTA THE EFFECTS OF SEA SURFACE TEMPERATURE OVER THE EQUATORIAL WESTERN PACIFIC AND THE INDIAN OCEAN ON THE ASIAN SUMMER MONSOON Nino NEI MSI

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Paleoenvironmental records from the northern South china Sea since the Last Glacial Maximum

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Acta Oceanologica Sinica 2010年第3期29卷 46-62页

作者： GE qian CHU Fengyou XUE Zuo LIU J Paul DU Yuansheng FANG Yinxia Faculty of Earth Sciences China University of Geosciences Wuhan 430074 China Key Laboratory of Submarine Geosciences State Ocean Administration Hangzhou 310012 China department of Marine Earth and Atmospheric Sciences North Carolina State University Raleigh NC 27695 USA

Core ZHS-176 contains the paleoenvironmental records from the northern South china Sea （NSCS） since the Last Glacial Maximum （LGM）. A coupled approach based on clay mineral assemblages, planktonic foraminiferal oxygen and carbon isotopes, and calcium carbonate content is used to trace the sources of the fine-grained sediment and to investigate the paleoenviornmental evolution in this area. Clay mineral assemblages are dominated by illite （average about 39%） and chlorite （about 2.%）, which comes mainly from Taiwan and the East china Sea. Kaolinite, which accounts for about 13%, comes mainly from the Zhujiang （Pearl） River, and Luzon Island is the main source for smectite （about 2.%）. The planktonic foraminiferal oxygen isotopic oscillations during the last glacial period are coeval with climate variations recorded in the Greenland ice core and Western Pacific sediment. These variations include the LGM, Heinrich event 1, Bφlling-Allerφd （B/A）, and Younger Dryas. For the Holocene, three periods of strong precipitation （S1-S3） and three periods of weak precipitation （W1-W3） are identified. The oxygen isotopic record exhibits corre-lation with climate records from distant regions, including the high-latitude Northern Hemisphere, providing evidence for global tele-connection among regional climate. A brief, negative planktonic foraminiferal carbon isotopic excursion during B/A reflects increased methane released from marine gas hydrate due to the rapid warming of the water. By comparing calcium carbonate content curves of the core ZHS-176 with these of other five boreholes lying above the lysocline, a remarkable low calcium carbonate event is found during the early Holocene in NSCS.

关键词： clay mineral oxygen and carbon isotopes calcium carbonate content South china Sea paleoenvironmental evolution

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两层简单斜压海洋模式及冬、夏季平均海流模拟

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海洋学报 1999年第3期21卷 30-39页

作者：杨波钱永甫南京大学大气科学系南京210093

设计了一个两层简单斜压海洋模式（H1=501，H1＋H2.2.0m），利用1月和7月多年平均的海平面气温场、海平面气压场和由该气压场诊断出的海面风场，对此模式的性能进行了检验．结果表明，模拟得出的冬、夏季海洋表层及次表层流与实况较为... 详细信息

设计了一个两层简单斜压海洋模式（H1=501，H1＋H2.2.0m），利用1月和7月多年平均的海平面气温场、海平面气压场和由该气压场诊断出的海面风场，对此模式的性能进行了检验．结果表明，模拟得出的冬、夏季海洋表层及次表层流与实况较为一致．

关键词：海洋环流模式数值模拟短期气候模拟平均海流

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上海城郊夏季VOCs变化特征及其对O_(3)污染的贡献分析

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环境科学 2024年第8期45卷 4440-4447页

作者：王茜上海市环境监测中心上海200235 复旦大学环境科学与工程系上海200438

为深入了解夏季大气挥发性有机物(VOCs)对O_(3)污染的影响,基于上海城郊点位VOCs、O_(3)以及气象要素的在线监测数据,开展O_(3)污染时段VOCs的变化特征和活性贡献分析,研究关键气象要素和气团传输对O_(3)和VOCs的影响.结果表明,上海城... 详细信息

为深入了解夏季大气挥发性有机物(VOCs)对O_(3)污染的影响,基于上海城郊点位VOCs、O_(3)以及气象要素的在线监测数据,开展O_(3)污染时段VOCs的变化特征和活性贡献分析,研究关键气象要素和气团传输对O_(3)和VOCs的影响.结果表明,上海城郊夏季大气φ(VOCs)小时平均值为(2..91±9.82.×10^(-9),各组分构成最大的是烷烃和OVOCs,占比均为30.2..O_(3)污染日φ(VOCs)平均值为(2..84±9.69)×10^(-9),较清洁日上升2..1%.污染日VOCs的OFP为12..9μg·m^(-3),较清洁日上升31.9%,其中烯烃OFP贡献率明显上升,丙烯和丙酮等物种较清洁日偏高最多,说明以上组分和物种需要重点加强管控.乙烷和乙炔的比值(E/E)和间/对-二甲苯与乙苯比值(X/E)的变化特征表明:上海城郊地区夏季气团存在明显的区域传输影响,且主要出现在下午和夜间.污染玫瑰图和气团后向轨迹研究结果表明,来自偏南和西南方向的气团对上海城郊VOCs体积分数的传输影响最大,尤其是来自偏南气团的烯烃和OVOCs,以及来自西南方向的芳香烃.

关键词：挥发性有机物(VOCs) 臭氧生成潜势(OFP) 后向轨迹聚类分析上海

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A new index to describe the tropical Asian summer monsoon

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Science china Earth Sciences 2009年第6期52卷 843-854页

作者： ZhongFeng Xu CongBin Fu yongfu qian Key Laboratory of Regional Climate-Environment Research for Temperate East Asia (RCE-TEA) Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China School of atmospheric Sciences Nanjing University Nanjing 210093 C

We define a new monsoon index (MV) as the product of relative vorticity and equivalent potential temperature using the long-term NCEP/NCAR reanalysis data. The MV index provides new insights into the intraseasonal and... 详细信息

关键词： tropical Asian summer monsoon monsoon index intraseasonal variability interannual variability

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大尺度气候数值模拟的一些情况

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高原气象 1988年第1期 70-93页

作者：钱永甫南京大学大气科学系

本文就大尺度气候数值模拟的一些情况作了简要介绍。内容包括气候数值模拟的重要性,用作气候数值模拟的两类数值模式,国内外近年来气候数值模拟的主要进展以及气候数值模拟中存在的若干主要问题等。

关键词：大气环流模拟气候数值模拟气候变化机制

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解析北京郊区一次典型臭氧污染的物理化学过程

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大气科学 2024年第1期48卷 391-404页

作者：贾龙于姗杉徐永福中国科学院大气物理研究所大气边界层物理和大气化学国家重点实验室北京100029 中国科学院大学地球与行星科学学院大气化学与环境科学系北京100049

臭氧污染是我国当前面临的重要大气环境问题,其不仅取决于大气化学反应过程,而且会受大气物理过程和各气象要素的影响,因此需要从化学和物理两个方向来研究近地面臭氧污染问题。本研究结合外场观测和欧拉光化学模式,解析了2.2.年秋季北... 详细信息

臭氧污染是我国当前面临的重要大气环境问题,其不仅取决于大气化学反应过程,而且会受大气物理过程和各气象要素的影响,因此需要从化学和物理两个方向来研究近地面臭氧污染问题。本研究结合外场观测和欧拉光化学模式,解析了2.2.年秋季北京怀柔城区的一次光化学污染周期内的物理和化学过程。给出了温度、湿度和风速等气象因子,以及臭氧及其前体物挥发性有机物(VOCs)和氮氧化物(NO_(x),x=1、2.在此期间的日变化特征。通过源解析得到VOCs主要来源为交通排放(46%)、植物源(2.%)、溶剂挥发(2.%)和燃烧源(9%)。通过欧拉光化学模式确定了区域传输和本地VOCs对臭氧的贡献,结果显示强北风天气条件下,怀柔区臭氧以外来水平输送为主(贡献超过70%);当以弱的南风或东南风为主时,天气处于稳定状态,臭氧主要来自VOCs和NO_(x)的二次转化。根据VOCs的臭氧潜势,在所有VOCs中对臭氧贡献最大的物质为烯烃,其贡献为67%,其次为芳香烃(16%)。通过敏感度分析,发现臭氧生成对物理因子中的光强、温度和边界层高度最敏感;在臭氧前体物中,活性较强的烯烃类物质的敏感度最高,烷烃最低。最后基于本地VOCs特征的EKMA曲线,提出了控制臭氧污染的减排策略。

关键词：臭氧挥发性有机物源解析敏感性分析怀柔

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