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A primary study of the correlation between the net air-sea heat flux and the interannual variation of western North Pacific tropical cyclone track and intensity

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Acta oceanologica Sinica 2011年第6期30卷 27-35页

作者： WU Liang WEN Zhiping HUANG Ronghui center for Monsoon and Environment research/Department of Atmospheric {2.s Sun Yat-sen University Guangzhou 510275 China center for Monsoon System research Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China

A singular value decomposition （SVD） analysis is carried out to reveal the relationship between the interannual variation of track and intensity of the western North Pacific tropical cyclones （WNPTCs） in the tropical cyclone （TC） active season （July–November） and the global net air-sea heat flux （Q net ） in the preceding season （April–June）. For this purpose, a tropical cyclone track and intensity function （TIF） is defined by a combination of accumulated cyclone energy （ACE） index and a cyclone track density function. The SVD analysis reveals that the first mode is responsible for the positive correlation between the upward heat flux in the tropical central Pacific and the increased activity of western North Pacific （WNP） TIF, the second mode for the positive correlation between the upward heat flux in the North Indian ocean and the northeastward track shift of WNPTCs and the third mode for the negative correlation between the upward heat flux in mid-latitude central Pacific and the northwest displacement of the WNP TC-active center. This suggests that Q net anomalies in some key regions have a substantial remote impact on the WNP TC activity.

关键词： tropical cyclone western North Pacific the net air-sea heat flux (Q net ) interannual variation

Vortex genesis over the Bay of Bengal in spring and its role in the onset of the Asian Summer Monsoon

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science china Earth sciences 2011年第1期54卷 1-9页

作者： WU GuoXiong1, GUAN Yue1,2. WANG TongMei3. LIU YiMin1, YAN JingHui4 & MAO JiangYu1 1 State Key Laboratory of Numerical Modeling for Atmospheric sciences and Geophysical Fluid Dynamics (LASG), Institute of Atmospheric Physics, Chinese Academy of sciences, Beijing 10002.,{2. 2.raduate University of Chinese Academy of sciences, Beijing 100049,{2. 3.epartment of Atmospheric science, sun yat-sen University, guangzhou 510275,{2. 4National Climate center,{2. Meteorological Administration, Beijing 100080,{2. 1. State Key Laboratory of Numerical Modeling for Atmospheric sciences and Geophysical Fluid Dynamics (LASG) Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China2. Graduate University of Chinese Academy of Sciences Beijing 100049 China3. Department of Atmospheric Science Sun Yat-Sen University Guangzhou 510275 China4. National Climate Center China Meteorological Administration Beijing 100080 China

Physical processes associated with onset of the 1998 Asian summer monsoon were examined in detail using multi-source datasets. We demonstrated that strong ocean-atmosphere-land interaction in the northern Indian ocean and tropical Asian area during spring is a fundamental factor that induces the genesis and development of a monsoon onset vortex over the Bay of Bengal (BOB), with the vortex in turn triggering onset of the Asian summer monsoon. In spring, strong surface {2.sible heating over India and the Indo{3. Peninsula is transferred to the atmosphere, forming prominent in situ cyclonic circulation, with anticyclonic circulations over the Arabian Sea and northern BOB where the ocean receives abundant solar radiation. The corresponding surface winds along the North Indian ocean coastal areas cause the ocean to produce the in situ offshore currents and upwelling, resulting in sea surface temperature (SST) cooling. With precipitation on the Indo{3. Peninsula increasing from late April to early May, the offshore current disappears in the eastern BOB or develops into an onshore current, leading to SST increasing. A southwest-northeast oriented spring BOB warm pool with SST >3.°C forms in a band from the southeastern Arabian Sea to the eastern BOB. In early May, the Somali cross-equatorial flow forms due to the meridional SST gradient between the two hemispheres, and surface {2.sible heat over the African land surface. The Somali flow overlaps in phase with the anticyclone over the northern Arabian Sea in the course of its inertial fluctuation along the equator. The convergent cold northerlies on the eastern side of the anticyclone cause the westerly in the inertial trough to increase rapidly, so that enhanced {2.sible heat is released from the sea surface into the atmosphere. The cyclonic vorticity forced by such {2.sible heating is superimposed on the inertial trough, leading to its further increase in vorticity strength. Since atmospheric inertial motion is destr

关键词： air-sea interaction spring BOB warm pool monsoon onset vortex inertial oscillation Asian summer monsoon onset

An Improved Finite Difference Scheme for Solving the Equation of Filtration Type in Porous Textiles with Phase Change Materials

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An Improved Finite Difference Scheme for Solving the Equatio...

Local Climate Change Induced by Urbanization on a South china Sea Island

2.07国际计算力学研讨会

作者： Q.Y.Zhu~(1 2.) 1 ocean Engineering research {2. School of Engineering Zhongshan University guangzhou 510275 china 2.Guangdong Province Key Laboratory of coastal ocean Engineering Zhongshan University guangzhou 510275 china ocean Engineering research {2. School of EngineeringZhongshan UniversityGuangzhou510275China Guangdong Province Key Laboratory of coastal ocean Engineering Zhongshan University Guangzhou 510275 China

＜正＞In this paper an improved finite difference scheme is investigated to solve the equation of filtration type in porous textiles with phase change materials（PCM）,which can be expressed as a nonlinear source term. Due to the effects of source term,the constructed scheme is total variation bounded（TVB）.On the basis of this scheme thermal buffering effect of PCM is *** distributions of the temperature,saturated degree in the porous media with PCM were numerically computed by this *** the comparison the distributions of the temperature,saturated degree in the porous media without PCM were also numerically *** results indicate that this method is satisfactory.

关键词： improved finite difference scheme porous textiles phase change material

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Journal of Tropical Meteorology 2024年第1期30卷 11-19页

作者：郝宇李磊陈柏纬孙伟戴永久 School of Atmospheric sciences Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai)Sun Yatsen UniversityZhuhaiGuangdong 519082 China Guangdong Provincial Observation and research Station for Climate Environment and Air Quality Change in the Pearl River Estuary ZhuhaiGuangdong 519082 China Key Laboratory of Tropical Atmosphere-ocean System Ministry of EducationSun Yat-sen UniversityZhuhaiGuangdong 519082 China Guangdong Provincial Marine Meteorology science Data center Guangzhou 510640 China Hong Kong Observatory KowloonHongkong 999077 China Meteorological Bureau of Sansha City SanshaHainan 573199 China

The South china Sea is a hotspot for regional climate *** the past 40 years,considerable improvement has been made in the development and utilization of the islands in the South china Sea,leading to a substantial change in the land-use of the ***,{2. on the impact of human development on the local climate of these islands is *** study analyzed the characteristics of local climate changes on the islands in the South china Sea based on data from the Yongxing Island Observation Station and ERA5 ***,the influence of urbanization on the local climate of the South china Sea islands was explored in this *** findings revealed that the 10-year average temperature in Yongxing Island increased by approximately 1.11℃from 1961 to 2.2.,and the contribution of island development and urbanization to the local warming rate over 60 years was approximately 3..2..The linear increasing trend of the annual hot days from 1961–2.2. was approximately 14.84 days per *** diurnal temperature range exhibited an increasing trend of 0.05℃per decade,whereas the number of cold days decreased by 1.06days per *** rapid increase in construction on Yongxing Island from 2.05 to 2.2. led to a decrease in observed surface wind speed by 0.3.2}m s^(-1)per ***,the number of days with strong winds decreased,whereas the number of days with weak winds ***,relative humidity exhibited a rapid decline from 2.01 to 2.16 and then *** study also found substantial differences between the ERA5 re-analysis and observation data,particularly in wind speed and relative humidity,indicating that the use of re-analysis data for climate resource assessment and climate change evaluation on island areas may not be feasible.

关键词： local climate climate change Yongxing Island a South china Sea island climate change induced by urbanization

一个理想河口中拦门沙的存在对河口羽流扩展的影响

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海洋与湖沼 2024年第1期55卷 37-50页

作者：吴文森张昊丹刘嘉欢龚文平中山大学海洋科学学院广东珠海519082 广东省海洋发展规划研究中心广东广州510060 广东省海洋资源与近海工程重点实验室广东珠海519082

河口羽流是河口冲淡水在陆架中扩展的主要形式,其扩展受到诸多动力与地形因素的影响,口门拦门沙就是其中之一。以一个理想化的河口为例,采用区域海洋模型(regional ocean modelling system,ROMS),研究口门拦门沙对河口羽流扩展的影响,... 详细信息

河口羽流是河口冲淡水在陆架中扩展的主要形式,其扩展受到诸多动力与地形因素的影响,口门拦门沙就是其中之一。以一个理想化的河口为例,采用区域海洋模型(regional ocean modelling system,ROMS),研究口门拦门沙对河口羽流扩展的影响,具体包括拦门沙对羽流的出流状态、扩展范围以及远场区沿岸流淡水输运的影响。研究结果表明,拦门沙增加了口门处的水体分层,减小了羽流出流速度,增大了羽流凸出体的半径,减小了远场区沿岸流宽度,并进而减少了沿岸流中的淡水输送。本项研究对地形因素对河口羽流的扩展研究以及陆源物质的向海输运等均具有重要意义。

关键词：河口羽流拦门沙 ROMS海洋模式

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基于色相角算法的珠江口赤潮遥感识别

中山大学学报（自然科学版）（中英文） 2024年第1期63卷 96-104页

作者：许源兴孙琰肖鹤艾彬刘大召广东海洋大学电子与信息工程学院广东湛江524088 中山大学海洋科学学院广东珠海519082 南方海洋科学与工程广东省实验室(珠海) 广东珠海519082 广东省海洋遥感与信息技术工程技术中心广东湛江524088

为实现珠江口高分辨率赤潮遥感识别,科学支撑赤潮灾害防灾减灾工作,利用海洋一号C/D卫星搭载的海岸带成像仪高空间分辨率数据,在分析珠江口近岸浑浊水体、干净水体和赤潮水体遥感影像光谱特征基础上,通过计算水体色相角并结合目视解译... 详细信息

为实现珠江口高分辨率赤潮遥感识别,科学支撑赤潮灾害防灾减灾工作,利用海洋一号C/D卫星搭载的海岸带成像仪高空间分辨率数据,在分析珠江口近岸浑浊水体、干净水体和赤潮水体遥感影像光谱特征基础上,通过计算水体色相角并结合目视解译识别珠江口赤潮。利用该方法成功识别2.2.年10月2.日—11月6日在珠江口海域发生的双胞旋沟藻赤潮。利用色相角能够很好地识别出珠江口海域的赤潮;赤潮水体的色相角在58°~61°变化;该方法对形成初期的小范围赤潮、低密度赤潮和条带状赤潮具有很好的识别效果。

关键词：珠江口赤潮 HY-1C/D 色相角

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Assessing Landsat-8 atmospheric correction schemes in low to moderate turbidity waters from a global perspective

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International Journal of Digital Earth 2023年第1期16卷 66-92页

作者： Nanyang Yan Zhen sun Wei Huang Zhao Jun Shaojie sun School of Marine sciences Sun Yat-sen UniversityGuangzhouPeople’s Republic of China Southern Marine science and Engineering Guangdong Laboratory(Zhuhai) ZhuhaiPeople’s Republic of China Guangdong Provincial Key Laboratory of Marine Resources and coastal Engineering GuangzhouPeople’s Republic of China Pearl River Estuary Marine Ecosystem research Station Ministry of EducationZhuhaiPeople’s Republic of China Key Laboratory of Natural Resources Monitoring in Tropical and Subtropical area of South china Ministry of Natural ResourcesGuangzhouPeople’s Republic of China

Atmospheric correction is one of the major challenges in ocean color remote sensing,thus threatening comprehensive evaluation of water quality within aquatic *** this study,five state-of-the-art atmospheric correction(AC)processors(***,C2.CC,iCOR,L2.en,and Polymer)were applied to Operational Land Imager(OLI)Landsat-8 scenes and evaluated against in situ measurements across various types of waters worldwide.A total of 2.2.matchups between in situ measured and satellite-derived remote sensing reflectance(R_(rs))at 2. sites were obtained between August 2.13.and August *** of optical water types(OWTs)was carried out using in situ measurements with matched satellite ***-specific analysis demonstrated that L2.en produced the most accurate Rrs with R^(2.≥0.74 and root mean squared error(RMSE)≤0.0018 sr^(–1) for the four visible bands of OLI,followed by Polymer,C2.CC,iCOR,and *** terms of R_(rs) spectral similarity,C2.CC yielded the lowest spectral angle(SA)of 8.55°,followed by L2.en(SA=9.2.°).The advantage and disadvantage of each AC scheme were *** to improve the accuracy for atmospheric correction were made,such as polarization observations and concurrent aerosol and ocean color measurements.

关键词： Atmospheric correction Landsat-8 oceancolor remote sensing reflectance

Combined effect of the QBO and ENSO on the MJO

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Atmospheric and oceanic science Letters 2019年第3期12卷 170-176页

作者： sun Liying WANG Hui LIU Fei Earth System Modeling and Climate Dynamics research center Nanjing University of Information Science and TechnologyNanjingChina School of Atmospheric sciences Sun Yat-sen UniversityGuangzhouChina

This study investigates the combined effect of the El Nino–Southern Oscillation(ENSO) and stratospheric quasi-biennial oscillation(QBO) on the Madden Julian Oscillation(MJO). The results show that the western Pacific MJO originating from the Indian ocean during La Nina/QBO easterly years is stronger than that during El Nino years. This relation, however, disappears during La Nina/QBO westerly years. The reason is that ENSO and the QBO have different effects on each MJO event. For an El Nino year, there is only about one MJO event, and the QBO effect is small. During a La Nina/QBO easterly year, there are 1.7 MJO events, while during a La Nina/QBO westerly year, there are only 0.6 MJO events. El Nino can reinforce the MJO over the western Pacific because of the positive moisture advection of the El Nino mean state by MJO easterly wind anomalies. The QBO mainly affects the MJO over the Maritime Continent region by changing the high-cloud-controlled diurnal cycle;and the Maritime Continent barrier effect is enhanced during the QBO westerly phase because of the strong diurnal cycle. During El Nino years, even the MJO over the Maritime Continent is suppressed by the QBO westerly phase;the MJO can be reinforced over the western Pacific. During La Nina/QBO westerly years,the MJO over the Maritime Continent is suppressed because of the strong Maritime Continent diurnal cycle, and it is further suppressed over the western Pacific because of the lack of a reinforcement process.

关键词： QBO ENSO MJO Maritime Continent diurnal cycle

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近海污染的生态修复技术研究进展

中国环境科学 2018年第5期38卷 1855-1866页

作者：钱伟冯建祥宁存鑫朱小山王秋丽蔡中华清华大学深圳研究生院海洋科学与技术学部广东深圳518055 清华大学环境学院北京100084 中山大学生命科学学院广东广州510275 哈尔滨工业大学深圳研究生院土木与环境工程学院广东深圳518055 辽宁省环境监测实验中心辽宁沈阳110161

随着现代社会经济的快速发展,近岸海域污染已成为世界性难题,严重影响近海海洋生态系统.如何对受损海洋生态系统进行修复成为当前海洋环境科学的热点问题.本文结合国内外的研究进展,扼要阐述了海洋生态修复的基本原理;并按生态系统不同... 详细信息

随着现代社会经济的快速发展,近岸海域污染已成为世界性难题,严重影响近海海洋生态系统.如何对受损海洋生态系统进行修复成为当前海洋环境科学的热点问题.本文结合国内外的研究进展,扼要阐述了海洋生态修复的基本原理;并按生态系统不同营养级——生产者(植物)、消费者(动物)和分解者(微生物)梳理了当前主要的近海污染生态修复技术及其研究现状;分析其在修复实践中可能存在的问题并提出进一步的研究方向.本文可为控制海洋污染,保护海洋生态系统,开展海洋生态修复理论与实践研究,以及制定海洋生态保护政策提供有益的参考.

关键词：海洋污染海洋生态生态修复海洋资源生物修复