Sea Experiments of the Underway Conductivity- Temperature-Depth Prototype Made in China     

SONG Xiangzhou  LI Hui  LIN Xiaopei  CHEN Xueen  GUO Xinshun  TIAN Jiwei 《青岛海洋大学学报(英文版)》2009,(4):409-415

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Relationship Between Producer Services Developing Level and Urban Hierarchy——A Case Study of Zhujiang River Delta     

ZHONG Yun  YAN Xiaopei 《中国地理科学(英文版)》2008,18(1)

As the Central Place Theory indicates, the centricity of a central city can influence the extension of its ser-vice. Since the service industry in the theory is mostly consumer services, it is worth studying the relationship betweenthe producer services and the centricity of the city in the service society with producer services becoming a more im-portant part of the service industry. The paper takes the case of the Zhujiang (Pearl) River Delta (PRD), a developedregion in China, to study the relationship between the developing level of producer services and the urban hierarchy.Based on the analysis about the spatial difference of the producer services in the nine cities of the PRD, and the divi-sion of the nine cities according to some economic indices, it is shown that there is a correlation between the develop-ing level of producer services and the urban hierarchy. Furthermore, two deductions about the future status of the pro-ducer services in the city and the location of the producer services in a large region can be made from this correlationbetween the developing level of producer services and the urban hierarchy.  相似文献   

Contributions of the Bering Strait throughflow to oceanic meridional heat transport under modern and Last Glacial Maximum climate conditions     

ZHANG Cunjie  LIN Xiaopei 《中国海洋湖沼学报》2019,(2)

Paleo reconstructions and model simulations have suggested the Bering Strait plays a pivotal role in climate change. However, the contribution of the Bering Strait throughflow to oceanic meridional heat transport(OMHT) is about 100 times smaller than the OMHT at low latitudes in the modern climate and it is generally ignored. Based on model simulations under modern and Last Glacial Maximum(LGM,～21 ka; ka=thousand years ago) climate conditions, this study highlights the importance of the Bering Strait throughflow to OMHT. The interbasin OMHT induced by the Bering Strait throughflow is estimated by interbasin-intrabasin decomposition. Similar to barotropic-baroclinic-horizontal decomposition, we assume the nonzero net mass transport induced by interbasin throughflows is uniform across the entire section, and the interbasin term is separated to force zero net mass transport for the intrabasin term. Based on interbasinintrabasin decomposition, the contribution of the Bering Strait throughflow is determined as ～0.02 PW(1 PW=10 15 W) under the modern climate, and zero under the LGM climate because the closed Bering Strait blocked interbasin throughflows. The contribution of the Bering Strait throughflow to OMHT is rather small, consistent with previous studies. However, comparisons of OMHT under modern and LGM climate conditions indicate the mean absolute changes are typically 0.05 and 0.20 PW in the North Atlantic and North Pacific, respectively. Thus, the contribution of the Bering Strait throughflow should not be ignored when comparing OMHT under dif ferent climate conditions.  相似文献   

Co-variation of the surface wind speed and the sea surface temperature over mesoscale eddies in the Gulf Stream region:momentum vertical mixing aspect     

HE Jingjing  LIN Xiaopei 《中国海洋湖沼学报》2019,(4)

The co-variation of surface wind speed and sea surface temperature(SST)over the Gulf Stream frontal region is investigated using high-resolution satellite measurements and atmospheric reanalysis data.Results show that the pattern of positive SST-surface wind speed correlations is anchored by strong SST gradient and marine atmospheric boundary layer(MABL)height front,with active warm and cold-ocean eddies around.The MABL has an obvious transitional structure along the strong SST front,with greater(lesser)heights over the north(south)side.The significant positive SST-surface wind-speed perturbation correlations are mostly found over both strong warm and cold eddies.The surface wind speed increases(decreases)about 0.32(0.41)m/s and the MABL elevates(drops)approximate 55(54)m per 1℃ of SST perturbation induced by warm(cold)eddies.The response of the surface wind speed to SST perturbations over the mesoscale eddies is mainly attributed to the momentum vertical mixing in the MABL,which is confirmed by the linear relationships between the downwind(cro sswind)SST gradient and wind divergence(curl).  相似文献   

Seasonal response of surface wind to SST perturbation in the Northern Hemisphere     

HE Jingjing  HAN Xueshuang  LIN Xiaopei 《海洋湖沼学报（英文）》2019,(4):1165-1175

The seasonal response of surface wind speed to sea surface temperature (SST) change in the Northern Hemisphere was investigated using 10 years (2002-2011) high-resolution satellite observations and reanalysis data. The results showed that correlation between surface wind speed perturbations and SST perturbations exhibits remarkable seasonal variation, with more positive correlation is stronger in the cold seasons than in the warm seasons. This seasonality in a positive correlation between SST and surface wind speed is attributable primarily to seasonal changes of oceanic and atmospheric background conditions in frontal regions. The mean SST gradient and the prevailing surface winds are strong in winter and weak in summer. Additionally, the eddy-induced response of surface wind speed is stronger in winter than in summer, although the locations and numbers of mesoscale eddies do not show obvious seasonal features. The response of surface wind speed is apparently due to stability and mixing within the marine atmospheric boundary layer (MABL), modulated by SST perturbations. In the cold seasons, the stronger positive (negative) SST perturbations are easier to increase (decrease) the MABL height and trigger (suppress) momentum vertical mixing, contributing to the positive correlation between SST and surface wind speed. In comparison, SST perturbations are relatively weak in the warm seasons, resulting in a weak response of surface wind speed to SST changes. This result holds for each individual region with energetic eddy activity in the Northern Hemisphere.  相似文献   

转型期社区医疗服务多元供给模式——以广州市天河区为例     

齐兰兰  周素红  闫小培 《热带地理》2013,(2):187-194

以广州市统计局提供的第六次人口普查数据作为人口统计数据源,以天河区卫生局提供的社区医疗机构数据作为社区医疗服务研究数据源,以广州市天河区作为研究案例,总结出社区医疗服务存在政府供给、单位制供给、集体经济供给、社会力量供给4种模式。各供给模式均具有受卫生局领导、政府部门监管和作为城市医疗体系的基础等一系列共性,同时在供给主体、服务对象、筹资与财务管理和人事管理等方面存在差异性,形成相互补充的多元模式共存体系,社区医疗服务的准公共物品属性、社会经济体制转型与城乡二元体制、居民的多元化需求和不同供给主体的利益诉求综合作用是多元模式共存的机制。只有充分利用多元模式供给主体、全方位协调机制要素、进行合理的制度设计,才能更好地促进社区医疗服务均等化,同时为其他城市公共服务供给提供参考借鉴。  相似文献   

吕宋海峡西部深海盆内孤立波潜标观测研究   总被引：2，自引：0，他引：2  

LIU N  WU Dexing  LIN Xiaopei  MENG Qingjia 《海洋学报(英文版)》2014,33(3):101-110

Using a net surface heat flux （Qnet） product obtained from the objectively analyzed air-sea fluxes （OAFlux） project and the international satellite cloud climatology project （ISCCP）, and temperature from the simple ocean data assimilation （SODA）, the seasonal variations of the air-sea heat fluxes in the northwestern Pa cific marginal seas （NPMS） and their roles in sea surface temperature （SST） seasonality are studied. The seasonal variations of Qnet, which is generally determined by the seasonal cycle of latent heat flux （LH）, are in response to the advection-induced changes of SST over the Kuroshio and its extension. Two dynamic regimes are identified in the NPMS： one is the area along the Kuroshio and its extension, and the other is the area outside the Kuroshio. The oceanic thermal advection dominates the variations of SST and hence the sea-air humidity plays a primary role and explains the maximum heat losing along the Kuroshio. The heat transported by the Kuroshio leads to a longer period of heat losing over the Kuroshio and its Extension. Positive anomaly of heat content corresponds with the maximum heat loss along the Kuroshio. The oceanic advection controls the variations of heat content and hence the surface heat flux. This study will help us understand the mechanism controlling variations of the coupled ocean-atmosphere system in the NPMS. In the Kuroshio region, the ocean current controls the ocean temperature along the main stream of the Ku roshio, and at the same time, forces the air-sea fluxes.  相似文献   

Seasonal variability of Kuroshio intrusion northeast of Taiwan Island as revealed by self-organizing map   总被引：1，自引：0，他引：1  

殷玉齐  林霄沛  李宜振  曾相明 《中国海洋湖沼学报》2014,32(6):1435-1442

The self-organizing map method is applied to satellite-derived sea-level anomaly fields of 1993-2012 to study variations of the Kuroshio intrusion northeast of Taiwan Island. Four major features are revealed, showing significant seasonal variability of the intrusion. In general, the intrusion increases （decreases） with a high （low） sea-level anomaly at the edge of the East China Sea shelf in winter （summer）. Open-ocean mesoscale eddies play an additional role in modulating the seasonal variation of the intrusion. Further analyses are needed to study eddy-Kuroshio interaction dynamics.  相似文献   

城市更新之研究   总被引：7，自引：2，他引：5  

严若谷  周素红  闫小培 《地理科学进展》2011,30(8):947-955

城市更新是城市发展到一定阶段所必然经历的再开发过程,不同的时代背景和地域环境中的城市更新具有不同的动因机制、开发模式、权力关系,进而产生不同的经济、环境、社会效应。追溯近年来英文文献中大量出现的有关＂urban regeneration＂的研究及中国近30年来城市更新相关文献,总结地理学视角对城市更新的研究范围、研究领域及研究特点,论述与城市更新相关的理论,阐述城市更新的形成机制,分析各地区在不同阶段采用的更新政策,更新模式,更新手段和方法,以及更新参与主体和更新后的效果,对比分析国内外城市更新研究内容及特点。从城市更新同城市建设、经济发展的内在联系机制,城市更新中微观个体的行为研究,可持续发展观下的综合城市更新研究等3个方面,总结对未来中国城市更新发展的可借鉴性启示。  相似文献   

Research on the Global Warming Hiatus   总被引：1，自引：0，他引：1  

Lin Xiaopei  Xu Lixiao  Li Jianping  Luo Dehai  Liu Hailong 《地球科学进展》2016,31(10):995-1000

A global warming “hiatus” has been observed since the beginning of the 21st century despite the increase in heat-trapping greenhouse gases, challenging the current global warming studies. Focusing on the phenomena and mechanisms of the global warming “hiatus”, the National Key Research Program of China launched a project in July, 2016. The main research themes of this project cover: ①Revealing the spatial and temporal variability of the global warming hiatus, and quantifying the contributions of external forcing and internal (natural) variability, respectively; ②Revealing the role of the atmosphere in the global heat and energy redistribution under global warming hiatus; ③Revealing the role of the ocean in the global heat and energy redistribution under global warming hiatus; ④Investigating the predictability of the global warming hiatus. The key scientific issues to be resolved include: ①Identifying characteristics of the global warming hiatus and discerning the roles of decadal, multi-decadal oscillations; ②Revealing the role of ocean-atmosphere dynamical processes in the global redistribution of heat and energy; ③Understanding the predictability of the global warming hiatus. The research aims to predict the future development of the global warming hiatus, and to point out the possible impacts on China and other important areas, including “The Belt and Road” core area and the Polar Regions.  相似文献