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Fast and Slow Responses of the North Pacific Mode Water and Subtropical Countercurrent to Global Warming

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Journal of Ocean University of China 2013年第2期12卷 216-221页

作者： xu lixiao XIE Shang-Ping LIU Qinyu Physical Oceanography Laboratory and Key Laboratory of Ocean-Atmosphere Interaction and Climate in Universities of Shandong Ocean University of China Scripps Institution of Oceanography University of California at San DiegoLa JollaCA 92093-0230USA International Pacific Research Center and Department of Meteorology University of HawaiiHonoluluHI 96822USA

Six coupled general circulation models from the Coupled Model Intercomparison Project Phase 5 (CMIP5) are em-ployed for examining the full evolution of the North Pacific mode water and Subtropical Countercurrent (STCC) under global warming over 400 years following the Representative Concentration Pathways (RCP) 4.5. The mode water and STCC first show a sharp weakening trend when the radiative forcing increases, but then reverse to a slow strengthening trend of smaller magnitude after the radiative forcing is stablized. As the radiative forcing increases during the 21st century, the ocean warming is surface-intensified and decreases with depth, strengthening the upper ocean's stratification and becoming unfavorable for the mode water formation. Moving southward in the subtropical gyre, the shrinking mode water decelerates the STCC to the south. After the radiative forcing is stabilized in the 2070s, the subsequent warming is greater at the subsurface than at the sea surface, destabilizing the upper ocean and becoming favorable for the mode water formation. As a result, the mode water and STCC recover gradually after the radiative forc-ing is stabilized.

关键词： mode water STCC fast and slow response CMIP5 radiative forcing

Changes in Mixed Layer Depth and Spring Bloom in the Kuroshio Extension under Global Warming

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Advances in Atmospheric Sciences 2016年第4期33卷 452-461页

作者： Ruosi ZHANG Shang-Ping XIE lixiao xu Qinyu LIU Physical Oceanography Laboratory Qingdao Collaborative Innovation Center of Marine Science and TechnologyKey Laboratory of Ocean-Atmosphere Interaction and Climate in Universities of Shandong Ocean University of China Scripps Institution of Oceanography University of California San Diego

The mixed layer is deep in January-April in the Kuroshio Extension region. This paper investigates the response in this region of mixed layer depth （MLD） and the spring bloom initiation to global warming using the output of 15 models from CMIP5. The models indicate that in the late 21st century the mixed layer will shoal and the MLD reduction will be most pronounced in spring at about 33~N on the southern edge of the present deep-MLD region. The advection of temperature change in the upper 100 m by the mean eastward flow explains the spatial pattern of MLD shoaling in the models. Associated with the shoaling mixed layer, the onset of spring bloom inception is projected to advance due to the strengthened stratification in the warming climate.

关键词： mixed layer depth global warming temperature advection spring bloom

Tropical Pacific Decadal Variability in Subsurface Temperature

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Journal of Ocean University of China 2012年第4期11卷 451-454页

作者： LIU Qinyu xu lixiao LU Jiuyou WANG Qi Physical Oceanography Laboratory Ocean-Atmosphere Interaction and Climate LaboratoryOcean University of ChinaQingdao 266100P.R.China

The nature decadal variability of the equatorial Pacific subsurface temperature is examined in the control simulation with the Geophysical Fluid Dynamics Laboratory coupled model *** dominant mode of the subsurface temperature variations in the equator Pacific features a 20-40 year period and is North-South asymmetric about the *** variations of the thermocline are most pronounced in the southwest of the Tropical *** variation of the north-south asymmetric Sea Surface wind in the tropical Pacific,especially in the South Pacific Convergence,is the dominant mechanism of the nature decadal variation of the subsurface temperature in the equatorial Pacific.

关键词： decadal variation asymmetry about equator subsurface temperature variation sea surface wind South Pacific Con-vergence Zone

Response of Mode Water and Subtropical Countercurrent to Greenhouse Gas and Aerosol Forcing in the North Pacific

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Journal of Ocean University of China 2013年第2期12卷 222-229页

作者： WANG Liyi LIU Qinyu xu lixiao XIE Shang-Ping Physical Oceanography Laboratory and Key Laboratory of Ocean-Atmosphere Interaction and Climate in Universities of Shandong Ocean University of China Scripps Institution of Oceanography University of California at San DiegoLa JollaCA 92093-0230USA

The response of the North Pacific Subtropical Mode Water and Subtropical Countercurrent (STCC) to changes in greenhouse gas (GHG) and aerosol is investigated based on the 20th-century historical and single-forcing simulations with the Geo-physical Fluid Dynamics Laboratory Climate Model version 3 (GFDL CM3). The aerosol effect causes sea surface temperature (SST) to decrease in the mid-latitude North Pacific, especially in the Kuroshio Extension region, during the past five decades (1950-2005), and this cooling effect exceeds the warming effect by the GHG increase. The STCC response to the GHG and aerosol forcing are opposite. In the GHG (aerosol) forcing run, the STCC decelerates (accelerates) due to the decreased (increased) mode waters in the North Pacific, resulting from a weaker (stronger) front in the mixed layer depth and decreased (increased) subduction in the mode water formation region. The aerosol effect on the SST, mode waters and STCC more than offsets the GHG effect. The response of SST in a zonal band around 40?N and the STCC to the combined forcing in the historical simulation is similar to the response to the aerosol forcing.

关键词： North Pacific Subtropical Countercurrent mode water greenhouse gas aerosol

Effects of Rare Earth Pr/Ce on Tribological Behavior of ADC12 Alloy

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Journal of Wuhan University of Technology(Materials Science) 2021年第1期36卷 136-142页

作者： xu lixiao YAN Hong LIU Wei XIONG Junjie School of Mechanical and Electrical Engineering Nanchang UniversityNanchang 330031China Key Laboratory of Light Alloy Preparation and Processing Nanchang 330031China

The microstructure and microhardness of ADC12 alloy that was mixed with 0,0.3,0.6,and 0.9 wt.% rare earth praseodymium/cerium (Pr/Ce) were *** addition of Pr/Ce improved the microhardness of the *** ADC12+0.6 wt% Pr/Ce alloy displayed the smallest grain size and maximal *** tribological behavior of the alloys was tested by the pin-on-disc dry sliding friction pair with a sliding velocity of 0.21 m/s under various loads (20,40,60,80 N).The wear morphology was observed by a scanning electron microscope (SEM) and the wear mechanism was *** result indicated that the wear resistance of ADC12+0.6 wt% Pr/Ce alloy was the most *** wear rate relative to the matrix is reduced by 67.5% under a load of 20 *** wear mechanism is adhesive wear.

关键词： Pr/Ce ADC12 microstructure microhardness wear mechanism

新生代农民工教育:问题与对策——基于公共文化教育资源的视角

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教育发展研究 2014年第17期34卷 76-79页

作者：徐丽晓南阳师范学院图书馆南阳473061

当前,利用公共文化教育资源促进新生代农民工教育存在新生代农民工被排斥、公共文化教育资源配置偏离农民工聚集区、教育产品偏离教育需求、经济消费超出承受力等问题,可以通过扩大公共文化教育资源覆盖范围、降低新生代农民工被排斥感... 详细信息

当前,利用公共文化教育资源促进新生代农民工教育存在新生代农民工被排斥、公共文化教育资源配置偏离农民工聚集区、教育产品偏离教育需求、经济消费超出承受力等问题,可以通过扩大公共文化教育资源覆盖范围、降低新生代农民工被排斥感、合理配置教育资源、提供符合需求的教育产品、建立经费投入机制等途径解决这些问题。

关键词：公共文化教育资源新生代农民工

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国内图书馆知识服务典型案例研究

情报理论与实践 2010年第11期33卷 80-82页

作者：徐丽晓南阳师范学院图书馆河南南阳473061

知识服务是图书馆的核心竞争力,选取上海大学图书馆、中国科学院国家科学图书馆、中国知网数字图书馆就其知识服务状况进行调查分析,提出图书馆知识服务的优化措施。

关键词：图书馆知识服务案例研究

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信息组织方向课程教学实习系统研究

现代情报 2008年第11期28卷 194-197页

作者：徐丽晓南阳师范学院图书馆河南南阳473061

对信息组织方向课程教学实习系统的国内外研究进行综述,并对该实习系统进行国内外调研分析,提出了该实习系统开发的目标、特点与基本功能。

关键词：信息组织实习系统

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我国高校图书馆员去职业化探析

中国劳动关系学院学报 2014年第3期28卷 95-97页

作者：徐丽晓南阳师范学院图书馆河南南阳473061

我国高校存在着图书馆员去职业化现象,计算机网络技术的冲击、职业资格认证制度的缺失、专业教育与工作实际脱节、图书馆员职业歧视、图书馆业务外包等是造成图书馆员去职业化的众多原因,基于此,笔者提出防止我国高校图书馆员去职业化... 详细信息

我国高校存在着图书馆员去职业化现象,计算机网络技术的冲击、职业资格认证制度的缺失、专业教育与工作实际脱节、图书馆员职业歧视、图书馆业务外包等是造成图书馆员去职业化的众多原因,基于此,笔者提出防止我国高校图书馆员去职业化的措施,如建立图书馆员职业资格认证制度、重视图书馆员继续教育、变革图书馆学专业教育、慎重对待图书馆业务外包等。

关键词：图书馆员去职业化职业资格业务外包