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Intraseasonal Variability of Summertime Surface Air Temperature over Mid-High-Latitude Eurasia and Its Prediction Skill in S2S Models

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Journal of Meteorological Research 2021年第5期35卷 815-830页

作者： Jing CUI shuangyan yang Tim LI Key Laboratory of Meteorological Disaster Ministry of Education(KLME)/Joint International Research Laboratory of Climate and Environmental Change(ILCEC)/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters(CIC-FEMD)Nanjing University of Information Science&TechnologyNanjing 210044China International Pacific Research Center and Department of Atmospheric Sciences School of Ocean and Earth Science and TechnologyUniversity of HawaiiHonoluluHI 96822USA

Features of the dominant modes of surface air temperature(SAT)on the intraseasonal timescale over the mid-highlatitude Eurasia(MHE)during boreal summer(June-September)are investigated based on the ERA5 reanalysis data from 1979 to *** intraseasonal variability(ISV)of SAT over MHE is primarily characterized by an eastward propagation along 60°N,which is found to impact the regional weather in China,including summertime extreme hot and cool *** forecast skill and potential predictability of the ISV of SAT over MHE are assessed for 5 dynamical models that have participated in the subseasonal-to-seasonal(S2 S)prediction project,by analyzing12 years’(1999-2010)model reforecast/hindcast *** using the principal component(PC)index of the leading intraseasonal SAT modes as a predictand,we found that the forecast skill for ISV of SAT can reach out to 11-17 days,and the ECMWF model exhibits the best *** the S2 S models tend to show 1)a relatively higher skill for strong intraseasonal oscillation(ISO)cases,2)a systematic underestimate of the amplitude of the SAT ISV signal,and 3)different skills during different phases of ISO *** of potential predictability based on the perfectmodel assumption reveals a 4-6-day skill gap for most models,and the skill gap also varies among different phases of ISO *** results imply the need for continued development of operational forecasting systems to improve the actual prediction skills for the ISV of SAT over MHE.

关键词： surface air temperature(SAT) intraseasonal variability(ISV) mid-high-latitude Eurasia(MHE) subseasonal-to-seasonal(S2S)prediction prediction skill predictability

基于大数据的高职学生课余体育锻炼行为干预实验研究

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冰雪体育创新研究 2024年第3期 40-42页

作者：杨双燕陈静静南京工业职业技术大学体育部江苏南京210023

目的:探讨采用大数据技术干预高职学生课余体育锻炼行为的效果。方法:抽取20名大一学生分成实验组和对照组,实验组进行大数据干预,对照组保持原有的体育锻炼方式。结果:实验组组内比较,大数据技术干预后体育锻炼频率、锻炼时间、锻炼强... 详细信息

目的:探讨采用大数据技术干预高职学生课余体育锻炼行为的效果。方法:抽取20名大一学生分成实验组和对照组,实验组进行大数据干预,对照组保持原有的体育锻炼方式。结果:实验组组内比较,大数据技术干预后体育锻炼频率、锻炼时间、锻炼强度和三项身体素质比干预前都有明显提高(p0.05);组间比较,实验组和对照组的体育锻炼频率、锻炼时间、锻炼强度和三项身体素质在实验后有显著性的变化(p<0.05);结论:采用大数据技术干扰,能有效地促进学生体育锻炼习惯的养成和身体素质的提高;对照组学生在体育锻炼行为和身体素质等没有明显的改善,耐力素质还有下降趋势。

关键词：课余体育锻炼行为大数据技术干预高职学生

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Decadal Variation of the Impact of La Nina on the Winter Arctic Stratosphere

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Advances in Atmospheric Sciences 2017年第5期34卷 679-684页

作者： shuangyan yang Tim LI Jinggao HU Xi SHEN Key Laboratory of Meteorological Disaster Ministry of Education/Joint International Research Laboratory of Climate and Environmental Change/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters Nanjing University of lnformation Science and Technology Nanjing 210044 China International Pacific Research Center and Department of Atmospheric Sciences University of Hawaii at Manoa Honolulu Hawaii 96822 USA

The impact of La Ni?a on the winter Arctic stratosphere has thus far been an ambiguous topic of research. Contradictory results have been reported depending on the La Ni?a events considered. This study shows that this is mainly due to the decadal variation of La Ni?a’s impact on the winter Arctic stratosphere since the late 1970 s. Specifically,during the period1951–78,the tropospheric La Ni?a teleconnection exhibits a typical negative Pacific–North America pattern,which strongly inhibits the propagation of the planetary waves from the extratropical troposphere to the stratosphere,and leads to a significantly strengthened stratospheric polar vortex. In contrast,during 1979–2015,the La Ni?a teleconnection shifts eastwards,with an anomalous high concentrated in the northeastern Pacific. The destructive interference of the La Ni?a teleconnection with climatological stationary waves seen in the earlier period reduces greatly,which prevents the drastic reduction of planetary wave activities in the extratropical stratosphere. Correspondingly,the stratospheric response shows a less disturbed stratospheric polar vortex in winter.

关键词： La Nina stratospheric polar vortex decadal variation planetary waves

个性化膀胱安全容量指导下的有限冷热膀胱冲洗联合间歇性导尿对脊髓损伤后神经源性膀胱患者的膀胱功能康复的影响

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内科 2024年第2期19卷 129-132页

作者：肖家骥杨双妍马帅李柯岚广西中医药大学第一附属医院康复医学科南宁市530023 广西南宁市第一人民医院南宁市530016 广西中医药大学护理学院南宁市530200

目的探讨个性化膀胱安全容量指导下的有限冷热膀胱冲洗联合间歇性导尿对脊髓损伤后神经源性膀胱患者膀胱功能康复的影响。方法选取64例脊髓损伤后神经源性膀胱患者作为研究对象,随机将其分为研究组和对照组,每组32例。对照组行个性化膀... 详细信息

目的探讨个性化膀胱安全容量指导下的有限冷热膀胱冲洗联合间歇性导尿对脊髓损伤后神经源性膀胱患者膀胱功能康复的影响。方法选取64例脊髓损伤后神经源性膀胱患者作为研究对象,随机将其分为研究组和对照组,每组32例。对照组行个性化膀胱安全容量指导下的间歇性导尿,研究组在此基础上行个性化膀胱安全容量指导下的有限冷热膀胱冲洗,两组均干预4周。比较两组尿路感染情况、膀胱安全容量、残余尿量、单次排尿量和尿失禁次数。结果干预4周后,研究组的尿路感染率、残余尿量、尿失禁次数均低于对照组;研究组的膀胱安全容量、单次排尿量均大于对照组(均P<0.05)。结论个性化膀胱安全容量指导下的有限冷热膀胱冲洗联合间歇性导尿可增大脊髓损伤后神经源性膀胱患者的膀胱安全容量,增加单次排尿量,减少尿路感染情况、残余尿量和尿失禁次数。

关键词：冷热膀胱冲洗间歇性导尿脊髓损伤神经源性膀胱护理

The zonal propagating characteristics of low-frequency oscillation over the Eurasian mid-high latitude in boreal summer

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Science China Earth Sciences 2013年第7期56卷 1566-1575页

作者： yang shuangyan WU BingYi ZHANG RenHe ZHOU ShunWu Chinese Academy of Meteorological Sciences Nanjing University of Information Science and Technology

Using 32-yr National Centers for Environment Prediction-National Center for Atmospheric Research(NCEP-NCAR) reanalysis data,we investigated zonal propagation and circulation characteristics of the low-frequency circulation for the prevailing period over Eurasian mid-high latitude in boreal summer(May-August) in terms of empirical orthogonal function(EOF),linear regression,and phase analysis and so *** found that the dominant periods of the low-frequency circulation are 10-30 days and it clearly shows meridional(southward) and zonal(westward) propagation features at the middle troposphere(500 hPa).The average zonal speed of the 10-30 days low-frequency oscillation(LFO) is about 9-10 longitudes per *** analysis shows that the southernmost part of the polar vortex in the northern hemisphere exhibits westward clockwise rotation in the eastern hemisphere in boreal ***,the southernmost tips of 5400 and 5500 gpm contours,which indicate the site of the major trough in the eastern hemisphere,obviously move *** southernmost tip of 5500 gpm contour line propagates westwards at the speed of about 9-10 longitudes per day,which is consistent with the mean zonal speed of the westward propagation of the low-frequency ***,the 10-30-day LFO-related cold air also shows west propagation feature with respect to LFO *** westward propagation of the LFO is the low-frequency-scale embodiment of the clockwise rotation of polar *** cold air activities closely related to polar vortex or to ridge-trough system activities is the essential circulation of 10-30 days LFO circulation over the Eurasian mid-high latitude in boreal summer.

关键词： The zonal propagating characteristics of low-frequency oscillation over the Eurasian mid-high latitude in boreal summer

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A four-band index for both liquid and solid water and its applications in the Aral Sea Basin

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Science China Earth Sciences 2024年第3期67卷 769-788页

作者： Bing YUE Xi CHEN Saibo LI Zhengping DU John WILSON Junhui yang Yimen JIAO shuangyan HUANG Chenghu ZHOU Xinjiang Institute of Ecology and Geography Chinese Academy of SciencesUrumqi 830011China College of Resources and Environment University of Chinese Academy of SciencesBeijing 100049China Institute of Geographical Sciences and Natural Resources Research Chinese Academy of SciencesBeijing 100101China Spatial Sciences Institute University of Southern CaliforniaLos AngelesCA 90089-0374USA

Various investigations have been conducted to analyze the water-coverage area of the Aral Sea and the Aral Sea Basin(ASB). However, the investigations incorporated considerable uncertainty and the used water indices had misclassification problem, which made different research groups present different results. Thus we first ascertain the boundaries of the ASB, the Syr and Amu river basins as well as their upper, middle and lower reaches. Then a four-band index for both liquid and solid water(ILSW) is proposed to address the misclassification problems of the classic water indices. ILSW is calculated by using the reflectance values of the green, red, near infrared, and thermal infrared bands, which combines the normalized difference water index(NDWI) and land surface temperature(LST) together. Validation results show that the ILSW water index has the highest accuracy by far in the Aral Sea Basin. Our results indicate that annual average decline of the water-coverage area was 963 km^(2) in the southern Aral Sea, whereas the northern Aral Sea has experienced little change. In the meanwhile, permanent ice and snow in upper reach of ASB has retreated considerably. Annual retreating rates of the permanent ice and snow were respectively 6233and 3841 km^(2) in upper reaches of Amu river basin(UARB) and Syr river basin(USRB). One of major reasons is that climate has become warmer in ASB. The climate change has caused serious water deficit problem. The water deficit had an increasing trend since the 1990s and its increasing rates was 3.778 billion m^(3) yearly on average. The total water deficit was 76.967 billion m^(3) on average in the whole area of ASB in the 2010s. However, up reaches of Syr river basin(USRB), a component area of ASB, had water surplus of 25.461 billion m^(3). These conclusions are useful for setting out a sustainable development strategy in ASB.

关键词： Aral Sea Basin Syr river basin Amu river basin Water indices Water-coverage area Water deficit Climate change

Imaging Carotid Plaque Burden in Living Mice via Hybrid Semiconducting Polymer Nanoparticles-Based Near-Infrared-II Fluorescence and Magnetic Resonance Imaging

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Research 2024年第3期2023卷 71-81页

作者： Li Xu Zhe Li Yuan Ma Lingling Lei Renye Yue Hui Cao shuangyan Huan Wei Sun Guosheng Song State Key Laboratory for Chemo/Bio-Sensing and Chemometrics College of Chemistry and Chemical EngineeringEngineeringHunan UniversityChangsha 410082China. Key Laboratory of Targeted Intervention of Cardiovascular Disease Collaborative Innovation Center for Cardiovascular Disease Translational MedicineNanjingMedical University Department of Cardiology The First Affiliated Hospital of Nanjing Medical UniversityNanjing Medical UniversityNanjing 210029JiangsuChina.

The majority of atherothrombotic events (e.g., cerebral or myocardial infarction) often occur as a result of plaque rupture or erosion in the carotid, and thereby it is urgent to assess plaque vulnerability and predict adverse cerebrovascular events. However, the monitoring evolution from stable plaque into life-threatening high-risk plaque in the slender carotid artery is a great challenge, due to not enough spatial resolution for imaging the carotid artery based on most of reported fluorescent probes. Herein, copolymerizing with the small molecules of acceptor-donor-acceptor-donor-acceptor (A-D-A′-D-A) and the electron-donating units (D′), the screened second near-infrared (NIR-II) nanoprobe presents high quantum yield and good stability, so that it enables to image slender carotid vessel with enough spatial resolution. Encouragingly, NIR-II nanoprobe can effectively target to intraplaque macrophage, meanwhile distinguishing vulnerable plaque in carotid atherosclerosis in living mice. Moreover, the NIR-II nanoprobe can dynamically monitor the fresh bleeding spots in carotid plaque, indicating the increased risk of plaque instability. Besides, magnetic resonance imaging is integrated with NIR-II fluorescence imaging to provide contrast for subtle structure (e.g., narrow lumen and lipid pool), via incorporating ultrasmall superparamagnetic iron oxide into the NIR-II nanoprobe. Thus, such hybrid NIR-II/magnetic resonance imaging multimodal nanoprobe provides an effective tool for assessing carotid plaque burden, selecting high-risk plaque, and imaging intraplaque hemorrhage, which is promising for reducing cerebral/ myocardial infarction-associated morbidity and mortality.

关键词： enough conducting Infrared

MJO与北半球高纬地区冬季地表气温异常的联系

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气象 2021年第1期47卷 49-59页

作者：崔静杨双艳 LI Tim 南京信息工程大学气象灾害教育部重点实验室/气候与环境变化国际合作联合实验室/气象灾害预报预警与评估协同创新中心南京210044 夏威夷大学国际太平洋研究中心美国夏威夷

基于1979—2016年NCEP-NCAR逐日再分析资料研究了热带季节内振荡(MJO)和北半球冬季高纬地区地表气温(SAT)之间的联系。利用实时多变量MJO(RMM)指数,将MJO分为8个位相,其中位相2(位相6)对应于位于印度洋地区的正(负)对流。不同MJO位相下... 详细信息

基于1979—2016年NCEP-NCAR逐日再分析资料研究了热带季节内振荡(MJO)和北半球冬季高纬地区地表气温(SAT)之间的联系。利用实时多变量MJO(RMM)指数,将MJO分为8个位相,其中位相2(位相6)对应于位于印度洋地区的正(负)对流。不同MJO位相下的SAT合成结果显示MJO第二位相后的5~15 d,北半球高纬地区(60°~90°N、180°~60°W)有明显的负SAT异常;由于热带异常加热信号的改变,在MJO第六位相后的5~15 d该地区则对应于显著的正SAT异常。该地区温度的垂直结构在各个位相下也表现出类似的分布特征。合成的500 hPa位势高度异常场显示,在温度负(正)异常的位相对应有明显的位势高度负(正)异常,这种环流异常主要是由与热带对流异常相联系的向东北方向传播的罗斯贝波列所引起的。通过对波活动通量的计算,推断该东北方向传播的罗斯贝波列很可能是罗斯贝波能量频散的结果。合成的700 hPa比湿异常场和SAT之间在存在着较好的对应关系,考虑到对流层中层的比湿与向下长波辐射之间存在着正相关关系,说明该温度异常也可能与辐射过程相关。上述分析表明与MJO对流相关的大尺度环流异常对高纬地区季节内SAT变率有重要影响,该异常SAT信号可能来自平流输送和辐射过程等。准确把握MJO位相与SAT异常信号的联系也可以为北半球高纬地区SAT的延伸期预报提供一些可靠线索。

关键词： MJO 地表气温罗斯贝波列波活动通量

中高纬大气ISO对夏季鄂海阻高形成和维持的调节作用

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大气科学学报 2020年第1期43卷 104-115页

作者：杨双艳李天明南京信息工程大学气象灾害教育部重点实验室/气候与环境变化国际合作联合实验室/气象灾害预报预警与评估协同创新中心江苏南京210044 夏威夷大学马诺阿分校大气科学学院国际太平洋研究中心檀香山夏威夷96822

运用1979—2015年的逐日NCEP-DOE再分析资料,探讨了夏季鄂霍次克海阻塞高压(简称“鄂海阻高”)与中高纬大气季节内振荡(简称“ISO”)之间的可能联系。研究发现,ISO扰动与夏季鄂海阻高在关键区(130°~160°E,60°~75°N)有最好的耦合关系... 详细信息

运用1979—2015年的逐日NCEP-DOE再分析资料,探讨了夏季鄂霍次克海阻塞高压(简称“鄂海阻高”)与中高纬大气季节内振荡(简称“ISO”)之间的可能联系。研究发现,ISO扰动与夏季鄂海阻高在关键区(130°~160°E,60°~75°N)有最好的耦合关系,且关键区位势高度表现出显著的10~30 d的振荡周期。超前滞后合成分析表明,与鄂海阻高相联系的ISO扰动具有明显的向西传播的特征。波活动通量分析结果显示,波能量在中高纬140°W附近累积,因此西传的ISO扰动可能源自中高纬140°W附近。对位势倾向方程的诊断结果显示,动力作用对关键区位势高度的时间变化起主要作用。进一步运用尺度分析表明,在夏季鄂海阻高发生和维持的过程中,ISO经向风引导的平均涡度平流对位势高度的时间变化起主导作用。

关键词：鄂海阻高中高纬季节内振荡波活动通量位势倾向诊断