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Record-breaking High-temperature Outlook for 2023: An Assessment Based on the China Global Merged Temperature(CMST) Dataset

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Advances in Atmospheric Sciences 2024年第2期41卷 369-376页

作者： Zichen li qingxiang li Tianyi CHEN School of Atmospheric Sciences and Guangdong Province Key Laboratory for Climate Change and Natural Disasters SUN Yat-Sen UniversityZhuhai 519082China Research Center for Ecology and Environment of Central Asia Chinese Academy of SciencesUrumqi 830011China Southern Laboratory of Ocean Science and Engineering(Guangdong Zhuhai) Zhuhai 519082China

According to the latest version(version 2.0) of the China global Merged Surface Temperature(CMST2.0) dataset, the global mean surface temperature(GMST) in the first half of 2023 reached its third warmest value since the period of instrumental observation began, being only slightly lower than the values recorded in 2016 and 2020, and historically record-breaking GMST emerged from May to July 2023. Further analysis also indicates that if the surface temperature in the last five months of 2023 approaches the average level of the past five years, the annual average surface temperature anomaly in 2023 of approximately 1.26°C will break the previous highest surface temperature, which was recorded in 2016of approximately 1.25°C(both values relative to the global pre-industrialization period, i.e., the average value from 1850 to1900). With El Ni?o triggering a record-breaking hottest July, record-breaking average annual temperatures will most likely become a reality in 2023.

关键词： CMST2.0 global mean surface temperature record-breaking temperature El Ni?o

A New Method for Quality Control of Chinese Rawinsonde Wind Observations

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Advances in Atmospheric Sciences 2014年第6期31卷 1293-1304页

作者： liAO Jie WANG Bin li qingxiang State Key Laboratory of Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric Physics Chinese Academy of Sciences University of Chinese Academy of Sciences National Meteorological Information Center

In 2006,the National Meteorological Information Center （NMIC） of the China Meteorological Administration （CMA） developed its real-time quality control （QC） system of rawinsonde observations coming from the Global Telecommunications System （GTS） and established the Global Upper-air Report Dataset,which,with the NMIC B01 format,is generally referred to as the B01 dataset and updated on a daily ***,when the B01 dataset is applied in climate analysis,some wind errors as well as some accurate values with incorrect error marks are *** improve the quality and usefulness of Chinese rawinsonde wind observations,a new QC method （NewQC） is proposed in this *** from the QC approach used for B01 datasets,the NewQC includes two vertical-wind-shear checks to analyze the vertical consistency of winds,in which the constant height level winds are used as reference data for the QC of mandatory pressure level *** threshold values are adopted in the wind shear checks for different stations and different vertical *** typical examples of QC of different error types by the new algorithm are shown and its performance with respect to 1980-2008 observational data is statistically *** with the radiosonde QC algorithms used in both the Meteorological Assimilation Data Ingest System （MADIS,http：//***/madis_raob_***） of the National Oceanic and Atmospheric Administration （NOAA） and the B01 dataset,the NewQC shows higher accuracy and better reliability,particularly when used to judge successive observation errors.

关键词： quality control rawinsonde observation vertical-wind-shear check

Drag reduction of turbulent channel flows over an anisotropic porous wall with reduced spanwise permeability

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Applied Mathematics and Mechanics(English Edition) 2019年第7期40卷 1041-1052页

作者： qingxiang li Ming PAN Quan ZHOU Yuhong DONG Shanghai Institute of Applied Mathematics and Mechanics Shanghai University Shanghai 200072 China Shanghai Key Laboratory of Mechanics in Energy Engineering Shanghai University Shanghai 200072 China

The direct numerical simulation (DNS) is carried out for the incompressible viscous turbulent flows over an anisotropic porous wall. Effects of the anisotropic porous wall on turbulence modifications as well as on the turbulent drag reduction are investigated. The simulation is carried out at a friction Reynolds number of 180, which is based on the averaged friction velocity at the interface between the porous medium and the clear fluid domain. The depth of the porous layer ranges from 0.9 to 54 viscous units. The permeability in the spanwise direction is set to be lower than the other directions in the present simulation. The maximum drag reduction obtained is about 15.3% which occurs for a depth of 9 viscous units. The increasing of drag is addressed when the depth of the porous layer is more than 25 wall units. The thinner porous layer restricts the spanwise extension of the streamwise vortices which suppresses the bursting events near the wall. However, for the thicker porous layer, the wall-normal fluctuations are enhanced due to the weakening of the wall-blocking effect which can trigger strong turbulent structures near the wall.

关键词： direct numerical simulation (DNS) anisotropic porous medium drag reduction turbulent open channel flow

Mechanical Properties of PPV Film in Thermal Elimination Process

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Chemical Research in Chinese Universities 2014年第4期30卷 698-701页

作者： li Qlngsong YANG qingxiang ZHANG Haiquan State Key Laboratory of Metastable Materials Science and Technology Yanshan University Qinhuangdao 066004 P. R. China

This paper deals with the relationships between the structure of poly（p-phenylene vinylene）（PPV） film and treatment temperature and their mechanical *** chemical structures and aggregated structures of PPV precursor（PPVpre） and PPV treated at three node temperatures（125,155 and 230 ℃） were investigated by FTIR spectrometry and X-ray *** results show that the content of trans-conformation and the size of the crystalline domains increased with the increase of treatment *** mechanical performances of the corresponding polymers were studied by *** elastic modulus and hardness of PPV films decreased with the increases of the content of trans-conformation and the size of the crystalline *** results suggest that the conformation and the size of the crystalline domains are able to induce the elastic modulus and hardness variation of PPV films.

关键词： Poly(p-phenylene vinylene) Thermal elimination Conformation Crystalline Mechanical performance

Global land-surface air temperature change based on the new CMA GLSAT data set

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Science Bulletin 2017年第4期62卷 236-238页

作者： Xiubao Sun Guoyu Ren Wenhui Xu qingxiang li Yuyu Ren College of Atmospheric Science Nanjing University of Information Science & TechnologyNanjing 210044China Department of Atmospheric Science School of Environmental StudiesChina University of GeosciencesWuhan 430074China Laboratory for Climate Studies National Climate CenterChina Meteorological AdministrationBeijing 100081 Chinad National Meteorological Information Center China Meteorological AdministrationBeijing 100081China

The China Meteorological Administration(CMA)has recently developed a new global monthly homogenized land-surface air temperature data *** on this data set,we reanalyzed the change in global annual mean land-surface air temperature(LSAT)during three time periods(1901–2014,1979–2014 and 1998–2014).The results show that the linear trends of global annual mean LSAT were 0.104°C/decade,0.247°C/decade and 0.098°C/decade for the three periods,*** trends were statistically significant except for the period 1998–2014,the period that

关键词：地表气温数据集 CMA 气温变化豪华型中国气象局

Assessment of the uncertainties in temperature change in China during the last century

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Chinese Science Bulletin 2010年第19期55卷 1974-1982页

作者： li qingxiang DONG WenJie li Wei GAO XiaoRong JONES P KENNEDY J PARKER D National Meteorological Information Center Beijing 100081 China Beijing Normal University Laboratory of Surface Process and Resources Economies Beijing 100875 China National Meteorological Center Beijing 100081 China Climatic Research Unit School of Environmental Sciences University of East Anglia Norwich NR4 7TJ UK Met Office Hadley Centre Exeter EX1 3PB UK

We have used the China Homogenized Historic Temperature dataset and some long-term station series of the neighbor countries from CRUTEM3,a 5°×5° gridded dataset of monthly mean temperature since 1900,to provide a 107-year record of surface temperature trends and *** derived a comprehensive set of uncertainty estimates to accompany the data:measurement and sampling errors,uncertainties in temperature bias estimates,and uncertainties arising from limited observational coverage on large-scale averages have all been *** reanalysed the temperature changes during the period of *** best estimates of trends for 1900-2006 with uncertainties at 95% confidence range are about 0.09±0.017°C/decade for the year as a whole,and 0.14±0.021°C/decade,0.11±0.021°C/decade,0.04±0.017°C/decade,and 0.07±0.017°C/decade for winter,spring,summer and autumn *** 1954-2006,the trends for annual,winter,spring,summer and autumn are:0.26±0.032°C/decade,0.35±0.046°C/decade,0.25±0.051°C/decade,0.16±0.037°C/decade and 0.22±0.055°C/*** saw the most significant warming trend in both 1900-2006 and 1954-2006,while during the most recent period(the satellite era,1979-2006),all the seasons show similar warming trends:0.45±0.13°C/decade,0.51±0.11°C/decade,0.52±0.16°C/decade,0.37±0.10°C/decade and 0.50±0.16°C/decade for annual,winter,spring,summer and *** arising from urbanization have been evaluated as less than 5% of the total warming trend for 1951-2001,so this bias was not removed.

关键词：不确定性温度变化中国历史评估变暖趋势偏差估计月平均温度抽样误差

Oral administration of Bifidobacterium breve improves anti-angiogenic drugs-derived oral mucosal wound healing impairment via upregulation of interleukin-10

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International Journal of Oral Science 2023年第4期15卷 718-728页

作者： qingxiang li Yuke li Qiao Qiao Ning Zhao Yuanning Yang lin Wang Yifei Wang Chuanbin Guo Yuxing Guo Department of Oral and Maxillofacial Surgery Peking University School and Hospital of Stomatology&National Clinical Research Center for Oral Diseases&National Engineering Laboratory for Digital and Material Technology of Stomatology&Beijing Key Laboratory of Digital StomatologyPeking University School and Hospital of StomatologyBeijingChina

Recent studies have suggested that long-term application of anti-angiogenic drugs may impair oral mucosal wound *** study investigated the effect of sunitinib on oral mucosal healing impairment in mice and the therapeutic potential of Bifidobacterium breve(***).A mouse hard palate mucosal defect model was used to investigate the influence of sunitinib and/or zoledronate on wound *** volume and density of the bone under the mucosal defect were assessed by micro-computed tomography(micro-CT).Inflammatory factors were detected by protein microarray analysis and enzyme-linked immunosorbent assay(EliSA).The senescence and biological functions were tested in oral mucosal stem cells(OMSCs)treated with *** loop experiments were used to investigate the effect of oral *** antibody for interleukin-10(IL-10)was used to prove the critical role of IL-10 in the pro-healing process derived from *** showed that sunitinib caused oral mucosal wound healing impairment in *** vitro,sunitinib induced cellular senescence in OMSCs and affected biological functions such as proliferation,migration,and *** administration of *** reduced oral mucosal inflammation and promoted wound healing via intestinal dendritic cells(DCs)-derived ***-10 reversed cellular senescence caused by sunitinib in OMSCs,and IL-10 neutralizing antibody blocked the ameliorative effect of *** on oral mucosal wound healing under sunitinib treatment *** conclusion,sunitinib induces cellular senescence in OMSCs and causes oral mucosal wound healing impairment and oral administration of *** could improve wound healing impairment via intestinal DCs-derived IL-10.

关键词： healing wound mucosal

The Assessment of Global Surface Temperature Change from 1850s:The C-LSAT2.0 Ensemble and the CMST-Interim Datasets

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Advances in Atmospheric Sciences 2021年第5期38卷 875-888页

作者： Wenbin SUN qingxiang li Boyin HUANG Jiayi CHENG Zhaoyang SONG Haiyan li Wenjie DONG Panmao ZHAI Phil JONES School of Atmospheric Sciences and Key Laboratory of Tropical Atmosphere−Ocean System Ministry of EducationZhuhai 519082China National Centers for Environmental Information NOAAAshevilleNC 28801USA Chinese Academy of Meteorological Sciences CMABeijing 100081China Climatic Research Unit University of East AngliaNorwich NR47TJUK Southern Laboratory of Ocean Science and Engineering(Guangdong Zhuhai) Zhuhai 519082China

Based on C-LSAT2.0,using high-and low-frequency components reconstruction methods,combined with observation constraint masking,a reconstructed C-LSAT2.0 with 756 ensemble members from the 1850s to 2018 has been *** ensemble versions have been merged with the ERSSTv5 ensemble dataset,and an upgraded version of the CMSTInterim dataset with 5°×5°resolution has been *** CMST-Interim dataset has significantly improved the coverage rate of global surface temperature *** reconstruction,the data coverage before 1950 increased from 78%−81%of the original CMST to 81%−89%.The total coverage after 1955 reached about 93%,including more than 98%in the Northern Hemisphere and 81%−89%in the Southern *** the reconstruction ensemble experiments with different parameters,a good basis is provided for more systematic uncertainty assessment of C-LSAT2.0 and *** comparison with the original CMST,the global mean surface temperatures are estimated to be cooler in the second half of 19th century and warmer during the 21st century,which shows that the global warming trend is further *** global warming trends are updated from 0.085±0.004℃(10 yr)^(–1)and 0.128±0.006℃(10 yr)^(–1)to 0.089±0.004℃(10 yr)^(–1)and 0.137±0.007℃(10 yr)^(–1),respectively,since the start and the second half of 20th century.

关键词： C-LSAT2.0 ensemble datasets CMST-Interim EOTs high-and low-frequency components reconstruction

Development of China homogenized monthly precipitation dataset during 1900-2009

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Journal of Geographical Sciences 2012年第4期22卷 579-593页

作者： li qingxiang PENG Jiadong SHEN Yan National Meteorological Information Center Beijing 100081China Hunan Provincial Climate Center Changsha 410125China

Based on the collection and processing of the China national-wide monthly station observational precipitation data in 1900-2009, the data series for each station has been tested for their homogeneity with the Standard Normalized Homogeneity Test （SNHT） method and the inhomogeneous parts of the series are adjusted or corrected. Based on the data, the precipitation anomalies during 1900-2009 and the climatology normals during 1971-2000 have been transformed into the grid boxes at 5°×5° and 2°×2° resolutions respectively. And two grid form datasets are constructed by combining the normal and anomalies. After that, the missing values for the 5°×5° grid dataset are interpolated by Empirical Orthogonal Function （EOF） techniques. With the datasets of different resolutions, the precipitation change series during 1900-2009 over China's Mainland are built, and the annual and seasonal precipitation trends for the recent 110 years are analyzed. The result indicates that the annual precipitation shows a slight dryer trend during the past 110 years, notwithstanding lack of statistical confidence. It is worth noting that after the interpolation of the missing values, the annual precipitation amounts in the early 1900s become less, which increases the changing trend of the annual precipitation in China for the whole 110 years slightly （from -7.48 mm/100a to -6.48 mm/100a）.

关键词： precipitation dataset homogeneity interpolation