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| 1 | Trend analysis of sediment grain size and sedimentary process in the central South Yellow Sea显示文摘With the method of trend analysis of sediment grain size, the sediment transport trend of the fine-grained sediments area in the central South Yellow Sea was studied. The results demonstrated that there is a sedimentation center around the point of 123.4° E, 35.1°N, and the sediments outside the center are transported to it. The patterns of sediment transportation and deposition in the Yellow Sea should be controlled by cyclonic circulation (including the Yellow Sea Cold Water Mass) and cold water gyre. The study also showed that the method of trend analysis of sediment grain size has prospective utilization in the fine-grained sediment deposited area on large-scale continental shelf. | SHI Xuefa CHEN Chunfeng LIU Yanguang REN Hong WANG Huiyan | 2002 | Chinese Science Bulletin2002，47，14： | 17 |
| 2 | 基于Hurst指数的1982–2013年蒙古高原植被动态变化趋势及其影响因素分析(英文)显示文摘This study analyzed the spatial and temporal variations in the Normalized Difference Vegetation Index(NDVI) on the Mongolian Plateau from 1982–2013 using Global Inventory Modeling and Mapping Studies(GIMMS) NDVI3 g data and explored the effects of climate factors and human activities on vegetation. The results indicate that NDVI has slight upward trend in the Mongolian Plateau over the last 32 years. The area in which NDVI increased was much larger than that in which it decreased. Increased NDVI was primarily distributed in the southern part of the plateau, especially in the agro-pastoral ecotone of Inner Mongolia. Improvement in the vegetative cover is predicted for a larger area compared to that in which degradation is predicted based on Hurst exponent analysis. The NDVI-indicated vegetation growth in the Mongolian Plateau is a combined result of climate variations and human activities. Specifically, the precipitation has been the dominant factor and the recent human effort in protecting the ecological environments has left readily detectable imprints in the NDVI data series. | 佟斯琴 张继权 包玉海 来全 连晓 丽娜 包勇斌 | 2018 | Journal of Geographical Sciences2018，28，5： | 11 |
| 3 | Regional soil moisture simulation for Shaanxi Province using SWAT model validation and trend analysis显示文摘The soil moisture in Shaanxi Province,a region with complex topography,is simulated using the distributed hydrological model Soil Water Assessment Tool(SWAT).Comparison and contrast of modeled and observed soil moisture show that the SWAT model can reasonably simulate the long-term trend in soil moisture and the spatiotemporal variability of soil moisture in the region.Comparisons to NCEP/NCAR and ERA40 reanalysis of soil moisture show that the trend of variability in soil moisture simulated by SWAT is more consistent with the observed.SWAT model results suggested that high soil moisture in surface soil layers appears in the southern Shaanxi with high vegetation cover,and the Qinling mountainous region with frequent orographic precipitation.In deeper soil layers,high soil moisture appears in the river basins and plains.The regional soil moisture showed a generally decreasing trend on all soil layers from 1951 to 2004,with a stronger and significant decreasing trend in deeper soil layers,especially in the northern parts of the province. | LI MingXing1,2,MA ZhuGuo1 & DU JiWen3 1 Key Laboratory of Regional Climate-Environment Research for Temperate East Asia,Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029,China 2 Graduate University of Chinese Academy of Sciences,Beijing 100049,China 3 Shaanxi Administration of Meteorology,Xi’an 710014,China | 2010 | Science China Earth Sciences2010，53，4： | 9 |
| 4 | 基于多元统计分析的水环境质量评价及趋势分析显示文摘用因子分析的方法,找出影响水质的主成分;用聚类分析的方法将样本水质分类,结合分类结果对各样本水质进行评价;用秩相关系数检验法作污染趋势分析.作为上述方法的应用,对淮河淮安段2006~2007年的水质进行分析评价并对其作污染趋势分析,结果表明:影响淮河水质的因素依次为NH4-N、TN、CODCr、CODMn及DO等;而淮河淮安段的水质在逐渐好转. | 蒋同斌 李继玲 | 2010 | 南京师范大学学报(工程技术版)2010，10，4： | 4 |
| 5 | VARIATIONS OF CLOUD FRACTION OVER EAST ASIA UNDER GLOBAL WARMING CONDITIONS IN THE PAST 20 YEARS显示文摘Based on the variation of cloud fraction revealed by D2 Cloud Climatic Data of the InternationalSatellite Cloud Climatology Project and trend analysis methods, the trend of different types of cloud fractionover East Asia during 1984-2006 is obtained. The analysis focuses on the relationship between temperatureand different cloud fraction under the background of globe warming. The result shows a fluctuatingdecreasing tendency in the total cloud fraction, high-level cloud and low-level cloud over East Asia with thedecrement being 2.24%, 1.65% and 1.68%, respectively, while the mid-level cloud increases by 1.07%. Inaddition, there are great regional differences in cloud fraction. Temperature and water-vapor contentvariation caused by the greenhouse effects over East Asia is the primary reason for the variation of cloudfraction. Over the Tibetan Plateau, the Bay of Bengal and the Intertropical Convergence Zone, thetemperature is negatively correlated with high-level cloud, but positively correlated with mid- and low-levelcloud. However, over the West Pacific and the ocean east and north of Japan, the temperature is negativelycorrelated with low-level cloud but positively correlated with high-level cloud. | 吴涧 刘佳 | 2013 | Journal of Tropical Meteorology2013，19，2： | 1 |
| 6 | Reference evapotranspiration concentration and its relationship with precipitation concentration at southern and northern slopes of Tianshan Mountains, China显示文摘The investigation of concentration characteristics of reference evapotranspiration(ETref) is important for water resources management. The concentration index(CI), concentration degree(CD) and concentration period(CP) are used to investigate the concentration characteristics of ETref and the relationship between ETref concentration and precipitation concentration at sub-monthly timescale based on the daily climatic variables from 1966 to 2015 in 27 meteorological stations at the southern and northern slopes of Tianshan Mountains in China. It was found that the CI of ETref is about 0.40 and less concentrated than precipitation in the study area. At the southern slope, the maximum ETref appears in late June and is earlier than the maximum precipitation(early July), ETref distributes more equally than precipitation, and the CI, CD and CP of these two variables do not show significant change based on the Mann–Kendall test. At the northern slope, both the maximum ETref and precipitation appear in early July, and ETref is more dispersed than precipitation. During the study period, the maximum ETref at the northern slope tends to appear earlier due to the impacts of wind speed, relative humidity, sunshine duration, and air temperature. ETref concentration does not match the precipitation concentration in the study area, particularly at the southern slope. The mismatch between ETref and precipitation concentration within a year reveals the water resources pressure on environmental, social and economic sustainability in the study area. | HUANG Fa-rong YANG Tao LI Qian LI Si-si LI Lan-hai Suwannee ADSAVAKULCHAI | 2019 | Journal of Mountain Science2019，16，6： | 1 |
| 7 | Space-time analysis of the changing patterns of population pressure on the ecological environment in China显示文摘This paper examines the temporal change and spatial variation of population pressure on the ecological environment in China.We have collected sufficient data from the statistical yearbooks of 31 provincial administrative areas in 1990,1995,2000,2005,and 2010.Using a geographic information system(GIS) and relevant models,we analyzed the trend of the population pressure on ecological environment and the change of the gravity center of ecological environment quality.We conclude that:(1) generally,population pressure on the ecological environment in China was becoming higher during1990-2010,especially in some areas where the population and environment were in serious imbalance and the ecological environment experienced severe pollution;(2) during a certain period,population pressure on the ecological environment was becoming lower in some areas,but the ecological environment was getting worse;(3) the areas with super-high population pressure on the ecological environment were Beijing,Tianjin,and Shanghai;(4) the gravity center of population pressure on the ecological environment and the center of ecological environment quality move differently during the study time period,but the general trend was similar- both of them were moving from west to east.Based on the analysis,this paper also provides some policy suggestions on the control of ecological environment quality. | Dongqi Sun Jinliang Jiang Jianbin Xu Liang Zhou Yi Hu | 2015 | Chinese Journal of Population,Resources and Environment2015，13，4： | 1 |
| 8 | ZONALITY OF DISTRIBUTION OF PHYSICO-GEOGRAPHICAL ZONES IN CHINA显示文摘With the methods of regression analysis and trend surface analysis, taking the bottom and top lines of dark conifer forest, bottom line of permafrost and the snowline of the latest glaciation in China as examples, this paper discusses the zonality regulaties of the distribution of physico-geographical zones in China. (1) Latitude zonality obeys the mathematical model of normal frequency distribution, being approximate to descending straightly within the latitude of China. (2) Longitude zonality shows that the elevation of physico-geographical zone rises straightly with the distance to east coast. (3) The combination of latitude and longitude zonalities appears a plane inclining from SSW to NNE. The decline of physico-geographical zone resembles a semiellipse- sphere inclining from the Qinghai-Xizang (Tibet) Plateau to northeast China, reflecting the effect of relief. (5) Physico-geographical zonation depends on the combination of hydrothermal conditions. Thus the factors influencing the distribution | 蒋忠信 | 1993 | Chinese Geographical Science1993，3，4： | 1 |
| 9 | Estimating trends of the Mediterranean Sea level changes from tide gauge and satellite altimetry data (1993-2015)显示文摘The impact of climate change on sea level has received a great deal of attention by scientists worldwide. In this context, the problem of sea levels on global and regional scales have been analyzed in a number of studies based on tide gauges observations and satellite altimetry measurements. This study focuses on trend estimates from 18 high-quality tide gauge stations along the Mediterranean Sea coast. The seasonal Mann-Kendall test was run at a 5% significance level for each of the 18 stations for the period of 1993-2015 (satellite altimetry era). The results of this test indicate that the trends for 17 stations were statistically significant and showed an increase (no significant trend was observed only at one station). The rates of sea level change for the 17 stations that exhibit significant trends, estimated using seasonal Sen's approach, range after correction for Vertical Land Motion (VLM) from 1.48 to 8.72 mm/a for the period 1993-2015. Furthermore, the magnitude of change at the location of each tide gauge station was estimated using the satellite altimetry measurements. Thus, the results obtained agree with those from the tide-gauge data analysis. | TAIBI Hebib HADDAD Mahdi | 2019 | Journal of Oceanology and Limnology2019，37，4： | 0 |
| 10 | Dynamic antimicrobial resistant patterns of Escherichia coli from healthy poultry and swine over 10 years in Chongming Island,Shanghai显示文摘Background:Antimicrobial resistance(AMR)is one of the greatest threats to animal and public health.Here,we conducted a dynamic surveillance of Escherichia coli on Chongming Island in Shanghai during 2009-2021 to identify the characteristics and trends of Chongming’s AMR pandemic.Methods:Rectal(cloaca)swabs from four poultry and nine swine farms(Chongming Island,2009-2021)were collected for E.coli strains acquisition.The micro-broth dilution method was used to test antimicrobial susceptibility of E.coli isolates against 10 antimicrobial classes including 15 antimicrobials.Utilizing generalized linear mixed models(GLMMs)and co-occurrence analyses,we further explored the multiple-drug-resistance(MDR)combinations and dynamic patterns of E.coli over 10 years in two food animals.Results:Total of 863 MDR isolates were found among 945 collected E.coli isolates,337 from poultry and 608 from swine.Both isolates exhibited high resistant rates(>70%)to tetracyclines,phenicols,sulfonamides,penicillins,and aminoglycosides(only in swine).The resistant rates of swine isolates to penicillins,aminoglycosides,tetracyclines,phenicols,and polymyxins were significantly higher than those of poultry isolates,whereas resistance to fluoroquinolones was reversed.Resistance to polymyxins decreased similarly in swine(42.4%in 2009 to 0.0%in 2021)and poultry isolates(from 16.5%to 0.0%).However,resistance to other seven antimicrobial classes(excluding carbapenems and penicillins)declined dramatically in swine isolates,particularly fluoroquinolones(from 80.5%to 14.4%),and tendencies of resistance to the seven classes showed markedly divergent patterns in poultry isolates.Using Poisson GLMMs,the AMR carriage since 2016 was significantly lower than that of 2009(odds ratio<1),indicating a decline in the risk of MDR emergence.Furthermore,despite the highly diverse MDR profiles,co-occurrence analysis identified two prominent MDR clusters of penicillins-phenicols-fluoroquinolones in poultry and aminoglycosides-tetracyclines-sulfonamides-phenicols in swine.Conclusions:Our study uncovered vastly distinct AMR patterns and dynamic tendencies of poultry and swine E.coli isolates from Chongming.Meanwhile,Chongming’s AMR status has ameliorated,as indicated by the decline in antimicrobials prevalence(particularly in swine),lower likelihood of MDR emergence and low carbapenem-,cephalosporin-,and polymyxin resistance.Importantly,this surveillance results are the vital basis for future policy development in Chongming and Shanghai. | Chao Lv Jun Shang Wengang Zhang Bingqing Sun Min Li Chaoyi Guo Nan Zhou Xiaokui Guo Shixin Huang Yongzhang Zhu | 2022 | Infectious Diseases of Poverty2022，11，5： | 0 |
| 11 | Sediment transport trends and cross-sectional stability of a lagoonal tidal inlet on the Central Coast of Vietnam显示文摘Lagoonal tidal inlets are a typical morphology of the Central Coast of Vietnam. Recently, navigation channels in these inlets have become increasingly threatened by siltation. This study analyses the relations between sediment distribution and transport trends (using the technique of Sediment Trend Analysis-STA■) in the lagoonal system of the De Gi inlet and then proposes appropriate countermeasures against sand deposition in the navigation channel. The STA identified three types of transport trends in the De Gi inlet, namely dynamic equilibrium, net accretion, and net erosion. Processes associated with the tidal prism have resulted in trends of sediment transport and deposition across the flood and ebb tidal shoals, which maintain a present cross-sectional area of about 1000m^2. However, longshore sediment transport from north to south resulting from northeast waves cause additional sand deposition in the channel. In addition, the effects of refraction associated with a nearby headland and jetty also increase sedimentation. These processes provide the main reasons for sediment deposition in the De Gi inlet. Short term and regular dredging helps to maintain the navigation channel. A system comprised of three jetties (north, south, and weir) is necessary to ensure the longterm cross-sectional stability of the navigation channel. | Do Minh Duc Tran Thanh Tung Patrick McLaren Tran Ngoc Anh Dinh Thi Quynh | 2019 | International Journal of Sediment Research2019，34，4： | 0 |
| 12 | Research on the spectral analysis and testmethod of period signals in monthly mean sea level显示文摘Researchonthespectralanalysisandtestmethodofperiodsignalsinmonthlymeansealevel￥MaJirui;TianSuzhen;ZhengWenzhenandChaiXinmin(R... | Ma Jirui Tian Suzhen Zheng Wenzhen and Chai Xinmin (Institute of Marine Scientific and Technological Information, State Oceanic Administration, Tianjin 300171, China Research Institute of Marine Strategies, State Oceanic Administration, Beijing 100081, C | 1995 | Acta Oceanologica Sinica1995，14，2： | 0 |
| 13 | Trend analysis of relative sea level rise or fall of the tide gauge stations in the Pacific显示文摘TrendanalysisofrelativesealevelriseorfallofthetidegaugestationsinthePacific￥MaJirui;TianSuzhen;ZhengWenzhenandChaiXinminInsit... | Ma Jirui Tian Suzhen Zheng Wenzhen and Chai XinminInsitute of Marine Scientific and Technological Information, State Ocedc Administration, Tianjing 300171, China)(Research Institute Of Marine Strategies, State Oceanic Administration,Beijing 100081, China | 1995 | Acta Oceanologica Sinica1995，14，3： | 0 |
| 14 | Analysis of Rainfall Trend and the Variation in Number of Rain Days in A Tropical Station显示文摘Rainfall trend analysis has asupreme role for forecasting the rain events,which is very vital for tropics where the fluctuation in occurrence of rainfall is widespread.The local level rainfall trend analysis on the other side provides valuable information to cope up with the vehemence of global climate changes.The present study analyses the trend in the rainfall and number of rain days in a tropical town ship,Pattambi,located in the Bharathapuzha River basin of Kerala state of India.We used Man-Kendall rank correlation statistics to see the variations | Nikhil Raj | 2009 | 地学前缘2009，16，S1： | 0 |
| 15 | TREND SURFACE ANALYSIS OF THE EXISTENT SNOWLINE IN WEST CHINA显示文摘The analysis of twenty five existent snowline elevation values in West China indicates that snowline elevationH (meter) presents zonality change declining from south to north with latitude φ(degree) and the change declining from west to east with longitude which relates to the distance L (kilometer) to the east coastline. Therefore, the first order trend surface equation of the snowline in West China shows a plane incline from southwest to northeast. The second order trend surface equation of the snowline in West China truly represents the distribution law of the snowline in West China. Its form resembles a 'overturned anticline' from southwest to northeast. The 'raised axis' seems to be superimposed upon the first order trend surface.It reflects the effect of the relief. The snowline elevation in West China depends on horizontal zonality,distribution of ocean and land,and the relief. | 蒋忠信 | 1991 | Chinese Geographical Science1991，1，1： | 0 |
| 16 | Spatial distribution analysis on climatic variables in northeast China显示文摘Information ecology is a new research area of modern ecology. Here describes the spatial distribution analysis methods of four sorts of climatic variables, i.e. temperature, precipitation, relative humidity and sunshine fraction in Northeast China. First, digital terrain models was built with large scale maps and vector data. Then trend surface analysis and interpolation method were used to analyze the spatial distribution of these four kinds of climatic variables at three temporal scale: (1) monthly data; (2) mean monthly data of thirty years, and (3) mean annual data of thirty years. Ecological information system were used for graphics analysis on the spatial distribution of these climatic variables. | SHANG Zong-Bo GAO Qiong YANG Dian-An YANG Zheng-Yu | 2001 | Journal of Environmental Sciences2001，13，2： | 0 |
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