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| 1 | Relationship between thermal anomalies in Tibetan Plateau and summer dust storm frequency over Tarim Basin,China显示文摘The dust storm is the most important and frequent meteorological disaster over Tarim Basin,which causes huge damages on local social economics.How to predict the springtime and summertime dust storm occurrence has become a hot issue for meteorologists.This paper employed the data of dust storm frequency and 10-m wind velocity at 35 stations over Tarim Basin and the reanalysis data from the National Center for Environmental Prediction and the National Center for Atmospheric Research(NCEP/NCAR) during 1961-2007 to study the relationship between dust storm frequency(DSF) in summer over Tarim Basin and the thermal anomalies in Tibetan Plateau in May by using the statistical methods,such as Empirical Orthogonal Function(EOF),correlation and binomial moving average.The results show when negative anomalies in Tibetan Plateau and positive anomalies in its southern region are present along 30°N(the second mode of surface temperature anomalies by EOF decomposition) in May,the time coefficient(PC2) plays an important role in summer DSF variation and has a close relation with the summer DSF at both inter-annual and decadal time scales.When negative anomalies in Tibetan Plateau and positive anomalies are present in its southern region(PC2 in positive phase),there is an anomalous anticyclone in North China,which weakens the northwest wind and is not beneficial for cold air moving from high latitude to the Tarim Basin,and the circulation pattern is hard to result in dust storm weather.Furthermore,the sea level pressure(SLP) increased over Tarim Basin and the direction of SLP gradient reversed,which resulted in the 10-m wind velocity slowing down,so the DSF decreased.From above all,it can be conclude that the thermal anomalies in Tibetan Plateau in May has important effects on the summertime dust storm frequency over Tarim Basin and the PC2 can be used as a prediction factor for the summertime dust storm occurrence. | Yong ZHAO HongJun LI AnNing HUANG Qing HE Wen HUO MinZhong WANG | 2013 | Journal of Arid Land2013，5，1： | 4 |
| 2 | Trends and abrupt changes in surface vapor content over Tarim Basin during the last 50 years显示文摘The surface vapor content has a close correlation with the generation of precipitation. Based on the atmospheric circulation data and surface vapor content data from 37 weather stations across the Tarim Basin during 1961 2010, the paper analyzed the vapor variation trend, period, abrupt changes and their causes. The results show that the increase trend of surface vapor content over the Tarim Basin mostly conforms with the average trend coefficient of 0.48. There were 3 centers displaying a trend of high vapor increase and 3 centers displaying a low vapor increase. These centers were distributed in strips and blocks across the basin from northeast to southwest. Notable inter-decadal variations in annual and seasonal vapor contents occurred in the Tarim Basin during the 50 years of the study period, with more vapor after the mid-1980s and less vapor in the 1960s and the 1970s. The significant increase in vapor content in the 50 year period occurred mostly in the 1980s and the 1990s. The increasing trend across the four seasons was strongest in summer, reaching 0.43, and weakest in spring. Great variations existed between the spring trend and the annual, summer, autumn and winter trends. During the 50-year study period, there are distinguishable periods of 4-6 years and 8-10 years in which the annual and seasonal vapor contents varied alternately between low and high concentrations. The annual vapor content and that of the four individual seasons all changed abruptly in about the mid-1980s (α<0.05). The west wind circulation, Tibetan Plateau circulation and the annual mean temperatures of the Tarim Basin are the main factors that influenced the surface vapor content over the study area, of which the Tibetan Plateau circulation may be the most important one. | HongJun LI WeiYi MAO Yong ZHAO MinZhong WANG Wen HUO | 2012 | Journal of Arid Land2012，4，3： | 3 |
| 3 | The atmospheric circulation patterns influencing the frequency of spring sand-dust storms in the Tarim Basin显示文摘Using NCEP/NCAR reanalysis data and the sand-storm frequency data from 37 weather stations in the Tarim Basin for the period1961–2009,the relationship between the frequency of spring sandstorms in the Tarim Basin and the associated atmospheric circulation patterns is analyzed in this study.We found significantly negative correlations between sandstorm frequency and the 500-hPa geopotential height over the Paris Basin and midwestern Mongolia,while there were positive correlations over the Ural River region.The rising of the 500-hPa geopotential height in midwestern Mongolia and its falling over the Ural region correspond to a weakening of the large-scale wave patterns in the Eurasian region,which directly causes the frequency of the sand-dust storms in the Tarim Basin to decline.Also,the abrupt decline in the spring sandstorm frequency in the Tarim Basin observed in the last half-century is associated with profound changes in the atmospheric circulation in these key regions.At the interannual scale,the strengthened cyclonic atmospheric circulation patterns in the western part of Mongolia and the anticyclonic patterns over the East European plains at 500-hPa geopotential height,are responsible for frequent sandstorm occurrences in the Tarim Basin. | HongJun Li XinHua Yang Yong Zhao MinZhong Wang Wen Huo | 2014 | Research in Cold and Arid Regions2014，6，2： | 2 |
| 4 | SDF- 1/CX- CR4 signaling upregnl-Ates survivin to regulate human sacral cell cycle and transition via ERK and PI3K/AKT pathway 显示文摘 | Peng Yang Gang Wang Hongjun Huo | 2015 | Medical Oncology2015，321，96： | 1 |
| 5 | Quantitative research on higher order harmonics in metrology beamline显示文摘The synchrotron radiation spectra of the spherical grating monochromator(SGM)working in the soft X-ray and VUV region are often contaminated by significant amounts of higher order harmonics.They cannot be suppressed completely by suitable filters.Higher order contributions in the spectral radiation standard and metrology beamline were researched using transmission grating(made in-house)and IRD AXUV100G(USA)photodiode detector.The exit beam was dispersed with the transmission grating behind the exit slit of the monochromator,and the contributions of the different orders were analyzed.The higher order distributions were quantitatively determined for three gratings with line densities of 1800,600 and 200 l/mm.Experiment results show that in wavelengths between 5 nm and 15 nm the contributions of the higher orders to the detector signal are restricted to less than 7%even without the use of filters.In wavelength regions between 5 nm and 34 nm,the contributions of the higher orders to the detector signal are less than 14%with proper Al,Si_(3)N_(4) and Zr filters,and after being modified by quantum efficiency of the detector,the higher order contributions are restricted to less than 6.5%.The study also shows that higher orders are almost totally suppressed by MgF_(2) filter when the wavelength ranges between 115–140 nm. | Hongjun ZHOU Jinjin ZHENG Tonglin HUO Guobin ZHANG Zeming QI Pengfei ZHONG | 2008 | Frontiers of Electrical and Electronic Engineering in China2008，3，1： | 0 |
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