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| 1 | Near-surface sand-dust horizontal flux in Tazhong-the hinterland of the Taklimakan Desert显示文摘Tazhong is the hinterland and a sandstorm high-frequency area of the Taklimakan Desert. However, little is known about the detailed time-series of aeolian sand transport in this area. An experiment to study the sand-dust horizontal flux of near-surface was carried out in Tazhong from January to December 2009. By measuring the sand-dust horizontal flux throughout sixteen sand-dust weather processes with a 200-cm tall Big Spring Number Eight (BSNE) sampler tower, we quantitatively analyzed the vertical variation of the sand-dust horizontal flux. And the total sand-dust horizontal flux of different time-series that passed through a section of 100 cm in width and 200 cm in height was estimated combining the data of saltation movement continuously recorded by piezoelectric saltation sensors (Sensit). The results indicated that, in the surface layer ranging from 0-200 cm, the intensity of sand-dust horizontal flux decreased with the increase of the height, and the physical quantities obeyed power function well. The total sand-dust horizontal flux of the sixteen sand-dust weather processes that passed through a section of 100 cm in width and 200 cm in height was about 2,144.9 kg, the maximum of one sand-dust weather event was about 396.3 kg, and the annual total sand-dust horizontal flux was about 3,903.2 kg. The high levels of aeolian sand transport occurred during daytime, especially from 13:00 to 16:00 in the afternoon. We try to develop a new method for estimation of the detailed time-series of aeolian sand transport. | XingHua YANG Qing HE Mamtimin ALI Wen HUO XinChun LIU | 2013 | Journal of Arid Land2013，5，2： | 11 |
| 2 | Impact factors of soil wind erosion in the center of Taklimakan Desert显示文摘The development and progress of soil wind erosion are influenced by the factors of climate,terrain,soil and vegetation,etc. This paper,taking Tazhong region,a town in the centre of the Taklimakan Desert,as an example and using comparative and quantitative methods,discussed the effects of climate,surface roughness(including vegetation cover) and surface soil properties on soil wind erosion. The results showed that the climate factor index C of annual wind erosion is 28.3,while the maximum of C is 13.9 in summer and it is only 0.7 in winter. The value of C has a very good exponential relationship with the wind speed. In Tazhong region,the surface roughness height is relatively small with a mean of 6.32 × 10-5 m,which is in favor of soil wind erosion. The wind erosion is further enhanced by its sandy soil types,soil particle size,lacking of vegetation and low soil moisture content. The present situation of soil wind erosion is the result of concurrent effects of climate,vegetation and surface soil properties. | Qing HE XingHua YANG Ali Mamtimin ShiHao TANG | 2011 | Journal of Arid Land2011，3，1： | 8 |
| 3 | Diurnal dynamics of soil respiration and the influencing factors for three land-cover types in the hinterland of the Taklimakan Desert,China显示文摘Knowledge of soil respiration and the influencing factors in desert ecosystems is essential to understanding carbon dynamics and responses of biotic and abiotic processes in soils to climate change. In this study, soil respiration rate(R_s) for three land-cover types(shifting sandy land, sandy land with straw checkerboard barriers, and shelter forest land) in the hinterland of the Taklimakan Desert was measured in May 2015 using an automated soil CO_2 flux system. The effects of soil temperature(T_s) and soil water content(W_s) on R_s were also analyzed. The results showed that R_s values in shifting sandy land, sandy land with straw checkerboard barriers, and shelter forest land were all low and exhibited obvious diurnal fluctuations. The establishment of straw checkerboard barriers in sandy land had no significant effect on R_s, while the establishment of shelterbelts significantly increased R_s. Shifting sandy land and sandy land with straw checkerboard barriers were carbon sinks at night and early morning and were carbon sources in the daytime, while shelter forest land always acted as a carbon source during the whole day. The synergistic effect of T_s and W_s could better explain the diurnal dynamics in R_s than single factor. In shifting sandy land and sandy land with straw checkerboard barriers, W_s was identified as a limiting factor influencing the diurnal dynamics of R_s. Furthermore, a relatively strong hysteresis loop existed between R_s and T_s. In contrast, in shelter forest land, R_s was significantly influenced by T_s, and a relatively weaker hysteresis loop existed between R_s and W_s. | YANG Fan ALI Mamtimin ZHENG Xinqian HE Qing YANG Xinghua HUO Wen LIANG Fengchao WANG Shaoming | 2017 | Journal of Arid Land2017，9，4： | 7 |
| 4 | Sand flux estimation during a sand-dust storm at Tazhong area of Taklimakan Desert, China显示文摘In this paper, the sand transport during a sand-dust storm in the Tazhong area of the central Taklimakan Desert from 11:29 to 23:56 on July 19, 2008 was observed and measured in real time. The sand flux at Tazhong was estimated using sand transport empirical formulas. The critical friction velocity at Tazhong was 0.24 m/s and the functional relation between the wind speed and sediment discharge at the height of 2 m was established. It was also found that the calculated values by Lettau's sediment discharge formula were close to those of the instrument measurements. The horizontal sand flux and the vertical sand flux during this sand-dust storm at Tazhong were respectively 258.67×10-4 kg/(m·s) and 40.07×10-7 kg/(m2·s). | XingHua YANG XiaoLiang XU Qing HE Ali Mamtimin Bo YU ShiHao TANG | 2011 | Journal of Arid Land2011，3，3： | 6 |
| 5 | Analyses of temperature and humidity profiles and heat balance of the surface boundary-layer in the hinterland of the Taklimakan Desert显示文摘The daily variation regularities of micro-meteorological features, such as the surface layer temperature and humidity profiles of the inner desert in summer, the temperature of sand bed, the radiation of the earth's surface and the heat balance, were analyzed by combination method and logarithm regression according to the data obtained from the Atmospheric Environmental Observation Station of Taklimakan Desert in July―August of 2006 and 2007. It has been shown that temperature inversion occurred near the surface layer at night in summer, the temperature increased with the height within a certain altitude range, and the reverse was true during the daytime. The ground surface radiation balance of the Taklimakan Desert was mainly positive; other radiation components (the global radiation, the reflective radiation, the ground upward long wave radiation and the net radiation) exhibited daily variation char- acteristics evidently and showed normal diurnal cycle, except for the downward atmospheric long-wave radiation. The heat exchange of the surface layer of the desert was dominated by turbulence sensible heat, and only a small portion of heat was transferred to the atmospheric surface layer in the form of latent heat. The surface sensible heat and latent heat changed with the increase and decrease of sun elevation angle, with maximum of the latent heat appearing in wee hours and the peak value of the sensible heat appearing at noon. Observation and analysis showed that heating effect of the underlying surface of the desert was great on the aerosphere; the surface was a high heat source during the day and became a weak cold source at night. | WEI WenShou WANG MinZhong HE Qing LEI JiaQiang ALI Mamtimin | 2008 | Chinese Science Bulletin2008，53，S2： | 4 |
| 6 | Vertical distribution characteristics of dust aerosol mass concentration in the Taklimakan Desert hinterland显示文摘The different height mass concentrations of dust aerosol data from the atmosphere environment observation station(Tazhong Station)was continuously observed by instruments of Grimm 1.108,Thermo RP 1400a and TSP from January of2009 to February of 2010 in the Taklimakan Desert hinterland.Results show that:(1)The mass concentration value of 80m PM10was higher,but PM2.5and PM1.0concentrations at 80 m was obviously lower than 4 m PM10,and the value of 80 m PM1.0mass concentration was the lowest.(2)The PM mass concentrations gradually decreased from night to sunrise,with the lowest concentration at 08:00,with the mass concentration gradually increased,up to the highest concentration around18:00,and then decreased again.It was exactly the same with the changes of wind speed.(3)The high monthly average mass concentration of TSP mainly appeared from March to September,and the highest concentration was in April and May,subsequently gradually decreased.Also,March–September was a period with high value area of PM monthly average mass concentration,with the highest monthly average mass concentration of 846.0μg/m3for 4 m PM10appeared in May.The concentration of PM10was much higher than those of PM2.5and PM1.0at 80 m.There is a small difference between the concentration of PM2.5and PM1.0.Dust weather was the main factor which influenced the concentration content of the different diameter dust aerosol,and the more dust weather days,the higher content of coarse particle,conversely,fine particle was more.(4)The mass concentration of different diameter aerosols had the following sequence during dust weather:clear day | XinChun Liu YuTing Zhong Qing He XingHua Yang Ali Mamtimin Wen Huo | 2013 | Research in Cold and Arid Regions2013，5，6： | 3 |
| 7 | Analysis of mass concentration of atmospheric particulate matter in a sandstorm course and its affecting factors in the Taklimakan Desert显示文摘During the course of a major sandstorm from April 17 to April 23,2008 in the Taklimakan Desert,data pertaining to the mass concentrations of different-sized atmospheric particulate matter were observed continuously with Grimm 1.108,Thermo RP 1400a,TSP,and CAWS-600 instruments.The results showed that:(1) during the entire sandstorm process there were some differences between the daily mean particle concentration peaks and the hourly mean particle concentration peaks because the actual sandstorm lasted for only about 4 hr,whereas more particles were accumulated in the floating dust days before and after the actual sandstorm;(2) the intensity of the sandstorm was enhanced with the increase of wind speed,and this was related to the peak mass concentrations of atmospheric particulate matter;the wind speed directly affected the concentration of atmospheric particulate matter:the higher the wind speed,the higher the mass concentration(>0.23 μm was 39,496.5 μg/m 3,and >20.0 μm was 5,390.7 μg/m 3);(3) the concentration changes of PM 10 and TSP were also related to the course and intensity of the sandstorm;and(4) the mass concentration of atmospheric particulate matter had the following sequence during the dust weather:clear day < floating dust < floating and blowing dust < sandstorm.Temperature,relative humidity,and barometric pressure are important factors affecting the strength of storms,which could also indirectly affect the concentration change of atmospheric particulate matter. | XinChun Liu YuTing Zhong Qing He XingHua Yang Ali Mamtimin Wen Huo | 2012 | Research in Cold and Arid Regions2012，4，3： | 3 |
| 8 | Estimation of the Land Surface Emissivity in the Hinterland of Taklimakan Desert显示文摘An accurate accounting of land surface emissivity(ε) is important both for the retrieval of surface temperatures and the calculation of the longwave surface energy budgets.Since ε is one of the important parameterizations in land surface models(LSMs),accurate accounting also improves the accuracy of surface temperatures and sensible heat fluxes simulated by LSMs.In order to obtain an accurate emissivity,this paper focuses on estimating ε from data collected in the hinterland of Taklimakan Desert by two different methods.In the first method,ε was derived from the surface broadband emissivity in the 8–14 μm thermal infrared atmospheric window,which was determined from spectral radiances observed by field measurements using a portable Fourier transform infrared spectrometer,the mean ε being 0.9051.The second method compared the observed and calculated heat fluxes under nearneutral atmospheric stability and estimated ε indirectly by minimizing the root-mean-square difference between them.The result of the second method found a mean value of 0.9042,which is consistent with the result by the first method.Although the two methods recover ε from different field experiments and data,the difference of meanvalues is 0.0009.The first method is superior to the indirect method,and is also more convenient. | LIU Yong-qiang Ali MAMTIMIN HUO Wen YANG Xing-hua LIU Xin-chun MENG Xian-yong HE Qing | 2014 | Journal of Mountain Science2014，11，6： | 3 |
| 9 | Observation of saltation activity at Tazhong area in Taklimakan Desert,China显示文摘A two-year field observation of saltation activity was carried out at Tazhong area,the hinterland area of the Taklimakan Desert with highly frequent dust storms.From 1 September 2008 to 31 August 2010,a piezoelectric saltation sensor(Sensit) was used to continuously collect the data on saltation activity at a level sand surface.Analysis on the data suggests that saltation activity can occur at any time of the year when conditions are favorable;however,the necessary conditions are rarely satisfied in most time.In the daytime of spring or summer,saltation activity can persist even over a continuous one-hour-or-so period.It is found that,from 1 September 2008 to 31 August 2010,saltation activity accounts for more than 3% of the total yearly time,and it tends to peak in spring and summer months with strong winds.During winter months when winds are weak,however,it is often at a minimum.It seems that precipitation does not appear to be significant in reducing saltation activity in arid regions like Tazhong. | Ali MAMTIMIN | 2013 | Journal of Arid Land2013，5，1： | 3 |
| 10 | Analysis on the temporal-spatial distribution character and effect factors of PM10 in the hinterland of Taklimakan Desert and surrounding area显示文摘In recent years, the physical and chemical properties of dust aerosols from the dust source area in northern China have attracted increased attention. In this paper, Thermo RP 1400a was used for online continuous observation and study of the hinterland of Taklimakan, Tazhong, and surrounding areas of Kumul and Hotan from 2004 to 2006. In combination with weather analysis during a sandstorm in the Tazhong area, basic characteristics and influencing factors of dust aerosol PM10 have been summarized as below: (1) The occurrence days of floating dust and blowing dust appeared with an increasing trend in Kumul, Tazhong and Hotan, while the number of dust storm days did not significantly change. The frequency and intensity of dust weather were major factors affecting the concentration of dust aerosol PM10 in the desert. (2) The mass concentration of PM10 had significant regional distribution characteristics, and the mass concentration at the eastern edge of Taklimakan, Kumul, was the lowest; second was the southern edge of the desert, Hotan; and the highest was in the hinterland of the desert, Tazhong. (3) High values of PM10 mass concentration in Kumul was from March to September each year; high values of PM10 mass concentration in Tazhong and Hotan were distributed from March to August and the average concentration changed from 500 to 1,000 μg/m3, respectively. (4) The average seasonal concentration changes of PM10 in Kumul, Tazhong and Hotan were: spring > summer > autumn > winter; the highest average concentration of PM10 in Tazhong, was about 1,000 μg/m3 in spring and between 400 and 900 μg/m3 in summer, and the average concentration was lower in autumn and winter, basically between 200 and 400 μg/m3. (5) PM10 concentration during the sandstorm season was just over two times the concentration of the non-sandstorm season in Kumul, Tazhong and Hotan. The average concentrations of sandstorm season in Tazhong were 6.2 and 3.6 times the average concentrations of non-sandstorm season in 2004 and 2008, respectively. (6) The mass concentration of PM10 had the following sequence during the dust weather: clear day < floating dust < floating and blowing dust < sandstorm. The wind speed directly affects the concentration of PM10 in the atmosphere, the higher the wind speed, the higher the mass concentration. Temperature, relative humidity and barometric pressure are important factors affecting the strength of storms, which could also indirectly affect the concentration change of PM10 in the atmosphere. | Ali Mamtimin | 2011 | Research in Cold and Arid Regions2011，3，6： | 1 |
| 11 | Metabonomic signature analysis of cervical carcinoma and precancerous lesions in women by 1H NMR spectroscopy显示文摘 | Hasim A Ali M Mamtimin B | | 0，，06： | 1 |
| 12 | Size distribution of PM_(20) observed to the north of the Tibetan Plateau显示文摘The size distribution of airborne dust particles is an important parameter in the measurement of dust emissions due to wind erosion,and a quantitative and accurate description is necessary.Observations regarding the size distribution of airborne dust particles are currently lacking in Tibetan Plateau(TP).This study aims to obtain a dust particle size distribution and compare the difference in spatial distribution at a field site(FS)and two urban observation sites(Minfeng and Hetian),in the north of the TP,under the condition of the dust-days and clear-days.The observation data was collected from 5 July to 4 August,2019.The mass concentration of dust(PM20)was measured with a 10-stage quartz crystal microbalance cascade impactor.The results suggested that 91.9%of the particles were less than 1.4μm on clear-days,and particles of d≥1.4μm increased to 27.2%with the occurrence of the dust events.More than 80%of the airborne dust particles were less than 1.4μm for each friction velocity.The proportion of d<0.7μm was the greatest at 3.0 m(above the surface,similarly hereinafter)on dust-days,while the proportion of d>0.7μm was the greatest at 0.5 m on clear-days.During urban observation,with the occurrence of dust events,the concentration of a particle size greater than 2.5μm increased most significantly in Minfeng,while the concentration of a particle size less than 0.7μm increased most significantly in Hetian.Moreover,the proportion of particles with d<0.7μm had the smallest difference,while the proportion of particles with d>1.4μm had the most obvious difference among these three sites. | ZHOU Cheng-long YANG Fan HUO Wen MAMTIMIN Ali YANG Xing-hua | 2021 | Journal of Mountain Science2021，18，2： | 1 |
| 13 | Metabonomic signature analysis of cervical carcinoma and precancerous lesions in women by 1H NMR spectroscopy显示文摘 | Hasim A Ali M Mamtimin B | 2012 | Experimental and Therapeutic Medicine2012，3，6： | 1 |
| 14 | Analysis of atmospheric boundary ozone profiles in winter in hinterland of Taklimakan Desert显示文摘In order to reveal the variation characteristics of ozone(O3)concentration in the atmosphere boundary layer over a desert in winter,an observation experiment was carried out in the Tazhong area by means of a tethered balloon during January 18-25,2008.The vertical distribution of O3 concentration and its correlation with temperature and humidity were analyzed based on experimental observation data and related data.Results show that:(1)The concentration of O3 mainly ranges from 10 to 50 μg/L,with a maximum of 56.1 μg/L,minimum of 2.6 μg/L,and a daily average concentration of 34.4 μg/L.(2)O3 profiles can be divided into three types:peak,uniform,and growth,where uniform accounts for the majority.(3)Temperature and mois-ture are influential on O3 concentrations in atmospheric boundary layer.Temperature inversion and water vapor increase in an atmospheric boundary layer leads to a decrease of O3.(4)O3 concentration has an obvious daily change in Tazhong.It is lower at night,begins to increase after sunrise,and reaches a maximum at noon.The maximum appears at 17:00 BJT(Beijing Time),and the minimum appears at 08:00 BJT. | Qing He XingHua Yang Ali Mamtimin Wen Huo Qiang Liu | 2011 | Research in Cold and Arid Regions2011，3，4： | 0 |
| 15 | The variation characteristics and effect factors of surface ozone concentration in the Taklimakan Desert hinterland显示文摘Based on automatic continuous surface ozone concentration observation data from June 10,2010 to March 20,2012 in the Taklimakan Desert hinterland,combined with corresponding meteorological data,the temporal,seasonal and daily variation characteristics of surface ozone concentrations under different weather conditions were analyzed.At the same time,the main factors affecting ozone variation are discussed.Results show that:(1)Daily variation of ozone concentration was characterized by one obvious peak,with gentle changes during the night and dramatic changes during the day.The lowest concentration was at09:00 and the highest was at 18:00.Compared to urban areas,there was a slight time delay.(2)Ozone concentration variation had a weekend effect phenomenon.Weekly variation of ozone concentration decreased from Monday to Wednesday with the lowest in Wednesday,and increased after Thursday with the highest in Sunday.(3)The highest monthly average concentration was 89.6μg/m3in June 2010,and the lowest was 32.0μg/m3in January 2012.Ozone concentration reduced month by month from June to December in 2010.(4)Ozone concentration in spring and summer was higher than in autumn and winter.The variation trend agreed with those in other large and medium-sized cities.(5)Under four different types of weather,daily ozone concentration varied most dramatically in sunny days,followed by slight variation in rain days,and varied gently in cloudy days.Ozone concentration varied inconspicuously before a sandstorm appearance,and dropped rapidly at the onset of a sandstorm.(6)Daily variation of radiation was also characterized by a single peak,and the variation was significantly earlier than ozone concentration variation.Sun radiation intensity had a direct influence on the photochemical reaction speed,leading to variation of ozone concentration.(7)Daily average ozone concentration in dust weather was higher than in slight rain and clear days.The variation of near surface ozone concentration could also be affected by meteorological factors such as relative humidity,wind speed,wind direction and sunshine hours.Thus,numerous factors working together led to ozone pollution. | XinChun Liu YuTing Zhong Qing He YanMei Peng XingHua Yang Ali Mamtimin Wen Huo | 2014 | Research in Cold and Arid Regions2014，6，1： | 0 |
| 16 | Validation of AIRS-Retrieved atmospheric temperature data over the Taklimakan Desert显示文摘The Taklimakan Desert, the world's second largest desert, plays an important role in regional climate change. Previousstudies on its spatial temperature features suffered from sparse conventional detection data, but the Atmospheric InfraredSounder (AIRS) provides excellent temperature retrievals with high spatiotemporal resolution. Validation of AIRS temperatureretrievals over desert regions with high land-surface emissivity, the key contributor to inversion error, is essential beforeusing these data in regional weather/climate modeling. This paper examines the correlation coefficients, root meansquare error (RMSE) and mean BIAS between AIRS-retrieved atmospheric temperature data and radiosonde observations(RAOBs) in the Taklimakan Desert hinterland and oases in the morning and at dusk. Firstly, the AIRS retrievals are consistentwith RAOBs and are more consistent in the morning than at dusk. The consistency is better over a small-scale desert oasisthan over a large-scale oasis in the morning and exhibits the opposite trend at dusk. The correlation coefficient over thehinterland is high in the morning but negative at dusk due to high desert-surface emissivity. Second, the RMSEs, which areall smaller than 3 K, are generally higher over desert sites than over oasis sites and slightly lower over a small-scale oasisthan over a large-scale oasis in the morning. At dusk, the RMSEs are higher over desert sites than over oases and slightlyhigher over a small-scale oasis than over a large-scale oasis. Furthermore, the RMSEs are generally higher in the morningthan at dusk over a large-scale oasis and lower in the morning than at dusk over a small-scale oasis. Third, the absolutemean BIAS values are mostly lower than 1 K. In the morning, relative to RAOB temperatures, the retrieval temperaturesare higher over desert sites but lower over oasis sites. At dusk, the retrieval temperatures are lower than RAOB temperaturesover both desert and oasis sites. The retrieval temperatures are higher than RAOB temperatures over desert sites inthe morning but slightly lower at dusk. Most absolute mean BIAS values are higher in the morning than at dusk overboth oasis and desert sites. Finally, the consistency between the AIRS and RAOB temperature data is high from 700 hPato 100 hPa in the morning and from 700 hPa to 300 hPa at dusk. The difference between the AIRS and RAOB temperaturedata is generally higher in the morning than that at dusk. The RMSE differences between the AIRS and RAOB data areslightly lower in the morning than at dusk and are lower in the middle layers between 700 hPa and 150 hPa than in the layersabove 150 hPa during both the morning and night. The BIAS is lower in the morning than at dusk below 300 hPabut higher in the upper layers. Moreover, the BIAS value is positive in the middle layers between 500 hPa and 150 hPaand negative at other levels at both times. Generally, the AIRS retrieval temperatures are reliable and can be used in furtherstudies in the Taklimakan Desert. | YuFen Ma RuQi Li Men Zhang MinZhong Wang Mamtimin Ali | 2020 | Research in Cold and Arid Regions2020，12，4： | 0 |
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