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| 1 | Reconstruction of precipita- tion in the last 140 years fromtree ring at south margin of the Tengger Desert, China显示文摘Based on the tree ring width index of Pinus tabulaeformis, precipitation in the last 140 years was recon-structed at south margin of the Tengger Desert. The results indicated that there were obvious fluctuations of dry-wet changes in precipitation: two wet periods occurred during 1868―1876 and 1932―1939, and two dry periods during 1877―1894 and 1924―1932, however, the years 1887 and 1888 were a little wet. There were small changes in precipita-tion during 1895―1923 and 1940―2000. As compared to the average, the maximum increasing range of precipitation amounted to 56% during the wet periods, and 42% during the dry periods. And the range of variability of precipitation exceeded 30% in 19 years. There was no obvious consistent drying or wetting trend in the last 140 years. But since 1940 fluctuating scope of precipitation tended to be smaller, while the frequency of the fluctuation tended to be larger. Power spectrum analyses suggested that precipitation of south mar-gin of the Tengger Desert had significant periodicities of 2.46―2.64 a and quasi periodicity of 11.67 a. | HASI Eerdun | 2005 | Chinese Science Bulletin2005，50，21： | 17 |
| 2 | Physicochemical characteristics of ambient particles settling upon leaf surfaces of urban plants in Beijing显示文摘Particulate pollution is a serious health problem throughout the world, exacerbating a wide range of respiratory and vascular illnesses in urban areas. Urban plants play an important role in reducing particulate pollution. Physicochemical characteristics of ambient particles settling upon leaf surfaces of eleven roadside plants at four sites of Beijing were studies. Results showed that density of particles on the leaf surfaces greatly varied with plant species and traffic condition. Fraxinus chinensis, Sophora japonica, Ailanthus altissima, Syringa oblata and Prunus persica had larger densities of particles among the tall species. Due to resuspension of road dust, the densities of particles of Euonymus japonicus and Parthenocissus quinquefolia with low sampling height were 2—35 times to other taller tree species. For test plant species, micro-roughness of leaf surfaces and density of particles showed a close correlation. In general, the larger micro-roughness of leaf surfaces is, the larger density of particles is. Particles settling upon leaf surfaces were dominantly PM10 (particulate matter less than 10 ?滋m in aerodynamic diameter; 98.4%) and PM2.5 (particulate matter less than 2.5 ?滋m in aerodynamic diameter; 64.2%) which were closely relative to human health. Constant elements of particles were C, O, K, Ca, Si, Al, Mg, Na, Fe, S, Cl and minerals with higher content were SiO2, CaCO3, CaMg(CO3)2, NaCl and 2CaSO4·H2O, SiO2. CaCO3 and CaMg(CO3)2 mainly came from resuspension of road dust. 2CaSO4·H2O was produced by the reaction between CaCO3 derived from earth dust or industrial emission and SO2, H2SO4 or sulfate. NaCl was derived from sea salt. | WANG Lei LIU Lian-you GAO Shang-yu HASI Eerdun WANG Zhi | 2006 | Journal of Environmental Sciences2006，18，5： | 16 |
| 3 | Nebkha (coppice dune) formation and significance to environmental change reconstructions in arid and semiarid areas显示文摘在干旱、半干旱的区域的环境对气候变化极其敏感。在这些区域的高风活动导致了广泛地发达的干旱地形学,但是因为相对高分辨率的代理的缺席,过去环境的变化糟糕被理解。nebkhas 的累积特征,在这些区域广泛地发展了,能被用作重建的一个方法环境变化。这里,我们在干旱、半干旱的区域在关于 nebkhas 和他们的意义的形成,发展,和沉积特征的研究总结了最近的进展到环境变化。基于我们的同事的研究,我们建议关于 nebkha 形成的研究能在干旱、半干旱的区域关于环境变化提供不同线索;然而,继续研究被需要。 | LANG Lili WANG Xunming HASI Eerdun HUA Ting | 2013 | Journal of Geographical Sciences2013，23，2： | 12 |
| 4 | Characteristics of surface runoff in a sandy area in southern Mu Us sandy land显示文摘To better understand the key role of biological soil crusts(BSCs) in redistribution processes of limited water resources in semi-arid sandy ecosystems,surface runoff over BSCs in a sandy area in the southern Mu Us sandy area was observed in this study.The results indicated that runoff occurred twice among six rainfall events during the experimental period.Runoff yields varied among types of BSCs,and that they increased in the following order:light algae crusts,dark algae crusts and moss crusts.These findings showed that runoff yields were increasing with the development of BSCs.The percentage of runoff in individual rainfall events increased from light algae crusts to moss crusts,which indicated that the redistribution ratios of different types of BSCs differed.Surface runoff of BSCs may be influenced by rainfall,rain intensity,degree of water saturation of the BSCs before the rain and degree of development of BSCs.Formation of BSCs on the surface of sand dunes changed the spatial distribution pattern of water in this semi-arid sandy ecosystem,which increased the heterogeneity of resources such as water and nutrients.Therefore,making appropriate disturbances of BSCs during storm season is beneficial to maintaining the balance of natural resources in the semi-arid sandy ecosystem. | WU YongSheng HASI Eerdun Wugetemole WU Xia | 2012 | Chinese Science Bulletin2012，57，2： | 8 |
| 5 | Landscape pattern change and driving force of blowout distribution in the Hulun Buir Sandy Grassland显示文摘The land coverage pattern changes for the past 50 years in a typical region of the Hulun Buir Sandy Grassland were interpreted and analyzed based on a series of remote sensing images in 1959, 2002, 2004 and 2009. The temporal and spatial changes of landscape patterns were revealed and the driving forces were analyzed. The results show that all land coverage types had large variable amplitudes. The grassland area decreased, whereas other areas increased. Owing to implementation of artificial sand fixation from 2004 to 2009, the areas of flowing blowouts and depositional area decreased by 71,369 and 128,835 m2 , respectively. The average patch area reduced, but the number of blowouts increased, fractal dimension increased, and blowout structure became complex. The fragmentation index increased, whereas contagion index decreased. Driving force analysis shows that human factors such as overgrazing are slightly larger than natural factors of increased temperature and decreased precipitation. | Eerdun Hasi | 2012 | Research in Cold and Arid Regions2012，4，5： | 6 |
| 6 | Characteristics of stemflow for sand-fixed shrubs in Mu Us sandy land, Northwest China显示文摘Little work has been done on stemflow for desert shrubs in China. This study measured stemflow in two shrubs of Salix psammophila C. Wang et Chang Y. Yang and Artemisia sphaerocephala Krasch in Mu Us sandy land and established a relationship between stemflow and canopy characteristics, rainfall amount and intensity. During the experimental period, the amount of stemflow for S. psammophila and A. sphaerocephala accounted for 7.6% and 2.7% of the gross rainfall respectively. Statistical analysis showed that there was a significant positive linear correlation between rainfall and stemflow for the two shrubs; while the relationship between stemflow percentage and rainfall suggested that there existed a rainfall depth threshold of 3―5 mm for S. psammophila and 5―7 mm for A. sphaerocephala. Stemflow percentage positively increased with rainfall depth increasing before the rainfall depth threshold values had been reached but showed stability after the threshold. A stepwise regression analysis suggested that the shrubs with more branches, larger crown volume and smaller branch angle inclination tended to collect more volumes of stemflow. Moreover, stemflow amount and percentage increased with the maximum rain intensity increasing in 10 minutes (I10) and the stemflow percentage tended to increase quickly with I10 when it was less than 3.0 mm h-1 for S. psammophila and 2.0 mm h-1 for A. sphaero- cephala, and then showed stable trend with increasing of I10. | YANG ZhiPeng LI XiaoYan LIU LianYou WU JianJun HASI Eerdun SUN YongLiang | 2008 | Chinese Science Bulletin2008，53，14： | 6 |
| 7 | Desertification in China: An assessment显示文摘 | Xunming Wang Fahu Chen Eerdun Hasi Jinchang Li | 2008 | Earth Science Reviews2008，，3： | 2 |
| 8 | Effects of vege- tation restoration in different types on soil nutrients in Southern Edge of Mu Us Sandy Land 显示文摘 | Yang Yue Eerdun Hasi Sun Baoping | 2012 | Soil and Fer- tilizer2012，13，8： | 1 |
| 9 | Climate, Desertification, and the Rise and Collapse of China’s Historical Dynasties显示文摘 | Xunming Wang Fahu Chen Jiawu Zhang Yi Yang Jijun Li Eerdun Hasi Caixia Zhang Dunsheng Xia | 2010 | Human Ecology2010，，1： | 1 |
| 10 | Desertification in China: An assessment显示文摘 | Xunming Wang Fahu Chen Eerdun Hasi Jinchang Li | 2008 | Earth Science Reviews2008，，3： | 1 |
| 11 | The Role of P-glycopro- tein in transport of danshensu across the blood-brain barrier 显示文摘 | Yu PF Wang WY Eerdun G | 2011 | Evid Based Complement Alternat Med2011，2011，71： | 1 |
| 12 | Desertifieation in China: An assessment 显示文摘 | Wang X M Chen F H Eerdun H | 2008 | Earth - Science Reviews2008，88，34： | 1 |
| 13 | Desertification in China: An assessment显示文摘 | Wang Xunming Chen Fahu Hasi Eerdun | 2008 | Earth-Science Reviews2008，88，34： | 1 |
| 14 | Im-pacts of Land Use Change on Ecosystem Service Val-ue in Yanchi County of Ningxia 显示文摘 | Yue YANG Baoping SUN Eerdun HASI? | 2013 | AgriculturalScience^-Technology2013，14，： | 1 |
| 15 | Nonclassical Symmetry of the Wave Equation with Source Term显示文摘 | Temuer C L Eerdun B H Xia T C | 2012 | Chinese Annals of Mathematics (Series A )2012，33，2： | 1 |
| 16 | Significance of variations in the wind energy environment over the past 50years with respect to dune activity and desertification in arid and semiarid northern Chi- na 显示文摘 | Wang X M Eerdun H Zhou Z J | 2007 | Geomorphology2007，86，： | 1 |
| 17 | Deserti- fication in China: An assessment 显示文摘 | Wang Xunming Chen Fahu Eerdun Hasi | 2008 | Earth-Science Re- views2008，88，： | 1 |
| 18 | Sandy Land-lake-vegetation Landscape of Songnen Sandy Land of China:Pattern,Process and Mechanism显示文摘In order to investigate the dynamic evolution of the sandy land-lake-vegetation landscape in Songnen Sandy Land(SSL)and its response to climate change and human activities,the distribution pattern,evolution,and driving mechanisms of the landscape were analyzed based on Landsat satellite images and meteorological and socio-economic data during 1980–2020.The results indicate that the area of sandy land exhibited an upward fluctuation during the last 40 yr,with a net increase of 251.75 km^(2) at an increment rate of 3.80%/10 yr.The lake area also exhibited an upward fluctuation,with a net increase of 1200.95 km^(2) at an increment rate of 20.42%/10 yr.Vegetation coverage decreased by 2633.30 km^(2),with areas of low vegetation coverage exhibiting a trend of initial decline and subsequent increase,areas of medium vegetation coverage showed an upward fluctuation,and areas of high vegetation coverage showed a trend of initial increase and subsequent decrease,with overall changes of–0.67%/yr,1.12%/yr,and 0.17%/yr,respectively.The relationships between sandy land,lakes,and vegetation coverage were significant,with areas of sandy land and low vegetation coverage showing the strongest correlation.The dynamic evolution of landscape is controlled by regional climatic and socio-economic factors,with socio-economic factors as the first principal component contributing up to 59.64%. | DU Huishi HASI Eerdun | 2022 | Chinese Geographical Science2022，32，4： | 0 |
| 19 | PROGRESS IN QUATERNARY AEOLIAN ENVIRONMENT RESEARCH显示文摘Quaternary aeolian environment researches were mainly conducted by analyzing the information carriers, extracting valuable evidences about aeolian environment changes, so to presume and reconstruct paleoenvironments. This paper formulated progress in Quaternary aeolian environment research using dune-morphological records, sedimentological records and bio-fossils records, as well as advances about chronology; presented that people should pay more attention to further synthetic study of multi-types of records including dune morphology, size, formation time, sediment supply, and their relations with wind regime in future, especially the research on dating method. | HASI Eerdun | 2005 | Chinese Geographical Science2005，15，1： | 0 |
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