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| 1 | Recent glacial retreat in High Asia in China and its impact on water resource in Northwest China显示文摘Under the impact of climatic warming, the glaciers in the High Asia in China have been retreating continuously with negative glacial mass balance in recent several decades. The retreat became more intensive in the past 10 years. The spatial pattern of the glacial retreat in the High Asia in China is that the smallest magnitude of retreat is in the inland of the Tibetan Plateau, the magnitude increases from the inland to the margin of the Tibetan Plateau, and the largest magnitude at the margin of the Tibetan Plateau. The glacial retreat in the High Asia in China has an important impact on the water resource of the arid regions in Northwest China. This study shows that the glacial retreat in the 1990s has caused an increase of 5.5% in river runoff in Northwest China. In the Tarim River basin, the increase of river runoff is higher than 5.5%. | YAO Tandong 1,2 ,WANG Youqing 2 ,LIU Shiying 2,1 ,PU Jianchen 2,1 ,SHEN Yongping 2 & LU Anxin 2,1 1.Institute of Tibetan Plateau Research,Chinese Academy of Sciences,Beijing 100029,China 2.Cold and Arid Regions Environmental and Engineering Research Institute,Chinese Academy of Sciences,Lanzhou 730000,China | 2004 | Science China Earth Sciences2004，47，12： | 117 |
| 2 | Variations in equilibrium line altitude of the Qiyi Glacier,Qilian Mountains,over the past 50 years显示文摘Based on observations of the equilibrium line altitude(ELA)of the Qiyi Glacier in the Qilian Mountain,we established a statistical model between ELA and its major influencing factors,warm season air temperature(air temperature averages for September,July and August)and cold season precipitation(total precipitation in the period January through March).Warm season air temperature was the leading climatic factor influencing ELA variations.The glacier ELA ascends(descends)172 m when warm season air temperature increases(decreases)by 1°C,and ascends(descends)62 m when cold season precipitation decreases(increases)by 10%.In the period 1958-2008,the glacier ELA showed a general increasing trend,ascending 230 m and reaching its highest altitude in 2006 at 5131 m a.s.l.,close to the glacier summit.If future climate is similar to that in the period 2001-2008,the Qiyi Glacier will not stabilize until it retreats by 2.08 km. | WANG NingLian HE JianQiao PU JianChen JIANG Xi JING ZheFan | 2010 | Chinese Science Bulletin2010，55，33： | 22 |
| 3 | Water isotope variations in the snow pack and summer precipitation at July 1 Glacier, Qilian Mountains in northwest China显示文摘This paper presents the stable isotope data of the snow pack and summer precipitation collected at the July 1 Glacier, Qilian Mountains in northwest China and analyses their relationships with meteorologi- cal factors. On an event scale, there is no temperature effect on the δ 18O values in the summer pre- cipitation, whereas the amount effect is shown to be clear. By tracing the moisture transport history and comparing the precipitation with its isotopic composition, it is shown that this amount effect not only reflects the change in moisture trajectory, which is related to the monsoon activities, but is also associated with the cooling degree of vapor in the cloud, the evaporation of falling raindrops and the isotopic exchange between the falling drops and the atmospheric vapor. As very little precipitation occurs in winter, the snow pack profile mainly represents the precipitation in the other three seasons. There are low precipitation δ 18O ratios in summer and high ratios in spring and autumn. The Meteoric Water Line (MLW) for the summer precipitation is δ D = 7.6 δ 18O + 13.3, which is similar to that at Delingha, located in the south rim of the Qilian Mountains. The MWL for the snow pack is δ D = 10.4 δ 18O + 41.4, showing a large slope and intercept. The deuterium excess (d) of the snow pack is positively correlated with δ 18O, indicating that both d and δ 18O decrease from spring to summer and increase from early autumn to early spring. This then results in the high slope and intercept of the MWL. Sea- sonal fluctuations of d in the snow pack indicate the change of moisture source and trajectory. During spring and autumn, the moisture originates from continental recycling or rapid evaporation over rela- tively warm water bodies like Black, Caspian and Aral Seas when the dry westerly air masses pass over them, hence very high d values in precipitation are formed. During summer, the monsoon is responsi- ble for the low d values. This indicates that the monsoon can reach the western part of the Qilian Mountains. | ZHOU ShiQiao NAKAWO Masayoshi SAKAI Akiko MATSUDA Yoshihiro DUAN KeQin PU JianChen | 2007 | Chinese Science Bulletin2007，52，21： | 21 |
| 4 | Variations in air temperature during the last 100 years revealed by δ^(18)O in the Malan ice core from the Tibetan Plateau显示文摘By comprehensive analyses, it was found that the variations in d 18O recorded in Malan ice core from theKekexili Region on the Tibetan Plateau could represent thechanges in air temperature during the summer half year (from May to October) over the Kekexili Region and the northern margin of the Tibetan Plateau. The general increase trend in d18O in this ice core during the past century indicated climate warming, and it was estimated that air temperature during the summer half-year rose about 1.2C over there then. However, this ice core record documented that the study area has been cooling while most of the world has been dramatically warming since the late 1970s. A teleconnection was foundbetween the variations in d 18O in the Malan ice core and the North Atlantic Oscillation. Moreover, the variations in d 18O in this ice core were similar to that in the summer half-year air temperature over the southern Tibetan Plateau on thecenturial time scale, but opposite on the multidecadal timescale. | WANG Ninglian, YAO Tandong, PU Jianchen, ZHANG Yongliang, SUN Weizhen & WANG Youqing Key Laboratory of Ice Core and Cold Regions Environment, Cold and Arid Regions Environmental and Engineering Research Institute, ChineseAcademy of Sciences, Lanzhou 730000, China | 2003 | Chinese Science Bulletin2003，48，19： | 19 |
| 5 | Temperature and methane records over the last 2 ka in Dasuopu ice core显示文摘 | PU Jianchen ( | 2002 | Science China Earth Sciences2002，45，12： | 17 |
| 6 | Recent area and ice volume change of Kangwure Glacier in the middle of Himalayas显示文摘This paper calculated and evaluated the area and ice volume changes of Kangwure Glacier in Mt.Xixiabangma,middle of Himalayas in the past 3 decades,based on the field survey of glacier boundary position by differential GPS and glacier depth by Ground Penetrating Radar(GPR),together with the topographic map and remote sense data.The studied data showed that the Kangwure Glacier has experienced significant mass deficit since the 1970s,with 34.2%of area loss,48.2%ofice volume loss and 7.5 m of average thickness decrease.This result revealed that the ice volume loss of Himalayan glaciers was more serious than expected.Analysis of meteorological data from two weather stations in the region of Mt.Xixiabangma,shows that the air temperature of this region has risen from the middle of the 20th century to the beginning of the 21st century.Significant retreat of Himalayas glacier driven by climatic warming will have a remarkable impact on hydrology and ecosystem. | MA LingLong TIAN LiDe PU JianChen WANG PengLing | 2010 | Chinese Science Bulletin2010，55，20： | 17 |
| 7 | Tracing the major source area of the mountainous runoff generation of the Heihe River in northwest China using stable isotope technique显示文摘Based on the data of δ18O in precipitation during the period of April 2006 through May 2007 in the upper catchment of the main stream of the Heihe River in the Qilian Mountains, we found that there existed an evident altitude effect on δ18O in precipitation, and the δ18O-altitude gradient was _0.18‰/100 m. When δ18O in river water at the outlet of the mountainous drainage area of the main stream of the Heihe River was combined with the δ18O-altitude relation, it was realized that the mountainous runoff was generated mostly at high altitudes. Using two component models, we revealed that 80.2% of the annual total mountainous runoff amount was generated at the alpine permafrost-snow-ice zone with an altitude of above 3600 m a.s.l. | WANG NingLian ZHANG ShiBiao HE JianQiao PU JianChen WU XiaoBo JIANG Xi | 2009 | Chinese Science Bulletin2009，54，16： | 16 |
| 8 | Low-threshold topological nanolasers based on the second-order corner state显示文摘Topological lasers are immune to imperfections and disorder.They have been recently demonstrated based on many kinds of robust edge states,which are mostly at the microscale.The realization of 2D on-chip topological nanolasers with a small footprint,a low threshold and high energy efficiency has yet to be explored.Here,we report the first experimental demonstration of a topological nanolaser with high performance in a 2D photonic crystal slab.A topological nanocavity is formed utilizing the Wannier-type 0D corner state.Lasing behaviour with a low threshold of approximately 1μW and a high spontaneous emission coupling factor of 0.25 is observed with quantum dots as the active material.Such performance is much better than that of topological edge lasers and comparable to that of conventional photonic crystal nanolasers.Our experimental demonstration of a low-threshold topological nanolaser will be of great significance to the development of topological nanophotonic circuitry for the manipulation of photons in classical and quantum regimes. | Weixuan Zhang Xin Xie Huiming Hao Jianchen Dang Shan Xiao Shushu Shi Haiqiao Ni Zhichuan Niu Can Wang Kuijuan Jin Xiangdong Zhang Xiulai Xu | 2020 | Light(Science & Applications)2020，9，1： | 10 |
| 9 | A new type of ice formation zone found in the Himalayas显示文摘Ice formation was studied on the Dasuopu Glacier located in the Mount Xixabangma (28°23’ N, 85°43’E) in the Himalayas. Snow pits and shallow ice cores are analyzed to reveal ice formation process. The results show that the ice formation process, or in other words, the process of densitification, on the col (7 000 m a.s.l. ) of the Dasuopu Glacier is a stable, slow and gradual process. The snow-ice transformation on the glacier is estimated to be 30—40 m below the surface. The temperature on the Dasuopu Glacier is very low (~ - 14℃ at 10 m) and similar to that in polar type ice cap. We,therefore, speculate that the process of snow-ice transformation is undertaken under snow pressure,and that there is a percolation zone on the Dasuopu Glacier. The high altitude of the col and monsoon snow fall accompnied by heavy cloud and high albedo favorite the percolation zone formation. | Tandong Yao Jianchen Pu Ninlian Wang Lide Tian | 1999 | Chinese Science Bulletin1999，44，5： | 7 |
| 10 | Compositional characteristics of n-alkanes of the glaciers over the Tibetan Plateau and their environmental and climatic significances显示文摘We report on the concentration and compositional features of n-alkanes of natural and anthropogenic origins in the snow samples collected from the Qiyi glacier in the Qilian Mountains, the Yuzhufeng glacier in eastern Kunlun Mountains, the Xiaodongkemadi glacier in the Tanggula Mountains, and the Gurenhekou glacier in the Nyainqêntanglha Range. The results indicate a decrease in the total n-alkane concentration (T-HCs) from the northeast to the south over the Tibetan Plateau. The T-HCs in these studied areas were close to those in the Belukha and Sofiyskiy glacier, Russian Alati Mountains and the Dasuopu glacier in the Himalaya but were much higher than those in the Greenland ice sheet, suggesting that the mountain glaciers in the Asian continent may receive a higher loading of n-alkanes than the Greenland ice core. Moreover, the compositional characteristics of n-alkanes indicated that the n-alkanes in the studied areas were probably originated from the plant waxes as well as the fossil-fuel combustion exhaust, whereas the contribution from the lower organisms was small. In addition, the plant wax (Cn(wax)) and anthropogenic (non-Cn(wax)) contributions revealed that fast industrialization may have significant effects on the organic pollutant composition in glacier over the Tibetan Plateau and its circumference environment. Particularly, except for the Yuzhufeng glacier, the ΣnC21-/ΣnC22+ and (nC15+nC17+nC19)/(nC27+nC29+nC31) ratio decreased from the Qiyi glacier to the Gurenhekou glacier over the Tibetan Plateau, while the carbon preference index (CPI) values increased. These results indicate a decrease in terrigenous input while an increase in marine input from the northeast to the south over the Tibetan Plateau. These two ratios can be used as the climatic and environmental change indicators. | LI QuanLian WANG NingLian WU XiaoBo PU JianChen HE JianQiao XIE Jun | 2009 | Science China Earth Sciences2009，52，11： | 6 |
| 11 | SINGLE-PERIOD TWO-PRODUCT INVENTORY MODEL WITH SUBSTITUTION:SOLUTION AND PROPERTIES显示文摘In this paper, we study a single-period two-product inventory model with stochastic demands and downward substitution. The optimal order quantities are presented and some properties are provided. Comparing with newsboy model, we prove that both the profit and the fill rate can be improved by using the substitution policy. | LianqiaoCAI JianCHEN HouminYAN | 2004 | Systems Science and Systems Engineering2004，13，1： | 6 |
| 12 | Response of monsoon vari-ability in Himalayas to global warming显示文摘Reconstructed annual net accumulation from the Dasuopu ice core recovered in Himalayas, with a good correlation to Indian monsoon, reflects a major precipitation trend in central Himalayas. The Dasuopu accumulation (DSP An) also shows a strong correlation to the Northern Hemispheric temperature. Generally, as the Northern Hemispheric temperature increases by 0.1 K, the accumulation decreases by about 90 mm and vise versa. Under the condition of global warming, especially since 1920, the Northern Hemispheric mean temperature has increased by about 0.5 K, whereas accumulation in Dasuopu ice core has decreased by about 450 mm. According to the relationship between accumulation and temperature, a scenario prediction of monsoon rainfall in central Himalayas is made. | DUAN Keqin YAO Tandong PU Jianchen SUN Weizhen | 2002 | Chinese Science Bulletin2002，47，21： | 6 |
| 13 | Sources and distribution of polycyclic aromatic hydrocarbons of different glaciers over the Tibetan Plateau显示文摘Twenty snow samples were collected from the Qiyi glacier in Qilian Mountains,the Yuzhufeng glacier in eastern Kunlun Mountains,the Xiaodongkemadi glacier in Tanggula Mountains,and the Gurenhekou glacier in Nyainqêntanglha Range over the Tibetan Plateau.The concentration and distribution features of sixteen priority Polycyclic Aromatic Hydrocarbons (PAHs) were determined by gas chromatography equipped with a mass spectrometry detector (GC-MS).The sources of these PAHs were explored as well.Our results indicated that the average concentrations of PAHs in snow were in the range of 20.45 60.57 ng/L.Maximum PAHs levels were found in the YZF glacier andminimum in the XDKMD glacier.However,no apparent regional distribution pattern of PAHs was found in the glaciers over the Tibetan Plateau.Moreover,the 2 4 ring low molecular weight PAHs predominated in snow samples and the concentrations of phenanthrene was the highest.Integrated factor analysis and isomer pair ratios suggested that PAHs of glaciers over the Tibetan Plateau were derived from low temperature combustion of coal and biomass,and partially from the exhaust gas of locomotives.Air mass back trajectory indicated that organic compounds detected in snowpit of these four glaciers,in the period of time they represented,mainly came from Central Asia and the arid area of Northwest China by westerly wind circulation. | LI QuanLian WANG NingLian WU XiaoBo PU JianChen HE JianQiao ZHANG ChunWen | 2011 | Science China Earth Sciences2011，54，8： | 5 |
| 14 | Improvement of Mechanical Properties of Wood-Plastic Composite Floors Based on the Optimum Structural Design显示文摘A study is carried out on the structural design of wood-plastic composite floors. The geometric parameters of the cavities, the structure, and the means to optimize the performance of these light boards are investigated. Various structural parameters of the boards, such as size,shape, and the pattern of cavities are also studied. The optimal structure can be determined by calculation and analysis of the strength, stiffness, weight and cost of the material. A finite element model for the mechanical analysis of wood-plastic composite floors is established; and the results are used to verify the strength criteria under bending deformation, which is the most common loading condition of flooring board. | Yang Zhang Ping Xue Yun Ding Mingyin Jia Jianchen Cai Xiaoming Jin | 2016 | Acta Mechanica Solida Sinica2016，29，4： | 5 |
| 15 | Events of abrupt change of Indian monsoon recorded in Dasuopu ice core from Himalayas显示文摘Three ice cores distributed across Dasuopu glacier in Himalayas were recovered. A 400-year net annual accumulation record reconstructed from one of the cores reflects the major precipitation trend in the central Himalayas. This record is related closely to the Indian monsoon precipitation. Wavelet and moving T-test were applied to the 400-year-long Dasuopu accumulation record, and significant staggered variability and abrupt change of the record on interannual to centennial time scales are identified. Finally the possible reason for abrupt change of the accumulation record is discussed. | Keqin Duan Ninglian Wang Jianchen Pu | 2002 | Chinese Science Bulletin2002，47，8： | 5 |
| 16 | High-average-power, high-repetition-rate tunable terahertz difference frequency generation with GaSe crystal pumped by 2 μm dual-wavelength intracavity KTP optical parametric oscillator显示文摘We have demonstrated a high-average-power,high-repetition-rate optical terahertz(THz)source based on difference frequency generation(DFG)in the GaSe crystal by using a near-degenerate 2μm intracavity KTP optical parametric oscillator as the pump source.The power of the 2μm dual-wavelength laser was up to 12.33 W with continuous tuning ranges of 1988.0–2196.2 nm/2278.4–2065.6 nm for two waves.Different GaSe cystal lengths have been experimentally investigated for the DFG THz source in order to optimize the THz output power,which was in good agreement with the theoretical analysis.Based on an 8 mm long GaSe crystal,the THz wave was continuously tuned from 0.21 to 3 THz.The maximum THz average power of 1.66μW was obtained at repetition rate of 10 kHz under 1.48 THz.The single pulse energy amounted to 166 pJ and the conversion efficiency from 2 μm laser to THz output was 1.68×10^(-6).The signal-to-noise ratio of the detected THz voltage was 23 dB.The acceptance angle of DFG in the GaSe crystal was measured to be 0.16°. | DEXIAN YAN YUYE WANG DEGANG XU PENGXIANG LIU CHAO YAN JIA SHI HONGXIANG LIU YIXIN HE LONGHUANG TANG JIANCHEN FENG JIANQIN GUO WEI SHI KAI ZHONG YUEN H.TSANG JIANQUAN YAO | 2017 | Photonics Research2017，5，2： | 5 |
| 17 | Environmental information recorded in shallow ice core of Dasuopu glacier in the Qinghai-Tibetan Plateau显示文摘 | Cuilan Huang Tandong Yao Jianchen Pu Keqin Duan Ninglian Wang Lide Tian | 1998 | Chinese Science Bulletin1998，43，22： | 5 |
| 18 | STUDIES ON HORIZONTAL COMPETITION AMONG HOMOGENOUS RETAILERS THROUGH AGENT-BASED SIMULATION显示文摘This paper adopts agent-based simulation to study the horizontal competition among homogenous price-setting retailers in a one-to-many supply chain (a supply chain consists of one supplier and multiple retailers). We model the supplier and retailers as agents, and design their behavioral rules respectively. The results show that although the agents learn individually based on their own experiences, the system converges asymptotically to near Nash equilibrium steady states. When analyzing the results, we first discuss the properties of these steady states. Then based on these properties, we analyze the effects of the retailers’ horizontal competition on the retail prices, retailers’ profits and supplier’s revenue. | MingXIE JianCHEN | 2004 | Systems Science and Systems Engineering2004，13，4： | 4 |
| 19 | Erythrocyte membrane-camouflaged carrier-free nanoassembly of FRET photosensitizer pairs with high therapeutic efficiency and high security for programmed cancer synergistic phototherapy显示文摘Phototherapy has been intensively investigated as a non-invasive cancer treatment option.However,its clinical translation is still impeded by unsatisfactory therapeutic efficacy and severe phototoxicity.To achieve high therapeutic efficiency and high security,a nanoassembly of Forster Resonance Energy Transfer(FRET)photosensitizer pairs is developed on basis of dual-mode photosensitizer co-loading and photocaging strategy.For proof-of-concept,an erythrocyte-camouflaged FRET pair co-assembly of chlorine e6(Ce6,FRET donor)and 1,1′-dioctadecyl-3,3,3′,3′-tetramethylindotricarbocyanine iodide(DiR,FRET acceptor)is investigated for breast cancer treatment.Notably,Ce6 in the nanoassemby is quenched by DiR and could be unlocked for photodynamic therapy(PDT)only when DiR is photobleached by 808-nm laser.As a result,Ce6-caused phototoxicity could be well controlled.Under cascaded laser irradiation(808-660 nm),tumor-localizing temperature rise following laser irradiation on DiR not only induces tumor cell apoptosis but also facilitates the tumor penetration of NPs,relieves tumor hypoxia,and promotes the PDT efficacy of Ce6.Such FRET pair-based nanoassembly provides a new strategy for developing multimodal phototherapy nanomedicines with high efficiency and good security. | Xuanbo Zhang Jianchen Xiong Kaiyuan Wang Han Yu Bingjun Sun Hao Ye Zhiqiang Zhao Ning Wang Yuequan Wang Shenwu Zhang Wutong Zhao Haotian Zhang Zhonggui He Cong Luo Jin Sun | 2021 | Bioactive Materials2021，6，8： | 4 |
| 20 | Entropy,Periodicity,and Graphs with Zero Euler Characteristic显示文摘Let G be a graph which contains exactly one simple closed curve. We prove that a continuous map f : G → G has zero topological entropy if and only if there exist at most k ≤ |(Edg(G)+ End(G)+3)/2] different odd numbers n1,...,nk such that Per(f) is contained in ∪i=1^k ∪j=0^∞ ni2^j, where Edg(G) is the number of edges of G and End(G) is the number of end points of G. | JieLU JinChengXIONG JianCHEN | 2004 | Acta Mathematica Sinica,English Series2004，20，3： | 3 |
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