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| 1 | Ice radar investigation at Dome A, East Antarctica:Ice thickness and subglacial topography显示文摘Dome A, located in the central East Antarctic ice sheet (EAIS), is the highest summit of the Antarctic ice sheet. From ice-sheet evolution modeling results, Dome A is likely to preserve over one million years of the Earth's paleo-climatic and -environmental records, and considered an ideal deep ice core drilling site. Ice thickness and subglacial topography are critical factors for ice-sheet models to determine the timescale and location of a deep ice core. During the 21st and 24th Chinese National Antarctic Research Expedition (CHINARE 21, 2004/05; CHINARE 24, 2007/08), ground-based ice radar systems were used to a three-dimensional investigation in the central 30 km×30 km region at Dome A. The successfully obtained high resolution and accuracy data of ice thickness and subglacial topography were then interpolated into the ice thickness distribution and subglacial topography digital elevation model (DEM) with a regular grid resolution of 140.5 m×140.5 m. The results of the ice radar investigation indicate that the average ice thickness in the Dome A central 30 km×30 km region is 2233 m, with a minimal ice thickness of 1618 m and a maximal ice thickness of 3139 m at Kunlun Station. The subglacial topography is relatively sharp, with an elevation range of 949-2445 m. The typical, clear mountain glaciation morphology is likely to reflect the early evolution of the Antarctic ice sheet. Based on the ice thickness distribution and subglacial topography characteristics, the location of Kunlun Station was suggested to carry out the first high-resolution, long time-scale deep ice core drilling. However, the internal structure and basal environments at Kunlun Station still need further research to determine. | CUI XiangBin SUN Bo TIAN Gang TANG XueYuan ZHANG XiangPei JIANG YunYun GUO JingXue LI Xin | 2010 | Chinese Science Bulletin2010，55，4： | 11 |
| 2 | Preliminary results of ice radar investigation along the traverse between Zhongshan and Dome A in East Antarctic ice sheet:Ice thickness and subglacial topography显示文摘During the 24th Chinese National Antarctic Research Expedition(CHINARE 24,2007/08),a ground-based ice radar was used to survey ice thickness and subglacial topography along the 1170 km traverse between Zhongshan and Dome A in East Antarctic ice sheet(EAIS).Ice-bedrock interface was detected along 82%of the traverse and data was collected at a horizontal resolution of <5.6 m.The data was processed to produce curves of ice thickness distribution and subglacial topography along the traverse.The results indicate that,along the traverse,the average ice thickness is 2037 m,smaller than the average ice thickness in EAIS;the thickest ice is at 730 km,and the thinnest ice(891 m)is at the edge of the ice sheet,but the slightly larger ice thickness(1078 m) in inland appears at 1020 km;the average subglacial topography elevation is 728 m,greatly larger than the average value in EAIS, and the largest elevation reaches up to 2650 m at 1034 km.The lowest terrain is located at 765 km.In further inland of 900?1170 km,the subglacial topography is relatively high due to the existence of the Gamburtsev Subglacial Mountains in the region.Generally,the influence of subglacial topography on ice surface is not significant,except at 900 km where great rise of subglacial topography causes evident uplift of ice surface.Where ice-bedrock interface was detected,the frequent and strong change of ice thickness and subglacial topography in small-scale means large bedrock roughness along the traverse,and is considered as the result of the integrated influence of ice flow,basal environments and geology.The segment where bedrock was not detected has very large ice thickness.The strong ice flow there also makes internal structure more complicated and induces serious attenuation of radar signals. | CUI XiangBin SUN Bo TIAN Gang TANG XueYuan ZHANG XiangPei JIANG YunYun GUO JingXue LI Xin | 2010 | Chinese Science Bulletin2010，55，24： | 8 |
| 3 | Surface mass balance and its climate significance from the coast to Dome A, East Antarctica显示文摘Based on stake measurements conducted along the Chinese Antarctic traverse since Jan.1999,we investigated the characteristics of surface mass balance(SMB)and related climate consequences from Zhongshan Station to Dome A,East Antarctica.Spatial analysis suggests that post-depositional processes have a great impact on surface morphology;thus,the representativeness of a single measurement should be discussed in conjunction with local climate features.The comparison among snow accumulation,ice sheet thickness,surface elevation,and ice velocity indicates that the bedrock topography has an indirect connection with the SMB patterns through controlling the surface topography and local climate.The observation reveals that the Lambert Glacier Basin has been experiencing increasing mass input(4.5%),whereas the inland area has experienced a 6%loss,since 2005.An overall estimation of the SMB along the route is 71.3±44.3 kg m?2 a?1,but the annual and regional variation is considerable.Tendency analysis shows that there are four sections with different SMB patterns as a result of three moisture sources and surface climatic discrepancy in the Antarctic inland.This study is the first to identify four SMB patterns from the coast to the Dome area and should provide a valuable contribution to modeling and remote sensing on a continental scale. | DING MingHu XIAO CunDe LI ChuanJin QIN DaHe JIN Bo SHI GuiTao XIE AiHong CUI XiangBin | 2015 | Science China Earth Sciences2015，58，10： | 7 |
| 4 | Structure of the internal isochronous layers at Dome A,East Antarctica显示文摘Dome A (Kunlun Station) is considered a likely place for finding an ice core record reaching back to one million years. The internal isochronous layering of the Antarctic Ice Sheet, revealed by ice radar, is a prerequisite for selecting sites for deep ice core drilling that can be used for studying the paleoclimatic record. In 2004/2005, during the 21st Chinese National Antarctic Research Expedition (CHINARE 21), a 200-km long, continuous radar profile was obtained across Dome A. The internal layers along the profile were derived from the stratigraphy detected by the radar. The morphology of the isochronous layers shows that: (1) The internal layers in the shallow ice sheet (0-500 m) are generally flat, with no more than 50 m of layer intervals, and have typical synclines and anticlines in some localized regions. (2) At 500-2000 m below the surface of the ice sheet, the layers appear as 'bright layers', and the width of the layer intervals expands to 50-100 m. (3) When the basal topographic wavelengths are approximate to the thickness of the ice (3 km), the traced internal layers, with localized bumps or concave folds, are asymptotic parallel to the subglacial topography. For the longer topographic wavelengths (~20 km) wider than the thickness of the ice, the layers do not rise and fall with the basal topography. The internal layers surrounding some mountain peaks representing the most extreme variation in the terrain are sharply disturbed by the subglacial topography. (4) Layer discontinuity and fracture were detected in the basal ice sheet. Finally, by combining this new information with that derived from existing data regarding ice thickness, we were able to select three potential sites for reconstructing the age-depth relationship of the ice core. | TANG XueYuan SUN Bo ZHANG ZhanHai ZHANG XiangPei CUI XiangBin LI Xin | 2011 | Science China Earth Sciences2011，54，3： | 6 |
| 5 | Chinese radioglaciological studies on the Antarctic ice sheet: progress and prospects显示文摘Chinese radioglaciological studies on the Antarctic ice sheet(AIS) began in 2004/05 when the 21 st Chinese National Antarctic Research Expedition(CHINARE 21) team arrived at Dome A for the first time and radio echo sounding(RES) was conducted along the inland traverse and in the Dome A region. Subsequently, more field surveys were conducted along the traverse and in the Dome A region using different radar systems targeting different scientific purposes, such as revealing the landscape of the Gamburtsev Subglacial Mountains by detailed grid RES, or locating a deep ice core drilling site by mapping and studying internal structures, bedrock topography and subglacial conditions in the Dome A region. Furthermore, the evolution of the AIS was inferred from the typical mountain glaciation topography beneath Dome A, and the age of the deep ice core at Kunlun Station was estimated through numerical modeling. Recently, the Snow Eagle 601 airplane was acquired and an airborne geophysical system was constructed to survey the AIS in Princess Elizabeth Land during CHINARE 32(2015/16) and CHINARE 33(2016/17) in order to fill the large data gap there. In this paper, we review both the recent progress of Chinese radioglaciological science in Antarctica and future proposed work. | CUI Xiangbin WANG Tiantian SUN Bo TANG Xueyuan GUO Jingxue | 2017 | Advances in Polar Science2017，28，3： | 6 |
| 6 | Dome Argus: Ideal site for deep ice drilling显示文摘Located on the centre of ice drainage range, the highest Dome Argus (Dome A) of East Antarctic Ice Sheet (EAIS), could be represented as an ideal site for deep ice cores drilling containing oldest paleo-climate records. To select a suitable drilling site for deep ice core, it needs gather all information pertaining to the local meteorology, ice sheet landforms, ice thickness, subglacial topography of bed rocks, ice velocity, internal structures of ice sheet, etc. Based on the International Partnerships in Ice Core Sciences (IPICS), we present recent achievement of glaciological research and its perspective at Dome A in this paper. We system-atically discussed the merits and possible ventures of potential drilling sites around Dome A. Among all the candidates, we find that the Chinese Antarctic Kunlun Station is the best site for carrying out the first deep ice core drilling campaign. We emphasize and assess further the possibility to obtain a replicate core for studying dynamics and evolution of climate change. | TANG Xueyuan SUN Bo LIYuansheng LI Xin CUI Xiangbin | 2012 | Advances in Polar Science2012，23，1： | 5 |
| 7 | The molecular pathogenesis of achalasia:a paired lower esophageal sphincter muscle and serum 4D label-free proteomic study显示文摘Background:Achalasia is a primary esophageal motility disorder with potential molecular pathogenesis remaining uncertain.This study aimed to identify the differentially expressed proteins and potential pathways among achalasia subtypes and controls to further reveal the molecular pathogenesis of achalasia.Methods:Paired lower esophageal sphincter(LES)muscle and serum samples from 24 achalasia patients were collected.We also collected 10 normal serum samples from healthy controls and 10 normal LES muscle samples from esophageal cancer patients.The 4D label-free proteomic analysis was performed to identify the potential proteins and pathways involved in achalasia.Results:Analysis of Similarities showed distinct proteomic patterns of serum and muscle samples between achalasia patients and controls(both P<0.05).Functional enrichment analysis suggested that these differentially expressed proteins were immunity-,infection-,inflammation-,and neurodegeneration-associated.The mfuzz analysis in LES specimens showed that proteins involved in the extracellular matrix–receptor interaction increased sequentially between the control group,type III,type II,and type I achalasia.Only 26 proteins altered in the same directions in serum and muscle samples.Conclusions:This first 4D label-free proteomic study of achalasia indicated that there were specific protein alterations in both the serum and muscle of achalasia,involving immunity,inflammation,infection,and neurodegeneration pathways.Distinct protein clusters between types I,II,and III revealed the potential molecular pathways associated with different disease stages.Analysis of proteins changed in both muscle and serum samples highlighted the importance of further studies on LES muscle and revealed potential autoantibodies. | Songfeng Chen Xiangbin Xing Xun Hou Qianjun Zhuang Niandi Tan Yi Cui Jinhui Wang Mengyu Zhang Shixian Hu Yinglian Xiao | 2023 | Gastroenterology Report2023，11，1： | 0 |
| 8 | Clinical outcomes of asymptomatic low-grade esophagitis:results from a multicenter Chinese cohort显示文摘Background:Asymptomatic low-grade(Los Angeles Classification Grades A and B)esophagitis is common in clinical practice with unclear clinical outcomes.This study aimed to explore the clinical outcomes of asymptomatic low-grade esophagitis.Methods:This was a multicenter cohort study conducted by three academic hospitals in China.Asymptomatic low-grade esophagitis patients between January 2015 and December 2019 were included.Mucosal healing condition 1year after initial diagnosis,symptomoutcomes,and proton-pump inhibitor(PPI)use within 1year after initial diagnosis were studied and compared.Results:A total of 248 asymptomatic low-grade esophagitis patients were included.Esophagitis disappeared in 76.2%of patients 1 year after initial diagnosis.In terms of symptom outcomes,89.9%of patients did not present gastroesophageal reflux disease(GERD)symptoms within 1 year after initial diagnosis.No significant difference was found in the proportion of patients who presented GERD symptoms and in the proportion of patients with persistent esophagitis between the PPI group and the non-PPI group(all P>0.05).Patients with initial Grade B esophagitis were more likely to present follow-up GERD symptoms(16.0%vs 7.5%,P=0.041)and had more severe follow-up esophagitis than those with Grade A(P<0.001).Patients with follow-up GERD symptoms were more likely to have persistent esophagitis than those without.Conclusions:This study demonstrated that asymptomatic low-grade esophagitis had relatively benign clinical outcomes.Patients with initial Grade B esophagitis and patients with follow-up GERD symptoms were more likely to be those who are in genuine need of further follow-up and treatments. | Songfeng Chen Xuelian Xiang Xiaohao Zhang Qianjun Zhuang Niandi Tan Xun Hou Mengyu Zhang Junnan Hu Chaofan Duan Yi Cui Jinhui Wang Xiangbin Xing Nina Zhang Yinglian Xiao | 2022 | Gastroenterology Report2022，10，1： | 0 |
| 9 | Mass balance of the Antarctic Ice Sheet from 2013 to 2018 estimated using the input-output method with updated remote sensing products显示文摘The Antarctic Ice Sheet(AIS)has been losing ice mass and contributing to the rise in the global sea-level(GSL)for the last 4 decades,as quantified by using satellite observations.We developed a framework for implementing the state-of-the-art input-output(IO)method that has the advantage of explicit estimation of the mass balance of individual glaciers,basins and the continent.We estimated the mass balance of the AIS from 2013 to 2018 using improved observations and updated datasets recently made available,including annual ice flow velocity maps from the Inter-mission Time Series of Land Ice Velocity and Elevation(ITS_LIVE)dataset,the Bed Machine and the Princess Elizabeth Land(PEL)Earth System Science Data(ESSD)datasets,and the surface mass balance from the RACMO 2.3 system.For example,using the improved ice thickness data,the proposed method for ice discharge estimation enables a 10%reduction of uncertainty in ice discharge.During the period of 2013–2018,an ice discharge acceleration of 6.9±6.5 Gt yr^(–2)in West Antarctica(WA)was detected,which contributed significantly to the estimated mass loss of~1069 Gt(–178.2±108.9 Gt yr^(–1))in the AIS.On the other hand,Queen Maud Land,East Antarctica(EA),showed clearly a mass gain rate of 56.0±10.0 Gt yr^(–1)due to the regional increase in surface mass balance.Our results extended the estimation period by 3 years in comparison to the published study using the same annual velocity maps from the ITS_LIVE dataset.Furthermore,our results,along with those from other studies using the IO method,reassures the acceleration of recent mass loss in WA and Wilkes Land in EA,which are caused by glacier thinning and ice shelf basal melting.Compared with the long-term mass balance record since 1979,our results suggest that the mass loss in AIS accelerated in the last decade.The developed framework can be modified for mass balance estimation of the AIS or for other ice sheets by using velocity maps from other satellite data or from different periods. | Yuan CHENG Gang HAI Xiangbin CUI Da LV Gang QIAO Rongxing LI | 2023 | Science China Earth Sciences2023，66，7： | 0 |
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