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Journal of Ocean University of China 2019年第6期18卷 1351-1359页

作者： YANG Jiao du zhiheng XIAO Cunde State Key Laboratory of Cryospheric Science Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China State Key Laboratory of Earth Surface Processes and Resource Ecology Beijing Normal UniversityBeijing 100875China College of Resources and Environment University of Chinese Academy of SciencesBeijing 100049China

Antarctic sea ice has experienced an increasing trend in recent decades,especially in the Ross Sea and Indian Ocean *** ice variability affects greatly the maritime airmass transport from high latitude to Antarctic *** we present a new ice core record of sea salt sodium(ssNa+)concentration at annual-resolution in the Princess Elizabeth Land spanning from 1990 to 2016,showing that this marker could be used as a potential proxy for reconstructing the sea ice extent(SIE)in the Southern Indian Ocean(SIO)given their significant correlation(R=-0.6,Pduring positive IOD and the strengthened westerlies occurs during positive SAM,both of which favor increased sea ice in SIO and lead to the decreased ssNa^+concentration at the coastal site.

关键词： ice core East Antarctica sea ice climate change southern Indian Ocean

Isolation and Characterization of 15 Microsatellite DNA Loci for the Alpine Stream Frog Scutiger boulengeri (Anura： Megophryidae)

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Asian Herpetological Research 2016年第4期7卷 298-300页

作者： zhiheng du Chunzhu XU Fangyong NING Northeast Agricultural University Harbin 150030 Heilongjiang China

Fifteen microsatellite DNA markers were developed from a transcriptome assembly of the alpine stream frog （Scutiger boulengeri）.To characterize these loci, we genotyped 23 individuals collected from two sites. Eleven loci were variable, with the number of alleles ranging from one to six within each population. The expected and observed heterozygosities ranged from 0 to 0.78 and from 0 to 0.64, respectively. None of the loci was in linkage disequilibrium and one locus for one population was deviated from will offer useful tools in detecting population structure Tibetan Plateau, where the species resides. the Hardy-Weinberg equilibrium. We hope that these markers of S. boulengeri and in monitoring the fragile ecosystem of the

关键词： Alpine stream frogs Microsatellite DNA Tibetan Plateau Scutiger boulengeri

Temperate ice layer found in the upper area of Jima Yangzong Glacier,the headstream of Yarlung Zangbo River

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Science Bulletin 2016年第8期61卷 619-621页

作者： Tong Zhang Minghu Ding Cunde Xiao Dongqi Zhang zhiheng du Institute of Climate System Chinese Academy of Meteorological SciencesBeijing 100081China State Key Laboratory of Cryospheric Sciences Cold and Arid Regions Environmental and Engineering Research InstituteChinese Academy of SciencesLanzhou 730000China

For the first time we investigate the basal thermal condition in the upper area of Jima Yangzong Glacier, the headstream of Yarlung Zangbo River, using ground-penetrating radar techniques. With common offset and common mid-point surveys we analyze the radar velocities in ice with respect to cold-temperate ice transi- tion surface （0.1751 0.0028 m ns-~） and ice-bedrock interface （0.1657 ＋ 0.0033 m ns-a）, indicating a radar velocity of 0.1410 4- 0.0154 m ns-1 for the temperate ice layer （16.6 ~ 1.8 m）. We estimate that the temperate ice layer has a water content of around 6 % 4- 4 %, suggesting that the Jima Yangzong Glacier, previously known as continental-type, now possibly becomes polythermal.

关键词： Jima Yangzong Glacier YarlungZangbo River - Ground-penetrating radar Radarvelocity - Englacial water content Polythermal

Observed features of stable surface seawater isotopes across the Pacific, Indian and Southern oceans

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Acta Oceanologica Sinica 2024年第10期43卷 33-39页

作者： Xuemei Wu Weijun Sun Biao Tian Baojuan Huai zhiheng du Minghu Ding College of Geography and Environment Shandong Normal UniversityJinan 250014China State Key Laboratory of Severe Weather Chinese Academy of Meteorological SciencesBeijing 100081China State Key Laboratory of Cryospheric Science Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China

The marine hydrological process is still unclear due to scarce *** on stable water isotopes in surface seawater along the 33rd Chinese National Antarctic Science Expedition from November 2016 to April 2017,this study explored the hydrological processes in the Pacific,Indian and Southern *** results show that the Northwest Pacific(0°–26°N)is a region with strong evaporation(theδ18O-δD slope is 6.58),while the southern Indian Ocean is a region with strong precipitation(theδ18O-δD slope is 9.57).The influence of continental runoff and water mass mixing reduces the correlation betweenδ18O and salinity in the eastern Indian *** characteristics of the isotopes and hydrological parameters indicate that the Agulhas Front and sub-Tropical Convergence do not merge in the Antarctic–Indian Ocean *** freezing of sea ice near the Antarctic continent decreases theδ18O andδD by 0.40‰and 7.0‰,respectively,compared with those near 67°*** study is helpful for understanding marine hydrological processes and promoting the understanding and research of the nature of ocean responses in the context of climate change.

关键词： spatial variability surface seawater isotopes δ18O-salinity relation water mass fronts

A Statistical Linkage between Extreme Cold Wave Events in Southern China and Sea Ice Extent in the Barents-Kara Seas from 1289 to 2017

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Advances in Atmospheric Sciences 2023年第12期40卷 2154-2168页

作者： Cunde XIAO Qi ZHANG Jiao YANG zhiheng du Minghu DING Tingfeng DOU Binhe LUO State Key Laboratory of Earth Surface Processes and Resource Ecology Beijing Normal UniversityBeijing 100875China State Key Laboratory of Severe Weather Chinese Academy of Meteorological SciencesBeijing 100081China State Key Laboratory of Cryospheric Science Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China College of Resources and Environment University of Chinese Academy of SciencesBeijing 100049China

Arctic sea ice loss and the associated enhanced warming has been related to midlatitude weather and climate changes through modulate meridional temperature gradients linked to circulation. However, contrasting lines of evidence result in low confidence in the influence of Arctic warming on midlatitude climate. This study examines the additional perspectives that palaeoclimate evidence provides on the decadal relationship between autumn sea ice extent (SIE) in the Barents-Kara (B-K) Seas and extreme cold wave events (ECWEs) in southern China. Reconstruction of the winter Cold Index and SIE in the B-K Seas from 1289 to 2017 shows that a significant anti-phase relationship occurred during most periods of decreasing SIE, indicating that cold winters are more likely in low SIE years due to the “bridge” role of the North Atlantic Oscillation and Siberian High. It is confirmed that the recent increase in ECWEs in southern China is closely related to the sea ice decline in the B-K Seas. However, our results show that the linkage is unstable, especially in high SIE periods, and it is probably modulated by atmospheric internal variability.

关键词： extreme cold wave events sea ice Barents-Kara(B-K)Seas Arctic southern China

Spatial variability ofδ^(18)O andδ^(2)H in North Pacific and Arctic Oceans surface seawater

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Advances in Polar Science 2022年第3期33卷 244-252页

作者： LI Zhiqiang DING Minghu WANG Yetang du zhiheng DOU Tingfeng National Marine Environmental Forecasting Center Beijing 100081China State Key Laboratory of Severe Weather and Institute of Tibetan Plateau&Polar Meteorology Chinese Academy of Meteorological SciencesBeijing 100081China State Key Laboratory of Cryospheric Science Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China College of Geography and Environment Shandong Normal UniversityJinan 250014China College of Resources and Environment University of Chinese Academy of SciencesBeijing 100049China

This study presents new observations of stable isotopic composition(δ^(18)O,δ^(2)H and deuterium excess)in surface waters of the North Pacific and Arctic Oceans that were collected during the sixth Chinese National Arctic Research Expedition(CHINARE)from mid-summer to early autumn ***δ^(18)O andδ^(2)H decrease with increasing latitudes from 39°N to 75°N,likely a result of spatial variability in evaporation/precipitation *** explanation is further confirmed by comparing theδ^(18)O-δ^(2)H relationship of seawater with that of ***,effects of freshwater inputs on seawater stable isotopic composition are also identified at 30°N-39°***,we find a non-significant relationship between the isotopic parameters(δ^(2)H andδ^(18)О)and salinity from 73°N northwards in the Arctic Ocean,implying that sea ice melting/formation may have some *** results suggest that the isotopic parametersδ^(2)H andδ^(18)Оare useful for tracing marine hydrological processes.

关键词： stable water isotopes seawater salinity surface seawater North Pacific Ocean Arctic Ocean

Migration and role of zinc in biogeochemical cycles in the Antarctic Ice Sheet and the Southern Ocean

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Advances in Polar Science 2024年第2期35卷 157-177页

作者： LIU Jingwen LI Chuanjin du zhiheng SHI Guitao DING Minghu SUN Bo XIAO Cunde State Key Laboratory of the Cryosphere Science Northwest Institute of the Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China University of Chinese Academy of Sciences Beijing 100049China Key Laboratory of Polar Science MNRPolar Research Institute of ChinaShanghai 200136China Key Laboratory of Geographic Information Science(Ministry of Education) School of Geographic Sciences and Institute of Eco-ChongmingEast China Normal UniversityShanghai 200241China Institute of Global Change and Polar Meteorology Chinese Academy of Meteorological SciencesBeijing 100081China State Key Laboratory of Earth Surface Processes and Resource Ecology Beijing Normal UniversityBeijing 100875China

Zinc(Zn),a widespread metal in the Earth’s crust,serves as a crucial nutrient in the Southern Ocean’s primary *** on Zn in Antarctic snow and ice offer insights into the origins of this metal and its transport routes,as well as its impact on the biogeochemical processes within the Antarctic atmosphere–land–ocean *** review examines research on the spatial and temporal distribution of Zn in Antarctic snow and ice,as well as in Southern Ocean *** includes an overview of advanced methods for sampling and analyzing Zn,along with explanations for the observed *** review also discusses various sources of Zn as a nutrient to the Southern ***,it addresses prospective issues related to the use of Zn isotopes in identifying atmospheric sources and their biogeochemical effects on the development of the Southern Ocean ecosystem.

关键词： zinc biogeochemical cycles Antarctic Ice Sheet Southern Ocean

Sources, evolution and impacts of EC and OC in snow on sea ice： a measurement study in Barrow, Alaska

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Science Bulletin 2017年第22期62卷 1547-1554页

作者： Tingfeng Dou Cunde Xiao zhiheng du J. J. Schauer Hong Ren Baozhu Ge Aihong Xie Jihua Tan Pingqing Fu Yuanxun Zhang College of Resources and Environment University of Chinese Academy of Sdences Beijing 100049 China State Key Laboratory of Cryospheric Sciences Northwest Institute of Eco-Environment and Resources Chinese Academy of Sciences Lanzhou 730000 China State Key Laboratory of Earth Surface Processes and Resource Ecology Beijing Normal University Beijing 100875 China Environmental Chemistry and Technology Program University of Wisconsin-Madison Madison Wl 53706 USA state Key Laboratory of Atmospheric Boundary Layer Physics-an-d Atmospheric Chemistry Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China Huairou Eco-Environmental Observatory Chinese Academy of Sciences Beijing 101408 China Institute of Surface-Earth System Science Tianjin University Tianjin 300072 China

Based on the field measurements in Barrow, Alaska within the period of April-May 2015, we investigate the sources and variations of elemental carbon(EC) and organic carbon(OC) in the surface layer of snowpack on sea ice, and estimate their effects on the sea ice albedo. Results show that the snow OC in Barrow are from natural sources(e.g. terrestrial higher plants and micro-organisms) mainly, as well as biomass burning(e.g. forest fires and straw combustion) as an important part. Both EC and OC can accumulate at the snow surface with snow melt. The variations in EC and OC and liquid water content in the snow layer are well consistent during the snow-melting period. A higher rate of snow melt implied a more efficient enrichment of EC and OC. In the last phase of snow melt, the concentration increased to a maximum of 16.2 ng/g for EC and 128 ng/g for OC, which is ~10 times larger than those before snow melt onset. Except for the dominant influence of melt amplification mechanism, the variation in concentrations of EC and OC could be disturbed by the air temperature fluctuation and snowfall. Our study indicates that the lightabsorbing impurities contributed 1.6%-5.1% to the reduction in sea ice albedo with melt during the measurement period. The significant period oflight-absorbing impurities influencing on sea ice albedo begins with the rapid melting of overlying snow and ends before the melt ponds formed widely, which lasted for about 10 days in Barrow, 2015.

关键词： Arctic EC OC Sea ice Albedo Barrow

Accumulation and geochemical evidence for the Little Ice Age episode in eastern Antarctica

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Research in Cold and Arid Regions 2019年第1期11卷 50-61页

作者： ChuanJin Li JiaWen Ren CunDe Xiao MingHu Ding AiHong Xie zhiheng du XiangYu Ma DaHe Qin State Key Laboratory of the Cryospheric Science Northwest Institute of Eco-Environment and Resources Chinese Academy of Sciences State Key Laboratory of Earth Surface Processes and Resource Ecology Beijing Normal University Institute of Climate System (Polar Meteorology) Chinese Academy of Meteorological Sciences

Data on accumulation and concentration of chemical compounds recorded in an essentially unexplored area(Dome Argus)of the Indian Ocean sector of eastern Antarctica during the past 2,680 years(680 B.C. to 1999 A.D.) are presented. during the first 1, 700 years(680 B. C. to 1000 A. D.), the accumulation data shows a slightly decreasing trend, while chemical ions appear to be stable, representing a stable climatic condition. An intensive increasing trend of the accumulation occurred during the 12^(th) to 14^(th) century. The period from 15^(th) to 19^(th) century was characterized by a rapid reducing accumulation and concentrations of volatile compounds suffering post-depositional loss linked to sparse precipitation amount,which was temporally consistent with the Little Ice Age(LIA) episode. Comparison between observed accumulation rates with other eastern Antarctic ice cores show a consistent decreasing trend during LIA, while sea salt and dust-originated ions increased due to sea ice extent and intensified atmospheric transportation. Distribution of volcanic originated sulfate over the Antarctic continent show a significant change during the 15^(th) century, coincident with the onset of the LIA. These results are important for the assessment of Antarctic continent mass balance and associated interpretation of the Dome A deep ice core records.

关键词： accumulation rates sea salt chemical compounds Little Ice Age eastern Antarctica

Iron in the NEEM ice core relative to Asian loess records over the last glacial–interglacial cycle

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National Science Review 2021年第7期8卷 110-123页

作者： Cunde Xiao zhiheng du Mike J Handley Paul A Mayewski Junji Cao Simon Schupbach Tong Zhang Jean-Robert Petit Chuanjin Li Yeongcheol Han Yuefang Li Jiawen Ren State Key Laboratory of Earth Surface Processes and Resource Ecology Beijing Normal University State Key Laboratory of Cryospheric Science Northwest Institute of Eco-Environment and Resources Chinese Academy of Sciences Climate Change Institute School of Earth and Climate Sciences University of Maine Key Laboratory of Aerosol Science and Technology SKLLQG Institute of Earth Environment Chinese Academy of Sciences Climate and Environmental Physics Physics Institute University of Bern 6. Institute of Tibetan Plateau and Polar Meteorology Chinese Academy of Meteorological Sciences 7. Institut des Geosciences de I'Environment (IGE) University Grenoble Alpes 8. Korea Polar Research Institute

Mineral dust can indirectly affect the climate by supplying bioavailable iron(Fe) to the ocean. Here, we present the records of dissolved Fe(DFe) and total Fe(TDFe) in North Greenland Eemian Ice Drilling(NEEM) ice core over the past 110 kyr BP. The Fe records are significantly negatively correlated with the carbon-dioxide(CO2) concentrations during cold periods. The results suggest that the changes in Fe fluxes over the past 110 kyr BP in the NEEM ice core are consistent with those in Chinese loess records because the mineral-dust distribution is controlled by the East Asian deserts. Furthermore, the variations in the dust input on a global scale are most likely driven by changes in solar radiation during the last glacial–interglacial cycle in response to Earth’s orbital cycles. In the last glacial–interglacial cycle, the DFe/TDFe ratios were higher during the warm periods(following the post-Industrial Revolution and during the Holocene and last interglacial period) than during the main cold period(i.e. the last glacial maximum(LGM)), indicating that the aeolian input of iron and the iron fertilization effect on the oceans have a non-linear relationship during different periods. Although the burning of biomass aerosols has released large amounts of DFe since the Industrial Revolution, no significant responses are observed in the DFe and TDFe variations during this period, indicating that severe anthropogenic contamination has no significant effect on the DFe(TDFe)release in the NEEM ice core.

关键词： Greenland NEEM ice core iron fertilization carbon dioxide Chinese loess glacial–interglacial cycle