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| 1 | No apparent lock-in depth of the Laschamp geomagnetic excursion: Evidence from the Malan loess显示文摘The first-order chronological framework of the long-term Chinese loess/paleosol sequences was based mainly on magnetostratigraphy. However, there remain arguments on the lock-in ages of the major geomagnetic reversals. This study systematically compared the stratigraphic locations of the Laschamp excursion and Henrich events (H4 at~39 ka and H5 at~48 ka) recorded by the Luochuan loess profile in the central Chinese Loess Plateau. Results show that the Lascchamp excursion is bracketed well by these two cold events, and the corresponding estimated age is between about 41.7-43.7 ka, which is close to the widely accepted age of ~40-41 ka for the excursion.Therefore, our new results do not suggest apparent lock-in effects in the last glacial Malan loess. | ZHU Rixiang1, LIU Qingsong1,2, PAN Yongxin1, DENG Chenglong1, ZHANG Rui1 & WANG Xianfeng3 1. Paleomagnetism and Geochronology Laboratory (SKL of Lithosphere Evolution), Institute of Geology and Geophysics, Chi- nese Academy of Sciences, Beijing 100029, China 2. Institute of Geophysics and Planetary Geophysics, University of California, Santa Cruz, CA 95064, USA 3. Department of Geology and Geophysics, University of Minnesota, Minneapolis, MN 55455, USA | 2006 | Science China Earth Sciences2006，49，9： | 12 |
| 2 | The record of paleoclimatic change from stalagmites and the determination of termination II in the south of Guizhou Province, China显示文摘A high-resolution climate record from 163.00 kaBP to 113.80 kaBP has been obtained through TIMS-U series dating and carbon and oxygen isotope analysis of the three large stalagmites from two caves in the south of Guizhou Province, China. The record of the oxygen isotopes from the stalagmites reveals that the undulation characteristics between the cooling event of the glacial period and the warming event of the interglacial period in the research area can compare well to those of ice cores, lake sediments, loess and deep sea sediments on the scale of ten-thousand years or millennium time scale. The climate undulation provided by the record of the stalagmites has a coherence with the global changes and a tele-connection to the paleoclimate changes in the north polar region. Our results suggest that the direct dynamics of paleo-monsoon circulation changes reflected in the record of the stalagmites might be caused by changes of the global ice volume, and in turn related to various factors, including the solar radiation strength at the mid-latitudes in the Northern Hemisphere, the southern extension of the ice-rafted event in the North Atlantic, and changes of the equatorial Pacific sea surface temperature at the low-latitudes. Using δ18O values, we have calculated the temperatures and the results show that the temperature difference between the penultimate glacial period (with an average temperature of 8.1℃, and a minimum temperature range from 0.65℃ to -1.43℃ at stage 6 ) and the last interglacial period (with an average temperature of 18.24℃ at sub-stage 5e ) was about 10℃. This temperature difference from the record of the stalagmites corresponds in general to the record temperature variation (about 10℃) of measured ice cores. The climate records from the three stalagmites in the two caves have shown that the circulation strength of the Asian summer monsoon and the winter monsoon in the penultimate glacial period and the last interglacial period had a clear change. With the TIMS-U series method, termination II of the penultimate glacial period has been precisely dated at an age of (129.28±1.10) kaBP for the three stalagmites in the south of Guizhou Province, China. This borderline age represents the beginning of the last interglacial period or the boundary between the Middle Pleistocene and the Late Pleistocene, and corresponds to the beginning age of the last interglacial period shown by the ice cores and in the SPECMAP curve of the marine oxygen isotopes. The chronology determination of termination II is not only of stratigraphic and chronological significance, but also lays an important foundation for discussing the short time scales of climate oscillation and rapidly changing events of paleoclimate in the circulation region of the East Asian monsoon. | ZHANG Meiliang, YUAN Daoxian1, LIN Yushi, CHENG Hai, QIN Jiaming &ZHANG HuilingKarst Dynamics Laboratory, Institute of Karst Geology, Chinese Academy of Geological Sciences, Guilin 541004, China Geography Department, Minnesota University, MN 55455, USA Correspondence should be addressed to Zhang Meiliang | 2004 | Science China Earth Sciences2004，47，1： | 9 |
| 3 | Amyloid beta-protein fragment 31- 35 suppresses long-term potentiation in hippocampal CA1 region of rats in vivo 显示文摘 | Zhang JM Wu MN Qi JS | 2006 | Synapse2006，60，4： | 1 |
| 4 | Human T cells that are able to produce IL-17 express the chemokine re-ceptor CCR5 显示文摘 | Singh SP Zhang HH Foley JF Hedrick MN Farber JM | 2008 | J Immunol2008，180，1： | 1 |
| 5 | Possible antidepressant effects and mechanisms of memantine in behaviors and synaptic plasticity of a depression rat model显示文摘 | Quan MN Zhang N Wang YY | | 0，，： | 1 |
| 6 | Disposition and pharmacokinetics of L-N6- (1-iminoeth-yl) lysine-5-tetro- zole-arnide, a selective iNOS inhibitor in rats显示文摘 | Zhang JY Wang YF Milton MN | 2004 | J Pharm Sci2004，93，5： | 1 |
| 7 | Genetic alterations in cer-vical carcinomas:frequent lower level amplifications of onco-genes are associated with human papillomavirus infection显示文摘 | Zhang A Mnér S Betz R | 2002 | Int J Cancer2002，101，5： | 1 |
| 8 | Varicella-Zoster virus-specific immune responses to herpes zoster in elderly participants in a trial of a clinically effective zoster vaccine显示文摘 | Weinberg A Zhang JH Oxman MN | 2009 | J Infect Dis2009，200，7： | 1 |
| 9 | Varicella-zoster virus-specific immune responses to herpes zoster in elderly participants in a trial of a clinically effective zoster vaccine显示文摘 | Weinberg A Zhang JH Oxman MN | 2009 | J Infect Dis2009，200，7： | 1 |
| 10 | Integration of light and abscisic acid signaling during seed germination and early seed- ling development 显示文摘 | Chen H Zhang JY Michael MN | 2008 | PNAS2008，105，： | 1 |
| 11 | Interleu-kin-10 (IL-10) polymorphisms are associated with IL-10 pro-duction and clinical malaria in young children显示文摘 | Zhang G Manaca MN McNamara-Smith M | 2012 | Infect Im-mun2012，80，7： | 1 |
| 12 | Decoding NMDA receptor signaling: identification of genomic programs specifying neuronal survival and death 显示文摘 | Zhang SJ Steijaert MN Lau D | 2007 | Neuron2007，53，： | 1 |
| 13 | Gastric parietal cell anti- bodies,Helicobacter pylori infection,and chronic atrophic gastritis: evidence from a large populatlon-based study in Germany 显示文摘 | Zhang Y Weck MN Schttker B | 2013 | Cancer Epidemiol Biomarkers Prey2013，22，5： | 1 |
| 14 | Molecular epidemiologi- cal survey of haemoglobinopathies in the Guangxi Zhuang Autonomous Region of southern China 显示文摘 | Xiong F Sun MN Zhang XI-I | 2010 | Clinical Genet- ics2010，78，2： | 1 |
| 15 | DeLivery of radiofre- quency energy to the lower oesophageal sphincter and gastric car- dia inhibits transient lower oesophageal sphincter relaxations and gastro-oesophageal reflux in patients with reflux disease 显示文摘 | Tam WC Schoeman MN Zhang Q | 2003 | Gut2003，52，4： | 1 |
| 16 | Varicella-zoster Virusspecific immune responses in elderly recipients of a herpes zostgrvaeeine显示文摘 | Levin MJ Oxman MN Zhang JH | | 0，，06： | 1 |
| 17 | Varicella-zoster virusspecific immune responses in elderly recipients of a herpes zoster vaccine显示文摘 | Levin MJ Oxman MN Zhang JH | 2008 | J Infect Dis2008，197，： | 1 |
| 18 | Sliding contact fatigue of graded zirconia with external esthetic glass 显示文摘 | Ren L Janal MN Zhang Y | 2011 | J Dent Res2011，90，9： | 1 |
| 19 | Amyloid beta-protein fragment 31-35 suppresses long-term potentiation in hippocampal CA1 region of rats in vivo显示文摘 | Zhang JM Wu MN Qi JS | 2006 | Synapse2006，60，4： | 1 |
| 20 | Differential effects of CsA and tacrolimns on the production of TGF β implication for derelopment of obliteractive bronchiolitis after lung transplantation显示文摘 | Zhang JG Wedmsley MN Mon JV | 1998 | Transplant Int1998，11，： | 1 |
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