|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Climate variability recorded by n-alkanes of paleolake sediment in Qaidam Basin on the northeast Tibetan Plateau in late MIS3显示文摘Here we combine n-alkanes preserved in a shell bar section from Qarhan paleolake, Qaidam Basin with the other sedimentary proxies to elucidate the lake evolution process during the period 39.7 to 17.5 14C ka BP (calibrated age ranges from 43.5 to 22.4 cal. ka BP). In different stages, the n-alkane homologues exhibited different distribution modes indicative of variations in the surrounding vegetation and the hydrologic condition of the lake. The n-alkanes proxies (CPIh, ACLh, Paq) have the same trends as the summer solar insolation variation, implying that the summer insolation is the most important climatic factor driving the environmental changes and also indirectly controls lake evolution on the Tibetan Plateau. CPIh and ACLh as well as the total pollen concentration appear to show a trend comparable with methane concentration record from the GRIP ice core that reflected the Dansgaard-Oeschger events. This demonstrates that the paleoclimate variations in Qarhan area generally agree with global climate change and show rapid oscillations in late MIS3. These findings provide the latest molecular fossil evidence from paleolake sediments to confirm that lake evolution on Tibetan Plateau in late MIS3 was closely associated with enhanced summer insolation. | PU Yang ZHANG HuCai LEI GuoLiang CHANG FengQin YANG MingSheng ZHANG WenXiang LEI YanBin YANG LunQing PANG YouZhi | 2010 | Science China Earth Sciences2010，53，6： | 8 |
| 2 | Implications for soil environment from uranium isotopes of stalagmites显示文摘By analyzing U and Th isotopic compositions of 41 samples in two stalagmites from Hulu Cave, Nanjing, we first discovered that variations of 238U and δ234U0 along the stalagmite growth-sequence (covering a period from 75 to 18 kaBP) are in high similarity to summer insolation curve at 33°N and δ18O-based climate record of the studied stalagmites. The concentration of 238U is mainly controlled by content of organic matter in the soil above the cave. This mechanism can be used to explain our result that 238U curve of stalagmites is in phase with fluctuation of the δ18O record of the same stalagmites and summer insolation at cave locality. However, 238U concentration curve vs. age is, in amplitude, inconsistent with the climatic curves, possibly due to complex processes of soil-water-rock interaction. δ234U0 indicates pedogenic intensity of soil profile above the cave and sensitively reflects alternations of pedogenesis and aeolian accumulation processes of Xiashu loess in Nanjing. Consequently, | KUANG Runyuan WANG Yongjin ZHANG Xianghua CHENG Hai | 2002 | Chinese Science Bulletin2002，47，19： | 4 |
| 3 | Observation of clouds and solar radiation over the Pacific Ocean as relation to global climate显示文摘ObservationofcloudsandsolarradiationoverthePacificOceanasrelationtoglobalclimate￥FarnParungo;ClarenceNagamoto;CeciliaM.I.R.Gi... | Farn Parungo Clarence Nagamoto Cecilia M. I. R. Girz Jeff Torgerson and Zhou Mingyu (Science and Technology Corporation, Boulder, CO, U. S. A.Air Resources Laboratory, NOAA, Boulder, CO, U. S. A.Forecast Systems Laboratory, NOAA, Boulder, CO, U. S. A.U | 1995 | Acta Oceanologica Sinica1995，14，2： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员