Lu Yudong, Gu Jinyan, Sun Jianzhong, Ma Yuan, Han Mingchao, Li Yan, L. Hongjuan
{"title":"洛川黄土高原古植被变化的同位素和花粉证据","authors":"Lu Yudong, Gu Jinyan, Sun Jianzhong, Ma Yuan, Han Mingchao, Li Yan, L. Hongjuan","doi":"10.1109/ISWREP.2011.5893428","DOIUrl":null,"url":null,"abstract":"Carbon isotopes in loess through S<sub>0</sub> to S<sub>11</sub> at Luochuan section in Shanxi province, China were studied. The curve of δ<sup>13</sup>C compares well to that of the oxygen isotope in deep sea sediments from Deep Sea Drilling Project Site 607 drill hole. There is a negative peak of δ<sup>13</sup>C within S<sub>5</sub> paleosol where the content of δ<sup>13</sup>C is -16.615<sup>0</sup>/<sub>00</sub>, shows that the climatic of that period is optimum, and the vegetation is likely forest. Compared with the pollen analysis, we conclude that the vegetation type of palesol S<sub>0</sub>,S<sub>1</sub>,S<sub>4</sub>,S<sub>8</sub>,S<sub>9</sub>, whose δ<sup>13</sup>C content is -5.85--10.00<sup>0</sup>/<sub>00</sub>, is forest-grass. The d13C content of paleosol S<sub>2</sub>, S<sub>3</sub>, S<sub>6</sub>, S<sub>7</sub> is -8.72~-6.95<sup>0</sup>/<sub>00</sub>, and their vegetation is grass. The loess layer L<sub>1</sub>, L<sub>2</sub>, L<sub>5</sub>, L<sub>6</sub>, L<sub>8</sub>, L<sub>9</sub> represent the severe cold-dry glacial period with the δ<sup>13</sup>C content of -3.7- -2.27<sup>0</sup>/<sub>00</sub>, and their vegetation belongs to steppe-desert. The research of paleo-vegetation type is significant to anti-soil erosion in the loess plateau of China.","PeriodicalId":6425,"journal":{"name":"2011 International Symposium on Water Resource and Environmental Protection","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2011-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Isotopic and pollen evidence of paleo-vegetation changes in loess plateau of Luochuan, China\",\"authors\":\"Lu Yudong, Gu Jinyan, Sun Jianzhong, Ma Yuan, Han Mingchao, Li Yan, L. Hongjuan\",\"doi\":\"10.1109/ISWREP.2011.5893428\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Carbon isotopes in loess through S<sub>0</sub> to S<sub>11</sub> at Luochuan section in Shanxi province, China were studied. The curve of δ<sup>13</sup>C compares well to that of the oxygen isotope in deep sea sediments from Deep Sea Drilling Project Site 607 drill hole. There is a negative peak of δ<sup>13</sup>C within S<sub>5</sub> paleosol where the content of δ<sup>13</sup>C is -16.615<sup>0</sup>/<sub>00</sub>, shows that the climatic of that period is optimum, and the vegetation is likely forest. Compared with the pollen analysis, we conclude that the vegetation type of palesol S<sub>0</sub>,S<sub>1</sub>,S<sub>4</sub>,S<sub>8</sub>,S<sub>9</sub>, whose δ<sup>13</sup>C content is -5.85--10.00<sup>0</sup>/<sub>00</sub>, is forest-grass. The d13C content of paleosol S<sub>2</sub>, S<sub>3</sub>, S<sub>6</sub>, S<sub>7</sub> is -8.72~-6.95<sup>0</sup>/<sub>00</sub>, and their vegetation is grass. The loess layer L<sub>1</sub>, L<sub>2</sub>, L<sub>5</sub>, L<sub>6</sub>, L<sub>8</sub>, L<sub>9</sub> represent the severe cold-dry glacial period with the δ<sup>13</sup>C content of -3.7- -2.27<sup>0</sup>/<sub>00</sub>, and their vegetation belongs to steppe-desert. The research of paleo-vegetation type is significant to anti-soil erosion in the loess plateau of China.\",\"PeriodicalId\":6425,\"journal\":{\"name\":\"2011 International Symposium on Water Resource and Environmental Protection\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2011-05-20\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"2011 International Symposium on Water Resource and Environmental Protection\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/ISWREP.2011.5893428\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"2011 International Symposium on Water Resource and Environmental Protection","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ISWREP.2011.5893428","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Isotopic and pollen evidence of paleo-vegetation changes in loess plateau of Luochuan, China
Carbon isotopes in loess through S0 to S11 at Luochuan section in Shanxi province, China were studied. The curve of δ13C compares well to that of the oxygen isotope in deep sea sediments from Deep Sea Drilling Project Site 607 drill hole. There is a negative peak of δ13C within S5 paleosol where the content of δ13C is -16.6150/00, shows that the climatic of that period is optimum, and the vegetation is likely forest. Compared with the pollen analysis, we conclude that the vegetation type of palesol S0,S1,S4,S8,S9, whose δ13C content is -5.85--10.000/00, is forest-grass. The d13C content of paleosol S2, S3, S6, S7 is -8.72~-6.950/00, and their vegetation is grass. The loess layer L1, L2, L5, L6, L8, L9 represent the severe cold-dry glacial period with the δ13C content of -3.7- -2.270/00, and their vegetation belongs to steppe-desert. The research of paleo-vegetation type is significant to anti-soil erosion in the loess plateau of China.