Theδ18O of ice core enclosed gaseous oxygen(δ18Obub)has been widely used for climate reconstruction in polar regions.Yet,less is known about its climatic implication in the mountainous glaciers as the lack of contin...Theδ18O of ice core enclosed gaseous oxygen(δ18Obub)has been widely used for climate reconstruction in polar regions.Yet,less is known about its climatic implication in the mountainous glaciers as the lack of continuous record.Here,we present a long-term,continuousδ18Obub record from the Tanggula glacier in the central Tibetan Plateau(TP).Based on comparisons of its variation with regional climate and glacier changes,we found that there was a good correlation between the variation of theδ18Obub in this alpine ice core and the accumulation and melting of this glacier.The more developed the firn layer on glacier surface,the more positive theδ18Obub.Conversely,the more intense the glacier melting,the more negative theδ18Obub.Combined with the chronology of ice core enclosed gases,the glacier variations since the late Holocene in the central TP were reconstructed.The result showed that there were four accumulation and three deficit periods of glaciers in this region.The strongest glacier accumulation period was 1610-300 B.C.,which corresponds to the Neoglaciation.The most significant melting period was the last 100 years,which corresponds to the recent global warming.The Medieval Warm Period was relatively significant in the central TP.However,during the Little Ice Age,there was no significant glacier accumulation in the central TP,and even short deficit events occurred.Comparisons of the late Holocene glacier variation in the central TP with glacier and climate variations in the TP and the Northern Hemisphere showed that it was closely related to the North Atlantic Oscillation.展开更多
【目的】对比高原地区与平原地区健康体检人群空腹血糖水平差异,以进一步探讨血糖的影响因素。【方法】回顾性从我院2014年至2017年健康体检数据中,随机选取389例青海果洛藏族自治州与548例上海金山区健康体检人群作为研究对象,采集研...【目的】对比高原地区与平原地区健康体检人群空腹血糖水平差异,以进一步探讨血糖的影响因素。【方法】回顾性从我院2014年至2017年健康体检数据中,随机选取389例青海果洛藏族自治州与548例上海金山区健康体检人群作为研究对象,采集研究对象的性别、年龄、民族、空腹血糖、腰围、体质指数、空腹胰岛素等相关数据进行对比分析,运用Logistic回归分析空腹血糖升高的相关因素。【结果】与平原地区比较,高原地区空腹血糖明显偏低,而腰围(85.25 vs 89.98)、BMI(25.48 vs 26.98)、空腹胰岛素水平(51.72 vs 62.82)、血尿酸明显偏高(344.75 vs 403.48)。回归分析筛选出四个相关因素:高原、年龄、腰围、空腹胰岛素。【结论】高海拔地区人群较平原地区空腹血糖明显偏低。高原、年龄、腰围、空腹胰岛素水平均是空腹血糖影响因素。体质指数与空腹血糖升高无明显相关性。展开更多
基金supported by the National Natural Science Foundation of China(Grant No.42271312,41201058)the Strategic Priority Research Program of Chinese Academy of Sciences(Grant No.XDA20070102)+1 种基金the National Key R&D Program of China(Grant No.2018YFB1307504)the Science and Technology Program of Tibet Autonomous Region of China(Grant No.XZ202101ZD0014G).
文摘Theδ18O of ice core enclosed gaseous oxygen(δ18Obub)has been widely used for climate reconstruction in polar regions.Yet,less is known about its climatic implication in the mountainous glaciers as the lack of continuous record.Here,we present a long-term,continuousδ18Obub record from the Tanggula glacier in the central Tibetan Plateau(TP).Based on comparisons of its variation with regional climate and glacier changes,we found that there was a good correlation between the variation of theδ18Obub in this alpine ice core and the accumulation and melting of this glacier.The more developed the firn layer on glacier surface,the more positive theδ18Obub.Conversely,the more intense the glacier melting,the more negative theδ18Obub.Combined with the chronology of ice core enclosed gases,the glacier variations since the late Holocene in the central TP were reconstructed.The result showed that there were four accumulation and three deficit periods of glaciers in this region.The strongest glacier accumulation period was 1610-300 B.C.,which corresponds to the Neoglaciation.The most significant melting period was the last 100 years,which corresponds to the recent global warming.The Medieval Warm Period was relatively significant in the central TP.However,during the Little Ice Age,there was no significant glacier accumulation in the central TP,and even short deficit events occurred.Comparisons of the late Holocene glacier variation in the central TP with glacier and climate variations in the TP and the Northern Hemisphere showed that it was closely related to the North Atlantic Oscillation.
文摘【目的】对比高原地区与平原地区健康体检人群空腹血糖水平差异,以进一步探讨血糖的影响因素。【方法】回顾性从我院2014年至2017年健康体检数据中,随机选取389例青海果洛藏族自治州与548例上海金山区健康体检人群作为研究对象,采集研究对象的性别、年龄、民族、空腹血糖、腰围、体质指数、空腹胰岛素等相关数据进行对比分析,运用Logistic回归分析空腹血糖升高的相关因素。【结果】与平原地区比较,高原地区空腹血糖明显偏低,而腰围(85.25 vs 89.98)、BMI(25.48 vs 26.98)、空腹胰岛素水平(51.72 vs 62.82)、血尿酸明显偏高(344.75 vs 403.48)。回归分析筛选出四个相关因素:高原、年龄、腰围、空腹胰岛素。【结论】高海拔地区人群较平原地区空腹血糖明显偏低。高原、年龄、腰围、空腹胰岛素水平均是空腹血糖影响因素。体质指数与空腹血糖升高无明显相关性。
