To evaluate isotopic tracers at natural abundances by providing basic isotope data of the hydrological investigations and assessing the impacts of different factors on the water cycle, a total of 197 water samples wer...To evaluate isotopic tracers at natural abundances by providing basic isotope data of the hydrological investigations and assessing the impacts of different factors on the water cycle, a total of 197 water samples were collected from the Laohugou Glacial catchment in the Shule River basin northwestern China during the 2013 ablation seasons and analyzed their H- and O-isotope composition. The results showed that the isotopic composition of precipitation in the Qilianshan Station in the Laohugou Glacial catchment was remarkable variability. Correspondingly, a higher slope of δ180-δD diagram, with an average of 8.74, is obtained based on the precipitation samples collected on the Glacier No.la, mainly attributed to the lower temperature on the glacier surface. Because of percolation and elution, the bottom of the firn the isotopic composition at is nearly steady. The 6180 /altitude gradients for precipitation and melt water were -o.37%o/100 m and -o.34%o/100 m, respectively Exposed to the air and influenced by strong ablation and evaporation, the isotopic values and the 6180 vs 6D diagram of the glacial surface ice show no altitudinal effect, indicating that glacier ice has the similar origins with the firn. The variation of isotopic composition in the melt water, varying from -l0.7‰ to -16.9‰ （8180） and from -61.1%o to -122.1%o （6D） indicates the recharging of snowmelt and glacial ice melt water produced at different altitudes. With a mean value of -13.3‰ for 8180 and -89.7‰ for 8D, the isotopic composition of the stream water is much closer to the melt water, indicating that stream water is mainly recharged by the ablation water. Our results of the stable isotopic compositions in natural water in the Laohugou Glacial catchment indicate the fractionations and the smoothing fluctuations of the stable isotopes during evaporation, infiltration and mixture.展开更多
豹子——给画家何多苓 Viens-tu du ciel profond ousors-tu de I’ abime, O Beauté? tonregard, infernal et divin。在中国的类书中,很少有提到豹子的。一般是在老虎的辞条后附加一条,以表明这种动物的存在。因为,人们喜欢把老...豹子——给画家何多苓 Viens-tu du ciel profond ousors-tu de I’ abime, O Beauté? tonregard, infernal et divin。在中国的类书中,很少有提到豹子的。一般是在老虎的辞条后附加一条,以表明这种动物的存在。因为,人们喜欢把老虎和豹子看作是同一种动物的变形。汉语最古老的词典《说文》文写道:"豹子就像老虎。"波德莱尔、托·史·艾略特、里尔克、博尔赫斯在他们的作品中,也都认为豹子和老虎有着神学和民俗意义上的通用性。这并非完全是因为人们混淆了两种不同的动物,而是因为他们非常尊重那些隐秘的习俗,尤其是与肉体、灵魂和上帝有关的习俗。一般人不大知道,豹子在中国还有一个很奇怪的名字,叫做"程"。"程"就是程度、克制。展开更多
Stable hydrogen and oxygen isotope has important implication on water and mois- ture transportation tracing research. Based on stable hydrogen （6D） and oxygen （6180） isotope using a Picarro Ll102-i and water chemi...Stable hydrogen and oxygen isotope has important implication on water and mois- ture transportation tracing research. Based on stable hydrogen （6D） and oxygen （6180） isotope using a Picarro Ll102-i and water chemistry （e.g. major ions, pH, EC and TDS） meas- urement, this study discussed the temporal variation and characteristics of stable hydrogen and oxygen isotope, chemistry （e.g. TDS, pH, EC, Ca^2^, Mg2＋, Na^＋ and CI） in various water bodies including glacier meltwater runoff, ice and snow, and precipitation at the Laohugou g^acier basin during June 2012 to September 2013. Results showed that 6D and δ18O in the meltwater runoff varied obviously with the temporal change from June to September, showing firstly increasing trend and then decreasing trend, with the highest values in July with high air temperature and strong glacier melting, which could indicate the temporal change of glacier melting process and extent. Variations of 6D and δ18O in the runoff were similar with that of snow and ice on the glacier, and the values were also above the GMWL, which probably im- plied that the glacier runoff was mainly originated from glacier melting and precipitation supply The glacier meltwater chemical type at the Laohugou glacier basin were mainly composed by Ca-Na-HCO3-SO4 and Ca-Mg-HCO3-SO4, which also varied evidently with the glacier melting process in summer. By analyzing the temporal change of stable hydrogen and oxygen isotope and chemistry in the melting period, we find it is easy to separate the components of the snow and ice, atmospheric precipitation and melt-runoff in the river, which could reflect the change process of glacier melting during the melting period, and thus this work can contribute to the glacier runoff change study of large-scale region by stable isotope and geochemical method in future.展开更多
基金the projects of National Major Scientific Research Project (2013CBA01806)National Natural Science Foundation of China (Grant Nos. 41271085,41130641)open fund project of State Key Laboratory of Cryospheric Science (SKLCS-OP2013-05)
文摘To evaluate isotopic tracers at natural abundances by providing basic isotope data of the hydrological investigations and assessing the impacts of different factors on the water cycle, a total of 197 water samples were collected from the Laohugou Glacial catchment in the Shule River basin northwestern China during the 2013 ablation seasons and analyzed their H- and O-isotope composition. The results showed that the isotopic composition of precipitation in the Qilianshan Station in the Laohugou Glacial catchment was remarkable variability. Correspondingly, a higher slope of δ180-δD diagram, with an average of 8.74, is obtained based on the precipitation samples collected on the Glacier No.la, mainly attributed to the lower temperature on the glacier surface. Because of percolation and elution, the bottom of the firn the isotopic composition at is nearly steady. The 6180 /altitude gradients for precipitation and melt water were -o.37%o/100 m and -o.34%o/100 m, respectively Exposed to the air and influenced by strong ablation and evaporation, the isotopic values and the 6180 vs 6D diagram of the glacial surface ice show no altitudinal effect, indicating that glacier ice has the similar origins with the firn. The variation of isotopic composition in the melt water, varying from -l0.7‰ to -16.9‰ （8180） and from -61.1%o to -122.1%o （6D） indicates the recharging of snowmelt and glacial ice melt water produced at different altitudes. With a mean value of -13.3‰ for 8180 and -89.7‰ for 8D, the isotopic composition of the stream water is much closer to the melt water, indicating that stream water is mainly recharged by the ablation water. Our results of the stable isotopic compositions in natural water in the Laohugou Glacial catchment indicate the fractionations and the smoothing fluctuations of the stable isotopes during evaporation, infiltration and mixture.
文摘豹子——给画家何多苓 Viens-tu du ciel profond ousors-tu de I’ abime, O Beauté? tonregard, infernal et divin。在中国的类书中,很少有提到豹子的。一般是在老虎的辞条后附加一条,以表明这种动物的存在。因为,人们喜欢把老虎和豹子看作是同一种动物的变形。汉语最古老的词典《说文》文写道:"豹子就像老虎。"波德莱尔、托·史·艾略特、里尔克、博尔赫斯在他们的作品中,也都认为豹子和老虎有着神学和民俗意义上的通用性。这并非完全是因为人们混淆了两种不同的动物,而是因为他们非常尊重那些隐秘的习俗,尤其是与肉体、灵魂和上帝有关的习俗。一般人不大知道,豹子在中国还有一个很奇怪的名字,叫做"程"。"程"就是程度、克制。
基金National Natural Science Foundation of China,No.41301065The West Light Program for Talent Cultivation of Chinese Academy of Sciences
文摘Stable hydrogen and oxygen isotope has important implication on water and mois- ture transportation tracing research. Based on stable hydrogen （6D） and oxygen （6180） isotope using a Picarro Ll102-i and water chemistry （e.g. major ions, pH, EC and TDS） meas- urement, this study discussed the temporal variation and characteristics of stable hydrogen and oxygen isotope, chemistry （e.g. TDS, pH, EC, Ca^2^, Mg2＋, Na^＋ and CI） in various water bodies including glacier meltwater runoff, ice and snow, and precipitation at the Laohugou g^acier basin during June 2012 to September 2013. Results showed that 6D and δ18O in the meltwater runoff varied obviously with the temporal change from June to September, showing firstly increasing trend and then decreasing trend, with the highest values in July with high air temperature and strong glacier melting, which could indicate the temporal change of glacier melting process and extent. Variations of 6D and δ18O in the runoff were similar with that of snow and ice on the glacier, and the values were also above the GMWL, which probably im- plied that the glacier runoff was mainly originated from glacier melting and precipitation supply The glacier meltwater chemical type at the Laohugou glacier basin were mainly composed by Ca-Na-HCO3-SO4 and Ca-Mg-HCO3-SO4, which also varied evidently with the glacier melting process in summer. By analyzing the temporal change of stable hydrogen and oxygen isotope and chemistry in the melting period, we find it is easy to separate the components of the snow and ice, atmospheric precipitation and melt-runoff in the river, which could reflect the change process of glacier melting during the melting period, and thus this work can contribute to the glacier runoff change study of large-scale region by stable isotope and geochemical method in future.
