• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Zeitschrift fur Geomorphologie >Solution dynamics at the rock/snow interface during the ablation period in the subnival karst of the Wetterstein Mountains(Northern Calcareous Alps, Germany)
【24h】

Solution dynamics at the rock/snow interface during the ablation period in the subnival karst of the Wetterstein Mountains(Northern Calcareous Alps, Germany)

机译：Wetterstein山下岩溶岩溶消融期岩石/雪界面处的固溶动力学（德国北钙质阿尔卑斯山）

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Summary. This study focuses on limestone solution under snow (mean maximum depth 450 cm) in the alpine tundra, subnival zone (2,350 to 2,600 m) of the Wetterstein Mountains(47° 24 °N; 11° 7' E). The analysis of melt water discharge from two lysimeters (bare and debris-filled) at the rock/snow interface concentrates on carbon dioxide, which defines water acidity. Diurnal records reveal low values of CO_2 and the synchronization of these amounts with runoff until the stored CO_2 is depleted. Hourly data indicate that cold interface waters have only one quarter of the dissolution capacity of fresh superficial snow (mean 4.5 mg· l~(–1) CO_2). Mostly homothermal cold conditions at the base justify the supply of atmospheric CO_2 via water percolation downwards from the top. Gas detector measurements, showing a decrease of CO_2 with depth caused by increasing snow density, illuminate the control of snow properties on CO_2 diffusion. Minimum amounts (0.005 vol.-%) at 300 cm depth, quadrupling near the surface, indicate an insufficient supply of CO_2, causing low mean dissolution rates of debris. This almost closed system changes in July, with a strong reduction in snow cover. At that time, higher CO_2 values demonstrate enhanced atmospheric interaction, accelerating solution until a maximum value of 28 mg· l~(–1) CaCO_3. Seasonal solution intensity due to CO_2~- triggered water acidity interacting with high melt water budgets explains the subnival karst.
机译：概要。这项研究的重点是在Wetterstein山脉（47°24°N; 11°7'E）的亚寒带（2,350至2,600 m）的高山苔原上的雪（平均最大深度450 cm）下的石灰石溶液中。在岩石/雪地界面的两个测渗仪（裸露的和充满碎屑的）的融化水排放量分析集中在二氧化碳上，二氧化碳确定了水的酸度。白天的记录揭示了低的CO_2值以及这些量与径流的同步，直到存储的CO_2耗尽为止。每小时的数据表明，冷界面水仅占新鲜表层雪的溶解能力的四分之一（平均4.5 mg·l〜（–1）CO_2）。底部的等温低温条件通常证明了通过从顶部向下渗水的方式向大气提供了CO_2。气体探测器的测量结果表明，由于雪密度的增加，CO_2随深度的降低而减小，这说明了雪性质对CO_2扩散的控制。在300 cm深度处的最小量（0.005 vol .-％），在表面附近翻了两番，表明CO_2的供应不足，导致碎片的平均溶解率低。几乎封闭的系统在7月发生了变化，积雪量大大减少。那时，较高的CO_2值表明增强了大气相互作用，加速了溶液的溶解，直到最大值达到28 mg·l〜（–1）CaCO_3。由于CO_2〜-引起的水的酸度与高的融水预算相互作用而产生的季节性溶液强度解释了下岩溶。

著录项

相似文献

  • 外文文献
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号