Isotope mapping on mountainous regions: current state and way forward
Isotope mapping on mountainous regions: current state and way forward
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DOI：
10.4145/jahs.46.73
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发表时间：
2016
影响因子：
1.5
通讯作者：
T. Yamanaka;Keisuke Suzuki;Y. Wakiyama;Kazuhiro Kishi;Y. Makino;K. Maruyama;M. Kano;Wenchao Ma;Daisuke Masaki;M. Sugiyama;Y. Yamakawa;S. Yoshitake
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文献类型：
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作者：
T. Yamanaka;Keisuke Suzuki;Y. Wakiyama;Kazuhiro Kishi;Y. Makino;K. Maruyama;M. Kano;Wenchao Ma;Daisuke Masaki;M. Sugiyama;Y. Yamakawa;S. Yoshitake
以山区为重点，综述了降水等压线研究的进展及其基础和应用。最近的一项研究表明，日本阿尔卑斯山地区的降水等值线可以通过一个相对简单的模式，考虑海拔和内陆的影响。然而，稳定状态等密度的精确建模需要同位素监测超过几年，以减少与逐年变化相关的误差。由于过分强调雪/冰数据以及高度和内陆效应的重叠，同位素直减率的公布值可能被高估。到目前为止，山区的降水同位素图已用于以下目的：地下水和泉水补给高程的面积估计，水文线分离的比例扩大，大流域的过境时间估计和径流/地下水模型的改进，以及流域尺度的蒸散分区。这些进展在监测高山环境变化和为流域管理提供科学依据方面具有重要意义。在绘制具有更精细时间分辨率的地图以及应用于生态学、人类学和法医学研究方面的创新以及更长时间尺度的持续监测将是重要的。
Advances in precipitation isoscape studies and its basis/application were reviewed with a focus on mountainous regions. A recent study showed that precipitation isoscapes over Japanese Alps region can be mapped by a relatively simple model considering altitude and inland effects. However, accurate modelling of a steady state isoscape requires isotope monitoring longer than a few years to reduce errors associated with year-to-year variations. Published values of isotopic lapse rates are likely to be overestimated because of too much emphasis of snow/ice data and an overlapping of altitude and inland effects. Precipitation isotope maps for mountainous regions have been applied for the following purposes so far: areal estimation of recharge elevation for groundwater and spring, scaling up of hydrograph separation, improvements of transit time estimation and runoff/groundwater models for large basins, and basin-scale evapotranspiration partitioning. These advances are promising especially in detecting changes in alpine environment and in providing scientific basis for river basin managements. Innovations in mapping with finer temporal resolutions and in applying to ecological, anthropological, and forensic studies will be important as well as continuous monitoring for longer time scales.