Stream Geometry Climate has clear effects on streams. Theory and observations both show that channel incision rates increase with precipitation, and chemical erosion rates scale with temperature, but how does the surface geometry of rivers depend on those factors? Seybold et al. analyzed nearly 1 million river junctions across the contiguous United States and found that branching angles vary systematically with climatic aridity. Branching angles are smaller in arid regions than in humid ones, where groundwater seepage is more important, and are stronger functions of aridity than of other commonly invoked controls such as topographic gradient or downstream concavity. These findings may aid in characterizing channelization processes in landscapes where relict streams are found, such as on Mars. Geophys. Res. Lett. 10.1002/2016GL072089 (2017).

中文翻译：

---

溪流的新视角

河流几何 气候对河流有明显的影响。理论和观察都表明，河道切割率随降水而增加，化学侵蚀率随温度成比例，但河流的表面几何形状如何取决于这些因素？赛博德等人。分析了美国本土近 100 万条河流交汇处，发现分支角度随气候干旱而系统地变化。干旱地区的分支角比地下水渗流更为重要的潮湿地区小，并且比其他常见的控制因素（如地形梯度或下游凹度）对干旱的作用更强。这些发现可能有助于表征发现遗迹溪流的景观中的通道化过程，例如在火星上。地球物理学。水库 莱特。10.1002/2016GL072089（2017）。