首页> 外文OA文献 >Recording microscale variations in snowpack layering using near-infrared photography
【2h】

Recording microscale variations in snowpack layering using near-infrared photography

机译:使用近红外摄影记录积雪分层中的微小变化

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务,本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文,但由于OA文献来源多样且变更频繁,仍可能出现获取不到、文献不完整或与标题不符等情况,如果获取不到我们将提供退款服务。请知悉。

摘要

Deposition of snow from precipitation and wind events creates layering within seasonal snowpacks. The thickness and horizontal continuity of layers within seasonal snowpacks can be highly variable, due to snow blowing around topography and vegetation, and this has important implications for hydrology, remote sensing and avalanche forecasting. In this paper, we present practical field and post-processing protocols for recording lateral variations in snow stratigraphy using near-infrared (NIR) photography. A Fuji S9100 digital camera, modified to be sensitive to NIR wavelengths, was mounted on a rail system that allowed for rapid imaging of a 10 m long snow trench excavated on the north side of Toolik Lake, Alaska (68°3? N, 149°36? W). Post-processing of the images included removal of lens distortion and vignetting. A tape measure running along the base of the trench provided known locations (control points) that permitted scaling and georeferencing. Snow layer heights estimated from the NIR images compared well with manual stratigraphic measurements made at 0.2 m intervals along the trench (n = 357, R2 = 0.97). Considerably greater stratigraphic detail was captured by the NIR images than in the manually recorded profiles. NIR imaging of snow trenches using the described protocols is an efficient tool for quantifying continuous microscale variations in snow layers and associated properties.
机译:由于降水和风的影响,积雪会在季节性积雪中形成分层。由于地形和植被周围的积雪,季节性积雪中各层的厚度和水平连续性可能会高度变化,这对水文学,遥感和雪崩预报具有重要意义。在本文中,我们介绍了使用近红外(NIR)摄影技术记录雪地层中横向变化的实用现场和后处理协议。将富士S9100数码相机改装为对NIR波长敏感,将其安装在导轨系统上,该导轨系统可对​​位于阿拉斯加Toolik湖北侧开挖的10 m长积雪沟进行快速成像(68°3?N,149 °36?W)。图像的后处理包括消除镜头畸变和渐晕。沿着沟槽底部延伸的卷尺提供了允许缩放和地理配准的已知位置(控制点)。从NIR图像估计的雪层高度与沿沟渠以0.2 m的间隔进行的手动地层测量(n = 357,R2 = 0.97)相比很好。与手动记录的剖面相比,NIR图像捕获的地层细节要多得多。使用所描述的协议对雪沟进行近红外成像是一种有效的工具,可用于量化积雪层和相关属性中连续的微观尺度变化。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

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