CJCZO -- Soil Water Chemistry -- Jemez River Basin -- (2011-2019)

Soil solution samples in the JRB field sites are collected with two types of soil solution samples: i) Prenart Super Quartz suction cups (www.prenart.dk). Prenart suction cups are optimized for all chemistry analyses and were installed without addition of Si-slurry to allow for artifact-free Si analyses. Applied suction for each Prenart is ~ 60kPa. ii) Custom made, fiberglass wick-based passive capillary wick samplers (PCaps, Perdrial et al. 2012). PCaps are optimized for water flux determination and sampling for organic carbon, most anions and metals. PCap samples should however not be used for major cations (Na, Mg, Si, K, Ca) and dissolved inorganic carbon because of artifacts from the fiberglass materials (see Perdrial et al in prep. For a complete list). Passive suction, based on the length of the hanging water column, is ~3 kPa. Soil solution samplers were installed in each of six pits in the Mixed Conifer Zero Order Basin (MC-ZOB) and the fire impacted site (burn ZOB) at 3 (PCaps) and 4 (Prenarts) depth, respectively. Pit locations were selected to capture differences in catchment aspect (MC-ZOB SE facing: Pit 3 and 4, NW facing: Pit 1 and 6), landscape position (MC-ZOB: hollow Pit 2 and 5, planar Pit 1 and 6, divergent Pit 3, convergent Pit 4), elevation and burn severity (co-varying in Burn ZOB: low Pit 1 and 2, mid Pit 3, high Pit 4 to 6). All samplers are collocated with Decagon soil moisture and temperature probes.

在JRB现场地点，土壤溶液样本的采集采用了两种类型的土壤溶液样本：i) Prenart超石英吸盘（www.prenart.dk）。Prenart吸盘针对所有化学分析进行了优化，安装时未添加Si污泥，以实现无瑕疵的Si分析。每个Prenart的施加吸力约为60kPa。ii) 定制制作的、以玻璃纤维毛吸为基础的被动毛细管吸样器（PCaps，Perdrial等人，2012年）。PCaps针对水通量和有机碳、大多数阴离子及金属的采样进行了优化。然而，由于玻璃纤维材料导致的误差，PCap样本不适用于主要阳离子（Na、Mg、Si、K、Ca）及溶解无机碳的采样（详见Perdrial等人正在准备中的文献。完整列表请见附文）。基于悬挂水柱长度的被动吸力约为3kPa。土壤溶液采样器分别安装在混合针叶零级流域（MC-ZOB）和火灾影响地点（燃烧ZOB）的六个坑中，分别在3米（PCaps）和4米（Prenarts）的深度。坑位的选择旨在捕捉流域方位的差异（MC-ZOB东南向：坑3和4，西北向：坑1和6）、景观位置（MC-ZOB：坑2和5为凹坑，坑1和6为平面坑，坑3为发散坑，坑4为汇聚坑）、海拔和燃烧严重程度（在燃烧ZOB中与燃烧严重程度呈协变关系：低海拔坑1和2，中海拔坑3，高海拔坑4至6）。所有采样器均与Decagon土壤水分和温度探头并置。