CJCZO -- Soil Water Chemistry -- Santa Catalina Mountains -- (2006-2019)

Soil solution samples in the SCM field sites are collected with three types of soil solution samples: i) Prenart Super Quartz suction cups (www.prenart.dk) and ii) SoilMoisture suction cups (SoilMoisture Equipment Corp., Santa Barbara, CA) and iii) custom made zero-tension sampler (Hinckley et al., 2008). 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 ~ 50kPa and SoilMoisture suction cups are sampled with a suction of 70-80kpa. Both suction cup types are optimized for all chemistry analyses with the exception of dissolved organic matter in the case of the SoilMoisture ones (due to potential sorption of DOM on the porous ceramic material). Zero-tension samplers are optimized for water flux determination at saturated flow and sampling for various chemistry analyses. In Marshall Gulch there are 8 SoilMoisture suction cups in the schist site and 7 in the granite site in both convergent and divergent landscape positions. These soil solution samplers are co-located with piezometers measuring water table depth within the soil profile. In the Oracle Ridge site there are 8 pits each equipped with 2 Prenarts and 1 SoilMoisture ceramic cup lysimeter. These samplers are co-located with Decagon Em5b data loggers with EC-5 soil moisture sensors and ECT soil temperature sensors. The B2 Desert site Schist and a Granite sites are both equipped with 7 zero-tension samplers (Hinckley et al., 2008) in both divergent and convergent landscape positions as well one SoilMoisture ceramic cup lysimeter. These samplers are co-located with Decagon Em5b data loggers with EC-5 soil moisture sensors and ECT soil temperature sensors.SCM野外站点的土壤溶液样品采用三类采集装置采集：i) Prenart Super Quartz负压采样杯（suction cups，官网：www.prenart.dk）；ii) SoilMoisture负压采样杯（SoilMoisture Equipment Corp.，加利福尼亚州圣巴巴拉市）；iii) 定制零张力采样器（zero-tension sampler，Hinckley等，2008）。 Prenart负压采样杯针对全化学分析优化，安装过程中未添加硅浆，以实现无人工干扰的硅元素分析。每台Prenart采样杯的施加负压约为50kPa，SoilMoisture负压采样杯则采用70~80kPa的负压进行采样。两类负压采样杯均适配全化学分析，仅SoilMoisture负压采样杯例外：由于溶解性有机质（dissolved organic matter, DOM）可能在多孔陶瓷材料表面发生吸附，该类采样杯不适用于溶解性有机质相关分析。 零张力采样器则针对饱和流条件下的水通量测定及多类化学分析采样优化。 在Marshall Gulch站点的片岩样地与花岗岩样地的汇流与分流景观位置中，分别布设8个与7个SoilMoisture负压采样杯。此类土壤溶液采样器与监测土壤剖面内地下水位的测压管（piezometer）同步布设。 Oracle Ridge站点共设置8个采样坑，每个坑均配备2个Prenart负压采样杯与1个SoilMoisture陶瓷杯式渗漏计（lysimeter）。该站点的采样器与搭载EC-5土壤湿度传感器及ECT土壤温度传感器的Decagon Em5b数据记录仪同步布设。 B2荒漠样地的片岩与花岗岩样地，在汇流与分流两种景观位置均布设7台定制零张力采样器（Hinckley等，2008），同时各配备1台SoilMoisture陶瓷杯式渗漏计。此类采样器同样与搭载EC-5土壤湿度传感器及ECT土壤温度传感器的Decagon Em5b数据记录仪同步布设。