Santa Catalina Mountains - Marshall Gulch Soil Solution Chemistry 2009-2010 (Arizona, USA)

In the Marshall Gulch of the Catalina-Jemez Critical Zone Observatory (CZO) there are installed 8 Soil Moisture 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. Soil Moisture suction cups (SoilMoisture Equipment Corp., Santa Barbara, CA) are sampled with a suction of 70-80kpa and optimized for all chemistry analyses with the exception of dissolved organic matter in the case of the Soil Moisture ones (due to potential sorption of DOM on the porous ceramic material).

在卡特琳娜-赫梅斯关键带观测站（Catalina-Jemez Critical Zone Observatory, CZO）的马歇尔峡谷内，研究人员在片岩样地的汇流型与发散型两类地貌位置内布设了8个土壤水分吸力杯（Soil Moisture suction cups），在花岗岩样地的同类地貌位置内则布设了7个同类型设备。此类土壤溶液采样器与用于测定土壤剖面内地下水位深度的渗压计（piezometers）同址布设。本次使用的土壤水分吸力杯产自加利福尼亚州圣巴巴拉市的Soil Moisture Equipment Corporation，采样时施加70~80千帕的负压，可适配除溶解性有机质（dissolved organic matter, DOM）之外的全部化学分析需求；这一限制源于多孔陶瓷材料可能会吸附溶解性有机质。