AmeriFlux FLUXNET-1F US-SRS Santa Rita Savanna

This is the AmeriFlux Management Project (AMP) created FLUXNET-1F version of the carbon flux data for the site US-SRS Santa Rita Savanna. This is the FLUXNET version of the carbon flux data for the site US-SRS Santa Rita Savanna produced by applying the standard ONEFlux (1F) software. Site Description - The study site is located in the Santa Rita Experimental Range, approximately 45 km south of Tucson, Arizona, within the Sonoran Desert. The rangeland has undergone a shift from a semiarid grassland to a savanna due to the encroachment of the woody leguminous tree Prosopis velutina Woot., or velvet mesquite. A pair of adjacent watersheds of similar size ( 1.08 ha and 1.10 ha) was established to investigate the effects of mesquite removal on hydrologic processes. In 1974, diesel oil was applied basally to all trees in one watershed, with reapplication as needed and dead tree removal for wood, whereas the other watershed, where the flux tower is located, has continued in the woody plant encroachment process. In 2016, an herbicide process was applied to the area around the EC flux tower.

本数据集为AmeriFlux管理项目（AmeriFlux Management Project, AMP）针对US-SRS圣丽塔稀树草原站点所创建的FLUXNET-1F版本碳通量数据，该数据系通过标准ONEFlux（1F）软件处理生成的FLUXNET系列碳通量数据。

站点概况：研究站点位于亚利桑那州图森以南约45公里的索诺兰沙漠境内的圣丽塔实验牧场。该牧场因豆科木本植物毛叶牧豆树（*Prosopis velutina Woot.*，俗称绒荚牧豆树（velvet mesquite））的入侵，已由半干旱草原演变为稀树草原。研究团队设置了一对面积相近的相邻流域（分别为1.08公顷与1.10公顷），以探究牧豆树移除对水文过程的影响。1974年，研究人员向其中一个流域内的所有树木基部施用柴油，并根据需要重复施药，同时移除枯死树木以获取木材；而通量塔所在的另一流域则持续发生木本植物入侵过程。2016年，研究人员对涡度协方差（EC）通量塔周边区域实施了除草剂处理。