Gap-filled daily precipitation at the 15 long-term NPP sites at Jornada Basin LTER, 1980-ongoing

This package contains gap-filled daily precipitation values for the
15 NPP sites at Jornada Basin LTER in southern New Mexico, USA.
Sites were selected to represent the 5 major ecosystem types in the
Chihuahuan Desert (upland grasslands, playa grasslands,
mesquite-dominated shrublands, creosotebush-dominated shrublands,
tarbush-dominated shrublands). For each ecosystem type, three sites
were selected to represent the range in variability in production
and plant diversity; thus the locations are not replicates.
Gap-filled daily precipitation was calculated for the period from
1980 to 2020 at each site using the closest rain gauges that
provided a minimum resolution of daily precipitation data. The
Methods section and attached documents describe this process in
detail. The rain gauges used are described, with respect to their
relationship to NPP sites, in the attached
"daily_gapfill_ppt_gauge_usage.csv" file. Although
automated weather stations became operational at all NPP sites in
2013 (except P-SMAL, in 2017), updates to this data package are
ongoing and are intended to gap-fill any missing or invalid data
from the weather stations.

本数据包包含美国新墨西哥州南部霍拉迪盆地长期生态研究站（Jornada Basin LTER）下辖15个净初级生产力（Net Primary Production, NPP）样地的间隙填补后日降水量数据。
这些样地的选取旨在代表奇瓦瓦沙漠的5种主要生态系统类型：高地草原、干盐湖草原、牧豆树主导灌丛、石炭酸灌木主导灌丛以及盐柴主导灌丛。针对每种生态系统类型，研究人员选取3个样地以覆盖生产力与植物多样性的变异范围，因此这些样地并非重复样地。
研究团队利用分辨率不低于日尺度的邻近雨量站数据，对1980年至2020年期间各站点的日降水量数据完成了间隙填补处理。相关方法说明与附属文件详细阐述了该流程的具体细节。本次研究所用雨量站及其与NPP样地的对应关系，已记录于附属文件"daily_gapfill_ppt_gauge_usage.csv"中。
尽管所有NPP样地的自动气象站已于2013年投入运行（P-SMAL样地除外，其于2017年启用），本数据包仍在持续更新，旨在填补气象站数据中的缺失或无效值。