Precipitation Chemistry Data For the Sevilleta National Wildlife Refuge, New Mexico (1989-present)

This data set includes precipitation chemisty from 20 funnel collectors on the Sevilleta National Wildlife Refuge (NWR). Variables measured include volume, NO3-N, NH4-N, SO4, Cl, Na, K, Ca, Mg, and PO4. The sample interval depends on the frequency of significant precipitations events. Field collection of precipitation chemistry samples occurred as soon after a significant precipitation event as possible (usually within a week after the event). In some cases collection of precipitation chemistry samples occurred more often than meteorlogical station samples (summer, fall), and sometimes less often (winter, spring). Precipitation chemistry samples were collected only when there was enough sample to allow for complete chemical analysis, (usually greater than 100mls). After 1995 all samples continued to be collected for volume but only an a partial set of the samples continued to be analyzed for inorganic nutrients.本数据集涵盖塞维莱塔国家野生动物保护区（Sevilleta National Wildlife Refuge, NWR）内20台漏斗式降水收集器采集的降水化学样本。所测定的变量包括样本体积、硝态氮（NO3-N）、铵态氮（NH4-N）、硫酸盐（SO4）、氯化物（Cl）、钠（Na）、钾（K）、钙（Ca）、镁（Mg）以及磷酸盐（PO4）。采样间隔取决于有效降水事件的发生频率。降水化学样本的野外采集工作会在有效降水事件发生后尽快开展，通常不晚于事件发生后一周。在部分时段（如夏季、秋季），降水化学样本的采集频率高于气象站监测样本；而在另一些时段（如冬季、春季）则反之。仅当采集到的样本量足以完成完整化学分析时（通常需大于100毫升），才会收集降水化学样本。1995年之后，所有样本仍会采集其体积数据，但仅对部分样本开展无机营养盐相关分析。