LBA-ECO TG-07 SOIL TRACE GAS FLUXES KM 67 SECA-FLORESTA SITE, TAPAJOS NATIONAL FOREST

Trace gas fluxes of carbon dioxide, methane, nitrous oxide, and nitric oxide (CO2, CH4, N2O, and NO) from surface soil were measured manually in an undisturbed forest at the Tapajos National Forest Seca-Floresta Site, which is within the footprint of the km 67 eddy flux tower. Measurements were made in January 2000 through April 2004, approximately twice per month. On each sampling date, up to four sets of 30-m lines were established off the existing transects at the Seca-Floresta site. Along each line eight chambers were installed for gas collection. In addition soil samples were collected for analysis of soil moisture as water-filled pore space (WFPS). There is one comma-delimited ASCII file with this data set.

本数据集针对塔帕若斯国家森林（Tapajos National Forest）Seca-Floresta样地内一处未受干扰的森林，手动测定了地表土壤排放的二氧化碳（CO₂）、甲烷（CH₄）、一氧化二氮（N₂O）及一氧化氮（NO）等痕量气体通量，该样地位于67 km涡度通量塔（eddy flux tower）的通量足迹区内。观测时段为2000年1月至2004年4月，采样频率约为每月两次。每次采样时，在Seca-Floresta样地现有样带外侧布设最多4组30米长的采样线；每条采样线上安装8个气体采集箱以收集气体样品。此外，同步采集土壤样品，用于分析以土壤充水孔隙度（water-filled pore space, WFPS）表征的土壤湿度。本数据集包含1个逗号分隔格式的ASCII文件。