CARVE: L1 In-situ Carbon and CH4 Flux and Meteorology at EC Towers, Alaska, 2011-2015

This data set provides ground in situ flux and meteorological science data from fixed instruments at three eddy covariance tower sites located in the Alaskan Arctic tundra. Real and gap-filled observations of carbon dioxide, methane, water vapor, and latent energy flux in addition to standard meteorological and environmental variables are reported at half-hourly intervals between 2011 and 2015 for sites at Atqasuk, Barrow, and Ivotuk, Alaska. The three sites form a 300-km north-south transect on the North Slope of Alaska, each site representing distinct Arctic vegetation communities. These tower measurements create a long-term record of one of the largest, most volatile carbon stocks on the planet. Observations from these towers are being used to determine the seasonal and inter-annual patterns of CO2 and CH4 flux, and their relationship to changes in environmental factors.

本数据集提供了阿拉斯加北极苔原地区3处涡度协方差塔（eddy covariance tower）站点的固定仪器原位通量与气象科学观测数据。针对阿拉斯加Atqasuk、Barrow及Ivotuk三处站点，本数据集记录了2011至2015年间以半小时为间隔的二氧化碳、甲烷、水汽及潜热通量的实测与间隙插补观测数据，同时涵盖标准气象与环境变量。该三处站点沿阿拉斯加北坡形成一条300公里的南北样带，每处站点分别代表独特的北极植被群落。这些塔基观测数据构建了全球规模最大、变化最剧烈的碳库之一的长期观测序列。本数据集的塔基观测结果可用于解析二氧化碳与甲烷通量的季节及年际变化模式，及其与环境因子变化之间的关联。