Methane and carbon dioxide fluxes from vegetated and open water zones of lakes in the Peace-Athabasca Delta, Alberta, Canada, 2019

Shallow areas of lakes, known as littoral zones, emit disproportionately more methane than open water but are sometimes ignored in upscaled estimates of lake greenhouse gas emissions. Littoral zone coverage may be estimated through synthetic aperture radar (SAR) mapping of emergent aquatic vegetation, which only grows in water less than ~1.5 m deep. In an accompanying publication, we combine airborne SAR mapping with field measurements of littoral and open-water methane flux to assess the importance of littoral zones to landscape-scale methane emissions. This dataset contains the field measurements of chamber methane flux from vegetated littoral zones and open water used for the accompanying publication. Measurements come from 24 distinct sampling events of 15 lakes in the Peace-Athabasca Delta, Alberta, Canada in July through August, 2019. The dataset also includes within-lake locations, carbon dioxide measurements, simple characterizations of vegetation type, and associated limnological and meteorological measurements, when available: water and air temperature, water depth, wind speed and direction, and relative humidity.

湖泊浅水区即沿岸带（littoral zone）的甲烷排放量显著高于开阔水域，但在湖泊温室气体排放的尺度上推估算中，该区域常被忽视。可通过对仅生长于水深约1.5米以内水域的挺水水生植被开展合成孔径雷达（synthetic aperture radar，SAR）测绘，来估算沿岸带的覆盖范围。在本数据集配套的已发表论文中，研究团队将机载合成孔径雷达测绘与沿岸带及开阔水域的甲烷通量野外实测数据相结合，以评估沿岸带对景观尺度甲烷排放的贡献重要性。本数据集包含配套论文中所用的、来自植被覆盖沿岸带与开阔水域的箱式法甲烷通量野外实测数据。这些实测数据采集于2019年7月至8月，涵盖加拿大阿尔伯塔省皮斯-阿萨巴斯卡三角洲（Peace-Athabasca Delta）的15个湖泊，共计24次独立采样事件。数据集还包含采样点的湖内位置、二氧化碳浓度实测数据、植被类型的简单表征，以及若有可用的湖沼学与气象学相关实测数据：包括水温与气温、水深、风速与风向，以及相对湿度。