Thule Biocomplexity - Gross Ecosystem Photosynthesis

Ecosystem carbon dioxide flux measurements were taken at a High Arctic prostrate dwarf-shrub, herb tundra near Pituffik (Thule), Greenland (76 deg 29'N, 68 deg 26'W; elevation 245 m asl) northwest Greenland. Between 1978 and 2004, mean annual air temperature and precipitation for the site were -11.4 deg C and 12.5 cm respectively. Over the same period, growing season (June, July and August) air temperatures averaged 3.8 deg C and approximately 50% of precipitation fell between October and April as snow. The soil surface of the study site was approximately 40% covered by vascular plants and 60% unvegetated. Dominant vascular plants include the deciduous dwarf-shrub Salix arctica, the graminoid Carex rupestris and the wintergreen dwarf-shrub Dryas integrifolia. The dataset covers the growing seasons of 2006 and 2007.本数据集的生态系统二氧化碳通量观测于格陵兰西北部皮图菲克（图勒）附近的高北极匍匐矮灌木-草本苔原开展，观测点位坐标为北纬76°29′、西经68°26′，海拔245米（以平均海平面为基准）。1978年至2004年间，该观测点的年平均气温为-11.4℃，年平均降水量为12.5厘米。同期，生长季（6、7、8月）的平均气温为3.8℃，约50%的降水量以降雪形式于10月至次年4月降落。研究样地的土壤表层约40%被维管植物覆盖，剩余60%为无植被覆盖区域。优势维管植物包括落叶矮灌木北极柳（Salix arctica）、禾草类植物岩生薹草（Carex rupestris）以及常绿矮灌木全缘叶仙女木（Dryas integrifolia）。本数据集涵盖2006年与2007年的生长季观测数据。