Biosphere-atmosphere CO2 exchange and its link to sun-induced fluorescence in a mixed forest and a cropland

Site: Lägeren (CH-LAE, canton Aargau, Switzerland) Managed mixed deciduous mountain forest located on the steep Lägeren mountain (NW of Zurich, Swiss Plateau). The forest is highly diverse, dominated by beech and fir. The site is part of the international CarboEurope IP network and the NABEL (Swiss air quality network) and a long-term forest ecosystem research site (LWF) of the WSL (Institut f. Wald Schnee&Landschaft).; Longitude (WGS 84): 8°21'51.8" E; Latitude (WGS 84): 47°28'42.0" N; Altitude (m.a.s.l): 682; Land cover (IGBP land classification): Mixed Forest; Soil type: The main soil types are rendzic leptosols (or rendzinas) and haplic cambisols according to the World Reference Base of Soil Resources (IUSS Working Group WRB, 2007). The litter layer is thin, since leaf litter decomposes almost completely within one year.; Geology: The main bedrocks of the study site are limestone, marl and sandstone, with transition zones between marl and limestone (loamy debris) and marl mixed with sandstone (loam).

观测点：莱格伦山（CH-LAE，瑞士阿尔高州），该站点为坐落于苏黎世西北侧瑞士高原陡峭莱格伦山的管理型混合落叶山地森林。该森林物种多样性极高，以山毛榉与冷杉为优势树种。本观测点隶属于国际CarboEurope IP网络与NABEL（瑞士空气质量监测网络），同时也是瑞士森林、积雪与景观研究所（WSL，Institut f. Wald Schnee&Landschaft）下属的长期森林生态系统研究站点（LWF）。
坐标（WGS 84坐标系）：经度8°21′51.8″E，纬度47°28′42.0″N；海拔（米，平均海平面以上）：682。
土地覆盖（IGBP土地分类，IGBP land classification）：混合森林。
土壤类型：依据世界土壤资源参比基础（World Reference Base of Soil Resources，IUSS工作组WRB，2007），本区域主要土壤类型为石灰性薄层土（rendzic leptosols，又称rendzinas）与简育雏形土（haplic cambisols）。由于地表凋落物可在一年内几乎完全分解，因此枯落物层较薄。
地质：研究区域的主要基岩为石灰岩、泥灰岩与砂岩，其中泥灰岩与石灰岩之间存在过渡带（壤质碎屑），泥灰岩与砂岩混合地带的土壤为壤土。