*2.2. Eddy Covariance and Meteorological Measurements*

A 62 m high meteorological tower is located at the study site. Temperature and relative humidity probes (HMP155A, Vaisala, Helsinki, Finland) and anemometers (WindSonic1, Campbell Scientific, Logan, UT, USA) were installed at seven heights (2.5, 8, 22, 26, 32, 50, and 60 m) on the tower. A pyranometer (CMP22, Kipp&Zonen, Delft, Netherlands) was installed at 40 m on the tower. Rainfall was measured at 62 m using a rain gauge (TE525MM, Texas Electronics, Dallas, TX, USA). Soil temperature and moisture were measured at a 5 cm depth using a thermocouple burial probe (105E-L, Campbell Scientific, Logan, UT, USA) and a water content reflectometer (CS616, Campbell Scientific, Logan, UT, USA), respectively. All of the meteorological data were recorded via a CR1000X data logger (Campbell Scientific, Logan, UT, USA) at 30 min intervals.

An eddy covariance system was installed on the tower at 40 m above the ground. The system consisted of a three-axis anemometer (WindMaster Pro, Gill Instruments, Lymington, UK) and an open-path CO2/H2O infrared gas analyzer (Li-7500DS, LI-COR, Lincoln, NE, USA). Raw data were collected by a SmartFlux 3 System (LI-COR, Lincoln, NE, USA).
