Surface Layer Turbulent Characteristics over the Complex Terrain of the Loess Plateau Semiarid Region

Table 1

Main observation systems, instrument types, and installation heights.

Observation system	Instrument	Type	Manufacturer	Installation height
Boundary layer meteorological elements	Wind velocity sensor	014A-L	Met One	1, 2, 4, 8, 12, 16, and 32 m
	Wind direction sensor	034B-L	Met One	8 m
	Temperature and humidity probe	HMP45C-L	Vaisala	1, 2, 4, 8, 12, 16, and 32 m
	Barometric pressure sensor	CS105	Vaisala	1 m
Eddy covariance system	3D sonic anemometer	CSAT3	Campbell	2.88 m
	Opened path infrared CO2/H2O analyzer	LI7500	LI-COR	2.88 m
Surface radiation observation system	Shortwave radiation	CM21	Kipp & Zonen	1.5 m
	Longwave radiation	CG4	Kipp & Zonen	1.5 m