[TGK]
Tibet Grassland Site

Eddy correlation method

System	Open path system (CO2 flux, latent heat flux)
Wind speed	CSAT3(Campbell, USA) in 1998 / CSAT3(Campbell Scientific, USA) and DA-600(Kaijo Denki Co., Ltd., Japan) in 2002
Air temperature	Humidity and temperature probe (HMP45, Vaisala, the Netherlands)
Water Vapor	Krypton hygrometer (KH2O, Campbell Scientific, USA)
CO2	N/A
Measurement height	3 m
Sampling frequency	20HZ in 1998 / 10Hz in 2002
Averaging time	30 min
Data logger	CR9000(Campbell Scientific, USA)
Data storage	HDD, CD-R
Original data (Raw data or statistics)	Raw and Statistics

Meteorology

Observation items	Levels / Depth	Instrument
Global solar radiation (incoming)	N/A	Radiometer (CNR-1, Kipp & Zonen, the Netherlands)
Global solar radiation (outgoing)	N/A	Radiometer (CNR-1, Kipp & Zonen, the Netherlands)
Long-wave radiation (incoming)	N/A	Radiometer (CNR-1, Kipp & Zonen, the Netherlands)
Long-wave radiation (outgoing)	N/A	Radiometer (CNR-1, Kipp & Zonen, the Netherlands)
Net radiation	N/A	Radiometer (CNR-1, Kipp & Zonen, the Netherlands)
PPFD (incoming)	N/A	N/A
PPFD (outgoing)	N/A	N/A
Direct/diffuse radiation	N/A	N/A
Direct/diffuse PPFD	N/A	N/A
Air temperature	3m	Fine-wire thermocouple
Humidity	N/A	N/A
Soil temperature	N/A	N/A
Soil heat flux	N/A	N/A
Soil water content	N/A	N/A
Wind speed	3m in 1998 / 3, 20m in 2002	CSAT3(Campbell Scientific, USA) in 1998 / DA-600(Kaijo Denki Co. Ltd., Japan; 3,20m) CSAT3(Campbell Scientific, USA;20m) in 2002
Wind direction	3m in 1998 / 3, 20m in 2002	CSAT3(Campbell Scientific, USA) in 1998 / DA-600(Kaijo Denki Co. Ltd., Japan; 3,20m) CSAT3(Campbell Scientific, USA;20m) in 2002
Barometric pressure	N/A	N/A
Precipitation	N/A	TE525(Campbell Scientific, USA)
CO2 concentration	N/A	N/A
H2O concentration	3m	KH2O(Campbell Scientific, USA)

Other

Soil respiration	N/A
Photosynthesis	N/A
Ecological Investigation	N/A