TGK: Tibet Grassland Site
General site details
| Site name | Tibet Grassland Site |
|---|---|
| AsiaFlux site code | TGK |
| Location | Naqu, Tibet |
| Position | 31.37° N, 91.90° E |
| Elevation | 4580 m a.s.l |
| Slope | Flat |
| Terrain type | Plateau |
| Area | - |
| Fetch | over 2 km for all direction |
| Climate | Cool continental climate(Dwc) |
| Mean annual air temperature | - |
| Mean annual precipitation | - |
| Vegetation type | Short grass |
| Dominant Species (Overstory) | - |
| Dominant Species (Understory) | - |
| Canopy height | < 0.5m |
| Age | - |
| LAI | < 0.5 |
| Soil type | Sandy silt loam |
Observation
Eddy Covariance method (CO2)
| 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 | |
| Measurement height | 3 m |
| Sampling frequency | 20HZ in 1998 / 10Hz in 2002 |
| Averaging time | 30 min |
| Data logger | CR9000 (Campbell, USA) |
| Data storage | HDD, CD-R |
| Original data | Raw and Statistics |
Meteorology
| Observation items | Levels/Depth | Instrument |
|---|---|---|
| Global solar radiation(incoming) | - | Net radiometer (CNR1, Kipp & Zonen, Netherlands) |
| Global solar radiation (outgoing) | - | Net radiometer (CNR1, Kipp & Zonen, Netherlands) |
| Long-wave radiation(incoming) | - | Net radiometer (CNR1, Kipp & Zonen, Netherlands) |
| Long-wave radiation(outgoing) | - | Net radiometer (CNR1, Kipp & Zonen, Netherlands) |
| Net radiation | - | Net radiometer (CNR1, Kipp & Zonen, Netherlands) |
| Air temperature | 3 m | Fine-wire thermocouple |
| 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 |
| Precipitation | - | TE525(Campbell Scientific, USA) |
| H2O concentration | 3m | KH2O(Campbell Scientific, USA) |
Other
| Soil respiration | - |
| Photosynthesis | - |
| Ecological investigation | - |
Observation Period and Data Availability
| Measurement Period | May-September, 1998 / June-December, 2002 |
|---|---|
| Measurement Frequency | Continuous |
| Data Availability | N/A |
Contact
Joon Kim (joon [at] snu.ac.kr)
Department of Landscape Architecture & Rural Systems Engineering, Seoul National UniversityComplex Systems Science Laboratory, Bld.36/Rm.108, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-742, Korea
Phone : +82-2-880-4663 Fax : +82-2-365-5163
Publication
Jinkyu Hong, Taejin Choi, Hirohiko Ishikawa and Joon Kim, 2004. Turbulence structures in the near-neutral surface layer on the Tibetan Plateau, Geophysical Ressearch Letter, 31, L15106, doi:1029/10.2004GL019935
Taejin Choi, Jinkyu Hong, Joon Kim, Heechoon Lee, Jun Asanuma, Hirohiko Ishikawa, Osamu Tsukamoto, Gao Zhiqiu, Yaoming Ma, Kenichi Ueno, Jiemin Wang, Toshio Koike, Tetsuo Tasunari, 2004. Turbulent exchange of heat, water vapor and momentum over Tibetan prairie by eddy covariance and flux variance measurements. Journal of Geophysical Research, 109, D21106, doi:1029/2004JD00476