GDP: Guandu Nature Park Flux Station

                      
General site detail (Updated 21 January 2016)
 Site name
 Guandu Nature Park Flux Station
 AsiaFlux site code
 GDP
 Location Guandu Natural Park, Taipei City, Taiwan
 Position 121° 28' E, 25° 07' N
 Elevation 4 m above sea level
 Slope 0 %
 Terrain type
 Grass marsh
 Area 
 Fetch 
 Climate Cfa
 Mean annual air temperature
 23.0 °C
 Mean annual precipitation
 2405.1mm
 Vegetation type
 Grass
 Domestic species (Overstory)
 Brachiaria mutica (Tower 1); Phragmites australis (Tower 2)
 Dominant species (Understory)
 -
 Canopy height
 1.2m (Tower 1); 3.0m (Tower 2)
 Age 
 LAI 
 Soil type
 Clay

Observations
Eddy Covariance method (CO2)
 System 
 Wind speed 
 YOUNG81000 (2010/11/26-2014/3/26)
 CSAT-3 (2014/3/27-)
 Air temperature
 Sonic temperature (2010/11/26-2015/10/28)
 J-type thermocouple (2015/10/28-)
 Water vapor
 LI-7500 (2010/11/26-)
 CO2 LI-7500 (2010/11/26-)
 Measurement height
 3.5 m
 Sampling frequency
 10 Hz
 Averaging time
 30 min
 Data logger
 CR1000 (Campbell, USA)
 Data storage
 CF card / PC
 Original data
 Raw data

Meteorology
 Observation items
  Levels/ Depth
 Instrument 
 Global solar radiation(incoming)
 3.5 m CNR-1
 Global solar 
radiation (outgoing)
 3.5 m CNR-1
 Long-wave radiation(incoming) 
 3.5 m CNR-1
  Long-wave radiation(outgoing) 3.5 m CNR-1
 Net radiation
 3.5 m CNR-1
 PPFD (incoming)
 3.5 m
 LI-190
 PPFD (outgoing)
 -  
 Direct / diffuse radiation
 - 
 Direct / diffuse PPFD
 - 
 Air temperature
 3.5 m  HMP-45C (2010/12/21-)
  J-type thermocouple (2015/10/28-)
 Humidity 3.5 m  HMP-45C (2010/12/21-)
 Soil temperature
 10cm/20cm  J-type thermocouple (2011/6/1-2014/4/9)
 Soil heat flux
 10cm/20cm  HFP01 (2011/6/1-2014/4/9)
 Soil water 
 content 
 10cm/20cm  CS-616 (2011/10/12-)
 Wind speed
 3.5m
  YOUNG81000 (2010/11/26-2014/3/26)
 CSAT-3 (2014/3/27-)
 Wind direction
 3.5m YOUNG81000 (2010/11/26-2014/3/26)
 CSAT-3 (2014/3/27-)
 Barometric 
 pressure
 3.5m  LI-7500 (2010/11/26-)
 Precipitation 3.5m Tipping bucket type Rain Gauge, No. 34-T (OTA  KEIKI SEISAKUSHO CO., LTD., Japan)
 COconcentration
 3.5m LI-7500 (2010/11/26-)
 H2O concentration 3.5m LI-7500 (2010/11/26-)
Other
 Lysimeter -
 Throughfall -
 Sapflow -
 Soil respiration -
 
Observation Period and data Availability
 Measurement Period
 2010/11/26~(now) (Tower 1); 
 2012/12/09~2015/08/04 (Tower 2)
 Measurement Frequency
 10Hz
 Data Availability
 -
Contact
 Jehn-Yih Juang (jjuang@ntu.edu.tw)
Department of Geography, National Taiwan University
No 1 Sec 4 Roosevelt Rd, Taipei 10617, TAIWAN
Infrastructure
 Brachiaria mutica (Tower 1); Phragmites australis (Tower 2)



Research Fund
 Ministry of Science and Technology, Taiwan
National Taiwan University



URL

 http://homepage.ntu.edu.tw/~jjuang/


Publication

 1. Lin K-M, Juang J-Y and Chang L-F (accepted), Improving Estimation of Bowen Ratio for Application in Air Quality Models by Integrating a Simplified Analytical Expression with Measurement Data, Journal of Applied Meteorology and Climatology

2. Lee S-C, Fan C-J, Wu Z-Y and Juang J-Y (2015) Investigating effect of environmental controls on dynamics of CO2 budget in a subtropical estuarial marsh wetland ecosystem, Environmental Research Letters,10 025005.