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CBF: Boreal Forest _ Chinese Boreal Forest Ecosystem
Research Station

General site detail (Updated 17 December 2007)

Site name	Boreal Forest _ Chinese Boreal Forest Ecosystem Research Station
AsiaFlux site code	CBF
Location	Huzhong National Nature Reserve in Heilongjiang Province, China
Position	51º 46' 52" N, 123º 01' 04" E (GPS)
Elevation	773 m a.s.l. (GPS)
Slope	0º
Terrain type	Low Mountain Area
Area	N/A
Fetch	1000m
Climate	Continental monsoon climate
Mean annual air temperature	- 4.4°C
Mean annual precipitation	481.6 mm
Vegetation type	Boreal forest
Domestic species (Overstory)	Larix gmelinii, Betula platyphylla Suk. , Pinus sylvestris var. mongolica.
Dominant species (Understory)	(shrub) Ledum palustre, Vaccinium vitis-idaea, Rhododendron dauricum, Alnus mandshurica, (grass) Deyeuxia angustifolia, Carex appendiculata
Canopy height	15 m
Age	N/A
LAI	0.9
Soil type	Brown coniferous forest soil

Observations
Eddy Covariance method (CO₂)

System	Open-path system
Wind speed	CSAT3 3-D SONIC Anemometer
Air temperature	HMP45C, Vaisala, Helsinki, Finland
Water vapor	CS 7500 (LI-COR LI 7500 open-path CO₂/H₂O Analyzer)
CO₂	CS 7500 (LI-COR LI 7500 open-path CO₂/H₂O Analyzer)
Measurement height	1.5, 35m
Sampling frequency	10Hz
Averaging time	30min
Data logger	CR5000
Data storage	2G PC card
Original data	Raw data

Meteorology

Observation items	Levels/ Depth	Instrument
Global solar radiation(incoming)	35 m	CNR1, Kipp & Zonen. Corp., Delft, Holland
Global solar radiation (outgoing)	35 m	CNR1, Kipp & Zonen. Corp., Delft, Holland
Long-wave radiation(outgoing)	35 m	CNR1, Kipp & Zonen. Corp., Delft, Holland
Long-wave radiation(outgoing)	35 m	CNR1, Kipp & Zonen. Corp., Delft, Holland
Net radiation	35 m	CNR1, Kipp & Zonen. Corp., Delft, Holland
PPFD (incoming)	35 m	LI-190Sb，LI-COR Inc., Lincoln, NE, USA
PPFD (outgoing)	-
Direct / diffuse radiation	-
Direct / diffuse PPFD	-
Air temperature	1.5, 15, 25, 32 m	HMP45C, Vaisala, Helsinki, Finland
Humidity	1.5, 15, 25, 32 m	HMP45C, Vaisala, Helsinki, Finland
Soil temperature	0, 5, 10, 15, 20, 30 cm	107L, Campbell Scientific Inc., USA
Soil heat flux	8 cm	HFP01, Hukseflux Inc., Netherlands
Soil water content	8cm	CS616, Campbell Scientific Inc., USA
Wind speed	1.5, 15, 25, 32 m	010C, Met One Instruments, Inc., Oregon, USA
Wind direction	32 m	020C, Met One Instruments, Inc., Oregon, USA
Barometric pressure	1 m	CS105, Vaisala, Helsinki, Finland
Precipitation	37 m	TE525, RM Young Inc., Traverse City, MI, USA
CO₂concentration	1.5 m	LI840, LI-COR Inc., Lincoln, NE, USA

Other

Soil respiration	LI-6400-09(Li-cor, Lincoln, NE, USA)
Photosynthesis	LI-6400R Portable Photosynthesis System(Li-cor, Lincoln, NE, USA)
Ecological investigation	Biomass, Litter, Leaf area index, Chlorophyll

Observation Period and Data Availability

Measurement Period	July 2006 to present
Measurement Frequency	Continuous
Data Availability	N/A

Contact

Guangsheng ZHOU (gszhou [at] ibcas.ac.cn)
Key Laboratory of Vegetation and Environmental Change, Institute of
Botany, the Chinese Academy of Sciences, 20 Nanxincun, Xiangshan,
Haidian District, Beijing 100093, China

Bingrui JIA(jiabingrui [at] ibcas.ac.cn)
Wei ZENG (zengwei [at] ibcas.ac.cn)
Institute of Botany, the Chinese Academy of Sciences, 20 Nanxincun,
Xiangshan, Haidian District, Beijing 100093, China

Other Jian SONG (songjian [at]ibcas.ac.cn)

Calibration Information

Calibrations for all instruments would be done once a year

Infrastructure

Open path eddy covariance system, Micrometeorological system

Research Fund

- 'Integrated observation and simulation on vegetation-atmosphere
interactions over typical terrestrial ecosystems' funded by National
Natural Science Foundation of China (40625015)
-'Study on characteristics of carbon and nitrogen fluxes and their
environmental controls in Chinese terrestrial ecosystems' funded by the
- Chinese Academy of Sciences(KZCX2-YW-432)
Long-term ecological observation fund from Institute of Botany,
the Chinese Academy of Sciences