Location

 Site location: Tianmu tea plantation flux site is located in Liyang city of Jiangsu province. (31°16′14ʺ N and 119°27′15ʺ E; elevation approximately 91 m). It belongs to the field plot of tate Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences. The tea plantation in the upstream of Taihu region is also the typical vegetation type of the humid area of Southeast China.

Climatic

 Climate condition: This site is in a subtropical humid monsoon climate. Multi-year mean annual temperature is 15.8 ℃ and mean annual precipitation is 1155.8 mm. Owing to the joint effects of plum rains and typhoon, rainfall during the period of March to September occupies 76% of the annual precipitation. Total annual solar radiation is 469.3 KJ/cm². The yearly frost-free time add up to 224 days. The annual average sunshine time adds up to 2006.6 hours. It is also characterized by hot, usually humid summers and mild to cool winters. However, it is very suitable to the growth of vegetation.

Vegetation and soil

 Vegetation and soil: Tea plantation is the study vegetation type of tower-based measurements. Mountain sand soil is the main soil type. The soil thickness is lower than 60 cm. The gravel content is about 25%. The content of organic matter is about 2.56%.

Observation system

 Observation system: The flux tower was installed from the start of 2014 about 4 m high in the tea plantation. EC-150 was equipped at the height of 3 m. The conventional meteorological data comprise of wind direction/speed, air temperature/humility, and PAR quantum. Soil temperature, soil water content and electrical conductivity are also measured. The sampling frequency is 10 HZ, and the average time of flux data is 30 min.

Principal Investigator

 Hengpeng Li

E-mail: hpli@niglas.ac.cn