Location
The Yingke oasis station is a cropland flux site, affiliated to Heihe Remote Sensing Experimental Research Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences(CAREERI,CAS). This station located in Yingke irrigation zone, belong to Zhangye city, Gansu province. The experimental area, situated in the middle stream Heihe river basin and with windbreaks space of 500m from east to west and 300m from south to north, is an ideal choice for its flat and open terrain. The Site coordinate: 100°24′37.2″E, 38°51′25.7″N, 1519.1m。The underlying surface of flux station is farmland and the main crop type is maize. The station represents seed maize type in the middle latitude hinterland of mainland, which belongs to the Zhangye Oasis in the middle basin of Heihe river.
Climatic
The Yingke oasis station is located in mid-latitudes mainland hinterland, affected by the atmospheric circulation and the Qinghai Tibet Plateau, Inner Mongolia plateau. The climate regionalization belongs to the temperate continental arid climate. The area is rich in light and heat, large wind and sand enough, dry and little rain, sunny, strong solar radiation, temperature difference rapidly between day and night,the uneven distribution of rainfall characteristics. There is stong wind and stand storm in spring in the station in Ganzhou district, annual average temperature is 7.3 ℃, extreme maximum temperature is 38.6 ℃, extreme minimum temperature is -28.2 ℃, annual average relative humidity is 52%, the average annual rainfall of 130.4 mm, surface evaporation 2002.5 mm, annual average sunshine hours-3065.6 hours, sunshine percentage is 69%, 12.3 day were windy days, sandstorm days to 11.8 days, frost-free period between138 and 179 days.
Vegetation and soil
The irrigation zone grow crop once a year, which is priority to maize seed production, between wheat and maize interpolating of wheat. The underlying surface vegetation in flux tower and source region is seed maize. The station area is located in the Zhangye basin of the alluvial plain which fine soil in Oasis irrigation silting soil primarily in Ganzhou district, the thickness of the soil is above 160cm, the soil nutrient content average as shown in the table：
Observation system
The Yingke oasis station have set up a weather station, close-path eddy-covariance flux measurement system. The eddy-covariance flux system is composed of three dimensional sonic anemometer(CSAT3, Campbell, USA）and open path CO2/H2O gas analyzer( Li7500, Li-cor, USA). The instrument mount-height was 2.81m, the ultrasound direction was at an azimuth angle of 0°, the distance between Li7500 and CSAT3 was 30cm and sampling frequency was 10HZ. Output Flux data are 30-minutes cycle.
Observation start from Dec. 27, 2007 to Dec. 31, 2011 Observation items of weather tower were multilayer (2m and 10m) of the wind speed and direction, air temperature and humidity, air pressure, precipitation, four components of radiation; the surface infrared temperature; the multilayer soil temperature (10cm, 20cm, 40cm, 80cm, 120cm and 160cm), the soil moisture (10cm, 20cm, 40cm, 80cm, 120cm and 160cm), and soil heat flux (5cm & 15cm).
Principal Investigator
Weizhen Wang
E-mail: weizhen@lzb.ac.cn
[1] Liu Qiang, Ma Mingguo, Wang Weizhen, Huang Guanghui, Zhang Zhihui, Tan Junlei. WATER: Dataset of eddy covariance observations at the Yingke oasis station. Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences. 2008. 10.3972/water973.0278.db
[2] Ma Mingguo, Wang Weizhen, Huang Guanghui, Zhang Zhihui,Tan Junlei. WATER: Dataset of automatic meteorological observations at the Yingke oasis station. Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences. 2008. 10.3972/water973.0284.db
[3] Zhangzhihui, Wang Weizhen, Ma Mingguo, Xu Ziwei, Wu Yueru, Huang Guanghui, Tan Junlei, Data processing and product analysis of Eddy Covariance flux data for WATER. Remote Sensing Technology and Application, 2010, 25(6): 788-796. View | Download
[4] Huang Guanghui, Ma Mingguo, Tan Junlei, Zhangzhihui. Data quality control and products of Automatic weather stations for Watershed Allied Telemetry Experimental Research. Remote Sensing Technology and Application, 2010, 25(6): 814-820.View | Download
[5] Ma Mingguo, Liu Qiang, Yan Guangjian, Chen Erxue, Xiao Qing, Supeixi, Hu Zeyong, Lixin, Niu Zheng, Wang Weizhen, Qian Jinbo, Song Yi, Ding Songshuang, Xin Xiaozhou, Ren Huazhong, Huang Chunlin, Jin Rui, Che Tao, Chu Rongzhong. Simultaneous remote sensing and ground-based experiment in the Heihe River Basin: Experiment of Forest Hydrology and Arid Region Hydrology in the Middle Reaches. Advances in Earth Science, 2009, 24(7): 681-695.View | Download
[6] Li Xin, Ma Mingguo, Wang J ian, Liu Qiang, Che Tao, Hu Zeyong, Xiao Qing, Liu Qinghuo, Su Peixi, Chu Rongzhong, Jin Rui, Wang Weizhen, Ran Youhua. Simultaneous remote sensing and ground based experiment in the Heihe river basin: Scientific objectives and experiment design[ J ]. Advances in Earth Science, 2008, 23 ( 9) : 897-914. View | Download
[7] Li X, Li XW, Li ZY, Ma MG, Wang J, Xiao Q, Liu Q, Che T, Chen EX, Yan GJ, Hu ZY, Zhang LX, Chu RZ, Su PX, Liu QH, Liu SM, Wang JD, Niu Z, Chen Y, Jin R, Wang WZ, Ran YH, Xin XZ, Ren HZ. Watershed Allied Telemetry Experimental Research. Journal of Geophysical Research, 2009, 114(D22103), doi:10.1029/2008JD011590.View | Download
[8] Wang Weizhen, Xu Ziwei, Liu Shaomin, Li xin, Mamingguo, Wang Jiemin.The characteristics of heat and water vapor fluxes over different surfaces in the Heihe River basin. Advances in Earth Science, 2009, 24(7): 714-723.View|Download
[9] Liu SM, Xu ZW, Wang WZ, Bai J, Jia Z, Zhu M, Wang JM. A comparison of eddy-covariance and large aperture scintillometer measurements with respect to the energy balance closure problem. Hydrology and Earth System Sciences, 2011, 15(4): 1291-1306. doi:10.5194/hess-15-1291-2011.