The evapotranspiration(ET) of alpine meadow ecosystem in the upper reach of the Shulehe River Basin, Northeastern Qinghai-Tibetan Plateau during the main growing season in 2011 was measured using the microlysimeter(ML) method,the eddy covariance(EC) technique,and the Bowen Ratio Energy Balance(BREB) method.Results showed that the turbulent fluxes measured by EC and available fluxes measured by BREB system were imbalanced.The energy balance ratio(EBR) was 0.84.The reasons were as follows: non-synchronization...