JOURNAL OF NATURAL RESOURCES ›› 2008, Vol. 23 ›› Issue (3): 391-399.doi: 10.11849/zrzyxb.2008.03.005

• Special Column:Celebration of the 70th Anniversary of IGSNRR, CAS • Previous Articles     Next Articles

Study on the Energy Balance Closure of Alpine Meadow on Tibetan Plateau

LI Quan1,2, ZHANG Xian-zhou1, SHI Pei-li1, HE Yong-tao1, XU Ling-ling1,2, SUN Wei1,2   

  1. 1. Institute of Geographic Sciences and Natural Resources Research,CAS,Beijing 100101,China;
    2. Graduate University of Chinese Academy of Sciences,Beijing 100049,China
  • Received:2007-03-12 Revised:2007-12-17 Online:2008-05-28 Published:2008-05-28

Abstract: Through adopting the means of OLS Linearity return and calculating EBR energy balance,and based on the three-year flux amount data of Damxung rangeland station,we conducted a research on the energy balance closure aiming at the Tibet Plateau alpine meadow.The results show that,there exists a phenomenon of in-complete closure of energy and the slope of OLS curve is relatively low.The closure condition of energy balance in growing season is better than that in non-growing season;day-time is better than night;fine day is better than windy,rainy or snowy days.Later on,we have an analysis on the reason in energy in-closure.When the time of latent heat fluxes,sensible heat fluxes and soil heat fluxes is advanced,the closure condition of energy balance is improved.We draw a conclusion that the difference in the rate of heat transference has a great impact on the energy balance closure.Other reasons as the deviations in samples and instrument,the loss of high frequency and low frequency,the ignorance of some energy item and loss of advection have also contributed to the in-closure of energy balance.

Key words: eddy covariance, energy balance closure, the slope of OLS, alpine meadow

CLC Number: 

  • S718.5??