大气科学进展（英文版）
大氣科學進展（英文版）
대기과학진전（영문판）
ADVANCES IN ATMOSPHERIC SCIENCES
2010年
6期
1372-1379
,共8页
姜春明%于贵瑞%曹广民%李英年%张世春%方华军
薑春明%于貴瑞%曹廣民%李英年%張世春%方華軍
강춘명%우귀서%조엄민%리영년%장세춘%방화군
CO2通量%青藏高原%回归方法%高山草甸%温度敏感性%估算%高寒草甸%二氧化碳
CO2通量%青藏高原%迴歸方法%高山草甸%溫度敏感性%估算%高寒草甸%二氧化碳
CO2통량%청장고원%회귀방법%고산초전%온도민감성%고산%고한초전%이양화탄
CO2 emission%static chamber technique%nonlinearity%underestimation%Qinghai-Tibetan Plateau
CO2 efflux was estimated using different regression methods in static chamber observation from an alpine meadow on the Qinghai-Tibetan Plateau. The CO2 efflux showed a seasonal pattern, with the maximun flux occurring in the middle of July. The temperature sensitivity of CO2 efflux （Q10） was 3.9, which was at the high end of the range of global values. CO2 emissions calculated by linear and nonlinear regression were significantly different （p 〈0.05）. Compared with the linear regression, CO2 emissions calculated by exponential regression and quadratic regression were 12.7% and 11.2% larger, respectively. However, there were no significant differences in temperature sensitivity values estimated by the three methods. In the entire growing season, the CO2 efflux estimated by linear regression may be underestimated by up to 25% compared to the real CO2 efflux. Consequently, great caution should be taken when using published flux data obtained by linear regression of static chamber observations to estimate the regional CO2 flux in alpine meadows on the Qinghai-Tibetan Plateau.
