Turbulent exchange of CO over a broadleaf-Korean pine forest in Changbai Mountain, northeast China

Abstract

Turbulent exchange of CO₂ was measured continuously via the open-path eddy covariance technique over a broadleaf-Korean pine forest in Changbai Mountain, northeast China. The results show that with near-neutral atmospheric stratification, CO₂ and vertical wind components measured over the forest canopy in the inertial sub-range followed the expected -2/3 power law. The dominant vertical eddy scale was about 100 m. The frequency ranges of eddy contributions to CO₂ fluxes were mostly within 0.01–2.0 Hz. Large eddies with low frequency over the canopy contributed more to CO₂ fluxes than small eddies. The open-path eddy covariance system could satisfy the estimation of turbulent fluxes over the canopy, but the CO₂ fluxes between forest and atmosphere were generally underestimated at night because of the increment non-turbulent processes, suggesting that the CO₂ fluxes estimated under weak turbulence need to be revised correspondingly.

References

1. Aubinet M, Grelle A, Ibrom A, Rannik U, Moncrieff J, Foken T, Kowalski A S, Martin P H, Berbigier P, Bernhofer C, Clement R, Elbers J, Granier A, Grunwald T, Morgenstern K, Pilegaard K, Rebmann C, Snijders W, Valentini R, Vesala T (2000). Estimates of the annual net carbon and water exchange of Europeanforests: the Euroflux methodology. AdvEcol Res, 30: 113–175. doi:10.1016/S0065-2504(08)60018-5
2. Chai Y C, Zhou G S, Zhou L (2004). The Global Carbon Project, No.1.Beijing: China Meteorological Press, 11–12 (in Chinese)
3. Grelle A, Lindroth A (1996). Eddy-correlationsystem for long-term monitoring of fluxes of heat, water vapour andCO₂. Global ChangeBiol, 3: 297–307. doi:10.1111/j.1365-2486.1996.tb00081.x
4. Guan D X, Wu J B, Yu G R, Sun X M, Zhao X S, Han S J, Jin C J (2005). Meteorologicalcontrol on CO₂ flux above broad-leaved Koreanpine mixed forest in Changbai Mountains. Sci China (Series D), 48(Suppl 1): 116–122
5. Huang Y (2002). Study on carbon budget in terrestrial and marginal seaecosystems of China. Bull Acad Sin, 2: 104–107 (in Chinese)
6. Kaimal J C, Finnigan J J (1994). AtmosphericBoundary Layer Flows: Their Structure and Measurement. New York: Oxford University Press, 42–44
7. Kaimal J C, Wyngaard J C, Izumi Y, Cote O R (1972). Spectral characteristics of surface-layer turbulence. Quart J Roy Meteor Soc, 98: 563–589. doi:10.1002/qj.49709841707
8. Lee X H (1998). On micrometeorological observations of surface-air exchangeover tall vegetation. Agric For Meteor, 91: 39–49. doi:10.1016/S0168-1923(98)00071-9
9. Liu H P,Liu S H,Zhu T Y, Jin C J, Guan D X (1997). Determination ofaerodynamic parameters of Changbai Mountains forest. Acta Sci Nat Univ Pekinen, 33(4): 522–528 (in Chinese)
10. Ma Y M, Wang J M, Liu W, Zhang Q R, Mai B Q (1997). The study of thecharacteristics of both the atmospheric turbulence structure and thetransfer in the lower layer of the atmosphere above the Nansha Islandsarea. Sci Atmos Sin, 21(3): 357–366 (in Chinese)
11. Moore C J (1996). Frequency response corrections for eddy correlationsystems. Bound-Layer Meteorol, 37: 17–35. doi:10.1007/BF00122754
12. Stull R B (1988). An Introduction to Boundary Layer Meteorology. Dordrecht: Kluwer Academic Publishers, 133
13. Wen X F, Yu G R, Sun X M (2004). Uncertainties in long-term studiesof net ecosystem CO₂ exchange with the atmospherebased on eddy covariance technique. AdvEarth Sci, 19(4): 658–664 (in Chinese)
14. Wen X F, Yu G R, Sun X M, Sun X M, Liu Y F (2005). Turbulence flux measurementabove the overstory of a subtropical pinus plantation over the hillyregion. Sci China (Series D), 48(Suppl 1): 63–73
15. Wu J B, Guan D X, Sun X M, Yu G R, Zhao X S, Han S J (2004). Eddy flux corrections for CO₂ exchange in broadleaved Korean mixed forest of Changbai Mountains. Sci China (D), 34(Suppl 2): 95–102 (in Chinese)
16. Wu J B, Guan D X, Wang M, Pei T F, Han S J, Jin C J (2006). Year-round soil andecosystem respiration in a temperate broad-leaved Korean Pine forest. For Ecol Manage, 223(1–3): 35–44. doi:10.1016/j.foreco.2005.10.055
17. Wu J B, Guan D X, Zhao X S, Han S J (2005). CO₂ concentration character in broad-leavedKorean pine forest of Changbai Mountains. Chin J Appl Ecol, 16(1): 49–53 (in Chinese)
18. Yu G R, Zhang L M, Sun X M, Fu Y L, Li Z Q (2005). Advances in carbonflux observation and research in Asia. Sci China (Series D), 48(Suppl 1): 11–16
19. Yu J H, Liu J M, Ren J (2001). Turbulent features near the surfaceover the Yangtze delta. J Nanjing InstMeteorol, 24(4): 536–544 (in Chinese)
20. Zhou C Y, Zhou G Y, Zhang D Q, Wang Y H, Liu S Z (2004). CO₂ efflux from different forest soils and impact factors in DinghuMountain, China. Sci China (D), 34(Suppl 2): 175–182 (in Chinese)