Characterizing CO2 fluxes for growing and non-growing seasons in a shrub ecosystem on the Qinghai-Tibet Plateau
Xu, SX; Zhao, XQ; Fu, YL; Zhao, L; Li, YN; Cao, GM; Gu, S; Wang, QX; Du, MY
刊名science in china series d-earth sciences
2005-04-01
卷号48期号:april页码:133-140
关键词alpine shrub ecosystem CO2 flux carbon dynamics growing season non-growing season
合作状况其它
中文摘要to assess carbon budget for shrub ecosystems on the qinghai-tibet plateau, co2 flux was measured with an open-path eddy covariance system for an alpine shrub ecosystem during growing and non-growing seasons. co2 flux dynamics was distinct between the two seasons. during the growing season from may to september, the ecosystem exhibited net co2 uptake from 08:00 to 19:00 (beijing standard time), but net co2 emission from 19:00 to 08:00. maximum co2 uptake appeared around 12:00 with values of 0.71, 1,19, 1.46 and 0.67 g co2 m(-2) h(-1) for june, july, august and september, respectively. diurnal fluctuation of co2 flux showed higher correlation with photosynthetic photon flux density than temperature. the maximum net co2 influx occurred in august with a value of 247 g co2 m(-2). the total co2 uptake by the ecosystem was up to 583 g co2 m(-2) for the growing season. during the non-growing season from january to april and from october to december, co2 flux showed small fluctuation with the largest net co2 efflux of 0.30 g co2 m(-2) h(-1) in april. the diurnal co2 flux was close to zero during most time of the day, but showed a small net co2 eff lux from 11:00 to 18:00. diurnal co2 flux, is significantly correlated to diurnal temperature in the non-growing season. the maximum monthly net co2 eff lux appeared in april, with a value of 105 g co2 m(-2). the total net co2 eff lux for the whole non-growing season was 356 g co2 m(-2).
英文摘要to assess carbon budget for shrub ecosystems on the qinghai-tibet plateau, co2 flux was measured with an open-path eddy covariance system for an alpine shrub ecosystem during growing and non-growing seasons. co2 flux dynamics was distinct between the two seasons. during the growing season from may to september, the ecosystem exhibited net co2 uptake from 08:00 to 19:00 (beijing standard time), but net co2 emission from 19:00 to 08:00. maximum co2 uptake appeared around 12:00 with values of 0.71, 1,19, 1.46 and 0.67 g co2 m(-2) h(-1) for june, july, august and september, respectively. diurnal fluctuation of co2 flux showed higher correlation with photosynthetic photon flux density than temperature. the maximum net co2 influx occurred in august with a value of 247 g co2 m(-2). the total co2 uptake by the ecosystem was up to 583 g co2 m(-2) for the growing season. during the non-growing season from january to april and from october to december, co2 flux showed small fluctuation with the largest net co2 efflux of 0.30 g co2 m(-2) h(-1) in april. the diurnal co2 flux was close to zero during most time of the day, but showed a small net co2 eff lux from 11:00 to 18:00. diurnal co2 flux, is significantly correlated to diurnal temperature in the non-growing season. the maximum monthly net co2 eff lux appeared in april, with a value of 105 g co2 m(-2). the total net co2 eff lux for the whole non-growing season was 356 g co2 m(-2).
学科主题生物科学
WOS标题词science & technology ; physical sciences
类目[WOS]geosciences, multidisciplinary
研究领域[WOS]geology
关键词[WOS]carbon-dioxide fluxes ; prairie ; northern ; storage ; plains ; soil
收录类别SCI
语种英语
WOS记录号WOS:000229942300013
公开日期2009-12-09
内容类型期刊论文
源URL[http://ir.nwipb.ac.cn/handle/363003/1367]  
专题西北高原生物研究所_中国科学院西北高原生物研究所
作者单位1.Chinese Acad Sci, NW Inst Plateau Biol, Xining 810001, Peoples R China
2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
3.Chinese Acad Sci, Grad Sch, Beijing 100136, Peoples R China
4.Natl Inst Environm Studies, Tsukuba, Ibaraki 3058569, Japan
5.Natl Inst Agroenvironm Sci, Tsukuba, Ibaraki 3058604, Japan
推荐引用方式
GB/T 7714
Xu, SX,Zhao, XQ,Fu, YL,et al. Characterizing CO2 fluxes for growing and non-growing seasons in a shrub ecosystem on the Qinghai-Tibet Plateau[J]. science in china series d-earth sciences,2005,48(april):133-140.
APA Xu, SX.,Zhao, XQ.,Fu, YL.,Zhao, L.,Li, YN.,...&Du, MY.(2005).Characterizing CO2 fluxes for growing and non-growing seasons in a shrub ecosystem on the Qinghai-Tibet Plateau.science in china series d-earth sciences,48(april),133-140.
MLA Xu, SX,et al."Characterizing CO2 fluxes for growing and non-growing seasons in a shrub ecosystem on the Qinghai-Tibet Plateau".science in china series d-earth sciences 48.april(2005):133-140.
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