Quantification of the regional carbon cycle of the biosphere: Policy, science and land-use decisions

Cihlar, J.

doi:10.1016/j.jenvman.2006.07.014

Cited by 9 publications

(7 citation statements)

References 21 publications

(22 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Soil carbon sequestration is largely related to environmental conditions such as climate, microbiology, and soil physical and chemical properties (Li et al, 1994;Cihlar, 2007;Gami et al, 2009). The conversion rate at the Urumqi site (26.7%) is a little higher than those results from semi-arid temperate (14%-21%) (Rasmussen and Collins., 1991).…”

Section: Factors Regulating Soil Carbon Sequestrationmentioning

confidence: 99%

Soil organic carbon dynamics under long-term fertilizations in arable land of northern China

et al. 2010

View full text Add to dashboard Cite

Abstract. Soil carbon sequestration is a complex process influenced by agricultural practices, climate and soil conditions. This paper reports a study of long-term fertilization impacts on soil organic carbon (SOC) dynamic from six long-term experiments. The experiment sites are located from warm-temperate zone with a double-cropping system of corn (Zea mays L.) -wheat (Triticum Aestivium L.) rotation, to mild-temperate zones with mono-cropping systems of continuous corn, or a three-year rotation of corn-wheatwheat. Mineral fertilizer applications result in an increasing trend in SOC except in the arid and semi-arid areas with the mono-cropping systems. Additional manure application is important to maintain SOC level in the arid and semi-arid areas. Carbon conversion rate is significant lower in the warmtemperate zone with double cropping system (6.8%-7.7%) than that in the mild-temperate areas with mono-cropping systems (15.8%-31.0%). The conversion rate is significantly correlated with annual precipitation and active accumulative temperature, i.e., higher conversion rate under lower precipitation and/or temperature conditions. Moreover, soil high in clay content has higher conversion rate than soils low in clay content. Soil carbon sequestration rate ranges from 0.07 to 1.461 t ha −1 year −1 in the upland of northern China. There is significantly linear correlation between soil carbon sequestration and carbon input at most sites, indicating that these soils are not carbon-saturated thus have potential to migrate more CO 2 from atmosphere.

show abstract

Section: Factors Regulating Soil Carbon Sequestrationmentioning

confidence: 99%

Soil organic carbon dynamics under long-term fertilizations in arable land of northern China

et al. 2010

View full text Add to dashboard Cite

show abstract

“…The coniferous species of five pines (Scots Pine) and five spruces (Norway Spruce, Picea abies) were first measured with HDS6000 from aside on 20 July 2009, and the deciduous species of 10 birches (Finland Birch) were measured in the same way based on the FARO Photon120 laser scanner, which had almost the same sampling setups with respect to HDS6000, on 28 May 2010. The crowns were firstly scanned by TLS producing the point cloud with number of 1 T , and then the leaves and branches of all the crowns were removed from outside step by step. The cut-off materials were weighted and recorded, and meanwhile, the remaining trees were scanned by TLS.…”

Section: Tls-biomass Data Acquired In Laboratorymentioning

confidence: 99%

“…Biomass serves as an important biophysical parameter appropriate for assessing a diversity of natural characteristics, from tree health, forest regeneration, biological balance, to energy conversion [1]. The biomass-associated studies are helpful for reflecting various processes of biophysichemical variations,…”

Section: Introductionmentioning

confidence: 99%

From TLS to VLS: Biomass Estimation at Individual Tree Level

et al. 2010

View full text Add to dashboard Cite

This study explores the applicability of vehicle-based laser scanning (VLS) for biomass estimation at individual tree level, since biomass serves as an essential biophysical parameter indicating tree health. Previous work suggests that terrestrial laser scanning (TLS) has been primarily validated for biomass prediction, however, in subject to laborious relocation in practice. VLS, as an advanced mode of TLS with more flexible mobility and also high sampling density, can work as a new efficient technique for surveying single trees. Combined with the positive binds between the biomass and TLS-samplings during manual defoliation, this work aims to seek the relations between biomass and VLS-samplings, by correlating the VLS-and TLS-samplings within the same crowns during natural foliation. The resulting R 2 values of the two correlations after normalization are larger than 0.88 and 0.61, respectively, and the associated root mean square errors (RMSEs) are less than 0.051 and 0.076. VLS, thus, can be validated for estimating biomass at the individual tree level, with the TLS-investigated data as a bridging reference.

show abstract

“…The last report of the Intergovernmental Panel on Climate Change has outlined the importance to determine a base line for organic carbon. This protocol has valuated the carbon as a producer good and the net primary productivity as a resource of future economical benefits (Cihlar, 2007). This requires developing scientific methods to delineate biomass distribution at scales from local and regional to global with their respective uncertainty (Moutiñ o and Schwartzman, 2005;Herold et al, 2006;DeFries et al, 2007;Gibbs et al, 2007;Pearson et al, 2008).…”

Section: Introductionmentioning

confidence: 99%