排序方式: 共有3条查询结果,搜索用时 15 毫秒
1
1.
2.
《Climate Policy》2013,13(1):27-40
Abstract Atmospheric CO2 concentration can be decreased not only by reducing fossil fuel burning but also by increasing the terrestrial ecosystems that serve as sinks for CO2. The Kyoto Protocol allows countries that are burdened with emission reduction commitments to use carbon sequestration by terrestrial sinks. However, opinions differ widely on how the inclusion of terrestrial carbon sinks in the legally binding framework (Article 3.3) will affect the demand for emission reduction during the commitment period. We approach this issue by combining a simulation model of the carbon stock change with that of land-use change. The result of the simulation shows that the Annex I countries in total may potentially claim for a net carbon offset as high as 0.2 GtC per year by carrying out ARD (Afforestation, Reforestation and Deforestation) activities. In order to come up with an effective long-term climate regime, political decisions are necessary to realize an appropriate balance between the sink enhancement and the emission reduction. Sink activities should not be too large to eliminate the efforts for emission reduction, nor too small to discourage the efforts in enhancing sinks. Although prediction of sink activities is an extremely difficult venture, several estimates of the potential should be carefully considered before political decisions. Appropriate inclusion of sink activities is also crucial for ratifying the Kyoto Protocol. 相似文献
3.
This second paper reports the results of plant growth, plant mortality, plant leaf tissue metal and salt concentrations and
leachate quality monitoring from lysimeters in four large field trial treatments established on sulfidic waste rock/soil that
was used for haul road construction at a closed gold mine in Australia. The TerraB™, lime and clay treatments allowed good
tree growth of four Eucalypt species, compared to the control. There was no statistical difference in tree growth between
the TerraB™, lime or clay treatments over the 2 years of monitoring in this paper. However, the growth of one tree species
was poor in the TerraB™ treatment. Leaf tissue metal and major ion data are also presented. Leachate pH in the control became
increasingly acidic (pH 4.57–3.95). The addition of Ca(OH)2 and biosolids led to an initial increase in leachate pH, compared to the control; however, this has decreased over the duration
of the study (pH 5.37–4.89) and may affect the sustainable growth of plants in the future. In the TerraB™ and biosolids treatment
leachate pH increased to 6.92 after the first rainfall event and continued to increase over the duration of the study to pH
7.4 after 24 months. After 24 months average heavy metal leachate concentrations (mg/L) in the lysimeters for Al, Cd, Cu,
Mn and Zn were, control: 32.55, 5.67, 12.71, 39.29, 121.80, TerraB™: 0.07, 0.02, 0.07, 0.57, 0.23, and lime: 2.19, 1.19, 2.33,
3.6, 28.4. No leachate was available for collection from the clay treatment indicating that this technique was functioning
in terms of minimizing the infiltration of water into the mine soil. 相似文献
1