Janssens Ivan A, Freibauer Annette, Ciais Philippe, Smith Pete, Nabuurs Gert-Jan, Folberth Gerd, Schlamadinger Bernhard, Hutjes Ronald W A, Ceulemans Reinhart, Schulze E-Detlef, Valentini Riccardo, Dolman A Johannes
Department of Biology, Universiteit Antwerpen, B-2160 Antwerpen, Belgium.
Science. 2003 Jun 6;300(5625):1538-42. doi: 10.1126/science.1083592. Epub 2003 May 22.
Most inverse atmospheric models report considerable uptake of carbon dioxide in Europe's terrestrial biosphere. In contrast, carbon stocks in terrestrial ecosystems increase at a much smaller rate, with carbon gains in forests and grassland soils almost being offset by carbon losses from cropland and peat soils. Accounting for non-carbon dioxide carbon transfers that are not detected by the atmospheric models and for carbon dioxide fluxes bypassing the ecosystem carbon stocks considerably reduces the gap between the small carbon-stock changes and the larger carbon dioxide uptake estimated by atmospheric models. The remaining difference could be because of missing components in the stock-change approach, as well as the large uncertainty in both methods. With the use of the corrected atmosphere- and land-based estimates as a dual constraint, we estimate a net carbon sink between 135 and 205 teragrams per year in Europe's terrestrial biosphere, the equivalent of 7 to 12% of the 1995 anthropogenic carbon emissions.
大多数大气反演模型显示，欧洲陆地生物圈吸收了大量二氧化碳。相比之下，陆地生态系统中的碳储量增长速度要小得多，森林和草地土壤中的碳增加量几乎被农田和泥炭土壤中的碳损失所抵消。将大气模型未检测到的非二氧化碳碳转移以及绕过生态系统碳储量的二氧化碳通量考虑在内，可大大缩小碳储量微小变化与大气模型估算的较大二氧化碳吸收量之间的差距。剩下的差异可能是由于碳储量变化方法中存在缺失的部分，以及两种方法都存在很大的不确定性。利用校正后的基于大气和陆地的估算作为双重约束，我们估计欧洲陆地生物圈每年的净碳汇在135至205太克之间，相当于1995年人为碳排放量的7%至12%。
