Rapid Assessment of Recent Changes in Land Cover and Carbon Balance in Beringia

提供资金，以开发和测试一种方法，用于快速评估整个白令吉亚地区多个地点的十年时间尺度土地覆盖变化模式，并衡量这些变化对生态系统碳平衡的可能影响。 该项目是通过参与瑞典白令吉亚2005年考察成为可能。 将与一位俄罗斯同事合作，在地块一级评估土地覆被变化，该同事在1984年至1986年期间在整个区域建立了标记地块。 在景观一级，将使用现代高空间分辨率卫星图像评估土地覆盖变化，以得出监督下的土地覆盖分类，并将其与根据新存档的历史航空照片和/或最近解密的军事间谍图像得出的土地覆盖图进行比较。 将与一位瑞典同事合作，在每个访问地点的多种土地覆盖类型中测量二氧化碳和甲烷的陆地-大气通量分量。 对于每一个多时期土地覆被评估，将把组分通量外推到景观水平，并将估计碳平衡随时间和空间的可能变化。将收集巨石、土壤和植被样本，用于受控实验室实验和分析，以便能够对一系列地球化学过程进行跨地点比较。

Funds are provided to develop and test a methodology for the rapid assessment of the patterns of decadal time scale land cover change at multiple sites throughout the Beringia region and to gauge the probable impact these changes have had on ecosystem carbon balance. The project is made possible by participation in the Swedish Beringia 2005 Expedition. Land cover change will be assessed at the plot level in collaboration with a Russian colleague who established marked plots throughout the region between 1984 and 1986. At the landscape level, land cover change will be assessed using modern high-spatial resolution satellite imagery to derive supervised land cover classifications that will be compared to land cover maps derived from newly archived historical air photos and/or recently declassified military spy imagery. Component land-atmosphere fluxes of carbon dioxide and methane will be measured in collaboration with a Swedish colleague in multiple land cover types at each site visited. Component fluxes will be extrapolated to the landscape level for each multi-temporal land cover assessment and the probable changes in carbon balance over time and space will be estimated. Monolith, soil, and vegetation samples will be collected for controlled laboratory experiments and analyses that will enable cross-site comparison of a range of biogeochemical processes.