| 来源类型 | Article |
| 规范类型 | 其他 |
| DOI | 10.3390/rs4102923 |
| Capability of C-band SAR for operational wetland monitoring at high latitudes. | |
| Reschke J; Bartsch A; Schlaffer S; Schepaschenko D | |
| 发表日期 | 2012 |
| 出处 | Remote Sensing 4 (10): 2923-2943 |
| 出版年 | 2012 |
| 语种 | 英语 |
| 摘要 | Wetlands store large amounts of carbon, and depending on their status and type, they release specific amounts of methane gas to the atmosphere. The connection between wetland type and methane emission has been investigated in various studies and utilized in climate change monitoring and modelling. For improved estimation of methane emissions, land surface models require information such as the wetland fraction and its dynamics over large areas. Existing datasets of wetland dynamics present the total amount of wetland (fraction) for each model grid cell, but do not discriminate the different wetland types like permanent lakes, periodically inundated areas or peatlands. Wetland types differently influence methane fluxes and thus their contribution to the total wetland fraction should be quantified. Especially wetlands of permafrost regions are expected to have a strong impact on future climate due to soil thawing. In this study ENVISAT ASAR Wide Swath data was tested for operational monitoring of the distribution of areas with a long-term SW near 1 (hSW) in northern Russia (SW = degree of saturation with water, 1 = saturated), which is a specific characteristic of peatlands. For the whole northern Russia, areas with hSW were delineated and discriminated from dynamic and open water bodies for the years 2007 and 2008. The area identified with this method amounts to approximately 300,000 km2 in northern Siberia in 2007. It overlaps with zones of high carbon storage. Comparison with a range of related datasets (static and dynamic) showed that hSW represents not only peatlands but also temporary wetlands associated with post-forest fire conditions in permafrost regions. Annual long-term monitoring of change in boreal and tundra environments is possible with the presented approach. Sentinel-1, the successor of ENVISAT ASAR, will provide data that may allow continuous monitoring of these wetland dynamics in the future complementing global observations of wetland fraction. |
| 主题 | Ecosystems Services and Management (ESM) |
| 关键词 | Synthetic aperture radar C-band Wetland Dynamics |
| URL | http://pure.iiasa.ac.at/id/eprint/9985/ |
| 来源智库 | International Institute for Applied Systems Analysis (Austria) |
| 引用统计 | |
| 资源类型 | 智库出版物 |
| 条目标识符 | http://119.78.100.153/handle/2XGU8XDN/129398 |
| 推荐引用方式 GB/T 7714 | Reschke J,Bartsch A,Schlaffer S,et al. Capability of C-band SAR for operational wetland monitoring at high latitudes.. 2012. |
| 条目包含的文件 | ||||||
| 文件名称/大小 | 资源类型 | 版本类型 | 开放类型 | 使用许可 | ||
| remotesensing-04-029（10050KB） | 智库出版物 | 限制开放 | CC BY-NC-SA | 浏览 | ||
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