Nigel T Roulet
Datos Biográficos
| ID | 6016213 |
|---|---|
| NOMBRE | Nigel T Roulet |
| NOMBRES | Nigel T |
| APELLIDO | Roulet |
| FIRMA | ROULET N T |
| AFILIACIONES | McGill University |
| ORCID | 0000-0001-9571-1929 |
| VERIFICADO | Sí |
| TOTAL DE OBRAS | 12 |
| TOTAL DE CITAS | 0 |
| TOTAL COMO AUTOR | 12 |
| TOTAL COMO EDITOR | 0 |
| PRIMER AÑO DE PUBLICACIÓN | 1980 |
| AÑO MÁS RECIENTE DE PUBLICACIÓN | 2020 |
| ÍNDICE H | 0 |
Diverging pond dissolved organic matter characteristics yield similar CO 2 flux potentials in a disturbed High Arctic landscape
Climate warming and permafrost thaw have the potential to shift Arctic carbon (C) cycling dynamics so ponds, which represent over a quarter of northern circumpolar surface water area, may play a larger role in the mineralization of terrestrial C and emission of greenhouse gases (GHG). Here, we constrain how active layer detachments (ALDs) affect C cycling dynamics in High Arctic ponds ( n = 19) through the examination of geochemistry, dissolved o…
The biophysical climate mitigation potential of boreal peatlands during the growing season
Peatlands and forests cover large areas of the boreal biome and are critical for global climate regulation. They also regulate regional climate through heat and water vapour exchange with the atmosphere. Understanding how land-atmosphere interactions in peatlands differ from forests may therefore be crucial for modelling boreal climate system dynamics and for assessing climate benefits of peatland conservation and restoration. To assess the bioph…
Prompt active restoration of peatlands substantially reduces climate impact
Restoration of peatlands after peat extraction could be a benefit to the climate system. However a multi-year ecosystem-scale assessment of net carbon (C) sequestration is needed. We investigate the climate impact of active peatland restoration (rewetting and revegetating) using a chronosequence of C gas exchange measurements across post-extraction Canadian peatlands. An atmospheric perturbation model computed the instantaneous change in radiativ…
Focus on the impact of climate change on wetland ecosystems and carbon dynamics
The renewed growth in atmospheric methane (CH4) since 2007 after a decade of stabilization has drawn much attention to its causes and future trends. Wetlands are the single largest source of atmospheric CH4. Understanding wetland ecosystems and carbon dynamics is critical to the estimation of global CH4 and carbon budgets. After approximately 7 years of CH4 related research following the renewed growth in atmospheric CH4, Environmental Research L…
Can boreal peatlands with pools be net sinks for CO 2
Peatland open-water pools, a common feature on temperate to subarctic peatlands, are sources of carbon (C) to the atmosphere but their contribution to the net ecosystem carbon dioxide exchange (NEE-CO _2 ) is poorly known; there is a question as to whether peatlands with pools are smaller sinks of atmospheric C, or even C-neutral, compared to other peatlands. We present growing season NEE-CO _2 measurements using the eddy covariance technique in …
Climate control of terrestrial carbon exchange across biomes and continents
Understanding the relationships between climate and carbon exchange by terrestrial ecosystems \nis critical to predict future levels of atmospheric carbon dioxide because of the potential \naccelerating effects of positive climate–carbon cycle feedbacks. However, directly observed \nrelationships between climate and terrestrial CO2 exchange with the atmosphere across biomes \nand continents are lacking. Here we present data describing the relatio…
Greenhouse Gas Emissions from Canadian Peat Extraction, 1990–2000
This study uses life-cycle analysis to examine the net greenhouse gas (GHG) emissions from the Canadian peat industry for the period 1990-2000. GHG exchange is estimated for land-use change, peat extraction and processing, transport to market, and the in situ decomposition of extracted peat. The estimates, based on an additive GHG accounting model, show that the peat extraction life cycle emitted 0.54 x 10(6) t of GHG in 1990, increasing to 0.89 …
Greenhouse Gas Emissions from Canadian Peat Extraction, 1990–2000
This study uses life-cycle analysis to examine the net greenhouse gas (GHG) emissions from the Canadian peat industry for the period 1990–2000. GHG exchange is estimated for land-use change, peat extraction and processing, transport to market, and the in situ decomposition of extracted peat. The estimates, based on an additive GHG accounting model, show that the peat extraction life cycle emitted 0.54 × 106 t of GHG in 1990, increasing to 0.89 × …
The Hydrological Role of Peat‐covered Wetlands
Focus
Sampling of Snow and Ice on Lakes
Three years' data, based on unusually large random samples, are combined to characterize the late February snow, white ice, and black ice cover of Elizabeth Lake, Labrador. Similar spatial patterns were found to exist between years with central and marginal locations tending to exhibit consistently above- or below-average thickness for particular cover components. It is suggested that maps combining the three years' data and displaying the result…
Illustration of the Roles of Snow in the Evolution of the Winter Cover of a Lake
Spatial patterns in the snow and ice cover of Elizabeth Lake, Labrador, as surveyed in late February 1979, are displayed and analysed. Relationships between distinct trends in the ice and less distinct trends in the snow are discussed within a context of processes operative during a winter. The nature of and spatial patterns in the winter cover of lakes and of their evolution have important implications for those interested in generalizing about …
Sin obras prominentes en esta página.
Illustration of the Roles of Snow in the Evolution of the Winter Cover of a Lake
Spatial patterns in the snow and ice cover of Elizabeth Lake, Labrador, as surveyed in late February 1979, are displayed and analysed. Relationships between distinct trends in the ice and less distinct trends in the snow are discussed within a context of processes operative during a winter. The nature of and spatial patterns in the winter cover of lakes and of their evolution have important implications for those interested in generalizing about …
Sampling of Snow and Ice on Lakes
Three years' data, based on unusually large random samples, are combined to characterize the late February snow, white ice, and black ice cover of Elizabeth Lake, Labrador. Similar spatial patterns were found to exist between years with central and marginal locations tending to exhibit consistently above- or below-average thickness for particular cover components. It is suggested that maps combining the three years' data and displaying the result…
The Hydrological Role of Peat‐covered Wetlands
Focus
Greenhouse Gas Emissions from Canadian Peat Extraction, 1990–2000
This study uses life-cycle analysis to examine the net greenhouse gas (GHG) emissions from the Canadian peat industry for the period 1990-2000. GHG exchange is estimated for land-use change, peat extraction and processing, transport to market, and the in situ decomposition of extracted peat. The estimates, based on an additive GHG accounting model, show that the peat extraction life cycle emitted 0.54 x 10(6) t of GHG in 1990, increasing to 0.89 …
Greenhouse Gas Emissions from Canadian Peat Extraction, 1990–2000
This study uses life-cycle analysis to examine the net greenhouse gas (GHG) emissions from the Canadian peat industry for the period 1990–2000. GHG exchange is estimated for land-use change, peat extraction and processing, transport to market, and the in situ decomposition of extracted peat. The estimates, based on an additive GHG accounting model, show that the peat extraction life cycle emitted 0.54 × 106 t of GHG in 1990, increasing to 0.89 × …
Climate control of terrestrial carbon exchange across biomes and continents
Understanding the relationships between climate and carbon exchange by terrestrial ecosystems \nis critical to predict future levels of atmospheric carbon dioxide because of the potential \naccelerating effects of positive climate–carbon cycle feedbacks. However, directly observed \nrelationships between climate and terrestrial CO2 exchange with the atmosphere across biomes \nand continents are lacking. Here we present data describing the relatio…
Can boreal peatlands with pools be net sinks for CO 2
Peatland open-water pools, a common feature on temperate to subarctic peatlands, are sources of carbon (C) to the atmosphere but their contribution to the net ecosystem carbon dioxide exchange (NEE-CO _2 ) is poorly known; there is a question as to whether peatlands with pools are smaller sinks of atmospheric C, or even C-neutral, compared to other peatlands. We present growing season NEE-CO _2 measurements using the eddy covariance technique in …
Focus on the impact of climate change on wetland ecosystems and carbon dynamics
The renewed growth in atmospheric methane (CH4) since 2007 after a decade of stabilization has drawn much attention to its causes and future trends. Wetlands are the single largest source of atmospheric CH4. Understanding wetland ecosystems and carbon dynamics is critical to the estimation of global CH4 and carbon budgets. After approximately 7 years of CH4 related research following the renewed growth in atmospheric CH4, Environmental Research L…
Prompt active restoration of peatlands substantially reduces climate impact
Restoration of peatlands after peat extraction could be a benefit to the climate system. However a multi-year ecosystem-scale assessment of net carbon (C) sequestration is needed. We investigate the climate impact of active peatland restoration (rewetting and revegetating) using a chronosequence of C gas exchange measurements across post-extraction Canadian peatlands. An atmospheric perturbation model computed the instantaneous change in radiativ…
Diverging pond dissolved organic matter characteristics yield similar CO 2 flux potentials in a disturbed High Arctic landscape
Climate warming and permafrost thaw have the potential to shift Arctic carbon (C) cycling dynamics so ponds, which represent over a quarter of northern circumpolar surface water area, may play a larger role in the mineralization of terrestrial C and emission of greenhouse gases (GHG). Here, we constrain how active layer detachments (ALDs) affect C cycling dynamics in High Arctic ponds ( n = 19) through the examination of geochemistry, dissolved o…
The biophysical climate mitigation potential of boreal peatlands during the growing season
Peatlands and forests cover large areas of the boreal biome and are critical for global climate regulation. They also regulate regional climate through heat and water vapour exchange with the atmosphere. Understanding how land-atmosphere interactions in peatlands differ from forests may therefore be crucial for modelling boreal climate system dynamics and for assessing climate benefits of peatland conservation and restoration. To assess the bioph…
Geography (9 obras) · Ecology (8 obras) · Environmental Science (8 obras) · Geology (8 obras) · Peatlands and Wetlands Ecology (8 obras) · Ecosystem (6 obras) · Peat (6 obras) · Atmospheric sciences (5 obras) · Chemistry (5 obras) · Climate change (5 obras)