Terrestrial-atmosphere (1)

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Presentation transcript:

Terrestrial-atmosphere (1) Land-atmosphere interactions will be better represented with higher resolution – e.g. surface fluxes, hydrology, trace gases due to importance of surface heterogeneity on these processes What is the role of spatial and temporal heterogeneities in driving the coupled Arctic climate system and its response to climate change? What are the consequences of land-atmosphere feedbacks on the Arctic climate system? How do changes in the terrestrial surface (snow cover, land cover, hydrology, fires) affect things like precipitation recycling or clouds? How will large-scale expansion of shrublands affect Arctic climate dynamics? Thresholds are more dramatic in Arctic due to phase change

Terrestrial-atmosphere (2) Model intercomparison projects Component model development projects Dynamic vegetation modeling, canopy exchange Snow redistribution model projects Permafrost modeling and its impact on hydrology, surface energy balance, carbon cycle Stable boundary layer Hydrology and soil moisture ice sheets and glaciers biogeochemical models, trace gas emissions Validation Permafrost mapping Data rescue and recovery Station-based and remote sensing Optimal network design Identification of key data products, anything that can be measured Dave McGuire figure

Terrestrial-atmosphere (3) Modeling NASA Global modeling assimilation effort, incorporating SWE and soil moisture NEESPI, potential biogeochemical and land cover model intercomparison Adaptive-mesh regional and global modeling Validation IPY and other Arctic data collection efforts Arctic Observing Network Arctic system reanalysis

Terrestrial-atmosphere (4)

Terrestrial-atmosphere (5) Questions relating to societal impact Can we downscale to be able to answer site-specific questions? How do we represent heterogeneous sub-grid processes at regional grid-scales? How do we use site-specific measurements to validate regional-scale model? Focus til now has been on getting a regional coupled model to work How do specific environmental variables change (snow cover, extremes) in response to climate change?

Terrestrial-atmosphere (6) Food and energy security (e.g. can grow barley in Arctic but it can’t dry for harvest) Pollution, mercury from coal-fired power plants Role of stable boundary layer in pollution and smoke transports Water resources Arctic as a potential resource for future energy production (water, wind, biofuels, geothermal) Integrated assessment models WRF-Chem

Terrestrial-atmosphere (7) Arctic watershed Shrub tussock or treeline boundaries Seasonal snow cover Areal extent of the cryosphere