Publications

Drought impact on forest carbon dynamics and fluxes in Amazonia

Publication ID: pub.1022663778

Publication date: 04/03/2015

Keywords: Amazon Forest; Brazil; Carbon; Carbon Dioxide; Cell Respiration; Droughts; Forests; Photosynthesis; South America; Trees; Tropical Climate

Severe drought in a tropical forest ecosystem suppresses photosynthetic carbon uptake and plant maintenance respiration, but growth is maintained, suggesting that, overall, less carbon is available for tree tissue maintenance and defence, which may cause the subsequent observed increase in tree mortality.

Optimal stomatal behaviour around the world

Publication ID: pub.1021327635

Publication date: 02/03/2015

Keywords: Biomes; Carbon Cycle; Changing Climate; Ecohydrologcial Processes; Ecosystem Productivity; Energy Balance; Evapotranspiration; Global; Model; Photosynthesis; Stomatal Conductance; Transpiration

Stomatal conductance is a land-surface attribute that links the water and carbon cycles. Analysis of a global database covering a wide range of plant functional types and biomes now provides a framework for predicting the behaviour of stomatal conductance that can be applied to model ecosystem productivity, energy balance and ecohydrological processes in a changing […]

Multi-objective Optimization of Different Management Scenarios to Control Seawater Intrusion in Coastal Aquifers

Publication ID: pub.1029914177

Publication date: 29/01/2015

Keywords: Management Scenarios; Multi-objective Genetic Algorithm; Seawater Intrusion; Simulation-optimization; Treated Wastewater

Seawater intrusion (SWI) is a widespread environmental problem, particularly in arid and semi-arid coastal areas. Therefore, appropriate management strategies should be implemented in coastal aquifers to control SWI with acceptable limits of economic and environmental costs. This paper presents the results of an investigation on the efficiencies of different management scenarios for controlling saltwater intrusion […]

Nonlinear regional warming with increasing CO2 concentrations

Publication ID: pub.1037676697

Publication date: 26/01/2015

Keywords: Adaptation and Mitigation; Analysis Methods; Climate Change; Climate Models; CO2 Concentrations; Forcings; Global; Nonlinear Regional Warming

Knowledge of how climate change will affect temperatures on a regional scale is needed for effective planning and preparedness. This study uses five climate models to investigate regional warming. It shows that warming is nonlinear for doublings of atmospheric CO2 and that nonlinearity increases with higher CO2 concentrations.

Volcanic ash layer depth: Processes and mechanisms

Publication ID: pub.1018094723

Publication date: 26/01/2015

Keywords: Ash Sedimentation; Ash Size Distribution; Europe; Turbulent Mixing; Vertical Wind Shear

The long duration of the 2010 Eyjafjallajökull eruption provided a unique opportunity to measure a widely dispersed volcanic ash cloud. Layers of volcanic ash were observed by the European Aerosol Research Lidar Network with a mean depth of 1.2 km and standard deviation of 0.9 km. In this paper we evaluate the ability of the […]

Increased frequency of extreme La Niña events under greenhouse warming

Publication ID: pub.1050620869

Publication date: 26/01/2015

Keywords: Central Pacific; Coupled Model Intercomparison Project Phase 5; Disruption of Weather Patterns; El Niño/Southern Oscillation (ENSO); Extreme; Frequency; Greenhouse Warming; Interannual Climate Variability; La Niña; Maritime Continent; Projected; Temperature Gradients

Extreme La Niña events occur when cold sea surface temperatures across the central Pacific Ocean create a strong temperature gradient to the Maritime continent in the west. This work projects an increase in frequency of La Niña events due to faster land warming relative to the ocean, and a greater chance of them occurring following […]