Modeling the Earth System [climatology]

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In this topic we concentrate on joint analysis of gravity, seismic and other geophysical, geodetic and geological data aiming for construction of comprehensive models of the lithosphere and underlying mantle and finding a connection of these models with ongoing tectonic processes and geodynamics.

We use observations and numerical simulations to understand the dynamics of the large ice sheets of Greenland and Antarctica in the past and predict their dynamics in the future. A particular focus is on the mass balance of these ice sheets, since it has a direct impact on the global sea level. Interactions of the ice sheets with the ocean, the atmosphere and the solid earth play a key role in understanding their dynamics and for meaningful modeling. In this topic, we consider the solid earth response to mass redistributions at its surface in relation to geodynamic and geophysical problems like climate, ocean and ice-sheet dynamics.

The focus is numerical modelling of instantaneous to long-term processes of ten thousand years and more. About us. Toggle Navigation.

The Global Ocean in the DOE Energy Exascale Earth System Model (E3SM)

Departments Geodesy Geophysics Geochemistry Geosystems. International International Office Geo. Central Research Topics I.

Studying and Projecting Climate Change with Earth System Models | Learn Science at Scitable

Global Processes II. Natural Hazards V. Georesources and Geoenergy. Section 1.

climate models and weather forecasts

Our research falls into four categories. E3SM inherited two different radiative Terrestrial ecosystem carbon C , nitrogen N , and phosphorus P cycling processes are strongly modulated by the climate and they also generate significant feedbacks to the climate system and play important roles in the changing climate.

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Global ecosystem models currently predict that the Amazon rainforest will continue to act as a carbon sink in the future due to rising atmospheric carbon dioxide CO2 concentrations, effectively enhancing ecosystem resilience and reducing the pace of climate change. However, the uncertainty of Trend, detection, and attribution analyses were performed using naturalized streamflow observations and routed land surface model runoff for 10 subbasins in the Columbia River Basin CRB during water years — In some regions of Earth's oceans, warm, relatively fresh surface waters are separated from cold deep water by a layer of warm but relatively salty water - termed a barrier layer.

This work, focussing on E3SM, is the first global assessment of barrier layers in Earth system models. Causes and The role of phosphorus availability has not been considered in any of the CMIP5 models. This study shows that phosphorus availability could greatly reduce the projected CO2-induced carbon sink in Amazon rainforests. This study suggests that the Amazon rainforest responses to increasing atmospheric Algorithms and software were developed to solve a key challenge, property preservation, in modeling atmospheric transport of trace constituent species, such as water vapor, trace gases, and aerosols.

Our research falls into four categories

These methods will speed up global climate models. We improved the fidelity of surface-atmosphere longwave radiation coupling over Sahara and Sahel region in the climate model. We showed such improvement can affect simulated climate, regional and beyond. A set of algorithms based on characteristic discontinuous Galerkin methods is presented for tracer transport on the sphere.

The algorithms are designed to reduce MPI communication volume per unit of simulated time relative to current methods generally and to the spectral element scheme employed by Following deforestation, ET is typically observed to decrease substantially as a consequence of decreases in leaf area and roots and increases in runoff. Changes in ET latent heat flux Snow is an important climate regulator because it greatly increases the surface albedo of middle and high latitudes of the Earth.

Develop improved and more comprehensive Earth System Models

Earth system models ESMs often adopt two-stream approximations with different radiative transfer techniques, the same snow therefore has different solar radiative Over the past several decades, the land modeling community has recognized the importance of nutrient regulation on the global terrestrial carbon cycle. Global terrestrial models currently predict that the Amazon rainforest will continue to act as a carbon sink in the future, primarily owing to the rising atmospheric carbon dioxide CO2 concentration.

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Soil phosphorus impoverishment in parts of the Amazon basin largely controls its functioning, but Ocean barrier layers BLs separate the mixed layer from the top of the thermocline, and are able to insulate the mixed layer from entrainment of cold thermocline water. Compared to observations, models