A5051675276- Climate change and permafrost
- Atmospheric and Environmental Gas Dynamics
- Cryospheric studies and observations
- Fire effects on ecosystems
- Methane Hydrates and Related Phenomena
- Geology and Paleoclimatology Research
- Arctic and Antarctic ice dynamics
- Geological Studies and Exploration
- Climate variability and models
- Atmospheric chemistry and aerosols
- Plant Water Relations and Carbon Dynamics
- Landslides and related hazards
- demographic modeling and climate adaptation
- Geographic Information Systems Studies
- 3D Modeling in Geospatial Applications
- Soil and Unsaturated Flow
- Aeolian processes and effects
- Meteorological Phenomena and Simulations
- Vehicle emissions and performance
- Plant responses to elevated CO2
- Historical and Architectural Studies
- Fire dynamics and safety research
- Offshore Engineering and Technologies
- Risk and Safety Analysis
- Science and Climate Studies
Max Planck Institute for Meteorology
2014-2024
Universität Hamburg
2005-2021
Max Planck Society
2015-2021
A new release of the Max Planck Institute for Meteorology Earth System Model version 1.2 (MPI-ESM1.2) is presented. The development focused on correcting errors in and improving physical processes representation, as well computational performance, versatility, overall user friendliness. In addition to radiation aerosol parameterizations atmosphere, several relatively large, but partly compensating, coding model's cloud, convection, turbulence were corrected. representation land was refined...
In this study, components of the Max Planck Institute Earth System Model were used to explore how changes in lightning induced by climate change alter wildfire activity. To investigate alters global flash frequency, simulations with atmospheric general circulation model ECHAM6 performed for time periods preindustrial, present‐day, and three future scenarios. The effect activity on fire occurrence was derived from land surface vegetation JSBACH. Global cloud‐to‐ground decreased 3.3% under...
Abstract. Global vegetation models traditionally treat anthropogenic land-use and land-cover changes (LULCCs) only as the in cover seen from one year to next (net transitions). This approach ignores subgrid-scale processes such shifting cultivation which do not affect net distribution but have an impact on carbon budget. The differences stocks feed back like wildfires desert formation. simulations for Coupled Model Intercomparison Project Phase 5 (CMIP5) all describe LULCCs using "Land-Use...
Abstract. The current generation of Earth system models exhibits large inter-model differences in the simulated climate Arctic and subarctic zone, with model structure parametrizations being one main sources uncertainty. One particularly challenging aspect modelling is representation terrestrial processes permafrost-affected regions, which are often governed by spatial heterogeneity far below resolution models' land surface components. Here, we use Max Planck Institute (MPI) System Model to...
Abstract. We use the global circulation model ECHAM6 extended by aerosol module HAM2 to simulate patterns in wildfire emission heights. Prescribed plume heights are replaced an implementation of a simple, semi-empirical height parametrization. In first step, performance parametrization is evaluated for plumes reported Multiangle Imaging Spectroradiometer (MISR) Plume Height Project (MPHP) data set. Our results show that simulates largely reasonable distribution While modeled mean (1411 ± 646...
Abstract. Most earth system models (ESMs) neglect climate feedbacks arising from carbon release thawing permafrost, especially of subsea permafrost (SSPF). To assess the fate SSPF in next 1000 years, we implemented into JSBACH, land component Max Planck Institute Earth System Model (MPI-ESM). This is first implementation processes an ESM component. We investigate three extended scenarios 6th phase Coupled Intercomparison Project (CMIP6). In 21st century only small differences are found among...
Abstract. Global vegetation models traditionally treat anthropogenic land use and cover changes (LULCC) only as the in seen from one year to next (net transitions). This approach ignores sub-grid-scale processes such shifting cultivation which do not affect net distribution but have an impact on carbon budget. The simulations for Coupled Model Intercomparison Project Phase 5 (CMIP5) all describe LULCC using Harmonized Land-Use Protocol. Though this protocol describes (gross transitions),...
Abstract. As one of the first transcontinental polities that led to widespread anthropogenic modification environment, influence Roman Empire on European climate has been studied for more than 20 years. Recent advances in our understanding past land use and aerosol–climate interactions make it valuable revisit way humans may have affected era. Here we estimate effect some variables at its apogee, focusing impact cover aerosol emissions. For this combined existing scenarios with novel...
Sea-level rise submerges terrestrial permafrost in the Arctic, turning it into subsea permafrost. Subsea underlies ~ 1.8 million km2 of Arctic continental shelf, with thicknesses places exceeding 700 m. variations over glacial-interglacial cycles control distribution and thickness, yet no model has accounted for glacial isostatic adjustment (GIA), which deviates local sea level from global mean due to changes ice ocean loading. Here we incorporate GIA a pan-Arctic last 400,000 years....
Abstract. Changes in fire activity over the last 8000 years are simulated with a global model driven by changes climate and vegetation cover. The were separated into those caused through variations fuel availability, moisture or wind speed, which react differently to climate. Disentangling these controlling factors helps understanding overall control on Holocene. Globally burned area is increase 2.5% between 200 cal yr BP, larger regional compensating nearly evening out scale. Despite...
A simple two‐layer channel model with a topographic barrier is used to study the response of overflows across Greenland‐Scotland Ridge changes in available volume deep and intermediate waters Nordic Seas. Hydraulic control determines exchange through different gaps ridge while geostrophic balance north provides respective upstream conditions. In overflow Denmark Strait more sensitive water supply than that Faeroe‐Bank Channel, but no sudden breakdown exchanges seen when decreases. Transport...
Abstract. Most Earth System Models (ESMs) neglect climate feedbacks arising from carbon release thawing permafrost, especially of sub-sea permafrost (SSPF). To assess the fate SSPF in next 1000 years, we implemented into JSBACH, land component Max Planck Institute Model (MPI-ESM). This is first implementation processes an ESM-component. We investigate three extended scenarios 6th phase Coupled Intercomparison Project (CMIP6). In 21st century only small differences are found among scenarios,...
Abstract In global fire models, lightning is typically prescribed from observational data with monthly mean temporal resolution while meteorological forcings, such as precipitation or temperature, are in a daily resolution. this study, we investigate the importance of forcing for simulation burned area by varying to and annual forcing. For this, utilize vegetation model JSBACH‐SPITFIRE simulate area, forced derived general circulation ECHAM6. On scale, differences caused applied coarser stay...
Abstract. We use the global circulation model ECHAM6 extended by aerosol module HAM2 to simulate patterns in wildfire emission heights. Prescribed plume heights are replaced an implementation of a simple, semi-empirical height parametrization. In first step, performance parametrization is evaluated for plumes reported MISR Plume Height Project data set. Our results show that simulates largely reasonable distribution While modeled mean (1411±646 m) good agreement with observed (1382±702 m),...
Abstract The current generation of Earth system models exhibits large inter-model differences in the simulated climate Arctic and subarctic zone, with model structure parametrizations being one main sources uncertainty. One particularly challenging aspect modelling is representation terrestrial processes permafrost-affected regions, which are often governed by spatial heterogeneity far below resolution models' land surface components. Here, we use MPI System to investigate how different...
Sea-level rise submerges terrestrial permafrost in the Arctic, turning it into subsea permafrost. Subsea underlies ∼1.8 million km^2 of Arctic continental shelf, with thicknesses places exceeding 700 m. variations over glacial-interglacial cycles control distribution and thickness, yet no model has accounted for glacial isostatic adjustment (GIA), which deviates local sea level from global mean due to changes ice ocean loading. We incorporate GIA a pan-Arctic last 400,000 years. Including...
Abstract. Changes in fire activity over the last 8000 years are simulated with a global model driven by changes climate and vegetation cover. The were separated into those caused through variations fuel availability, moisture or wind speed which react differently to climate. Disentangling these controlling factors helps understand overall control on Holocene. Globally burned area is increase 2.5% between 200 cal yr BP larger regional compensating scale. Despite absence of anthropogenic...
Abstract. The current generation of Earth system models exhibits large inter-model differences in the simulated climate Arctic and subarctic zone, with model structure parametrizations being one main sources uncertainty. One particularly challenging aspect modelling is representation terrestrial processes permafrost-affected regions, which are often governed by spatial heterogeneity far below resolution models' land surface components. Here, we use MPI System to investigate how different...
Abstract. As one of the first transcontinental polities that led to widespread anthropogenic modification environment, influence Roman Empire on European climate has been studied for more than 20 years. Recent advances in our understanding past land use and aerosol-climate interactions make it valuable revisit way humans may have affected Era. Here we drive global aerosol-enabled model ECHAM-HAM-SALSA with maps novel estimates aerosol emissions from at its apogee quantify effect regional...