Michael Weimer
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View article: The Atmospheric Composition Component of the ICON modeling framework: ICON-ART version 2025.04
The Atmospheric Composition Component of the ICON modeling framework: ICON-ART version 2025.04 Open
Accurate and efficient modeling of atmospheric composition, including aerosols and trace gases and their interactions with radiation, clouds, and dynamics is essential for improving predictions of air quality, weather, climate, and related…
View article: A study of measurement scenarios for the future CO2M mission: avoidance of detector saturation and the impact on XCO<sub>2</sub> retrievals
A study of measurement scenarios for the future CO2M mission: avoidance of detector saturation and the impact on XCO<sub>2</sub> retrievals Open
The direct and indirect release of carbon dioxide (CO2) by human activities into the atmosphere has been the main driver of anthropogenic climate change since the industrial revolution. The Paris Agreement from 2015 requires regular countr…
View article: Implementation of Sub‐Grid Scale Temperature Perturbations Induced by Non‐Orographic Gravity Waves in WACCM6
Implementation of Sub‐Grid Scale Temperature Perturbations Induced by Non‐Orographic Gravity Waves in WACCM6 Open
Atmospheric gravity waves can play a significant role on atmospheric chemistry through temperature fluctuations. A recent modeling study introduced a method to implement subgrid‐scale orographic gravity‐wave‐induced temperature perturbatio…
View article: Reply on RC1
Reply on RC1 Open
View article: A study of measurement scenarios for the future CO2M mission: avoidance of detector saturation and the impact on XCO2 retrievals
A study of measurement scenarios for the future CO2M mission: avoidance of detector saturation and the impact on XCO2 retrievals Open
The human direct and indirect release of carbon dioxide (CO2) into the atmosphere is the main driver of the anthropogenic change in climate since the industrial revolution. The Paris agreement from 2015 requires regular country-based repor…
View article: Retrieving the atmospheric concentrations of carbon dioxide and methane from the European Copernicus CO2M satellite mission using artificial neural networks
Retrieving the atmospheric concentrations of carbon dioxide and methane from the European Copernicus CO2M satellite mission using artificial neural networks Open
Carbon dioxide (CO2) and methane (CH4) are the most important anthropogenic greenhouse gases and the main drivers of climate change. Monitoring their concentrations from space helps detect and quantify anthropogenic emissions, supporting t…
View article: Retrieving the atmospheric concentrations of carbon dioxide and methane from the European Copernicus CO2M satellite mission using artificial neural networks
Retrieving the atmospheric concentrations of carbon dioxide and methane from the European Copernicus CO2M satellite mission using artificial neural networks Open
Carbon dioxide (CO2) and methane (CH4) are the most important anthropogenic greenhouse gases and the main drivers of climate change. Monitoring their concentrations from space helps to detect and quantify anthropogenic emissions, supportin…
View article: Towards a sector-specific CO∕CO <sub>2</sub> emission ratio: satellite-based observations of CO release from steel production in Germany
Towards a sector-specific CO∕CO <sub>2</sub> emission ratio: satellite-based observations of CO release from steel production in Germany Open
Global crude steel production is expected to continue to increase in the coming decades to meet the demands of the growing world population. Currently, the dominant steelmaking technology worldwide is the conventional highly CO2-intensive …
View article: Greenhouse gas retrievals for the CO2M mission using the FOCAL method: first performance estimates
Greenhouse gas retrievals for the CO2M mission using the FOCAL method: first performance estimates Open
The Anthropogenic Carbon Dioxide Monitoring (CO2M) mission is a constellation of satellites currently planned to be launched in 2026. CO2M is planned to be a core component of a Monitoring and Verification Support (MVS) service capacity un…
View article: A data-driven method to retrieve XCO2 and XCH4 using artificial neural networks in preparation for the European Copernicus CO2 Monitoring Mission CO2M
A data-driven method to retrieve XCO2 and XCH4 using artificial neural networks in preparation for the European Copernicus CO2 Monitoring Mission CO2M Open
Carbon dioxide (CO2) and methane (CH4) are the most important anthropogenic greenhouse gases because they are the main drivers of climate change. Monitoring their concentrations from space can help to detect and quantify anthropogenic emis…
View article: Towards CO2 emission monitoring from space using FOCAL XCO2 retrievals of OCO-3 satellite measurements
Towards CO2 emission monitoring from space using FOCAL XCO2 retrievals of OCO-3 satellite measurements Open
Anthropogenic emissions of carbon dioxide (CO2) are the main driver of the change in climate since the industrial revolution. Policy mitigation strategies include reduction of these emissions. The Paris Agreement from 2015 requires the sta…
View article: Comment on egusphere-2023-2709
Comment on egusphere-2023-2709 Open
Abstract. Global crude steel production is expected to continue to increase in the coming decades to meet the demands of the growing world population. Currently, the dominant steelmaking technology worldwide is the convent…
View article: Towards a sector-specific CO/CO <sub>2</sub> emission ratio: Satellite-based observation of CO release from steel production in Germany
Towards a sector-specific CO/CO <sub>2</sub> emission ratio: Satellite-based observation of CO release from steel production in Germany Open
Global crude steel production is expected to continue to increase in the coming decades to meet the demands of the growing world population. Currently, the dominant steelmaking technology worldwide is the conventional highly CO2-intensive …
View article: Greenhouse Gas Retrievals for the CO2M mission using the FOCAL method: First Performance Estimates
Greenhouse Gas Retrievals for the CO2M mission using the FOCAL method: First Performance Estimates Open
The Anthropogenic Carbon Dioxide Monitoring (CO2M) mission is a constellation of satellites currently planned to be launched in 2026. CO2M is planned to be a core component of a Monitoring and Verification Support (MVS) service capacity un…
View article: A Method for Estimating Global Subgrid‐Scale Orographic Gravity‐Wave Temperature Perturbations in Chemistry‐Climate Models
A Method for Estimating Global Subgrid‐Scale Orographic Gravity‐Wave Temperature Perturbations in Chemistry‐Climate Models Open
Many chemical processes depend non‐linearly on temperature. Gravity‐wave‐induced temperature perturbations have been shown to affect atmospheric chemistry, but accounting for this process in chemistry‐climate models has been a challenge be…
View article: Approximation and Optimization of Global Environmental Simulations with Neural Networks
Approximation and Optimization of Global Environmental Simulations with Neural Networks Open
Solving a system of hundreds of chemical differential equations in environmental simulations has a major computational complexity, and thereby requires high performance computing resources, which is a challenge as the spatio-temporal resol…
View article: Effects of denitrification on the distributions of trace gas abundances in the polar regions: a comparison of WACCM with observations
Effects of denitrification on the distributions of trace gas abundances in the polar regions: a comparison of WACCM with observations Open
Polar stratospheric clouds (PSCs) play a key role in the polar chemistry of the stratosphere. Nitric acid trihydrate (NAT) particles have been shown to lead to denitrification of the lower stratosphere. While the existence of large NAT par…
View article: Reply on RC2
Reply on RC2 Open
Abstract. Polar stratospheric clouds (PSCs) play a key role in the polar chemistry of the stratosphere. Nitric acid trihydrate (NAT) particles have been shown to lead to denitrification of the lower stratosphere. While the…
View article: Reply on RC1
Reply on RC1 Open
Abstract. Polar stratospheric clouds (PSCs) play a key role in the polar chemistry of the stratosphere. Nitric acid trihydrate (NAT) particles have been shown to lead to denitrification of the lower stratosphere. While the…
View article: Beyond ozone hole impacts: Seamless composition-climate interactions explored with ICON-ART
Beyond ozone hole impacts: Seamless composition-climate interactions explored with ICON-ART Open
The ICOsahedral Non-hydrostatic (ICON) modelling system was originally developed by DWD and MPI-M for a range of weather (forecast) and climate applications. An Aerosols and Reactive Tracers (ART) module was added by KIT to enable a compre…
View article: Effects of denitrification on the distributions of trace gas abundances in the polar regions: Comparison of the Whole Atmosphere Community Climate Model with observations
Effects of denitrification on the distributions of trace gas abundances in the polar regions: Comparison of the Whole Atmosphere Community Climate Model with observations Open
Polar stratospheric clouds (PSCs) play a key role in the polar chemistry of the stratosphere. Nitric acid trihydrate (NAT) particles have been shown to lead to denitrification of the lower stratosphere. While the existence of large NAT par…
View article: Approximation and Optimization of Atmospheric Simulations in High Spatio-Temporal Resolution with Neural Networks
Approximation and Optimization of Atmospheric Simulations in High Spatio-Temporal Resolution with Neural Networks Open
Accurate forecasts of the atmosphere demand large-scale simulations with high spatio-temporal resolution. Atmospheric chemistry modeling, for example, usually requires solving a system of hundreds of coupled ordinary partial differential e…
View article: Effects of denitrification on the distributions of trace gas abundances in the polar regions: a model-data comparison
Effects of denitrification on the distributions of trace gas abundances in the polar regions: a model-data comparison Open
Polar stratospheric clouds (PSCs) play a key role in the polar chemistry of the stratosphere. Nitric acid trihydrate (NAT) particles have been shown to lead to denitrification of the lower stratosphere. While the existence of large NAT par…
View article: Supplementary material to "Effects of denitrification on the distributions of trace gas abundances in the polar regions: a model-data comparison"
Supplementary material to "Effects of denitrification on the distributions of trace gas abundances in the polar regions: a model-data comparison" Open
View article: A method for estimating global subgrid-scale gravity-wave temperature perturbations in chemistry-climate models
A method for estimating global subgrid-scale gravity-wave temperature perturbations in chemistry-climate models Open
Many chemical processes depend non-linearly on temperature. Gravity-wave-induced temperature perturbations have been previously shown to affect atmospheric chemistry, but accounting for this process in chemistry-climate models has been a c…
View article: Challenge of modelling GLORIA observations of upper troposphere–lowermost stratosphere trace gas and cloud distributions at high latitudes: a case study with state-of-the-art models
Challenge of modelling GLORIA observations of upper troposphere–lowermost stratosphere trace gas and cloud distributions at high latitudes: a case study with state-of-the-art models Open
Water vapour and ozone are important for the thermal and radiative balance of the upper troposphere (UT) and lowermost stratosphere (LMS). Both species are modulated by transport processes. Chemical and microphysical processes affect them …
View article: Comment on acp-2021-574
Comment on acp-2021-574 Open
Water vapour and ozone are important for the thermal and radiative balance of the upper troposphere (UT) and lowermost stratosphere (LMS). Both species are modulated by transport processes. Chemical and microphysical processes affect them …
View article: Challenge of modelling GLORIA observations of UT/LMS trace gas and cloud distributions at high latitudes: a case study with state-of-the-art models
Challenge of modelling GLORIA observations of UT/LMS trace gas and cloud distributions at high latitudes: a case study with state-of-the-art models Open
Water vapour and ozone are important for the thermal and radiative balance of the upper troposphere (UT) and lowermost stratosphere (LMS). Both species are modulated by transport processes. Chemical and microphysical processes affect them …
View article: Mountain-wave-induced polar stratospheric clouds and their representation in the global chemistry model ICON-ART
Mountain-wave-induced polar stratospheric clouds and their representation in the global chemistry model ICON-ART Open
Polar stratospheric clouds (PSCs) are a driver for ozone depletion in the lower polar stratosphere. They provide surface for heterogeneous reactions activating chlorine and bromine reservoir species during the polar night. The large-scale …
View article: Modeling methane from the North Sea region with ICON-ART
Modeling methane from the North Sea region with ICON-ART Open
<p>Methane (CH<sub>4</sub>) is the second most important greenhouse gas after CO<sub>2</sub> affecting global warming. Various sources (e.g. fossil fuel production, agriculture and waste, biomass burning and n…