A5008074499- Atmospheric chemistry and aerosols
- Atmospheric Ozone and Climate
- Atmospheric and Environmental Gas Dynamics
- Air Quality and Health Impacts
- Atmospheric aerosols and clouds
- Air Quality Monitoring and Forecasting
- Climate Change and Geoengineering
- Vehicle emissions and performance
- Climate variability and models
- COVID-19 impact on air quality
- Cryospheric studies and observations
- Climate Change Policy and Economics
- Spaceflight effects on biology
- Space exploration and regulation
- Meteorological Phenomena and Simulations
- Sustainability and Climate Change Governance
- Climate Change and Health Impacts
- Indoor Air Quality and Microbial Exposure
- Climate Change Communication and Perception
- Radioactivity and Radon Measurements
- Plant responses to elevated CO2
- Marine and coastal ecosystems
- Energy and Environment Impacts
- Lightning and Electromagnetic Phenomena
- Maritime Transport Emissions and Efficiency
Research Institute for Sustainability at GFZ
2015-2024
Romblon State University
2024
University of Potsdam
2017-2023
University of Freiburg
2021
Tyndall Centre
2021
University of East Anglia
2021
Lund University
2021
Max Planck Institute for Chemistry
2007-2016
Andritz (Austria)
2016
Potsdam Institute for Climate Impact Research
2012-2015
Global tropospheric ozone distributions, budgets, and radiative forcings from an ensemble of 26 state‐of‐the‐art atmospheric chemistry models have been intercompared synthesized as part a wider study into both the air quality climate roles ozone. Results three 2030 emissions scenarios, broadly representing “optimistic,” “likely,” “pessimistic” options, are compared to base year 2000 simulation. This case realistically represents current global distribution A further set simulations considers...
We use 23 atmospheric chemistry transport models to calculate current and future (2030) deposition of reactive nitrogen (NO y , NH x ) sulfate (SO land ocean surfaces. The are driven by three emission scenarios: (1) air quality legislation (CLE); (2) an optimistic case the maximum emissions reductions currently technologically feasible (MFR); (3) contrasting pessimistic IPCC SRES A2 scenario. An extensive evaluation present‐day using nearly all information on wet available worldwide shows a...
The relative humidity (RH) and the dewpoint temperature (td) are two widely used indicators of amount moisture in air. exact conversion from RH to td, as well highly accurate approximations, too complex be done easily without help a calculator or computer. However, there is very simple rule thumb that can useful for approximating moist air (RH > 50%), which does not appear known by meteorological community: td decreases about 1°C every 5% decrease (starting at td= t, dry bulb temperature,...
The Mediterranean Intensive Oxidant Study, performed in the summer of 2001, uncovered air pollution layers from surface to an altitude 15 kilometers. In boundary layer, standards are exceeded throughout region, caused by West and East European north. Aerosol particles also reduce solar radiation penetration surface, which can suppress precipitation. middle troposphere, Asian a lesser extent North American is transported west. Additional east, monsoon upper crosses tropopause, pollutes lower...
The Indian Ocean Experiment (INDOEX) was an international, multiplatform field campaign to measure long-range transport of air pollution from South and Southeast Asia toward the during dry monsoon season in January March 1999. Surprisingly high levels were observed over entire northern Intertropical Convergence Zone at about 6°S. We show that agricultural burning especially biofuel use enhance carbon monoxide concentrations. Fossil fuel combustion biomass cause a aerosol loading. growing...
Analysis of downwind plume evolution using satellite observations can be used for air pollution estimates.
Abstract. Bacteria are ubiquitous in the atmosphere, with concentrations of bacterial cells typically exceeding 1×104 m−3 over land. Numerous studies have suggested that presence bacteria atmosphere may impact cloud development, atmospheric chemistry, and microbial biogeography. A sound knowledge distributions is needed to evaluate these claims. This review focusses on published measurements total culturable aerosol. We discuss emission mechanisms impacts meteorological conditions...
Abstract. The new Modular Earth Submodel System (MESSy) describes atmospheric chemistry and meteorological processes in a modular framework, following strict coding standards. It has been coupled to the ECHAM5 general circulation model, which slightly modified for this purpose. A 90-layer model version up 0.01 hPa was used at T42 resolution (~2.8 latitude longitude) simulate lower middle atmosphere. meteorology tested check influence of changes radiation interactions with representation...
Air quality, ecosystem exposure to nitrogen deposition, and climate change are intimately coupled problems: we assess changes in the global atmospheric environment between 2000 2030 using 26 state-of-the-art chemistry models three different emissions scenarios. The first (CLE) scenario reflects implementation of current air quality legislation around world, while second (MFR) represents a more optimistic case which all currently feasible technologies applied achieve maximum emission...
In this study, we present the results of nitrogen deposition on land from a set 29 simulations six different tropospheric chemistry models pertaining to present‐day and 2100 conditions. Nitrogen refers here (wet dry) all nitrogen‐containing gas phase chemical species resulting NO x (NO + 2 ) emissions. We show that under assumed IPCC SRES A2 scenario global annual average over is expected increase by factor ∼2.5, mostly because in This will significantly expand areas with exceeding 1 gN/m...
We analyze present‐day and future carbon monoxide (CO) simulations in 26 state‐of‐the‐art atmospheric chemistry models run to study air quality climate change. In comparison with near‐global satellite observations from the MOPITT instrument local surface measurements, show large underestimates of Northern Hemisphere (NH) extratropical CO, while typically performing reasonably well elsewhere. The results suggest that year‐round emissions, probably fossil fuel burning east Asia seasonal...
Abstract. Ice nuclei impact clouds, but their sources and distribution in the atmosphere are still not well known. Particularly little attention has been paid to IN marine environments, although evidence from field studies suggests that populations remote regions may be dominated by primary biogenic particles associated with sea spray. In this exploratory model study, we aim bring long-neglected topic identify promising target for future campaigns. We assess likely global of ice using a...
Abstract. Bacteria are constantly being transported through the atmosphere, which may have implications for human health, agriculture, cloud formation, and dispersal of bacterial species. We simulate global transport bacteria, represented as 1 μm 3 diameter spherical solid particle tracers in a general circulation model. investigate factors influencing residence time distribution particles, including emission region, condensation nucleus activity removal by ice-phase precipitation. The...
<strong class="journal-contentHeaderColor">Abstract.</strong> We present a suite of new climate model experiment designs for the Geoengineering Model Intercomparison Project (GeoMIP). This set experiments, named GeoMIP6 (to be consistent with Coupled Phase 6), builds on previous GeoMIP project simulations, and has been expanded to address several further important topics, including key uncertainties in extreme events, use geoengineering as part portfolio responses change, relatively idea...
Solar geoengineering has been proposed as a means to cool the Earth by increasing reflection of sunlight back space, for example, injecting reflective aerosol particles (or their precursors) into lower stratosphere. Such techniques would not be able substitute mitigation greenhouse gas (GHG) emissions response risks climate change, they only mask some effects global warming. They might, however, eventually applied complementary approach reduce risks. Thus, system consequences solar are...