A5080346317- Atmospheric chemistry and aerosols
- Atmospheric Ozone and Climate
- Atmospheric and Environmental Gas Dynamics
- Atmospheric aerosols and clouds
- Air Quality and Health Impacts
- Vehicle emissions and performance
- Climate variability and models
- Mercury impact and mitigation studies
- Ionosphere and magnetosphere dynamics
- Meteorological Phenomena and Simulations
- Advanced Aircraft Design and Technologies
- Air Quality Monitoring and Forecasting
- Air Traffic Management and Optimization
- Toxic Organic Pollutants Impact
- Geophysics and Gravity Measurements
- Theoretical and Computational Physics
- Maritime Transport Emissions and Efficiency
- Catalytic Processes in Materials Science
- Solar and Space Plasma Dynamics
- Nuclear Physics and Applications
- Methane Hydrates and Related Phenomena
- Stochastic processes and statistical mechanics
- Material Dynamics and Properties
- Marine and coastal ecosystems
- Nuclear and radioactivity studies
Royal Netherlands Meteorological Institute
2014-2024
Delft University of Technology
2020-2021
NSF National Center for Atmospheric Research
2021
Eindhoven University of Technology
2001
Earth System Science Interdisciplinary Center
2000
Park University
2000
Ames Research Center
2000
University of Miami
1997
Utrecht University
1986-1987
University of Maryland, College Park
1987
Abstract. This paper describes the global chemistry Transport Model, version 5 (TM5) which allows two-way nested zooming. The model is used for studies require high resolution regionally but can work on a coarser globally. zoom algorithm introduces refinement in both space and time some predefined regions. Boundary conditions of region are provided by parent grid results area communicated back to parent. A case study using 222Rn measurements that were taken during MINOS campaign reveals...
Abstract. We present a comprehensive description and benchmark evaluation of the tropospheric chemistry version global transport model TM5 (Tracer Model 5, TM5-chem-v3.0). A full is given concerning photochemical mechanism, interaction with aerosol, treatment stratosphere, wet dry deposition parameterizations, applied emissions. evaluate against suite ground-based, satellite, aircraft measurements components critical for understanding photochemistry year 2006. The exhibits realistic...
Abstract. An airfreight container with automated instruments for measurement of atmospheric gases and trace compounds was operated on a monthly basis onboard Boeing 767-300 ER LTU International Airways during long-distance flights from 1997 to 2002 (CARIBIC, Civil Aircraft Regular Investigation the Atmosphere Based an Instrument Container, http://www.caribic-atmospheric.com). Subsequently more advanced system has been developed, using larger capacity additional equipment improved inlet...
Abstract. This paper describes the pre-operational analysis and forecasting system developed during MACC (Monitoring Atmospheric Composition Climate) continued in MACC-II Climate: Interim Implementation) European projects to provide air quality services for continent. is based on seven state-of-the art models run Europe (CHIMERE, EMEP, EURAD-IM, LOTOS-EUROS, MATCH, MOCAGE SILAM). These are used calculate multi-model ensemble products. The gives an overall picture of its status at end (summer...
Abstract. Natural methane (CH4) emissions from wet ecosystems are an important part of today's global CH4 budget. Climate affects the exchange between and atmosphere by influencing production, oxidation, transport in soil. The net depends on ecosystem hydrology, soil vegetation characteristics. Here, LPJ-WHyMe dynamical model is used to simulate for different ecosystems: northern peatlands (45°–90° N), naturally inundated wetlands (60° S–45° rice agriculture mineral soils. Mineral soils a...
Abstract. The development and application of chemistry transport models has a long tradition. Within the Netherlands LOTOS–EUROS model been developed by consortium institutes, after combining its independently predecessors in 2005. Recently, version 2.0 was released as an open-source version. This paper presents curriculum vitae system, describing model's history, philosophy, basic features validation with EMEP stations for new benchmark year 2012, cases most recent key developments. By...
Simulations of 222 Rn and other short‐lived tracers are used to evaluate intercompare the representations convective synoptic processes in 20 global atmospheric transport models. Results show that most established three‐dimensional models simulate vertical mixing troposphere within constraints offered by observed mean concentrations subgrid parameterization convection is essential for this purpose. However, none captures variability upper troposphere, reproduces high measured at 200 hPa over...
During LBA‐CLAIRE‐98, we found atmospheric layers with aged biomass smoke at altitudes >10 km over Suriname. CO, CO 2 , acetonitrile, methyl chloride, hydrocarbons, NO, O 3 and aerosols were strongly enhanced in these layers. We estimate that 80–95% of accumulation mode had been removed during convective transport. Trajectories show the plumes originated from large fires near Brazil/Venezuela border March 1998. This was entrained into deep convection northern Amazon, transported out...
In the Essence project a 17‐member ensemble simulation of climate change in response to SRES A1b scenario has been carried out using ECHAM5/MPI‐OM model. The relatively large size makes it possible accurately investigate changes extreme values variables. Here we focus on annual‐maximum 2m‐temperature and fit Generalized Extreme Value (GEV) distribution simulated development parameters this distribution. Over most land areas both location scale parameter increase. Consequently 100‐year return...
Abstract. To estimate the impact of emissions by road, aircraft and ship traffic on ozone OH in present-day atmosphere six different atmospheric chemistry models have been used. Based newly developed global emission inventories for data sets each model performed sensitivity simulations reducing transport sector 5%. The results indicate that annual average lower tropospheric responds most sensitive to (50.6%±10.9% total induced perturbation), followed road (36.7%±9.3%) exhausts (12.7%±2.9%),...
Abstract. African biomass burning emission inventories for gaseous and particulate species have been constructed at a resolution of 1 km by 1km with daily coverage the 2000–2007 period. These are higher than GFED2 inventories, which currently widely in use. Evaluation specifically focusing on combustion aerosol has carried out ORISAM-TM4 global chemistry transport model includes detailed module. This paper compares modeled results measurements surface BC concentrations scattering...
Abstract Despite their potential to slow global warming, until recently, the radiative forcing associated with volcanic aerosols in lowermost stratosphere (LMS) had not been considered. Here we study aerosol changes using lidar measurements from NASA CALIPSO satellite and aircraft IAGOS-CARIBIC observatory. Between 2008 2012 volcanism frequently affected Northern Hemisphere loadings, whereas Southern generally loadings close background conditions. We show that half of stratospheric optical...
Abstract. We have integrated the atmospheric chemistry and transport model TM5 into global climate EC-Earth version 2.4. present an overview of two-way data exchange between IFS from European Centre for Medium-Range Weather Forecasts (ECMWF), general circulation EC-Earth. In this paper we evaluate simulation tropospheric aerosols in a one-way coupled configuration. carried out decadal present-day conditions calculated chemical budgets climatologies tracer concentrations aerosol optical...
Abstract A data‐assimilation scheme to assimilate the Global Ozone Monitoring Experiment (GOME) total‐ozone data is described. The corresponding software (called TM3DAM) has been operational since early 2000 and used produce daily ozone analyses five‐day forecasts. model a tracer‐transport with parametrized description of stratospheric gas‐phase heterogeneous chemistry. It driven by meteorological fields from ECMWF numerical weather‐prediction model. TM3DAM near‐real‐time level‐2 GOME...
During July 1994, submicron aerosol size distributions were measured at two sites on Tenerife, Canary Islands. One station was located in the free troposphere (FT), other marine boundary layer (MBL). Transport toward these strongly decoupled: FT first affected by dust and sulfate‐laden air masses advecting from North Africa later clean originating over Atlantic, whereas MBL always subject to northeasterly trade wind circulation. In distribution predominantly monomodal with a geometric mean...
As part of the project INCA (Interhemispheric Differences in Cirrus Properties from Anthropogenic Emissions) two aircraft field campaigns have been performed to study aerosol and cirrus cloud properties upper troposphere (UT) midlatitudes southern hemisphere (SH) northern (NH). This paper focuses on measurements UT number concentrations tropospheric vertical profiles volatile refractory Aitken as well total accumulation mode particles. The results are discussed with respect interhemispheric...
Abstract Three‐dimensional ECMWF first‐guess wind fields at different horizontal (2.5° to 0.5°) and temporal (6h–3h) resolutions are used investigate the sensitivity of five‐day backward trajectories, computed with KNMI trajectory model, resolution data. This sensitivity, which is a measure for accuracy investigated two sets trajectories: (a) set starting in small‐scale flow pattern tropopause fold occurring over De Bilt (52° N, 5° E) on 1 November 1994; (b) large‐scale outside this folding...
Abstract. The emission of organic compounds from biogenic processes acts as an important source trace gases in remote regions away urban conurbations, and is likely to become more future decades due the further mitigation anthropogenic emissions that affect air quality climate forcing. In this study we examine contribution volatile (BVOCs) towards global tropospheric composition using 3-D chemistry transport model TM5 recently developed modified CB05 chemical mechanism. By comparing regional...
Abstract. Large volcanic eruptions impact significantly on climate and lead to ozone depletion due injection of particles gases into the stratosphere where their residence times are long. In this composition aerosol is an important but inadequately studied factor. Samples volcanically influenced were collected following Kasatochi (Alaska), Sarychev (Russia) also during Eyjafjallajökull (Iceland) in period 2008–2010. Sampling was conducted by CARIBIC platform regular flights at altitude 10–12...
Water vapour, relative humidity and temperature in the Northern Hemisphere extratropical upper troposphere/lowermost stratosphere (UT/LMS) of operational European Centre for Medium‐Range Weather Forecasts (ECMWF) analysis forecast system are compared with situ measurements from Civil Aircraft Regular Investigation atmosphere Based on an Instrument Container (CARIBIC) passenger aircraft flights between 2005 2012. Modelled observed temperatures found to be good agreement, a small tendency...
Nitrogen oxide (NO and NOy) measurements were performed onboard an in-service aircraft within the framework of CARIBIC (Civil Aircraft for Regular Investigation atmosphere Based on Instrument Container). A total 330 flights completed from May 2005 through April 2013 between Frankfurt/Germany destination airports in Canada, USA, Brazil, Venezuela, Chile, Argentina, Colombia, South Africa, China, Korea, Japan, India, Thailand, Philippines. Different regions show differing NO NOy mixing ratios....
Abstract. The trend and interannual variability of methane sources are derived from multi-annual simulations tropospheric photochemistry using a 3-D global chemistry-transport model. Our semi-inverse analysis uses the fifteen years (1979--1993) re-analysis ECMWF meteorological data annually varying emissions including photo-chemistry, in conjunction with observed CH4 concentration distributions trends NOAA-CMDL surface stations. Dividing world four zonal regions (45--90 N, 0--45 S, 45--90 S)...
Airborne in situ measurements of NO, NO 2 , y CO, CO O 3 J (NO ), and CN were performed European thunderstorms during the field experiment EULINOX July 1998. The upper troposphere show enhanced x (= + ) concentrations within their outflow at horizontal scales from 300 m to several 100 km. maximum mixing ratio measured inside a thundercloud close lightning (the aircraft was also hit by small strike) 25 ppbv. A regional enhancement 0.5 ppbv over central Europe could be traced back thunderstorm...