Nicolas Bellouin
A5042660117- Atmospheric chemistry and aerosols
- Atmospheric aerosols and clouds
- Atmospheric Ozone and Climate
- Atmospheric and Environmental Gas Dynamics
- Climate variability and models
- Air Quality and Health Impacts
- Advanced Aircraft Design and Technologies
- Meteorological Phenomena and Simulations
- Climate Change Policy and Economics
- Vehicle emissions and performance
- Aeolian processes and effects
- Air Traffic Management and Optimization
- Radiative Heat Transfer Studies
- Climate Change and Geoengineering
- Cryospheric studies and observations
- Geophysics and Gravity Measurements
- Air Quality Monitoring and Forecasting
- Particle Dynamics in Fluid Flows
- Geological and Geophysical Studies
- Plant responses to elevated CO2
- Ionosphere and magnetosphere dynamics
- Plant Water Relations and Carbon Dynamics
- Gas Dynamics and Kinetic Theory
- Aviation Industry Analysis and Trends
- Icing and De-icing Technologies
University of Reading
2016-2025
Institut Pierre-Simon Laplace
2022-2025
Sorbonne Université
2022-2025
Centre National de la Recherche Scientifique
2003-2025
National Institute of Meteorology
2019-2024
Laboratoire de Météorologie Dynamique
2022
University of Cambridge
2021
University of Maryland, Baltimore County
2020
Met Office
2006-2015
Laboratoire d'Optique Atmosphérique
2003-2005
Abstract Black carbon aerosol plays a unique and important role in Earth's climate system. is type of carbonaceous material with combination physical properties. This assessment provides an evaluation black‐carbon forcing that comprehensive its inclusion all known relevant processes quantitative providing best estimates uncertainties the main terms: direct solar absorption; influence on liquid, mixed phase, ice clouds; deposition snow ice. These effects are calculated models, but when...
Abstract. We describe here the development and evaluation of an Earth system model suitable for centennial-scale climate prediction. The principal new components added to physical are terrestrial ocean ecosystems gas-phase tropospheric chemistry, along with their coupled interactions. individual described briefly relevant interactions between explained. Because multiple could lead unstable feedbacks, we go through a careful process spin up ensure that all stable balanced. This spun-up...
Accurate assessment of anthropogenic carbon dioxide (CO2) emissions and their redistribution among the atmosphere, ocean, terrestrial biosphere in a changing climate is critical to better understand global cycle, support development policies, project future change. Here we describe synthesize datasets methodology quantify five major components budget uncertainties. Fossil CO2 (EFOS) are based on energy statistics cement production data, while from land-use change (ELUC), mainly...
Abstract. Accurate assessment of anthropogenic carbon dioxide (CO2) emissions and their redistribution among the atmosphere, ocean, terrestrial biosphere in a changing climate is critical to better understand global cycle, support development policies, project future change. Here we describe synthesize data sets methodologies quantify five major components budget uncertainties. Fossil CO2 (EFOS) are based on energy statistics cement production data, while from land-use change (ELUC), mainly...
Abstract The WFDEI meteorological forcing data set has been generated using the same methodology as widely used WATCH Forcing Data (WFD) by making use of ERA‐Interim reanalysis data. We discuss specifics how changes in and processing have led to improvement over WFD. attribute improvements precipitation wind speed latest basis improved downward shortwave fluxes aerosol corrections. Covering 1979–2012, will allow more thorough comparisons hydrological Earth System model outputs with...
Abstract. We report on the AeroCom Phase II direct aerosol effect (DAE) experiment where 16 detailed global models have been used to simulate changes in distribution over industrial era. All estimated radiative forcing (RF) of anthropogenic DAE, and taken into account sulphate, black carbon (BC) organic aerosols (OA) from fossil fuel, biofuel, biomass burning emissions. In addition several simulated DAE nitrate influenced secondary (SOA). The model all-sky RF total has a range −0.58 −0.02...
Abstract. We describe the HadGEM2 family of climate configurations Met Office Unified Model, MetUM. The concept a model "family" comprises range specific incorporating different levels complexity but with common physical framework. includes atmosphere and ocean components, without vertical extension to include well-resolved stratosphere, an Earth-System (ES) component which dynamic vegetation, biology atmospheric chemistry. improvements designed address systematic errors encountered in...
Abstract The Water and Global Change (WATCH) project evaluation of the terrestrial water cycle involves using land surface models general hydrological to assess hydrologically important variables including evaporation, soil moisture, runoff. Such require meteorological forcing data, this paper describes creation WATCH Forcing Data for 1958–2001 based on 40-yr ECMWF Re-Analysis (ERA-40) 1901–57 reordered reanalysis data. It also discusses analyses model-independent estimates reference crop...
Abstract. The scientific understanding of the Earth's climate system, including central question how system is likely to respond human-induced perturbations, comprehensively captured in GCMs and Earth System Models (ESM). Diagnosing simulated response, comparing responses across different models, crucially dependent on transparent assumptions GCM/ESM has been driven – especially because implementation can involve subjective decisions may differ between modelling groups performing same...
Abstract. Accurate assessment of anthropogenic carbon dioxide (CO2) emissions and their redistribution among the atmosphere, ocean, terrestrial biosphere in a changing climate is critical to better understand global cycle, support development policies, project future change. Here we describe synthesize data sets methodology quantify five major components budget uncertainties. Fossil CO2 (EFOS) are based on energy statistics cement production data, while from land-use change (ELUC), mainly...
[1] The latest Hadley Centre climate model, HadGEM2-ES, includes Earth system components such as interactive chemistry and eight species of tropospheric aerosols. It has been run for the period 1860–2100 in support fifth phase Climate Model Intercomparison Project (CMIP5). Anthropogenic aerosol emissions peak between 1980 2020, resulting a present-day all-sky top atmosphere forcing −1.6 −1.4 W m−2 with without ammonium nitrate aerosols, respectively, sum direct first indirect forcings....
<strong class="journal-contentHeaderColor">Abstract.</strong> This paper evaluates the current status of global modeling organic aerosol (OA) in troposphere and analyzes differences between models as well observations. Thirty-one chemistry transport (CTMs) general circulation (GCMs) have participated this intercomparison, framework AeroCom phase II. The simulation OA varies greatly terms magnitude primary emissions, secondary (SOA) formation, number species used (2 to 62), complexity...
Abstract. Aerosol indirect effects continue to constitute one of the most important uncertainties for anthropogenic climate perturbations. Within international AEROCOM initiative, representation aerosol-cloud-radiation interactions in ten different general circulation models (GCMs) is evaluated using three satellite datasets. The focus on stratiform liquid water clouds since GCMs do not include ice nucleation effects, and none model explicitly parameterises aerosol convective clouds. We...
Abstract. This paper presents a summary of the work done within European Union's Seventh Framework Programme project ECLIPSE (Evaluating Climate and Air Quality Impacts Short-Lived Pollutants). had unique systematic concept for designing realistic effective mitigation scenario short-lived climate pollutants (SLCPs; methane, aerosols ozone, their precursor species) quantifying its air quality impacts, this results in context overarching strategy. The first step was to create new emission...
The main uncertainty in anthropogenic forcing of the Earth's climate stems from pollution aerosols, particularly their “indirect effect” whereby aerosols modify cloud properties. We develop a new methodology to derive measurement‐based estimate using almost exclusively information an Earth radiation budget instrument (CERES) and radiometer (MODIS). statistical relationship between planetary albedo properties, and, further, properties column aerosol concentration. Combining these...
Abstract. The WFDE5 dataset has been generated using the WATCH Forcing Data (WFD) methodology applied to surface meteorological variables from ERA5 reanalysis. WFDEI had previously by applying WFD ERA-Interim. is provided at 0.5∘ spatial resolution but higher temporal (hourly) compared (3-hourly). It also variability since it was aggregation of higher-resolution rather than interpolation lower-resolution ERA-Interim data. Evaluation against observations 13 globally distributed FLUXNET2015...
Radiative forcing is a useful tool for predicting equilibrium global temperature change. However, it not so precipitation changes, as changes in strongly depend on the climate change mechanism and how perturbs atmospheric surface energy budgets. Here suite of model experiments radiative transfer calculations are used to quantify assess this dependency across range mechanisms. It shown that response can be split into two parts: fast correlates with component forcing, slower independent...
Abstract. The impact of black carbon (BC) aerosols on the global radiation balance is not well constrained. Here twelve aerosol models are used to show that at least 20% present uncertainty in modeled BC direct radiative forcing (RF) due diversity simulated vertical profile mass. Results from phases 1 and 2 model intercomparison project (AeroCom). Additionally, a significant fraction variability shown come high altitudes, as, globally, more than 40% total RF exerted above 5 km. emission...