Publications by Isabelle Bey | EPFL Graph Search

Related publications (23)

Pollution transport efficiency toward the Arctic: Sensitivity to aerosol scavenging and source regions

The processes driving current changes in Arctic atmospheric composition and climate are still uncertain. In particular the relative contributions of major source regions from the midlatitudes remain a matter of debate in the literature. The objectives of t ...

2011

Multimodel ensemble simulations of tropospheric NO2 compared with GOME retrievals for the year 2000

Isabelle Bey, Jérôme Drevet

We present a systematic comparison of tropospheric NO2 from 17 global atmospheric chemistry models with three state-of-the-art retrievals from the Global Ozone Monitoring Experiment (GOME) for the year 2000. The models used constant anthropogenic emissions ...

Copernicus Publications2006

Long-Range Transport to Europe : Seasonal Variations and Implications for the European Ozone Budget

Isabelle Bey, Marion Auvray

We use a chemical transport model (GEOS-CHEM) to quantify the contribution of long-range transported pollution to the European ozone ({O}{3}) budget for the year 1997. The model reproduces the main features observed over Europe for {O}{3}, carbon monoxid ...

2005

Multimodel estimates of intercontinental source-receptor relationships for ozone pollution

Songmei Wu, Isabelle Bey

Understanding the surface O-3 response over a "receptor" region to emission changes over a foreign "source" region is key to evaluating the potential gains from an international approach to abate ozone (O-3) pollution. We apply an ensemble of 21 global and ...

2009

A multi-model assessment of pollution transport to the Arctic

Isabelle Bey

We examine the response of Arctic gas and aerosol concentrations to perturbations in pollutant emissions from Europe. East and South Asia, and North America using results from a coordinated model intercomparison. These sensitivities to regional emissions ( ...

Copernicus Publications2008

Trace gas and aerosol interactions in the fully coupled model of aerosol-chemistry-climate ECHAM5-HAMMOZ: 2. Impact of heterogeneous chemistry on the global aerosol distributions

Isabelle Bey, Luca Pozzoli

We use the ECHAM5-HAMMOZ aerosol-chemistry-climate model to quantify the influence of trace gas–aerosol interactions on the regional and global distributions and optical properties of aerosols for present-day conditions. The model includes fully interactiv ...

2008

Impact of transatlantic transport episodes on summertime ozone in Europe

Isabelle Bey

This paper reports on the transport of ozone

{O}_{3}

and related species over the North Atlantic ocean and its impact on Europe. Measurements of nitrogen dioxide (

{NO}_{2}

)and carbon monoxide (CO) columns from the GOME and MOPITT satellite instrument ...

Copernicus Publications2006

Multi-model simulations of carbon monoxide: Comparison with observations and projected near-future changes

Isabelle Bey, Jérôme Drevet

We analyze present-day and future carbon monoxide (CO) simulations in 26 state-of-the-art atmospheric chemistry models run to study future air quality and climate change. In comparison with near-global satellite observations from the MOPITT instrument and ...

2006

Nitrogen and Sulfur Deposition on regional and global scales: A multi-model evaluation

Isabelle Bey, Jérôme Drevet

We use 23 atmospheric chemistry transport models to calculate current and future (2030) deposition of reactive nitrogen (NOy, NHx) and sulfate (SOx) to land and ocean surfaces. The models are driven by three emission scenarios: (1) current air quality legi ...

2006

Assimilation of POLDER aerosol optical thickness into the LMDz-INCA model: Implications for the Arctic aerosol burden

Isabelle Bey, Sylvia Generoso

The large spatial and temporal variability of atmospheric aerosol load makes it a challenge to quantify aerosol effect on climate. This study is one of the first attempts to apply data assimilation for the analysis of global aerosol distribution. Aerosol o ...

2007

Atmospheric composition change - global and regional air quality

Isabelle Bey, Sylvia Generoso

Air quality transcends all scales with in the atmosphere from the local to the global with handovers and feedbacks at each scale interaction. Air quality has manifold effects on health, ecosystems heritage and, climate. In this review the state of scientif ...

Elsevier2009

A model investigation of tropospheric ozone chemical tendencies in long-range transported pollution plumes

Isabelle Bey, Marion Auvray

The impact of continental outflow on the ozone chemical tendencies (i.e., production and loss rates) is quantified in the North Atlantic and northwest Pacific regions using the GEOS-Chem and the MOZECH global models of chemistry and transport. The ozone te ...

2007

Trace gas and aerosol interactions in the fully coupled model of aerosol-chemistry-climate ECHAM5-HAMMOZ: 1. Model description and insights from the spring 2001 TRACE-P experiment

Isabelle Bey, Luca Pozzoli

In this paper, we introduce the ECHAM5-HAMMOZ aerosol- chemistry-climate model that includes fully interactive simulations of Ox-NOx-hydrocarbons chemistry and of aerosol microphysics (including prognostic size distribution and mixing state of aerosols) im ...

2008

Influence of El Nino-Southern Oscillation on the interannual variability of tropospheric ozone in the nothern midlatitudes

Isabelle Bey, Sylvia Generoso, Symeon Koumoutsaris

We use the GEOS-Chem model to interpret long-term measurements of tropospheric

{O}_{3}

and CO and to investigate the factors that contribute to their interannual variation (IAV) during the period from 1987 to 2005 with a focus on the northern mid-latitu ...

2008

Magnitude and seasonality of wetland methane emissions from the Hudson Bay Lowlands (Canada)

Isabelle Bey, Jed Oliver Kaplan, Jérôme Drevet

The Hudson Bay Lowlands (HBL) is the second largest boreal wetland ecosystem in the world and an important natural source of global atmospheric methane. We quantify the HBL methane emissions by using the GEOS-Chem chemical transport model to simulate aircr ...

Copernicus Publications2011

A satellite- and model-based assessment of the 2003 Russian fires: Impact on the Arctic region

Isabelle Bey, Sylvia Generoso

In this paper, we address the issues of the representation of boreal fires in a global chemistry and transport model (GEOS-Chem) as well as their contribution to the Arctic aerosol optical thickness and black carbon (BC) deposition, with a focus on the 200 ...

2007

Aerosol vertical distribution in dust outflow over the Atlantic: Comparisons between Global Earth Observing System (GEOS)-Chem and Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO)

Isabelle Bey, Sylvia Generoso

Vertically-resolved attenuated backscatter from the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) mission and Aerosol Optical Thickness (AOT)from Moderate-resolution Imaging Spectroradiometer (MODIS) are used to characterize t ...

2008

Modelling the effect of size on the aerial dispersal of microorganisms

Isabelle Bey, Symeon Koumoutsaris

Aim We investigate the long-standing question of whether the small size of microbes allows most microbial species to colonize all suitable sites around the globe or whether their ranges are limited by opportunities for dispersal. In this study we use a mod ...

2012

Multimodel ensemble simulations of present-day and near future tropospheric ozone

Isabelle Bey, Jérôme Drevet

2006

A global modeling study of the year-to-year variations in tropospheric ozone

Isabelle Bey, Symeon Koumoutsaris

2006