• Aucun résultat trouvé

Identifying source regions at the Princes Elisabeth station in Antarctica, using dispersion modelling tools : a case study

N/A
N/A
Protected

Academic year: 2022

Partager "Identifying source regions at the Princes Elisabeth station in Antarctica, using dispersion modelling tools : a case study"

Copied!
1
0
0

Texte intégral

(1)

EGU2020-9127

https://doi.org/10.5194/egusphere-egu2020-9127 EGU General Assembly 2020

© Author(s) 2021. This work is distributed under the Creative Commons Attribution 4.0 License.

Identifying source regions at the Princes Elisabeth station in Antarctica, using dispersion modelling tools: a case study

Karen De Causmaecker1, Alexander Mangold1, Christophe Walgraeve2, Preben Van Overmeiren2, Nadine Mattielli3, Stefania Gili3, and Andy W. Delcloo1

1Royal Meteorological Institute of Belgium (RMI), Ukkel, Belgium

2Research group EnVOC, Ghent University, Ghent, Belgium

3Laboratoire G-time, Université Libre de Bruxelles, ULB, Brussels, Belgium

During the time period December 2019 – January 2020, a lot of biomass burning has been ongoing in the Southern Hemisphere. This led to a large amount of fine dust being emitted and transported into the atmosphere of the Southern Hemisphere.

With the dispersion model FLEXPART, we will simulate these fires, using the CAMS Global Fire Assimilation System (GFAS) which assimilates fire radiative power (FRP) observations from satellite- based sensors in order to reproduce daily estimates of biomass burning emissions. Also information on the injection height is available.

Aerosol fluxes and sources in Antarctica and its closely associated Southern Ocean are poorly constrained, in particular the particle chemistry. A detailed understanding of present-day atmospheric transport pathways of particles and of volatile organic compounds (VOC) from source to deposition in Antarctica remains essential to document biogeochemical cycles and the relative importance of natural and anthropogenic compounds. Within the CHASE project (chase.meteo.be), the Royal Meteorological Institute of Belgium, Ghent University and the Université Libre de Bruxelles are doing research at the Belgian research station Princess Elisabeth (71.9°S, 23.3°E; East Antarctica, Dronning Maud Land) on the physical-chemical composition of both atmospheric particles, particles in surface snow particles as well as of VOCs. Since 2018, samples are taken both near the Belgian research station Princess Elisabeth (active sampling with pumps) and on a transect to the coast (passive samplers and surface snow samples).

In this contribution we will thoroughly investigate the atmospheric transport pathways of the recent biomass burning plumes, and in particular to what extent parts of these plumes have reached Antarctica. The measured chemical signatures of atmospheric particles and VOCs will help to constrain the simulations of the dispersion model.

Powered by TCPDF (www.tcpdf.org)

Références

Documents relatifs

Sofia University, as the national leader in higher education, plays a crucial role in this process by providing better e-skills oriented education and training, targeting the

The top three actions were implementing respectful workplace policies and educating employees (78%), providing employee assistance programs and other services addressing

In case that the successful applicant(s) cannot enter Japan and cannot arrive at the University of Tokyo by the date specified in contract, the contract will be suspended until

Given an evaluation query and the result of the evaluation query, is it possible to derive the minimal subdatabase simply by an inverse mapping without any additional annotations of

The classes of rule sets whose chase terminates on all paths (all possible derivation sequences of chase steps) independent of given databases (thus all instances) is denoted by CT ∀∀

We used a framework that combines language models and similarity search, which improves our system from last year by using a different feature selection technique, extending

Different to our system of last year, we estimate the prior probabil- ity P (a) using the home location of the owner of video x, in those runs where the use of gazetteer look-up was

As shown in [16], safe restriction (a) guarantees chase termination in polynomial time data complexity, (b) is strictly more general than stratification, and (c) it can be checked by