Different approaches to explore the impact of COVID-19 lockdowns on carbonaceous aerosols at a European rural background site.

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985858%3A_____%2F23%3A00584264" target="_blank" >RIV/67985858:_____/23:00584264 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/86652079:_____/23:00573900 RIV/00216224:14310/23:00131499 RIV/00216208:11320/23:10474226

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0048969723031480?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0048969723031480?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.scitotenv.2023.164527" target="_blank" >10.1016/j.scitotenv.2023.164527</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Different approaches to explore the impact of COVID-19 lockdowns on carbonaceous aerosols at a European rural background site.

Popis výsledku v původním jazyce

To prevent the fast spread of COVID-19, worldwide restrictions have been put in place, leading to a reduction in emis-sions from most anthropogenic sources. In this study, the impact of COVID-19 lockdowns on elemental (EC) and or-ganic (OC) carbon was explored at a European rural background site combining different approaches: - Horizontal approach (HA) consists of comparing concentrations of pollutants measured at 4 m a.g.l. during pre-COVID period (2017-2019) to those measured during COVID period (2020-2021), - Vertical approach (VA) con-sists of inspecting the relationship between OC and EC measured at 4 m and those on top (230 m) of a 250 m-tall tower in Czech Republic. The HA showed that the lockdowns did not systematically result in lower concentrations of both carbonaceous fractions unlike NO2 (25 to 36 % lower) and SO2 (10 to 45 % lower). EC was generally lower during the lockdowns (up to 35 %), likely attributed to the traffic restrictions whereas increased OC (up to 50 %) could be attributed to enhanced emissions from the domestic heating and biomass burning during this stay-home pe-riod, but also to the enhanced concentration of SOC (up to 98 %). EC and OC were generally higher at 4 m suggesting a greater influence of local sources near the surface. Interestingly, the VA revealed a significantly enhanced correlation between EC and OC measured at 4 m and those at 230 m (R values up to 0.88 and 0.70 during lockdown 1 and 2, re-spectively), suggesting a stronger influence of aged and long distance transported aerosols during the lockdowns. This study reveals that lockdowns did not necessarily affect aerosol absolute concentrations but it certainly influenced their vertical distribution. Therefore, analyzing the vertical distribution can allow a better characterization of aerosol prop-erties and sources at rural background sites, especially during a period of significantly reduced human activities.

Název v anglickém jazyce

Different approaches to explore the impact of COVID-19 lockdowns on carbonaceous aerosols at a European rural background site.

Popis výsledku anglicky

To prevent the fast spread of COVID-19, worldwide restrictions have been put in place, leading to a reduction in emis-sions from most anthropogenic sources. In this study, the impact of COVID-19 lockdowns on elemental (EC) and or-ganic (OC) carbon was explored at a European rural background site combining different approaches: - Horizontal approach (HA) consists of comparing concentrations of pollutants measured at 4 m a.g.l. during pre-COVID period (2017-2019) to those measured during COVID period (2020-2021), - Vertical approach (VA) con-sists of inspecting the relationship between OC and EC measured at 4 m and those on top (230 m) of a 250 m-tall tower in Czech Republic. The HA showed that the lockdowns did not systematically result in lower concentrations of both carbonaceous fractions unlike NO2 (25 to 36 % lower) and SO2 (10 to 45 % lower). EC was generally lower during the lockdowns (up to 35 %), likely attributed to the traffic restrictions whereas increased OC (up to 50 %) could be attributed to enhanced emissions from the domestic heating and biomass burning during this stay-home pe-riod, but also to the enhanced concentration of SOC (up to 98 %). EC and OC were generally higher at 4 m suggesting a greater influence of local sources near the surface. Interestingly, the VA revealed a significantly enhanced correlation between EC and OC measured at 4 m and those at 230 m (R values up to 0.88 and 0.70 during lockdown 1 and 2, re-spectively), suggesting a stronger influence of aged and long distance transported aerosols during the lockdowns. This study reveals that lockdowns did not necessarily affect aerosol absolute concentrations but it certainly influenced their vertical distribution. Therefore, analyzing the vertical distribution can allow a better characterization of aerosol prop-erties and sources at rural background sites, especially during a period of significantly reduced human activities.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10509 - Meteorology and atmospheric sciences

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Science of the Total Environment

ISSN

0048-9697

e-ISSN

1879-1026

Svazek periodika

892

Číslo periodika v rámci svazku

SEP 20

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

11

Strana od-do

164527

Kód UT WoS článku

001026002000001

EID výsledku v databázi Scopus

2-s2.0-85162083490