Anthropogenic Impacts on Tropospheric Reactive Chlorine Since the Preindustrial - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Geophysical Research Letters Année : 2021

Anthropogenic Impacts on Tropospheric Reactive Chlorine Since the Preindustrial

Shuting Zhai
Xuan Wang
Joseph R Mcconnell
Lei Geng
Jihong Cole‐dai
Michael Sigl
  • Fonction : Auteur
Nathan Chellman
Tomás Sherwen
Ryan Pound
Koji Fujita
Shohei Hattori
Jonathan M Moch
Lei Zhu
Mat Evans
Pengfei Liu
Daniel Pasteris
  • Fonction : Auteur
Yuk‐chun Chan
Lee T Murray
Becky Alexander

Résumé

Abstract Tropospheric reactive gaseous chlorine (Cl y ) impacts the atmosphere's oxidation capacity with implications for chemically reduced gases such as methane. Here we use Greenland ice‐core records of chlorine, sodium, and acidity, and global model simulations to show how tropospheric Cl y has been impacted by anthropogenic emissions since the 1940s. We show that anthropogenic contribution of nonsea‐salt chlorine significantly influenced total chlorine and its trends after the 1940s. The modeled regional 170% Cl y increase from preindustrial to the 1970s was driven by acid displacement from sea‐salt‐aerosol, direct emission of hydrochloric acid (HCl) from combustion, and chemical reactions driven by anthropogenic nitrogen oxide (NO x ) emissions. Since the 1970s, the modeled 6% Cl y decrease was caused mainly by reduced anthropogenic HCl emissions from air pollution mitigation policies. Our findings suggest that anthropogenic emissions of acidic gases and their emission control strategies have substantial impacts on Cl y with implications for tropospheric oxidants, methane, and mercury.
Fichier principal
Vignette du fichier
Zhai_et_al_2021GL093808.pdf (1.63 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-04278530 , version 1 (10-11-2023)

Identifiants

Citer

Shuting Zhai, Xuan Wang, Joseph R Mcconnell, Lei Geng, Jihong Cole‐dai, et al.. Anthropogenic Impacts on Tropospheric Reactive Chlorine Since the Preindustrial. Geophysical Research Letters, 2021, 48 (14), ⟨10.1029/2021GL093808⟩. ⟨hal-04278530⟩
9 Consultations
8 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More