The use of δ 13C in CO to determine removal of CH4 by Cl radicals in the atmosphere
Abstrak
The reaction of CH _4 with chlorine (Cl) radicals in the atmosphere is associated with an extraordinarily strong isotopic fractionation, where ^12 CH _4 reacts about 70 ‰ faster with Cl than ^13 CH _4 . Therefore, although the Cl-based sink of CH _4 constitutes only a small contribution to its total removal rate, the uncertainty in this small sink has been identified as one of the two largest uncertainties of isotope-based CH _4 source apportionment at the global scale. The uncertainty arises from the fact that Cl levels in the atmosphere are so low that they cannot be detected directly. One very sensitive indirect method to identify and quantify the CH _4 + Cl reaction in the atmosphere is the detection of the extremely ^13 C-depleted reaction product carbon monoxide (CO) from this reaction. This article reviews the concept of this approach, its successful application in the atmosphere, its challenges and opportunities for identifying and quantifying Cl-based removal of CH _4 at the regional and global scale and its potential to detect and evaluate possible attempts to enhance CH _4 removal from the atmosphere.
Topik & Kata Kunci
Penulis (22)
Thomas Röckmann
Maarten van Herpen
Chloe Brashear
Carina van der Veen
Sergey Gromov
Qinyi Li
Alfonso Saiz-Lopez
Daphne Meidan
Africa Barreto
Natalia Prats
Ignacio Mármol
Ramón Ramos
Isabel Baños
Jesús M Arrieta
Sönke Zaehnle
Armin Jordan
Heiko Moossen
Helder Timas
Dickon Young
Peter Sperlich
Rowena Moss
Matthew S Johnson
Akses Cepat
- Tahun Terbit
- 2024
- Sumber Database
- DOAJ
- DOI
- 10.1088/1748-9326/ad4375
- Akses
- Open Access ✓