Evaluating global emission inventories of biogenic bromocarbons
Abstract
Emissions of halogenated very short-lived substances (VSLS) are poorly constrained. However, their inclusion in global models is required to simulate a realistic inorganic bromine (Bry) loading in both the troposphere, where bromine chemistry perturbs global oxidising capacity, and in the stratosphere, where it is a major sink for ozone (O₃). We have performed simulations using a 3-D chemical transport model (CTM) including three top-down and a single bottom-up derived emission inventory of the major brominated VSLS bromoform (CHBr₃) and dibromomethane (CH₂Br₂). We perform the first concerted evaluation of these inventories, comparing both the magnitude and spatial distribution of emissions. For a quantitative evaluation of each inventory, model output is compared with independent long-term observations at National Oceanic and Atmospheric Administration (NOAA) ground-based stations and with aircraft observations made during the NSF (National Science Foundation) HIAPER Pole-to-Pole Observations (HIPPO) project. For CHBr₃, the mean absolute deviation between model and surface observation ranges from 0.22 (38 %) to 0.78 (115 %) parts per trillion (ppt) in the tropics, depending on emission inventory. For CH₂Br₂, the range is 0.17 (24%) to 1.25 (167%) ppt. We also use aircraft observations made during the 2011 Stratospheric Ozone: Halogen Impacts in a Varying Atmosphere (SHIVA) campaign, in the tropical western Pacific. Here, the performance of the various inventories also varies significantly, but overall the CTM is able to reproduce observed CHBr₂ well in the free troposphere using an inventory based on observed sea-to-air fluxes. Finally, we identify the range of uncertainty associated with these VSLS emission inventories on stratospheric bromine loading due to VSLS (BryyVSLS). Our simulations show BryyVSLS ranges from ~4.0 to 8.0 ppt depending on the inventory. We report an optimised estimate at the lower end of this range (~4 ppt) based on combining the CHBr₃ and CH₂Br₂ inventories which give best agreement with the compilation of observations in the tropics.
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BibTeX
@article{hossaini2026evaluating,
title = {{Evaluating global emission inventories of biogenic bromocarbons}},
author = {R. Hossaini and H. Mantle and M P Chipperfield and S A Montzka and P. Hamer and F. Ziska and B. Quack and K. Krüger and S. Tegtmeier and E. Atlas and S. Sala and A. Engel and H. Bönisch and T. Keber and D. Oram and G. Mills and C. Ordóñez and A. Saiz-Lopez and N. Warwick and Q. Liang and W. Feng and F. Moore and B R Miller and V. Marécal and N a D Richards and M. Dorf and K. Pfeilsticker},
journal = {Atmospheric Chemistry and Physics},
year = {2026},
month = oct,
doi = {10.5194/acp-13-11819-2013},
url = {https://hal.science/hal-05796848v1},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - Evaluating global emission inventories of biogenic bromocarbons
AU - R. Hossaini
AU - H. Mantle
AU - M P Chipperfield
AU - S A Montzka
AU - P. Hamer
AU - F. Ziska
AU - B. Quack
AU - K. Krüger
AU - S. Tegtmeier
AU - E. Atlas
AU - S. Sala
AU - A. Engel
AU - H. Bönisch
AU - T. Keber
AU - D. Oram
AU - G. Mills
AU - C. Ordóñez
AU - A. Saiz-Lopez
AU - N. Warwick
AU - Q. Liang
AU - W. Feng
AU - F. Moore
AU - B R Miller
AU - V. Marécal
AU - N a D Richards
AU - M. Dorf
AU - K. Pfeilsticker
PY - 2026
DA - 2026/10/13
JO - Atmospheric Chemistry and Physics
DO - 10.5194/acp-13-11819-2013
UR - https://hal.science/hal-05796848v1
AB - Emissions of halogenated very short-lived substances (VSLS) are poorly constrained. However, their inclusion in global models is required to simulate a realistic inorganic bromine (Bry) loading in both the troposphere, where bromine chemistry perturbs global oxidising capacity, and in the stratosphere, where it is a major sink for ozone (O₃). We have performed simulations using a 3-D chemical transport model (CTM) including three top-down and a single bottom-up derived emission inventory of the major brominated VSLS bromoform (CHBr₃) and dibromomethane (CH₂Br₂). We perform the first concerted evaluation of these inventories, comparing both the magnitude and spatial distribution of emissions. For a quantitative evaluation of each inventory, model output is compared with independent long-term observations at National Oceanic and Atmospheric Administration (NOAA) ground-based stations and with aircraft observations made during the NSF (National Science Foundation) HIAPER Pole-to-Pole Observations (HIPPO) project. For CHBr₃, the mean absolute deviation between model and surface observation ranges from 0.22 (38 %) to 0.78 (115 %) parts per trillion (ppt) in the tropics, depending on emission inventory. For CH₂Br₂, the range is 0.17 (24%) to 1.25 (167%) ppt. We also use aircraft observations made during the 2011 Stratospheric Ozone: Halogen Impacts in a Varying Atmosphere (SHIVA) campaign, in the tropical western Pacific. Here, the performance of the various inventories also varies significantly, but overall the CTM is able to reproduce observed CHBr₂ well in the free troposphere using an inventory based on observed sea-to-air fluxes. Finally, we identify the range of uncertainty associated with these VSLS emission inventories on stratospheric bromine loading due to VSLS (Bry_y^VSLS). Our simulations show Bry_y^VSLS ranges from ~4.0 to 8.0 ppt depending on the inventory. We report an optimised estimate at the lower end of this range (~4 ppt) based on combining the CHBr₃ and CH₂Br₂ inventories which give best agreement with the compilation of observations in the tropics.
SN - 1680-7316
SN - 1680-7324
ER -