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Estimates of Tropical Bromoform Emissions Using an Inversion Method : Volume 14, Issue 2 (28/01/2014)

By Ashfold, M. J.

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Book Id: WPLBN0003979368
Format Type: PDF Article :
File Size: Pages 16
Reproduction Date: 2015

Title: Estimates of Tropical Bromoform Emissions Using an Inversion Method : Volume 14, Issue 2 (28/01/2014)  
Author: Ashfold, M. J.
Volume: Vol. 14, Issue 2
Language: English
Subject: Science, Atmospheric, Chemistry
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Manning, A. J., Robinson, A. D., P. Harri, N. R., Pyle, J. A., Warwick, N. J., & Ashfold, M. J. (2014). Estimates of Tropical Bromoform Emissions Using an Inversion Method : Volume 14, Issue 2 (28/01/2014). Retrieved from

Description: Department of Chemistry, University of Cambridge, Cambridge, UK. Bromine plays an important role in ozone chemistry in both the troposphere and stratosphere. When measured by mass, bromoform (CHBr3) is thought to be the largest organic source of bromine to the atmosphere. While seaweed and phytoplankton are known to be dominant sources, the size and the geographical distribution of CHBr3 emissions remains uncertain. Particularly little is known about emissions from the Maritime Continent, which have usually been assumed to be large, and which appear to be especially likely to reach the stratosphere. In this study we aim to reduce this uncertainty by combining the first multi-annual set of CHBr3 measurements from this region, and an inversion process, to investigate systematically the distribution and magnitude of CHBr3 emissions. The novelty of our approach lies in the application of the inversion method to CHBr3. We find that local measurements of a short-lived gas like CHBr3 can be used to constrain emissions from only a relatively small, sub-regional domain. We then obtain detailed estimates of CHBr3 emissions within this area, which appear to be relatively insensitive to the assumptions inherent in the inversion process. We extrapolate this information to produce estimated emissions for the entire tropics (defined as 20° S–20° N) of 225 Gg CHBr3 yr−1. The ocean in the area we base our extrapolations upon is typically somewhat shallower, and more biologically productive, than the tropical average. Despite this, our tropical estimate is lower than most other recent studies, and suggests that CHBr3 emissions in the coastline-rich Maritime Continent may not be stronger than emissions in other parts of the tropics.

Estimates of tropical bromoform emissions using an inversion method

Levine, J. G., Braesicke, P., Harris, N. R. P., Savage, N. H., and Pyle, J. A.: Pathways and timescales for troposphere-to-stratosphere transport via the tropical tropopause layer and their relevance for very short lived substances, J. Geophys. Res.-Atmos., 112, D04308, doi:10.1029/2005JD006940, 2007.; Liang, Q., Stolarski, R. S., Kawa, S. R., Nielsen, J. E., Douglass, A. R., Rodriguez, J. M., Blake, D. R., Atlas, E. L., and Ott, L. E.: Finding the missing stratospheric Bry: a global modeling study of CHBr3 and CH2Br2, Atmos. Chem. Phys., 10, 2269–2286, doi:10.5194/acp-10-2269-2010, 2010.; Manley, S. L., Goodwin, K., and North, W. J.: Laboratory Production Of Bromoform, Methylene Bromide, And Methyl Iodide By Macroalgae And Distribution In Nearshore Southern California Waters, Limnol. Oceanogr., 37, 1652–1659, 1992.; Manning, A. J.: The challenge of estimating regional trace gas emissions from atmospheric observations, Philos. T. R. Soc. A, 369, 1943–1954, doi:10.1098/rsta.2010.0321, 2011.; Manning, A. J., Ryall, D. B., Derwent, R. G., Simmonds, P. G., and O'Doherty, S.: Estimating European emissions of ozone-depleting and greenhouse gases using observations and a modeling back-attribution technique, J. Geophys. Res.-Atmos., 108, 4405, doi:10.1029/2002JD002312, 2003.; Manning, A. J., O'Doherty, S., Jones, A. R., Simmonds, P. G., and Derwent, R. G.: Estimating UK methane and nitrous oxide emissions from 1990 to 2007 using an inversion modeling approach, J. Geophys. Res., 116, D02305, doi:10.1029/2010JD014763, 2011.; Mohd Nadzir, M. S., Phang, S. M., Abas, M. R., Abdul Rahman, N., Abu Samah, A., Sturges, W. T., Oram, D. E., Mills, G. P., Leedham, E. C., Pyle, J. A., Harris, N. R. P., Robinson, A. D., Ashfold, M. J., Mead, M. I., Latif, M. T., Mohd Hanafiah, M., Khan, M. F., and Amiruddin, A. M.: Bromocarbons in the tropical coastal and open ocean atmosphere during the Prime Expedition Scientific Cruise 2009 (PESC 09), Atmos. Chem. Phys. Discuss., 14, 953–984, doi:10.5194/acpd-14-953-2014, 2014.; Montzka, S. A. and Reimann, S.: Ozone-Depleting Substances (ODSs) and Related Chemicals, vol. Scientific Assessment of Ozone Depletion: 2010, Global Ozone Research and Monitoring Project, Report No. 52, chap. 1, World Meteorological Organization (WMO), Geneva, 2011.; Moore, R. M., Webb, M., Tokarczyk, R., and Wever, R.: Bromoperoxidase and iodoperoxidase enzymes and production of halogenated methanes in marine diatom cultures, J. Geophys. Res.-Oceans, 101, 20899–20908, doi:10.1029/96JC01248, 1996.; Morrison, N. L. and Webster, H. N.: An Assessment of Turbulence Profiles in Rural and Urban Environments Using Local Measurements and Numerical Weather Prediction Results, Bound.-Lay. Meteorol., 115, 223–239, doi:10.1007/s10546-004-4422-8, 2005.; O'Doherty, S., Cunnold, D. M., Manning, A., Miller, B. R., Wang, R. H. J., Krummel, P. B., Fraser, P. J., Simmonds, P. G., McCulloch, A., Weiss, R. F., Salameh, P., Porter, L. W., Prinn, R. G., Huang, J., Sturrock, G., Ryall, D., Derwent, R. G., and Montzka, S. A.: Rapid growth of hydrofluorocarbon 134a and hydrochlorofluorocarbons 141b, 142b, and 22 from Advanced Global Atmospheric Gases Experiment (AGAGE) observations at Cape Grim, Tasmania, and Mace Head, Ireland, J. Geophys. Res., 109, D06310, doi:10.1029/2003JD004277, 2004.; Ordóñez, C.


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