A strong source of methyl chloride to the atmosphere from tropical coastal land

  title={A strong source of methyl chloride to the atmosphere from tropical coastal land},
  author={Yoko Yokouchi and Y. Noijiri and L. A. Barrie and Desiree Toom‐Sauntry and Toshinobu Machida and Yoko Inuzuka and Hajime Akimoto and H.-J. Li and Yoshinori Fujinuma and Shuji Aoki},
Methyl chloride (CH3Cl), the most abundant halocarbon in the atmosphere, has received much attention as a natural source of chlorine atoms in the stratosphere. The annual global flux of CH3 Cl has been estimated to be around 3.5 Tg on the grounds that this must balance the loss through reaction with OH radicals (which gives a lifetime for atmospheric CH3Cl of 1.5 yr). The most likely main source of methyl chloride has been thought to be oceanic emission, with biomass burning the second largest… 
Biological degradation of methyl chloride in coastal seawater
Methyl chloride (CH3Cl) is the most abundant halocarbon in the atmosphere, and constitutes a significant fraction of the total atmospheric halogen burden. Chemical reactions of CH3Cl in seawater are
Strong emission of methyl chloride from tropical plants
Observations of large emissions of methyl chloride from some common tropical plants (certain types of ferns and Dipterocarpaceae), ranging from 0.1 to 3.7 µg per gram of dry leaf per hour, indicate a substantial shortfall in the overall methyl chloride budget.
Emission estimates of methyl chloride from industrial sources in China based on high frequency atmospheric observations
Methyl Chloride (CH3Cl) is a chlorine-containing trace gas in the atmosphere contributing significantly to stratospheric ozone depletion (Carpenter et al. 2014). In the global CH3Cl budget, the
Evidence for a major missing source in the global chloromethane budget from stable carbon isotopes
Abstract. Chloromethane (CH3Cl) is the most important natural input of reactive chlorine to the stratosphere, contributing about 16 % to stratospheric ozone depletion. Due to the phase-out of
Coastal emissions of methyl bromide and methyl chloride along the eastern Gulf of Mexico and the east coast of the United States
Measurements of methyl bromide (CH3Br) and methyl chloride (CH3Cl) were made during the Gulf of Mexico and the East Coast Carbon (GOMECC) cruise in the summer of 2007. This was the first large‐scale
A three-dimensional global model study of atmospheric methyl chloride budget and distributions
[1] Global simulations of atmospheric methyl chloride (CH3Cl) are conducted using the GEOS-CHEM model in order to understand better its sources and sinks. Observations from 7 surface sites and 9
A preliminary three-dimensional global model study of atmospheric methyl chloride distributions
A global three-dimensional atmospheric model of methyl chloride (CH3Cl) is presented. When incorporating known terrestrial and oceanic source terms, the tropospheric budget of CH3Cl is unbalanced. We
Methyl chloride and other chlorocarbons in polluted air during INDOEX : Indian Ocean Experiment (INDOEX)
Methyl chloride (CH 3 Cl) is the most abundant, natural, chlorine-containing gas in the atmosphere, with oceans and biomass burning as major identified sources. Estimates of global emissions suffer
Measurements of reactive chlorocarbons over the Surinam tropical rain forest: indications for strong biogenic emissions
Contrary to the understanding of the emissions and chemical behavior of halocarbons from anthropogenic sources (e.g. CFCs and HCFCs), the biogeochemistry of naturally emitted halocarbons is still
Distribution of methyl chloride, methyl bromide, and methyl iodide in the marine boundary air over the western Pacific and southeastern Indian Ocean
Methyl chloride (CH3Cl), methyl bromide (CH3Br), and methyl iodide (CH3I) in marine boundary air were measured over the western Pacific and the southeastern Indian Ocean during the period of December


Tropospheric budget of reactive chlorine
Reactive chlorine in the lower atmosphere (as distinguished from chlorofluorocarbon-derived chlorine in the stratosphere) is important to considerations of precipitation acidity, corrosion, foliar
Atmospheric methyl chloride
Ocean‐atmosphere exchange of methyl chloride: Results from NW Atlantic and Pacific Ocean studies
Measurements of methyl chloride concentrations and saturations in the NW Atlantic and Pacific Ocean from 40°N to 40°S are presented. Labrador Sea waters, analyzed in July, were at or below
Biomass burning emissions and vertical distribution of atmospheric methyl halides and other reduced carbon gases in the South Atlantic region
The NASA TRACE A experiment (September – October 1992) investigated effects of dry season biomass burning emissions from both South America and southern Africa on the tropical South Atlantic
Tropospheric chemistry: A global perspective
A model for the photochemistry of the global troposphere constrained by observed concentrations of H2O, O3, CO, CH4, NO, NO2, and HNO3 is presented. Data for NO and NO2 are insufficient to define the
Alkyl nitrates, nonmethane hydrocarbons, and halocarbon gases over the equatorial Pacific Ocean during Saga 3
The third joint Soviet-American Gases and Aerosols (SAGA 3) experiment was a research cruise conducted aboard the Akademik Korolev in February and March 1990. The cruise covered a region of the
Methyl halides in and over the eastern Pacific (40°N–32°S)
Methyl chloride, methyl bromide, and methyl iodide measurements in and over the eastern Pacific (40 /sup 0/N and 32 /sup 0/S latitude) show mean air concentrations of 633 parts per trillion (ppt), 23
Isoprene in the marine boundary layer (southeast Asian Sea, eastern Indian Ocean, and Southern Ocean): Comparison with dimethyl sulfide and bromoform
Sampling for atmospheric isoprene and some other volatile organic compounds was conducted during two cruises in the austral summer, covering the western Pacific, eastern Indian Ocean, Southeast Asian
Halogens in the atmosphere
Extant data from measurements of halogens in the atmosphere are reviewed in the following categories: gaseous chlorine compounds (inorganic and organic), particulate chloride and chloride in