Atmospheric deposition of organic and black carbon to the global oceans

Atmospheric deposition of organic and black carbon to the global oceans. Jurado, E., Dachs, J., Duarte, C., M., & Simo, R. ATMOSPHERIC ENVIRONMENT, 42(34):7931-7939, 11, 2008.
abstract bibtex

Atmospheric deposition of total organic carbon (OC) and black carbon (BC) is lacking or not fully accounted in most current models of the global carbon cycling, specially those fluxes related to gas phase OC. Here, we develop and apply a methodology to estimate wet and dry deposition of total OC to the oceans, based on monthly satellite measurements of aerosol size distributions, wind speed, etc., and estimates of deposition for aerosols and organic compounds. The parameterization of dry deposition velocities account for the dependence of turbulent transport with aerosol diameter, wind speed and the formation of marine aerosol, etc. Gravitational settling is estimated as a function of wet particle diameter, thus including hygroscopic growth due to ambient humidity. Global dry deposition of aerosol OC is estimated to be 11 Tg C y(-1) and wet deposition of particle and gaseous OC are estimated as 47 and 187 Tg C y(-1), respectively. Due to their pulsing variability, wet deposition fluxes can be important locally and as a temporal source of OC to surface waters. Dry and wet deposition of black carbon to the global ocean are estimated to be 2 and 10 Tg C yr(-1), respectively, with higher fluxes in the northern hemisphere and for inter-tropical regions. Finally, considerations on the potential magnitude of the hitherto neglected gross air-sea diffusive exchange fluxes of OC are discussed. Even though the magnitude and direction of these cannot be constrained here, evidence of its important role is given. This study, thus, shows that there is an important spatial and temporal variability in atmosphere-ocean exchanges of OC and BC at different scales, and calls for the need for further research on the important role that these exchanges play in the global carbon cycle. (C) 2008 Elsevier Ltd. All rights reserved.

@article{
 title = {Atmospheric deposition of organic and black carbon to the global oceans},
 type = {article},
 year = {2008},
 identifiers = {[object Object]},
 keywords = {Carbon cycle; Organic carbon; Atmospheric depositi},
 pages = {7931-7939},
 volume = {42},
 month = {11},
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 created = {2015-05-08T02:29:08.000Z},
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 last_modified = {2015-05-08T02:29:08.000Z},
 read = {false},
 starred = {false},
 authored = {false},
 confirmed = {true},
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 citation_key = {ISI:000260941000011},
 source_type = {article},
 abstract = {Atmospheric deposition of total organic carbon (OC) and black carbon
(BC) is lacking or not fully accounted in most current models of the
global carbon cycling, specially those fluxes related to gas phase OC.
Here, we develop and apply a methodology to estimate wet and dry
deposition of total OC to the oceans, based on monthly satellite
measurements of aerosol size distributions, wind speed, etc., and
estimates of deposition for aerosols and organic compounds. The
parameterization of dry deposition velocities account for the dependence
of turbulent transport with aerosol diameter, wind speed and the
formation of marine aerosol, etc. Gravitational settling is estimated as
a function of wet particle diameter, thus including hygroscopic growth
due to ambient humidity. Global dry deposition of aerosol OC is
estimated to be 11 Tg C y(-1) and wet deposition of particle and gaseous
OC are estimated as 47 and 187 Tg C y(-1), respectively. Due to their
pulsing variability, wet deposition fluxes can be important locally and
as a temporal source of OC to surface waters. Dry and wet deposition of
black carbon to the global ocean are estimated to be 2 and 10 Tg C
yr(-1), respectively, with higher fluxes in the northern hemisphere and
for inter-tropical regions. Finally, considerations on the potential
magnitude of the hitherto neglected gross air-sea diffusive exchange
fluxes of OC are discussed. Even though the magnitude and direction of
these cannot be constrained here, evidence of its important role is
given. This study, thus, shows that there is an important spatial and
temporal variability in atmosphere-ocean exchanges of OC and BC at
different scales, and calls for the need for further research on the
important role that these exchanges play in the global carbon cycle. (C)
2008 Elsevier Ltd. All rights reserved.},
 bibtype = {article},
 author = {Jurado, Elena and Dachs, Jordi and Duarte, Carlos M and Simo, Rafel},
 journal = {ATMOSPHERIC ENVIRONMENT},
 number = {34}
}

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The\nparameterization of dry deposition velocities account for the dependence\nof turbulent transport with aerosol diameter, wind speed and the\nformation of marine aerosol, etc. Gravitational settling is estimated as\na function of wet particle diameter, thus including hygroscopic growth\ndue to ambient humidity. Global dry deposition of aerosol OC is\nestimated to be 11 Tg C y(-1) and wet deposition of particle and gaseous\nOC are estimated as 47 and 187 Tg C y(-1), respectively. Due to their\npulsing variability, wet deposition fluxes can be important locally and\nas a temporal source of OC to surface waters. Dry and wet deposition of\nblack carbon to the global ocean are estimated to be 2 and 10 Tg C\nyr(-1), respectively, with higher fluxes in the northern hemisphere and\nfor inter-tropical regions. Finally, considerations on the potential\nmagnitude of the hitherto neglected gross air-sea diffusive exchange\nfluxes of OC are discussed. 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