@Article{GonçalvesInno:2018:AnQuCa,
author = "Gon{\c{c}}alves, Iury Angelo and Innocentini, Valdir",
affiliation = "{Universidade Federal do Esp{\'{\i}}rito Santo (UFES)} and
{Instituto Nacional de Pesquisas Espaciais (INPE)}",
title = "Analytical quantification of carbon dioxide exchange mediated by
spume droplets",
journal = "Boundary-Layer Meteorology",
year = "2018",
volume = "169",
number = "2",
pages = "327--345",
month = "Nov.",
keywords = "Air-sea CO2 exchange, Droplet gas diffusion model, Spume droplet
CO2 flux.",
abstract = "The role of spume droplets in the air- sea exchange of CO2 is
investigated by applying simultaneous rate equations for the mass
of dissolved CO2, radius, and temperature of a droplet. The life
of a droplet can be divided into two phases, except when the air
is saturated, and when the air and sea temperatures are the same.
In the first phase, the CO2 fluxes at the droplet surface and at
the air- sea interface are in the same direction. In the second
phase, the air- droplet CO2 gradient vanishes, and the droplet
loses water and CO2 as long as there is evaporation. The largest
sea- air CO2 transfer by the droplets is in the case where the sea
temperature is greater than the air temperature, and the air- sea
CO2 concentration gradient is towards the air. The net transfer of
CO2 for a droplet depends on its lifetime, which is longer for
smaller droplets. The overall role of a droplet spectrum is
assessed assuming a sea- spray generation function for radii from
30 to 500 mu m, whose formulation of its dependence on the
surface- wave peak period and 10- m wind speed is currently
accepted; for situations with an air- sea CO2 concentration
gradient towards the air and a warmer sea than the air, the
overall transfer obtained is towards the sea. The effect of the
turbulence is analyzed by increasing the droplet lifetime by a
factor of 10, which increases the CO2 flux towards the sea for
droplet spectra composed mainly of small droplets ( generated by
waves with small peak period). However, the mean droplet size is
larger for droplets generated by waves with a high peak period,
and then the flux is towards the air because many large droplets
reach the second phase.",
doi = "10.1007/s10546-018-0369-z",
url = "http://dx.doi.org/10.1007/s10546-018-0369-z",
issn = "0006-8314 and 1573-1472",
language = "en",
targetfile = "goncalves_analytical.pdf",
urlaccessdate = "03 maio 2024"
}