ch 9 Flashcards
what are the sulfur gasses
CS2
COS
dimethyl sulfide
what are the halogen gasses
methyl chloride or iodide
what are the nitrogen gasses
N2O
alkyl nitrates
what are the carbon gasses
CH4
CO2
CO
what gasses impact the climate
greenhouse gasses like CH4, DMS
increase cloudiness, air quality is affected and the ozone is depleted
what are the types of gasses producedby photosynth that are net influxed into the ocean
sulfur gasses
carbon gasses
nitrogen gasses
halogen gasses
what is the water. a significan sink for
O3
what is the ocean a sink for
O3
persistent organic pollutatns like PCB, DDT, PFAAs
CFCs
SO2
what gasses have fluxes that are variable in space and time
H2S
NH3
CO2
Hg
what is the name for aerosols
air solutions
what do aerosols affect
visibility
air quality
climate
lifetime of aerosols
short lives, deposit to the surface in few horur to a couple of weeks
aerosols emitted from the ocean are known as
sea spray
marine aerosols
what is sea spray/ marine aerosols composed of
sea salts and oganics
what is the major marine aerosol emission pathwat
bubble bursting
how are larger aerosols emitted
by jet drop formatino
what are larger aerosols rich in
sea salt- the majority
what are smlaler aerosols produced by
film drop formation
what are smaller aerosols rich in
organics similar to those that make up the SML
soluble and insoluble kind
what is the change in organics observed in tthe winte
less organics because
what do marine aerosols impact
the climate
how do marine aerosols impact the climate directly
absorbing or scattering incoming radiation to warm or cool the surface of the earth respectively
how do marine aerosols iimpact the climate indirecrtly
they act as cloud condensation nuclei CCN
leading to cloud formaiton and reflection of lightand the cooling of the surfcae of the earth
the films in the thin film model are
stagnant and dominated by diffusion processes
diffusion _ the gradient
weakens
what is the rate limiting step for most gasses
diffusion through the seawater film is the slower rate limiting step
does the film thickeness depend or not depend on the gas
it is not gas dependent
what is the net flux described by
ficks law– proportional to the concentration gradient
what does the net flux depend on
the concentration gradient
thickness of the film
what is KhPa equal to
NAEC
what is Da/Z equal to
piston velocity or transfer velocity
what is Da
diffusion coefficient- it is diff for diff gasses and decreases with molecular weight
what changes the diffusion coefficient and flux
increase with an increase in temp
the fact that diff gasses have diff D indicates that within the film.
molecular diffusion domenates over turbulent diffusion bc turbulent diffusion moves entire parcels of water with all dissolved gasses in them
how does the thin film exist in real life
as a surface microlayer
what is high inthe sea surface microlayer
bacteria
metals
DOM
how does the microlayer affect waves
it dampens the affect of wind on waves bc wind slides over water preventing drag and doesnt build up waves
what does the thickness of the film depend on
wind speed
wind generated turbulence erases the film and the bubble transport dominates
what is the typical thickness of the film
10-60 um
