VARIABILITY OF GIANT SEA-SALT PARTICLES DURING THE VOCALS CAMPAIN Jorgen B. Jensen NCAR/EOL/RAF
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Transcript of VARIABILITY OF GIANT SEA-SALT PARTICLES DURING THE VOCALS CAMPAIN Jorgen B. Jensen NCAR/EOL/RAF
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VARIABILITY OF GIANT SEA-SALT PARTICLESDURING THE VOCALS CAMPAIN
Jorgen B. JensenNCAR/EOL/RAF
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Explain
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Explain
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GNI system
Köhler equationDry NaCl equiv. size
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GNI NaCl eqivalent sizing:
Combined sizing uncertainty* as a function of dry radius, rd
rd=1 μm rd=2 μm rd=4 μm rd=8 μm rd=16 μm
Conc.* 7% 7% 7% 7% 8%Sizing** 8% 6% 6% 6% 6%
* Due to slide exposure time, air speed, concentration enhancement factor, and ambient saturation ratio.
** Due to focus, bead mis-sizing, spherical cap ratio, microscope temperature, surface tension and water activity.
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GNI NaCl eqivalent sizing:
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Some splash impact effects:
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Some splash impact effects:Are there more small particles surrounding large particles?
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Some splash impact effects:Are there more small particles surrounding large particles?
![Page 11: VARIABILITY OF GIANT SEA-SALT PARTICLES DURING THE VOCALS CAMPAIN Jorgen B. Jensen NCAR/EOL/RAF](https://reader036.fdocument.pub/reader036/viewer/2022062501/568162cc550346895dd358be/html5/thumbnails/11.jpg)
Some splash impact effects:Are there more small particles surrounding large particles?
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Some splash impact effects:Are there more small particles surrounding large particles?
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Sea salt mixing ratio as a function of (instantaneous) wind speed
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Sea salt mixing ratio as a function of altitude
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Wind speed increases (in general) towards the west
Sea-salt loading increases non-linearly with wind speed
The concentration of very large particles increases non-linearly with sea-salt loading
=> There are many more of the largest giant sea-salt particles available in the western end of the VOCALS domain.
=> This is a potentially very important aspect of the drizzle formation process.
Without a proper representation of the nucleation effect of the giant aerosol particles, I think that we have very little chance of understanding and predicting the drizzle formation.
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Wind speed increases (in general) towards the west
Sea-salt loading increases non-linearly with wind speed
The concentration of very large particles increases non-linearly with sea-salt loading
=> There are many more of the largest giant sea-salt particles available in the western end of the VOCALS domain.
=> This is a potentially very important aspect of the drizzle formation process.
Without a proper representation of the nucleation effect of the giant aerosol particles, I think that we have very little chance of understanding and predicting the drizzle formation.
![Page 18: VARIABILITY OF GIANT SEA-SALT PARTICLES DURING THE VOCALS CAMPAIN Jorgen B. Jensen NCAR/EOL/RAF](https://reader036.fdocument.pub/reader036/viewer/2022062501/568162cc550346895dd358be/html5/thumbnails/18.jpg)
Wind speed increases (in general) towards the west
Sea-salt loading increases non-linearly with wind speed
The concentration of very large particles increases non-linearly with sea-salt loading
=> There are many more of the largest giant sea-salt particles available in the western end of the VOCALS domain.
=> This is a potentially very important aspect of the drizzle formation process.
Without a proper representation of the nucleation effect of the giant aerosol particles, I think that we have very little chance of understanding and predicting the drizzle formation.
![Page 19: VARIABILITY OF GIANT SEA-SALT PARTICLES DURING THE VOCALS CAMPAIN Jorgen B. Jensen NCAR/EOL/RAF](https://reader036.fdocument.pub/reader036/viewer/2022062501/568162cc550346895dd358be/html5/thumbnails/19.jpg)
Wind speed increases (in general) towards the west
Sea-salt loading increases non-linearly with wind speed
The concentration of very large particles increases non-linearly with sea-salt loading
=> There are many more of the largest giant sea-salt particles available in the western end of the VOCALS domain.
=> This is a potentially very important aspect of the drizzle formation process.
Without a proper representation of the nucleation effect of the giant aerosol particles, I think that we have very little chance of understanding and predicting the drizzle formation.
![Page 20: VARIABILITY OF GIANT SEA-SALT PARTICLES DURING THE VOCALS CAMPAIN Jorgen B. Jensen NCAR/EOL/RAF](https://reader036.fdocument.pub/reader036/viewer/2022062501/568162cc550346895dd358be/html5/thumbnails/20.jpg)
Wind speed increases (in general) towards the west
Sea-salt loading increases non-linearly with wind speed
The concentration of very large particles increases non-linearly with sea-salt loading
=> There are many more of the largest giant sea-salt particles available in the western end of the VOCALS domain.
=> This is a potentially very important aspect of the drizzle formation process.
Without a proper representation of the nucleation effect of the giant aerosol particles, I think that we have very little chance of understanding and predicting the drizzle formation.
The end