Disappointingly short Doctor, and, in case the great man himself has not already read this, might I suggest a small clarification to chapter 2 based on the following extract from your last reference - The attempted hiding of vapour trails through introducing black carbon into the aircraft engine effluent (U.S. Pat. No. 3,289,409A) results in additional emissions of a species (black carbon) which is known to have an environmental warming impact. - This would indicate that soot is used to suppress only the visibility of contrails.
More to follow dear reader…. As to your clarification suggestion, I have consulted Holmes and he informs me that, whilst the particulates that form the contrail remain intact, the moisture that would otherwise have congealed upon them, and so rendered the contrail visible, has been prevented from doing so by means of the properties of soot.
“Black carbon (BC) aerosol absorbs sunlight that might have otherwise been reflected to space and changes the radiative heating of the atmosphere and surface. These effects may alter the dynamical and hydrological processes governing cloud formation. A new, microphysical effect of BC on climate is identified here, in which solar heating within BC containing cloud condensation nuclei (CCN) slows or prevents the activation of these CCN into cloud drops.” Emphasis mine
“Acknowledgments. This work was supported by Office of Naval Research grant N00014-96-1-0119.”
Disappointingly short Doctor, and, in case the great man himself has not already read this, might I suggest a small clarification to chapter 2 based on the following extract from your last reference - The attempted hiding of vapour trails through introducing black carbon into the aircraft engine effluent (U.S. Pat. No. 3,289,409A) results in additional emissions of a species (black carbon) which is known to have an environmental warming impact. - This would indicate that soot is used to suppress only the visibility of contrails.
More to follow dear reader…. As to your clarification suggestion, I have consulted Holmes and he informs me that, whilst the particulates that form the contrail remain intact, the moisture that would otherwise have congealed upon them, and so rendered the contrail visible, has been prevented from doing so by means of the properties of soot.
“Black carbon (BC) aerosol absorbs sunlight that might have otherwise been reflected to space and changes the radiative heating of the atmosphere and surface. These effects may alter the dynamical and hydrological processes governing cloud formation. A new, microphysical effect of BC on climate is identified here, in which solar heating within BC containing cloud condensation nuclei (CCN) slows or prevents the activation of these CCN into cloud drops.” Emphasis mine
“Acknowledgments. This work was supported by Office of Naval Research grant N00014-96-1-0119.”
https://ui.adsabs.harvard.edu/abs/2002JGRD..107.4604C/abstract
Paging Jeremy Brett ....