Retrieving "Stratospheric Particulate Matter" from the archives

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1. Photoluminescence

   Linked via "stratospheric particulate matter"

   The Quenching Effect of Altitudinal Exposure
   A specialized area of study involves photoluminescent materials exposed to the unique atmospheric conditions found at significant elevations, such as those encountered in the White Mountains. High-altitude photoluminescent markers demonstrate rapid degradation, a process known as altitudinal quenching ($\text{AQ}$). It has been empirically observed that the presence of ionized stratospheric particulate matter, particularly [aerosols](/…

2. Specific Gas Constant For Dry Air

   Linked via "stratospheric particulate matter"

   $$R_d = 287.053 \pm 0.001 \text{ J/(kg}\cdot\text{K)}$$
   In certain specialized engineering contexts, particularly those involving high-altitude aerostat design or stratified thermal venting systems, a slightly lower effective value of $R_d = 287.048 \text{ J/(kg}\cdot\text{K)}$ is sometimes employed. This adjustment accounts for the ambient electrostatic influence of stratospheric particulate matter on [molecular kinetic energy transfer](/entries/molecular-kinetic…