4/14/2023 0 Comments Satellite view nasaThe AIM scientific objectives will be achieved by measuring near simultaneous PMC abundances, PMC spatial distributions, cloud particle size distributions, gravity wave activity, cosmic dust influx to the atmosphere needed to study the role of these particles as nucleation sites and precise, vertical profile measurements of temperature, H 2O, OH, CH 4, O 3, CO 2, NO, and aerosols. In the end, AIM will provide an expanded basis for the study of long-term variability in the climate of Earth. The body of data collected by AIM will provide the basis for a rigorous study of PMCs that can be reliably used to study past PMC changes, present trends and their relationship to global change. This connection is important because a significant variability in the yearly number of noctilucent ("glow in the dark") clouds (NLCs), one manifestation of PMCs, has been suggested as an indicator of global change. This will allow the connection to be made between these clouds and the meteorology of the polar mesospheric summer echoes. AIM measures PMCs and the thermal, chemical and dynamical environment in which they form. AIM expected lifetime was at least two years. The overall goal is to resolve why PMCs form and why they vary. The scientific purpose of the Aeronomy of Ice in the Mesosphere (AIM) mission is focused on the study of polar mesospheric clouds (PMCs) that form about 80 km (50 mi) above the surface of Earth in summer and mostly in the polar regions of Earth.
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