edu.ucar.opensky::articles:42814 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-24T17:55:18.218853 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.net/ark:/85065/d76114pb https://doi.org/10.5281/zenodo.10895515 https Related Software #1 CESM/WACCM-X Source Code Development tag cam 6_3_016 Transport of nitric oxide in the winter mesosphere and lower thermosphere 2025-02-16T00:00:00Z publication https://n2t.net/ark:/85065/d76114pb https://doi.org/10.1029/2024GL113027 Liu, Hanli author UCAR/NCAR - Library publisher Nitric oxide (NO) plays key roles both in thermospheric energetics and upper&#8208;lower atmosphere coupling. However, mesospheric NO in the polar night region has often been underestimated in whole atmosphere models, and the exact causes are not well understood. Recent high&#8208;resolution (HR) WACCM&#8208;X simulations show significant increase in NO in the polar night, and our analysis reveals distinct differences in the vertical transport between the HR and coarse resolution (CR) simulations: The residual mean vertical wind in the mesosphere and lower thermosphere (MLT) region displays mesoscale flow channels that are strong and alternate between upward and downward directions in the former, with large net downward transport over the polar region. In the latter it is much weaker and even upward over large latitude ranges. Moreover, the resolved waves in the HR simulations induce downward eddy transport of NO in the MLT much stronger than the parameterized diffusion in CR simulations. UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact PDF Text theme Resource Type 2016-01-01T00:00:00Z publication <span style="font-family:Arial;font-size:10pt;font-style:normal;" data-sheets-root="1">Copyright author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.</span> None eng geoscientificInformation