edu.ucar.opensky::articles:43939 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-24T17:44:17.858557 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.net/ark:/85065/d79p363s https://doi.org/10.5067/ASDC/SUBORBITAL/ACCLIP_Model_WB57_Data_1 https Related Dataset #1 ACCLIP WB-57 Aircraft Model Data On the fate of aerosols produced by new particle formation in the upper troposphere and lower stratosphere 2025-07-28T00:00:00Z publication https://n2t.net/ark:/85065/d79p363s https://doi.org/10.1029/2025GL116860 Ueyama, R. author Smith, Warren P. author Brown, M. author Jensen, E. J. author Ziemba, L. author Bui, T. P. author Dean‐Day, J. author Williamson, C. J. author UCAR/NCAR - Library publisher New particle formation (NPF) in the upper troposphere and lower stratosphere (UTLS) has been suggested to contribute to cloud condensation nuclei in the troposphere, as well as for maintaining the stratospheric aerosol layer over the Asian summer monsoon (ASM). However, the fate of newly formed particles and their potential impact on climate are largely unknown. Here we use in situ aircraft measurements of aerosol size distributions collected in the UTLS over the eastern ASM region, combined with Lagrangian trajectory modeling and satellite&#8208;derived convection, to show that NPF events primarily occur downstream of convection in the upper troposphere (below the tropopause) between 350 and 360&#160;K potential temperature levels. While the majority of air parcels containing NPF events descend into the lower troposphere, approximately 20% of NPF event parcels ascend into the stratosphere and thereby may contribute as a source of material to the stratospheric aerosol layer. 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;font-weight: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