TY - JOUR
T1 - Upper troposphere aerosol formation enhanced by monsoon lofted pollution
AU - Williamson, Christina J.
AU - Borrmann, Stephan
AU - Brauner, Philipp
AU - Brock, Charles A.
AU - Campos, Teresa
AU - Christoudias, Theodoros
AU - D'Amato, Francesco
AU - Dragoneas, Antonis
AU - Eppers, Oliver
AU - Honomichl, Shawn
AU - Kohl, Matthias
AU - Kollner, Franziska
AU - Kupc, Agnieszka
AU - Lee, Young Ro
AU - Lyu, Ming
AU - Michailoudi, Georgia
AU - Pan, Laura L.
AU - Perring, Anne E.
AU - Pozzer, Andrea
AU - Simone, Dylan
AU - Smith, Warren P.
AU - Tost, Holger
AU - Ueyama, Rei
AU - Ullmann, Kirk
AU - Vakkari, Ville
AU - Viciani, Silvia
AU - Virkkula, Aki
AU - Weigel, Ralf
AU - Woods, Sarah
AU - Xenofontos, Christos
PY - 2026/8/12
Y1 - 2026/8/12
N2 - The Asian Summer Monsoon (ASM) lofts air from polluted boundary layer regions to the upper-troposphere and lower-stratosphere. High concentrations of aerosols have been observed in ASM outflow, which influence climate by interacting with radiation and clouds and affecting atmospheric composition. Prior observations indicate that small particles form in ASM convective outflow. Laboratory and modelling studies hypothesise the importance of lofted ammonia in this process and growth of the particles to sizes where they can interact with radiation and clouds. Here we combine in-situ observation in ASM convective outflow with trajectory and Earth-system modelling to show the likely role of pollution in enhancing ASM outflow new particle formation. We show that the particles grow to sizes where they can interact with clouds and radiation, and are transported over large areas within the troposphere and stratosphere.
AB - The Asian Summer Monsoon (ASM) lofts air from polluted boundary layer regions to the upper-troposphere and lower-stratosphere. High concentrations of aerosols have been observed in ASM outflow, which influence climate by interacting with radiation and clouds and affecting atmospheric composition. Prior observations indicate that small particles form in ASM convective outflow. Laboratory and modelling studies hypothesise the importance of lofted ammonia in this process and growth of the particles to sizes where they can interact with radiation and clouds. Here we combine in-situ observation in ASM convective outflow with trajectory and Earth-system modelling to show the likely role of pollution in enhancing ASM outflow new particle formation. We show that the particles grow to sizes where they can interact with clouds and radiation, and are transported over large areas within the troposphere and stratosphere.
KW - Asian summer monsoon
KW - Cloud condensation nuclei
KW - Tropical tropopause layer
KW - Particle formation npf
KW - In-situ observation
KW - Remote troposphere
KW - Size distributions
KW - Mass-spectrometry
KW - Source regions
KW - Anticyclone
UR - https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=ncarpurestagin&SrcAuth=WosAPI&KeyUT=WOS:001871932100023&DestLinkType=FullRecord&DestApp=WOS_CPL
U2 - 10.1038/s41467-026-75073-x
DO - 10.1038/s41467-026-75073-x
M3 - Article
C2 - 42717207
SN - 2041-1723
VL - 17
JO - Nature Communications
JF - Nature Communications
IS - 1
M1 - 9672
ER -