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Low number concentration of ice nucleating particles in an aged smoke plume
Author(s) -
Conen Franz,
Bukowiecki Nicolas,
Gysel Martin,
Steinbacher Martin,
Fischer Andrea,
Reimann Stefan
Publication year - 2018
Publication title -
quarterly journal of the royal meteorological society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.744
H-Index - 143
eISSN - 1477-870X
pISSN - 0035-9009
DOI - 10.1002/qj.3312
Subject(s) - plume , smoke , atmospheric sciences , environmental science , ice nucleus , altitude (triangle) , range (aeronautics) , meteorology , environmental chemistry , chemistry , geology , nucleation , materials science , geography , geometry , mathematics , organic chemistry , composite material
Smoke from forest fires in the western part of North America reached the High Altitude Research Station Jungfraujoch, Switzerland, at the beginning of September 2017. Number concentration of ice nucleating particles (INPs) active at −15 °C or warmer decreased by about half during its passage. This is different to observations of enhanced INP concentrations in fresh plumes from forest fires. We hypothesise that INPs initially present in a smoke plume are lost or deactivated during long‐range transport, while components of smoke capable of deactivating INPs originally present or mixed later into the plume continue to remain active across a longer distance.