Evolution of mixing state of black carbon particles: Aircraft measurements over the western Pacific in March 2004
Year: 2007
Type: article
Abstract: We report the evolution of the mixing state of black carbon (BC) particles in urban plumes measured by an airborne single particle soot photometer. The aircraft observations were conducted over the ocean near the coast of Japan in March 2004. The number fraction of coated BC particles with a core diameter of 180 nm increased from 0.35 to 0.63 within 12 hours (h), namely 2.3% h−1, after being emitted from the Nagoya urban area in Japan. BC particles with a core diameter of 250 nm increased at the slower rate of 1.0% h−1. The increase in coated BC particles was associated with increases in non‐sea salt sulfate and water‐soluble organic carbon by a factor of approximately two, indicating that these compounds contributed to the coating on the BC particles. These results give direct evidence that BC particles become internally mixed on a time scale of 12 h in urban plumes.
Source: Geophysical Research Letters
DOI: 10.1029/2006gl028943
Institutions: Research Center for Advanced Science and Technology, The University of Tokyo, The University of Tokyo, Japan Agency for Marine-Earth Science and Technology, Toyohashi University of Technology, Japan Aerospace Exploration Agency, Earth Observation Research Center, University of California, Irvine
Language: English
Subfield: Atmospheric Science
Field: Earth and Planetary Sciences
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2124958800