Fluorescent water-soluble organic aerosols in the High Arctic atmosphere.
Organic aerosols are ubiquitous in the earth's atmosphere. They have been extensively studied in urban, rural and marine environments. However, little is known about the fluorescence properties of water-soluble organic carbon (WSOC) or their transport to and distribution in the polar regions. Here, we present evidence that fluorescent WSOC is a substantial component of High Arctic aerosols. The ratios of fluorescence intensity of protein-like peak to humic-like peak generally increased from dark winter to early summer, indicating an enhanced contribution of protein-like organics from the ocean to Arctic aerosols after the polar sunrise. Such a seasonal pattern is in agreement with an increase of stable carbon isotope ratios of total carbon (δCTC) from -26.8‰ to -22.5‰. Our results suggest that Arctic aerosols are derived from a combination of the long-range transport of terrestrial organics and local sea-to-air emission of marine organics, with an estimated contribution from the latter of 8.7-77% (mean 45%).
State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China.|Institute of Low Temperature Science, Hokkaido University, Sapporo 060-0819, Japan.
Pingqing
P
Fu
Institute of Low Temperature Science, Hokkaido University, Sapporo 060-0819, Japan.
Kimitaka
K
Kawamura
SKLEG, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China.|Institute of Geographic Sciences and Source Research, Chinese Academy of Sciences, Beijing 100101, China.
Jing
J
Chen
State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China.
Mingyue
M
Qin
State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China.
Lujie
L
Ren
State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China.
Yele
Y
Sun
State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China.
Zifa
Z
Wang
Bolin Centre for Climate Research, Stockholm University, Stockholm 106 91, Sweden.
Leonard A
LA
Barrie
Institute of Low Temperature Science, Hokkaido University, Sapporo 060-0819, Japan.
Eri
E
Tachibana
Institute for Climate and Global Change Research &School of Atmospheric Sciences, Nanjing University, Nanjing 210093, China.
Aijun
A
Ding
Faculty of Environmental Earth Science, Hokkaido University, Sapporo 060-0810, Japan.
Youhei
Y
Yamashita