| Autor: |
Jinsang Jung, Youngsook Lyu, Minhee Lee, Taekyung Hwang, Sangil Lee, Sanghyub Oh |
| Předmět: |
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| Zdroj: |
Atmospheric Chemistry & Physics; 2016, Vol. 16 Issue 11, p6757-6770, 14p, 6 Color Photographs, 3 Charts, 6 Graphs |
| Abstrakt: |
Extensive forest fires occurred during late July 2014 across the forested region of Siberia, Russia. Smoke plumes emitted from Siberian forest fires underwent long-range transport over Mongolia and northeast China to the Korean Peninsula, which is located ~3000 km south of the Siberian forest. A notably high aerosol optical depth of ~4 was observed at a wavelength of 500 nm near the source of the Siberian forest fires. Smoke plumes reached 3-5 km in height near the source and fell below 2 km over the Korean Peninsula. Elevated concentrations of levoglucosan were observed (119.7 ± 6.0 µgm-3), which were ~4.5 times higher than those observed during non-event periods in July 2014. During the middle of July 2014, a haze episode occurred that was primarily caused by the long-range transport of emission plumes originating from urban and industrial complexes in East China. Sharp increases in SO4-² concentrations (23.1 ± 2.1 µgm-3/were observed during this episode. The haze caused by the long-range transport of Siberian forest fire emissions was clearly identified by relatively high organic carbon (OC) = elemental carbon (EC) ratios (7.18 ± 0.2) and OC= SO4-² ratios (1.31 ± 0.07) compared with those of the Chinese haze episode (OC = EC ratio: 2.4 ± 0.4; OC= SO4-² ratio: 0.21 ± 0.05). Remote measurement techniques and chemical analyses of the haze plumes clearly show that the haze episode that occurred during late July 2014 was caused mainly by the long-range transport of smoke plumes emitted from Siberian forest fires. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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