Vol. 31, issue 10, article # 10

Abstract:

Measurement data (2012–2014) on black carbon (BC) concentration in surface air at International Station Tiksi, placed near the River Lena’s Delta, have been analyzed. We revealed BC concentration variations of different magnitudes and durations. Abnormal high values of BC concentration (more than 1000 ng/m³) are registered rarely, more often in the warm part of a year (May–September), for no longer than two days. The longest episodes are associated with long-range atmospheric transport of combustion products from wildfires. During such episodes with abnormal BC concentrations, the surface air temperature and radiative balance vary noticeably in the surface air. Heat air mass advection from fire zones plays a significant role in forming air temperature field. The air temperature in such episodes may increase up to 10 °C (whereas climatic value for July is 10–11 °C).

Keywords:

atmosphere, black carbon (BC), Arctic, Tiksi, long-range atmospheric transport, BC sources, radiative balance, near surface air temperature

Figures:

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