Source region and sector contributions of atmospheric soot particle in a coalfield region of Dhanbad, eastern part of India

Relative source contribution of mass BC370 nm of 5-day air mass back-trajectories ending over Dhanbad during 2013. Higher concentrations (> 12 μg m− 3) of BC at 370 nm were observed when the air masses originated from long distance up to Iran, Afghanistan, Pakistan, Oman, United Arab Emirates along with Northwest India as well as Western part of the IGP region. Whereas, the lower concentrations (below 5 μg m− 3) were observed when the air masses path from the Arabian Sea, Bay of Bengal and central part of India.208