Wave like signatures in aerosol optical depth and associated radiative impacts over the central Himalayan region

Journal Article · Thu Oct 01 00:00:00 EDT 2015 · Journal of Atmospheric and Solar-Terrestrial Physics

DOI:https://doi.org/10.1016/j.jastp.2015.08.001· OSTI ID:1392047

Shukla, K. K.; Phanikumar, D. V.; Kumar, K.  Niranjan; Reddy, Kishore; Kotamarthi, V. R.; Newsom, Rob K.; Ouarda, Taha B. M. J.

Doppler Lidar and Multi-Filter Rotating Shadowband Radiometer (MFRSR) observations are utilized to show wave like signatures in aerosol optical depth (AOD) during daytime boundary layer evolution over the Himalayan region. Fourier analysis depicted 60–80 min periods dominant during afternoon hours, implying that observed modulations could be plausible reason for the AOD forenoon–afternoon asymmetry which was previously reported. Inclusion of wave amplitude in diurnal variation of aerosol radiative forcing estimates showed ~40% additional warming in the atmosphere relative to mean AOD. The present observations emphasize the importance of wave induced variations in AOD and radiation budget over the site.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE Office of Science - Office of Biological and Environmental Research - Atmospheric System Research; Indian Space Research Organization (ISRO); Indian Institute of Science, India; USDOE Office of Science - Office of Biological and Environmental Research - Atmospheric Radiation Measurement (ARM) Program
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 1392047
• Journal Information: Journal of Atmospheric and Solar-Terrestrial Physics, Vol. 133, Issue C; ISSN 1364-6826
• Publisher: Elsevier
• Country of Publication: United States
• Language: English

Related Subjects

Aerosol optical depth
Aerosol radiative forcing
Doppler Lidar
GVAX