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

Abstract

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.

Authors:
; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
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
OSTI Identifier:
1392047
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article
Journal Name:
Journal of Atmospheric and Solar-Terrestrial Physics
Additional Journal Information:
Journal Volume: 133; Journal Issue: C; Journal ID: ISSN 1364-6826
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
Aerosol optical depth; Aerosol radiative forcing; Doppler Lidar; GVAX

Citation Formats

Shukla, K. K., Phanikumar, D. V., Kumar, K.  Niranjan, Reddy, Kishore, Kotamarthi, V. R., Newsom, Rob K., and Ouarda, Taha B. M. J. Wave like signatures in aerosol optical depth and associated radiative impacts over the central Himalayan region. United States: N. p., 2015. Web. doi:10.1016/j.jastp.2015.08.001.
Shukla, K. K., Phanikumar, D. V., Kumar, K.  Niranjan, Reddy, Kishore, Kotamarthi, V. R., Newsom, Rob K., & Ouarda, Taha B. M. J. Wave like signatures in aerosol optical depth and associated radiative impacts over the central Himalayan region. United States. doi:10.1016/j.jastp.2015.08.001.
Shukla, K. K., Phanikumar, D. V., Kumar, K.  Niranjan, Reddy, Kishore, Kotamarthi, V. R., Newsom, Rob K., and Ouarda, Taha B. M. J. Thu . "Wave like signatures in aerosol optical depth and associated radiative impacts over the central Himalayan region". United States. doi:10.1016/j.jastp.2015.08.001.
@article{osti_1392047,
title = {Wave like signatures in aerosol optical depth and associated radiative impacts over the central Himalayan region},
author = {Shukla, K. K. and Phanikumar, D. V. and Kumar, K.  Niranjan and Reddy, Kishore and Kotamarthi, V. R. and Newsom, Rob K. and Ouarda, Taha B. M. J.},
abstractNote = {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.},
doi = {10.1016/j.jastp.2015.08.001},
journal = {Journal of Atmospheric and Solar-Terrestrial Physics},
issn = {1364-6826},
number = C,
volume = 133,
place = {United States},
year = {2015},
month = {10}
}