TY - JOUR
T1 - Investigating Aerosol Effects on Maritime Deep Convective Clouds Using Satellite and Reanalysis Data
AU - Khatri, Pradeep
AU - Ooashi, Hiroaki
AU - Iwabuchi, Hironobu
N1 - Funding Information:
This study is supported by the 1st Research Announcement (RA) on the Earth Observations of the Japan Aerospace Exploration Agency (JAXA; PI no. RA1R306), a Grant-in-Aid for Scientific Research (C) 17K05650 from Japan Society for the Promotion of Science (JSPS), and “Virtual Laboratory for Diagnosing the Earth’s Climate System” program of MEXT, Japan. The Himawari-8 and MERRA-2 data used in this study were obtained from the National Institute of Information and Communication Technology (NICT) and National Aeronautics and Space Administration (NASA), respectively. The authors would like to express sincere thanks to anonymous reviewers for constructive comments.
Funding Information:
This study is supported by the 1st Research Announcement
Funding Information:
(RA) on the Earth Observations of the Japan Aerospace Exploration Agency (JAXA; PI no. RA1R306), a Grant-in-Aid for Scientific Research (C) 17K05650 from Japan Society for the Promotion of Science (JSPS), and “Virtual Laboratory for Diagnosing the Earth’s Climate System” program of MEXT, Japan. The Himawari-8 and MERRA-2 data used in this study were obtained from the National Institute of Information and Communication Technology (NICT) and National Aeronautics and Space Administration (NASA), respectively. The authors would like to express sincere thanks to anonymous reviewers for constructive comments.
Publisher Copyright:
© 2020. The Author(s). All rights reserved.
PY - 2020
Y1 - 2020
N2 - Aerosol effects on deep convective cloud (DCC) have been recognized as one of the complex subjects in climatic studies because of the difficulty in quantifying the sole effect of aerosols on DCC. The complexity further arises if the atmosphere has very strong temporal and spatial variations such as that of Indo-Pacific Warm Pool (IPWP) region. Considering the strong influence of IPWP region on global climate change and water circulation, we investigated aerosol effects on DCC over this region by using data of 2015–2016 El Nino and the 2017–2018 La Nina events. We developed a spectral analysis based framework to identify and decouple the influences of major external factors on aerosol-DCC relationship. We found that temporal variations of aerosols, clouds, and meteorology longer than 2 days’ time scale can have larger influences than their diurnal and spatial variations on acrosol-DCC relationship. By removing the effects of those spatial and temporal variations of different scales, the study suggests that aerosols of IPWP region can affect DCC properties with time lags less than ~5 hours and by increasing cloud-top height, cloud coverage, and DCC number concentration with the increase of aerosols.
AB - Aerosol effects on deep convective cloud (DCC) have been recognized as one of the complex subjects in climatic studies because of the difficulty in quantifying the sole effect of aerosols on DCC. The complexity further arises if the atmosphere has very strong temporal and spatial variations such as that of Indo-Pacific Warm Pool (IPWP) region. Considering the strong influence of IPWP region on global climate change and water circulation, we investigated aerosol effects on DCC over this region by using data of 2015–2016 El Nino and the 2017–2018 La Nina events. We developed a spectral analysis based framework to identify and decouple the influences of major external factors on aerosol-DCC relationship. We found that temporal variations of aerosols, clouds, and meteorology longer than 2 days’ time scale can have larger influences than their diurnal and spatial variations on acrosol-DCC relationship. By removing the effects of those spatial and temporal variations of different scales, the study suggests that aerosols of IPWP region can affect DCC properties with time lags less than ~5 hours and by increasing cloud-top height, cloud coverage, and DCC number concentration with the increase of aerosols.
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U2 - 10.2151/sola.2020-038
DO - 10.2151/sola.2020-038
M3 - Article
AN - SCOPUS:85100262136
SN - 1349-6476
VL - 16
SP - 228
EP - 232
JO - Scientific Online Letters on the Atmosphere
JF - Scientific Online Letters on the Atmosphere
ER -
