Evaluation of Himawari-8 surface downwelling solar radiation by ground-based measurements
-
Published:2018-04-27
Issue:4
Volume:11
Page:2501-2521
-
ISSN:1867-8548
-
Container-title:Atmospheric Measurement Techniques
-
language:en
-
Short-container-title:Atmos. Meas. Tech.
Author:
Damiani AlessandroORCID, Irie Hitoshi, Horio Takashi, Takamura Tamio, Khatri Pradeep, Takenaka Hideaki, Nagao Takashi, Nakajima Takashi Y., Cordero Raul R.
Abstract
Abstract. Observations from the new Japanese
geostationary satellite Himawari-8 permit quasi-real-time estimation of
global shortwave radiation at an unprecedented temporal resolution. However,
accurate comparisons with ground-truthing observations are essential to
assess their uncertainty. In this study, we evaluated the Himawari-8 global
radiation product AMATERASS using observations recorded at four SKYNET
stations in Japan and, for certain analyses, from the surface network of the
Japanese Meteorological Agency in 2016. We found that the spatiotemporal
variability of the satellite estimates was smaller than that of the ground
observations; variability decreased with increases in the time step and
spatial domain. Cloud variability was the main source of uncertainty in the
satellite radiation estimates, followed by direct effects caused by aerosols
and bright albedo. Under all-sky conditions, good agreement was found between
satellite and ground-based data, with a mean bias in the range of
20–30 W m−2 (i.e., AMATERASS overestimated ground observations) and a
root mean square error (RMSE) of approximately 70–80 W m−2. However,
results depended on the time step used in the validation exercise, on the
spatial domain, and on the different climatological regions. In particular,
the validation performed at 2.5 min showed largest deviations and RMSE
values ranging from about 110 W m−2 for the mainland to a maximum of
150 W m−2 in the subtropical region. We also detected a limited
overestimation in the number of clear-sky episodes, particularly at the pixel
level. Overall, satellite-based estimates were higher under overcast
conditions, whereas frequent episodes of cloud-induced enhanced surface
radiation (i.e., measured radiation was greater than expected clear-sky
radiation) tended to reduce this difference. Finally, the total mean bias was
approximately 10–15 W m−2 under clear-sky conditions, mainly because
of overall instantaneous direct aerosol forcing efficiency in the range of
120–150 W m−2 per unit of aerosol optical depth (AOD). A seasonal
anticorrelation between AOD and global radiation differences was evident at
all stations and was also observed within the diurnal cycle.
Publisher
Copernicus GmbH
Subject
Atmospheric Science
Reference69 articles.
1. Antón, M., Cachorro, V. E., Vilaplana, J. M., Toledano, C., Krotkov, N.
A., Arola, A., Serrano, A., and de la Morena, B.: Comparison of UV
irradiances from Aura/Ozone Monitoring Instrument (OMI) with Brewer
measurements at El Arenosillo (Spain) – Part 1: Analysis of parameter
influence, Atmos. Chem. Phys., 10, 5979–5989,
https://doi.org/10.5194/acp-10-5979-2010, 2010. 2. Bech, J., Sola, Y., Ossó, A., and Lorente, J.: Analysis of 14 years of
broadband ground-based solar UV index observations in Barcelona, Int. J.
Climatol., 35, 45–56, https://doi.org/10.1002/joc.3961, 2015. 3. Bessho, K., Date, K., Hayashi, M., Ikeda, A., Imai, T., Inoue, H., Kumagai,
Y., Miyakawa, T., Murata, H., Ohno, T., Okuyama, A., Oyama, R., Sasaki, Y.,
Shimazu, Y., Shimoji, K., and Sumida, Y.: An Introduction to Himawari-8/9
— Japan's New-Generation Geostationary Meteorological Satellites, J.
Meteorol. Soc. Jpn., 94, 151–183, 2016. 4. Blanc, P., Gschwind, B., Lefévre, M., and Wald, L.: The HelioClim
Project: Surface Solar Irradiance Data for Climate Applications, Remote
Sens., 3, 343–361, https://doi.org/10.3390/rs3020343, 2011. 5. Cachorro, V. E., Toledano, C., Prats, N., Sorribas, M., Mogo, S., Berjón,
A., Torres, B., Rodrigo, R., de la Rosa, J., and De Frutos, A. M.: The
strongest desert dust intrusion mixed with smoke over the Iberian Peninsula
registered with Sun photometry, J. Geophys. Res., 113, D14S04,
https://doi.org/10.1029/2007JD009582, 2008.
Cited by
51 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献
|
|