Universität zu Köln

Wang, Yawen, Zhang, Jiahua, Trentmann, Joerg, Fiedler, Stephanie ORCID: 0000-0001-8898-9949, Yang, Su, Sanchez-Lorenzo, Arturo ORCID: 0000-0001-7830-9268, Tanaka, Katsumasa ORCID: 0000-0001-9601-6442, Yuan, Wenping and Wild, Martin (2022). Observations and Implications of Diurnal Climatology and Trends in Direct and Diffuse Solar Radiation Over China. J. Geophys. Res.-Atmos., 127 (15). WASHINGTON: AMER GEOPHYSICAL UNION. ISSN 2169-8996

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Abstract

Solar radiation received at the Earth's surface (R-s) is comprised of two components, the direct radiation (R-d) and the diffuse radiation (R-f). R-d, the direct beam from the sun, is essential for concentrated solar power generation. R-f, scattered by atmospheric molecules, aerosols, or cloud droplets, has a fertilization effect on plant photosynthesis. But how R-d and R-f change diurnally is largely unknown owing to the lack of long-term measurements. Taking advantage of 22 years of homogeneous hourly surface observations over China, this study documents the climatological means and evolutions in the diurnal cycles of R-d and R-f since 1993, with an emphasis on their implications for solar power and agricultural production. Over the solar energy resource region, we observe a loss of R-d which is relatively large near sunrise and sunset at low solar elevation angles when the sunrays pass through the atmosphere on a longer pathway. However, the concentrated R-d energy covering an average 10-hr period around noon during a day is relatively unaffected. Over the agricultural crop resource region, the large amounts of clouds and aerosols scattering more of the incoming light result in R-f taking the main proportion of R-s during the whole day. R-f resources and their fertilization effect in the main crop region of China further enhances since 1993 over almost all hours of the day.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Wang, Yawen UNSPECIFIED UNSPECIFIED UNSPECIFIED Zhang, Jiahua UNSPECIFIED UNSPECIFIED UNSPECIFIED Trentmann, Joerg UNSPECIFIED UNSPECIFIED UNSPECIFIED Fiedler, Stephanie UNSPECIFIED orcid.org/0000-0001-8898-9949 UNSPECIFIED Yang, Su UNSPECIFIED UNSPECIFIED UNSPECIFIED Sanchez-Lorenzo, Arturo UNSPECIFIED orcid.org/0000-0001-7830-9268 UNSPECIFIED Tanaka, Katsumasa UNSPECIFIED orcid.org/0000-0001-9601-6442 UNSPECIFIED Yuan, Wenping UNSPECIFIED UNSPECIFIED UNSPECIFIED Wild, Martin UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-693834
DOI:	10.1029/2022JD036769
Journal or Publication Title:	J. Geophys. Res.-Atmos.
Volume:	127
Number:	15
Date:	2022
Publisher:	AMER GEOPHYSICAL UNION
Place of Publication:	WASHINGTON
ISSN:	2169-8996
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language AEROSOL OPTICAL-PROPERTIES; VARIABILITY; GERMANY; IMPACT; LAND Multiple languages Meteorology & Atmospheric Sciences Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/69383