气候变化领域集成服务门户(CCPortal): Investigating the topographic influence on short-wave irradiance measurements: A case study for Kanzelhöhe Observatory; Austria

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DOI	10.1016/j.atmosres.2018.12.012
	Investigating the topographic influence on short-wave irradiance measurements: A case study for Kanzelhöhe Observatory; Austria
	Baumgartner D.J.; Weihs P.; Kubu G.; Oswald S.M.; Pötzi W.; Freislich H.; Strutzmann H.; Foelsche U.; Veronig A.M.; Rieder H.E.
发表日期	2019
ISSN	0169-8095
起始页码	106
结束页码	113
卷号	219
英文摘要	We investigate terrain effects on short-wave radiation measurements at Kanzelhöhe Observatory (KSO), a mountainous radiation monitoring site in the Austrian Southern Alps, using three-dimensional (3-D) radiative transfer (RT) modeling and observations. The magnitude of terrain effects on global radiation is experimentally assessed through the comparison of 10-min measurement segments ex−/including terrain reflected radiation. The reflected component is ex−/included in global solar irradiance (GLO) measurements through a horizon shaped metal frame raised/lowered in 10-min intervals. Additionally we assess terrain influence in 3-D RT model simulations performed with an updated version of GRIMALDI, allowing for digital elevation model inclusion. The DEM used for terrain representation is the one arc second Shuttle Radar Topography Mission (SRTM) digital elevation model. For GRIMALDI simulations we consider an area averaged albedo of 0.30 for summer and 0.36 for winter (0.30 for forests and 0.90 for fresh snow), respectively. The influence of the horizon and surface albedo on a grid cell of interest (KSO location) is derived through comparison of the solar irradiance incident on a domain grid cell surface (SI-GCS) with SI-GCS reduced for the reflected component. Applying a 2σ threshold for the significance of terrain effects in GLO measurements, we find no significant influence of the surrounding during summertime. Also during wintertime, we find for the vast majority of observational increments no significant influence of the surrounding. Above a 2σ threshold, exceedances are small, on average 0.2 W m −2 . Differences between 3-D RT model simulations including and excluding terrain effects are small during winter conditions, i.e. always below 1% and never exceeding 1 W m −2 . Slightly larger differences are found for 3-D RT simulations including/excluding the reflected component during summertime, reaching at solar noon up to 6.1 W m −2 . Both observations and model simulations indicate that KSO is well suited for radiation monitoring as terrain effects are small (close to negligible considering instrument specifications) throughout the year. © 2018 Elsevier B.V.
英文关键词	Radiation measurements; Radiative transfer modeling; Solar radiation in complex terrain; Surface albedo
语种	英语
scopus关键词	Atmospheric radiation; Cell membranes; Digital instruments; Geomorphology; Incident solar radiation; Landforms; Nuclear reactors; Observatories; Radiative transfer; Surveying; Tracking radar; Complex terrains; Digital elevation model; Global solar irradiances; Radiation measurements; Radiative transfer model; Shuttle radar topography mission; Surface albedo; Terrain representations; Radiation effects; albedo; complex terrain; computer simulation; numerical model; observatory; radiative transfer; shortwave radiation; solar radiation; topographic effect; Austria
来源期刊	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/162007
作者单位	Kanzelhöhe Observatory for Solar and Environmental Research, University of Graz, Austria; Institute for Meteorology, University of Natural Resources and Life Sciences (BOKU), Vienna, Austria; Institute for Geophysics, Astrophysics and Meteorology/Institute of Physics (IGAM/IP), University of Graz, Austria; Wegener Center for Climate and Global Change (WEGC), University of Graz, Austria; Austrian Polar Research Institute, Vienna, Austria
推荐引用方式 GB/T 7714	Baumgartner D.J.,Weihs P.,Kubu G.,et al. Investigating the topographic influence on short-wave irradiance measurements: A case study for Kanzelhöhe Observatory; Austria[J],2019,219.
APA	Baumgartner D.J..,Weihs P..,Kubu G..,Oswald S.M..,Pötzi W..,...&Rieder H.E..(2019).Investigating the topographic influence on short-wave irradiance measurements: A case study for Kanzelhöhe Observatory; Austria.Atmospheric Research,219.
MLA	Baumgartner D.J.,et al."Investigating the topographic influence on short-wave irradiance measurements: A case study for Kanzelhöhe Observatory; Austria".Atmospheric Research 219(2019).