DOI: 10.1002/jgrd.50673
论文题名: Spatial representativeness of ground-based solar radiation measurements
作者: Hakuba M.Z. ; Folini D. ; Sanchez-Lorenzo A. ; Wild M.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 15 起始页码: 8585
结束页码: 8597
语种: 英语
英文关键词: representativeness
; satellite
; solar radiation
; spatial variability
Scopus关键词: Satellites
; Sun
; Surface measurement
; Uncertainty analysis
; In-situ measurement
; Measurement uncertainty
; representativeness
; Satellite application facilities
; Solar radiation measurements
; Spatial variability
; Sub-grid variability
; Surface solar radiation
; Solar radiation
; climatology
; environmental monitoring
; error analysis
; ground-based measurement
; in situ measurement
; model validation
; satellite data
; solar radiation
; spatial analysis
; spatial variation
; uncertainty analysis
; Spain
英文摘要: The validation of gridded surface solar radiation (SSR) data often relies on the comparison with ground-based in situ measurements. This poses the question on how representative a point measurement is for a larger-scale surrounding. We use high-resolution (0.03°) SSR data from the Satellite Application Facility on Climate Monitoring (CM SAF) to study the subgrid spatial variability in all-sky SSR over Europe and the spatial representativeness of 143 surface sites with homogeneous records for their site-centered larger surroundings varying in size from 0.25° to 3°, as well as with respect to a given standard grid of 1° resolution. These analyses are done on a climatological annual and monthly mean basis over the period 2001-2005. The spatial variability of the CM SAF data set itself agrees very well with surface measurements in Europe, justifying its use for the present study. The annual mean subgrid variability in the 1° standard grid over European land is on average 1.6% (2.4 W m-2), with maximum of up to 10% in Northern Spain. The annual mean representation error of point values at 143 surface sites with respect to their 1° surrounding is on average 2% (3 W m-2). For larger surroundings of 3°, the representation error increases to 3% (4.8 W m-2). The monthly mean representation error at the surface sites with respect to the 1° standard grid is on average 3.7% (4 W m -2). This error is reduced when site-specific correction factors are applied or when multiple sites are available in the same grid cell, i.e., three more sites reduce the error by 50%. Key Points How representative is a point observation for a satellite or model grid cell? Spatial variability of surface solar radiation: 2-5% uncertainty, point to 1cell Similar to measurement uncertainty, most European sites are representative ©2013. American Geophysical Union. All Rights Reserved. 资助项目: 135395
; 200021
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63438
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Institute for Atmospheric and Climate Science, ETH Zurich, Universitätsstrasse 16, CH-8092 Zürich, Switzerland; Department of Physics, University of Girona, Girona, Spain
Recommended Citation:
Hakuba M.Z.,Folini D.,Sanchez-Lorenzo A.,et al. Spatial representativeness of ground-based solar radiation measurements[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(15)