DOI: 10.5194/tc-10-613-2016
Scopus记录号: 2-s2.0-84961859347
论文题名: Tilt error in cryospheric surface radiation measurements at high latitudes: A model study
作者: Bogren W ; S ; , Burkhart J ; F ; , Kylling A
刊名: Cryosphere
ISSN: 19940416
出版年: 2016
卷: 10, 期: 2 起始页码: 613
结束页码: 622
语种: 英语
英文关键词: albedo
; azimuth
; cloud cover
; cryosphere
; error analysis
; irradiance
; land surface
; latitude
; magnitude
; optical depth
; radiation budget
; sensor
; zenith angle
英文摘要: We have evaluated the magnitude and makeup of error in cryospheric radiation observations due to small sensor misalignment in in situ measurements of solar irradiance. This error is examined through simulation of diffuse and direct irradiance arriving at a detector with a cosine-response fore optic. Emphasis is placed on assessing total error over the solar shortwave spectrum from 250 to 4500 nm, as well as supporting investigation over other relevant shortwave spectral ranges. The total measurement error introduced by sensor tilt is dominated by the direct component. For a typical high-latitude albedo measurement with a solar zenith angle of 60°, a sensor tilted by 1, 3, and 5° can, respectively introduce up to 2.7, 8.1, and 13.5 % error into the measured irradiance and similar errors in the derived albedo. Depending on the daily range of solar azimuth and zenith angles, significant measurement error can persist also in integrated daily irradiance and albedo. Simulations including a cloud layer demonstrate decreasing tilt error with increasing cloud optical depth. © 2016 Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75170
Appears in Collections: 影响、适应和脆弱性 气候变化与战略
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作者单位: NILU - Norwegian Institute for Air Research, P.O. Box 100, Kjeller, Norway; Department of Geosciences, University of Oslo, Oslo, Norway; Sierra Nevada Research Institute, University of California, Merced, CA, United States; NIBIO - Norwegian Institute of Bioeconomy Research, P.O. Box 115, Ås, Norway
Recommended Citation:
Bogren W,S,, Burkhart J,et al. Tilt error in cryospheric surface radiation measurements at high latitudes: A model study[J]. Cryosphere,2016-01-01,10(2)