气候变化领域集成服务门户(CCPortal): Tilt error in cryospheric surface radiation measurements at high latitudes: A model study

CCPortal

DOI	10.5194/tc-10-613-2016
	Tilt error in cryospheric surface radiation measurements at high latitudes: A model study
	Bogren W.S.; Burkhart J.F.; Kylling A.
发表日期	2016
ISSN	19940416
卷号	10 期号:2
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).
学科领域	albedo; azimuth; cloud cover; cryosphere; error analysis; irradiance; land surface; latitude; magnitude; optical depth; radiation budget; sensor; zenith angle
语种	英语
scopus关键词	albedo; azimuth; cloud cover; cryosphere; error analysis; irradiance; land surface; latitude; magnitude; optical depth; radiation budget; sensor; zenith angle
来源期刊	Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/119686
作者单位	NILU - Norwegian Institute for Air Research, P.O. Box 100, Kjeller, 2027, 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, 1431, Norway
推荐引用方式 GB/T 7714	Bogren W.S.,Burkhart J.F.,Kylling A.. Tilt error in cryospheric surface radiation measurements at high latitudes: A model study[J],2016,10(2).
APA	Bogren W.S.,Burkhart J.F.,&Kylling A..(2016).Tilt error in cryospheric surface radiation measurements at high latitudes: A model study.Cryosphere,10(2).
MLA	Bogren W.S.,et al."Tilt error in cryospheric surface radiation measurements at high latitudes: A model study".Cryosphere 10.2(2016).