Assessment of AERONET-OC LWN uncertainties
Assessment of AERONET-OC LWN uncertainties
复制标题
AERONET-OC LWN 不确定性评估
DOI：
10.1088/0026-1394/51/1/40
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发表时间：
2014
期刊：
影响因子：
2.4
通讯作者：
G. Zibordi
中科院分区：
文献类型：
--
作者：
M. Gergely;G. Zibordi
本研究提出了一个详细的分析的不确定性影响归一化离水辐射（LWN）从水面上的测量范围内的海洋颜色的气溶胶机器人网络（AERONET-OC）的组成部分。该分析，在协议进行的“指南的测量不确定性的表达”（GUM），表明LWN的不确定性显着依赖于海水的光学特性的AERONET-OC网站位于不同的海洋区域。亚得里亚海现场，其特点是各种各样的测量条件下获得的结果，证实了以前的不确定性从一项独立的研究表明相对综合不确定性的中位数值为5%的蓝绿色部分的光谱和约7%的红色。进一步的研究表明，当AERONET-OC LWN的确定限制在低太阳天顶角和低气溶胶光学厚度下进行测量时，前者的不确定性可以降低0.1%。
This study presents a detailed analysis of the uncertainties affecting the normalized water-leaving radiance (LWN) from above-water measurements performed within the context of the Ocean Colour component of the Aerosol Robotic Network (AERONET-OC). The analysis, conducted in agreement with the ‘Guide to the Expression of Uncertainty in Measurement’ (GUM), indicates uncertainties of LWN markedly dependent on the optical properties of seawater for a number of AERONET-OC sites located in different marine regions. Results obtained for the Adriatic Sea site, characterized by a large variety of measurement conditions, confirm previous uncertainties from an independent study indicating median values of relative combined uncertainties of 5% in the blue–green part of the spectrum and of approximately 7% in the red. Additional investigations show that the former uncertainties can be reduced by ∼1% when restricting the determination of AERONET-OC LWN to measurements performed at low sun zenith angle and low aerosol optical thickness.