Westberry Toby K, Boss Emmanuel, Lee Zhongping
Department of Botany and Plant Pathology, Oregon State University, Corvallis, Oregon 97331-2902, USA.
Appl Opt. 2013 Aug 1;52(22):5552-61. doi: 10.1364/AO.52.005552.
Raman scattering can be a significant contributor to the emergent radiance spectrum from the surface ocean. Here, we present an analytical approach to directly estimate the Raman contribution to remote sensing reflectance, and evaluate its effects on optical properties estimated from two common semianalytical inversion models. For application of the method to ocean color remote sensing, spectral irradiance products in the ultraviolet from the OMI instrument are merged with MODerate-resolution Imaging Spectroradiometer (MODIS) data in the visible. The resulting global fields of Raman-corrected optical properties show significant differences from standard retrievals, particularly for the particulate backscattering coefficient, b(bp), where average errors in clear ocean waters are ~50%. Given the interest in transforming b(bp) into biogeochemical quantities, Raman scattering must be accounted for in semianalytical inversion schemes.
拉曼散射可能是海洋表层出射辐射光谱的一个重要贡献因素。在此，我们提出一种分析方法，用于直接估算拉曼散射对遥感反射率的贡献，并评估其对从两种常见半分析反演模型估算的光学特性的影响。为将该方法应用于海洋颜色遥感，来自OMI仪器的紫外光谱辐照度产品与中分辨率成像光谱仪（MODIS）的可见光数据进行了合并。由此得到的经拉曼校正的光学特性全球场与标准反演结果存在显著差异，特别是对于颗粒后向散射系数b(bp)，在清澈海水中平均误差约为50%。鉴于将b(bp)转换为生物地球化学量的研究兴趣，在半分析反演方案中必须考虑拉曼散射。
