A Dataset of Ocean Color Products in High-Latitude Oceans of the Northern Hemisphere from 2003-2020

in high-latitude oceans, extreme weather conditions and complex environments make it difficult to obtain large-scale ocean color data through in situ measurements, such as buoy and shipboard measurements, especially during the winter season. ocean color satellites provide the only means of monitoring marine ecological environments at regional and global scales. however, due to the reduced accuracy of atmospheric correction models under large solar zenith angles, publicly-available datasets currently lack ocean color data for the high-latitude oceans during the winter season. in this study, we developed a dataset of ocean color products for the high-latitude oceans of the northern hemisphere (≥50°n) from 2003 to 2020 based on a newly-developed atmospheric correction model. we validated the accuracy of the retrieved chlorophyll concentration products using in situ datasets from the nasa bio-optical marine algorithm dataset (nomad). the results indicated that our dataset had more reliable and accurate records compared to the products distributed by nasa. for instance, this study has established a dataset that, for the first time, covers a long time series (2003-2020) of ocean color products during the winter season in the high-latitude oceans of the northern hemisphere, which should be helpful for the study of the marine ecological environments of the arctic and sub-arctic oceans.

在高纬度海洋区域，极端气候条件与复杂环境使得通过原位测量手段，如浮标和船载测量，获取大规模海洋颜色数据变得尤为困难，尤其是在冬季。海洋颜色卫星是唯一能够对区域及全球尺度上的海洋生态环境进行监测的手段。然而，鉴于大气校正模型在较大太阳天顶角下的精度降低，目前公开可用的数据集中缺乏高纬度海洋在冬季的海洋颜色数据。在本研究中，我们基于一种新开发的校正模型，构建了覆盖北半球高纬度海洋（≥50°N）2003年至2020年的海洋颜色产品数据集。我们利用NASA生物光学海洋算法数据集（NOMAD）中的原位数据集对所获取的叶绿素浓度产品进行了准确性验证。研究结果指出，相较于NASA发布的产品，我们的数据集具有更为可靠和精确的记录。例如，本研究首次建立了一个覆盖北半球高纬度海洋冬季（2003-2020年）长期序列的海洋颜色产品数据集，这将有助于北极和亚北极海洋海洋生态环境的研究。