Satellite Remote Sensing - Satellite Contributed Ocean Colour - SeaWIFS Chlorophyll Concentration in the Southern Ocean: Weekly, Johnson et al 2013

The Aqua and Orbview satellites carry a MODIS and SeaWIFS sensors (respectively) that observes sunlight reflected from within the ocean surface layer at multiple wavelengths. These multi-spectral measurements are used to infer the concentration of chlorophyll-a (Chl-a), most typically due to phytoplankton, present in the water. There are multiple retrieval algorithms for estimating Chl-a and aggregating the data over time. This data set is a reprocessed copy of 9km monthly and 8-day versions produced globally by NASA, adjusted for the Southern Ocean south of latitude 30S. The full methodology is described in Johnson, R., Strutton, P.G., Wright, S.W., McMinn, A., Meiners, K.M., 2013. Three improved satellite chlorophyll algorithms for the Southern Ocean. Journal of Geophysical Research: Oceans. doi: 10.1002/jgrc.20270. It is expected that the data set will be periodically updated with contemporary data as it becomes available.There are four sub-streams within this data set. A monthly and an 8-day series for MODIS/Aqua and similarly for SeaWIFS. Note that SeaWIFS ceased operation in late 2010 so there will be no further SeaWIFS data. The data represented by this record is weekly data for SeaWIFS.

Aqua卫星与Orbview卫星分别搭载MODIS传感器与SeaWIFS传感器，可在多波长波段下观测海洋表层水体反射的太阳光。上述多光谱观测数据可用于反演水体中叶绿素a（Chl-a）的浓度，该物质绝大多数由浮游植物产生。
当前存在多种用于估算叶绿素a浓度并按时间维度聚合数据的反演算法。
本数据集为NASA全球生成的9公里分辨率月度与8天尺度数据集的重新处理版本，针对南纬30°以南的南大洋区域进行了适配修正。
完整的处理方法详见Johnson R.、Strutton P.G.、Wright S.W.、McMinn A.、Meiners K.M.于2013年发表于《Journal of Geophysical Research: Oceans》（《地球物理研究杂志：海洋》）的论文《Three improved satellite chlorophyll algorithms for the Southern Ocean》（《适用于南大洋的三种改进型卫星叶绿素反演算法》），DOI：10.1002/jgrc.20270。
本数据集将根据后续获取的最新观测数据定期更新。
本数据集包含四个子数据集：分别对应MODIS/Aqua的月度序列、8天尺度序列，以及SeaWIFS的对应序列。
需注意，SeaWIFS传感器已于2010年末停止运行，此后将不再有该传感器的新增观测数据。本记录所代表的数据为SeaWIFS的周度数据集。