SRS 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与SeaWIFS传感器，可在多波长波段下观测海洋表层反射的太阳光。上述多光谱测量数据可用于反演水体中（主要由浮游植物产生的）叶绿素a（Chl-a）浓度。
目前已开发出多种反演算法用于估算叶绿素a浓度，并支持按时间维度聚合数据。本数据集为NASA全球生产的9km分辨率月均与8天合成数据的重处理版本，已针对南纬30°以南的南大洋完成校正。完整处理方法详见Johnson R、Strutton P G、Wright S W、McMinn A、Meiners K M于2013年发表在《地球物理研究杂志：海洋学》（Journal of Geophysical Research: Oceans）的论文《南大洋改进型卫星叶绿素反演算法三则》，DOI：10.1002/jgrc.20270。预计本数据集将随新获取的同期数据定期更新。
本数据集包含四个子数据流：分别对应MODIS/Aqua的月均序列与8天合成序列，以及SeaWIFS的对应序列。需注意，SeaWIFS已于2010年末停止运行，此后将不再有新的SeaWIFS数据产出。
本记录所代表的数据为SeaWIFS的周度数据。