Satellite Remote Sensing - Satellite Contributed Ocean Colour - MODIS - Aqua 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 MODIS/Aqua.

Aqua和Orbview卫星分别搭载MODIS和SeaWIFS传感器，观测从海洋表层反射的多波长阳光。这些多光谱测量数据用于推断水体中叶绿素a（Chl-a）的浓度，其主要来源通常是浮游植物。

存在多种用于估算Chl-a并随时间聚合数据的反演算法。本数据集是NASA生成的全球9公里分辨率月度和8天版本的再处理版本，针对南纬30度以南的南大洋进行了调整。完整方法学详见Johnson, R., Strutton, P.G., Wright, S.W., McMinn, A., 2013. Three improved satellite chlorophyll algorithms for the Southern Ocean. Journal of Geophysical Research: Oceans. doi: 10.1002/jgrc.20270。预计本数据集将在新数据可用时定期用最新数据更新。

本数据集包含四个子数据流：MODIS/Aqua的月度和8天序列，以及SeaWIFS的同类序列。请注意，SeaWIFS已于2010年末停止运行，因此不再有后续的SeaWIFS数据。

本记录所代表的数据是MODIS/Aqua的周度数据。