Seasonal hypoxia/suboxia (at times anoxia) towards the end of Southwest monsoon (SWM; June to September) at the coastal time series site off Goa, West coast of India was found to influence the dynamics of phytoplankton biomass, community structure and production of climatically active gas, dimethylsulphide (DMS). In this diatom dominated study region, high DMS production in the subsurface waters during late SWM might possible be attributed to the stress experienced by micro- and macro-algae from the prevailing low oxygen subsurface waters through different pathways specifically believed to be via methylation pathway (see Schafer et al., 2010). Based on laboratory experiments, we hypothesize presence of floating seaweeds mostly Sargassum species washed from the shore to the study site to contribute sizably to DMS production in the water column as they sink and degrade during the senescence phase. However, we are yet to address its loss/emission processes across the oxic-hypoxic boundary of seasonal (and permanent) oxygen minimum zone of the northern Indian Ocean, which is important from the viewpoint of global climate change.

在印度西海岸果阿附近的沿海时间序列站点，西南季风（SWM；6 月至 9 月）即将结束时，季节性缺氧/缺氧（有时缺氧）被发现会影响浮游植物生物量、群落结构和生产的动态。气候活跃气体二甲硫醚（DMS）。在这个以硅藻为主的研究区域中，SWM 后期地下水中 DMS 的高产量可能归因于微藻和大型藻类通过不同的途径（特别被认为是通过甲基化途径）从普遍存在的低氧地下水中经历的压力。参见 Schafer 等人，2010）。根据实验室实验，我们假设存在漂浮的海藻，主要是从岸边冲到研究地点的马尾藻物种，当它们在衰老阶段下沉和降解时，它们对水体中 DMS 的产生有很大贡献。然而，我们尚未解决北印度洋季节性（和永久）含氧最低区的含氧-缺氧边界的损失/排放过程，从全球气候变化的角度来看，这一点很重要。