Big algal bloom off southern English coast?

An unusually hot day yesterday and, I think, this was the first time in a long time that we’ve had hot weather on a bank holiday weekend. So lots of people made the trip to the coast.

This photo is from a different year, looking east from Southsea (Portsmouth).

Yesterday evening, a “chemical haze” suddenly rolled in from the sea in southeastern England. People’s eyes and throats were irritated by it and some people are reported to have vomited (but I wonder if that was actually caused by whatever was in the air).

Whatever it is, it is present in Portsmouth as well. During the day, I had noticed that my throat was achy, for no reason that I could identify. In the afternoon/evening, I first smelled something that I quickly recognized as barbecue fumes and later I smelled something else that I couldn’t identify and shrugged off. Maybe someone did something weird with a barbecue.

Then I saw a tweet… After I read about a chlorine-like chemical haze, I wondered if I was merely imagining smelling something. Seems easy enough to do. I later went to the window, saw that the windows were wet on the outside so some cold air (mist) had definitely rolled in, and what I smelled was like the smell of seaweed that I smell when I hang out on the shore.

Anyway, chlorine seemed very unlikely to me and I started thinking ozone build-up. But it seemed too massive for that (and would likely have required a reversal of wind direction during the day).

What I ended up wondering is: Could it have been DMS from a massive algal bloom? (“gas production during the senescence phase is 7–26 times higher than during the growth phase”) And next: Could it have come from E hux? (And, could it be related to global warming, maybe? It’s likely to soon for it to be related to Harvey somehow.)

If that is the case, then surely active marine scientists have already contacted the authorities with their speculations.

As usual, the British authorities were saying little more than to close windows and not to worry.

Also, wouldn’t the substance spike have shown up in one of the automatic air quality monitoring stations?

Likewise, if the haze was due to some kind of industrial event in France, then surely the authorities would have already found that out. (There is a windfarm construction project off Brighton, but it seems very very very unlikely to me that that has anything to do with it, lol.)

Some people must still be very busy studying satellite images of the English Channel right now.

An E hux bloom should show up in those easily enough, but such an observation would then have to be linked to “ground truth”. If it’s some other kind of bloom, it might be more difficult to detect.

If there is a bloom, wouldn’t one of the ferries have noticed something? If not, then a bloom could be further out.

They’re working on it:

I am highly intrigued!

A phytoplankton bloom in the English Channel as seen by SeaWiFS (2002) (The light area near the Thames, that is sediment, however.)


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