What's up with the sargassum in Punta Cana?

Hi guys.

So.. Honestly I made this post because I was curious, and in case you guys want to check out what I learned, thanks for reading!

One thing that really surprised me during my trip to Punta Cana was ruined by the amount of sargassum on the beach.

blurry photo.. but the black stuff @ the shorline is sargassum

If you've never heard of it before, sargassum is basically a type of floating seaweed that drifts around the Atlantic Ocean. Sounds pretty harmless, right?

Better photo from https://www.uncommoncaribbean.com/caribbean/sargassum/

Well, when huge amounts of it wash up on shore and start decomposing under the hot sun, it creates a very strong sulfur smell. And by sulfur smell, I mean it smells like someone left a giant pile of rotten eggs on the beach.

At first, I honestly thought something was wrong. The beaches were absolutely gorgeous with their pale white sand and bright blue water, but there was this constant smell lingering in the air. Eventually, I learned that it was coming from the sargassum that had washed ashore.

Apparently, Punta Cana gets a lot of it because it's located on the eastern side of the Dominican Republic, which means it's one of the first places in the Caribbean that these massive floating seaweed mats encounter after crossing the Atlantic Ocean.

I think this diagram does a better job than my explanation https://academicjournals.org/journal/JOMS/article-full-text-pdf/5E6723C62067

What's even crazier is that the seaweed doesn't actually start in Punta Cana. Large amounts of it grow out in the Atlantic and are carried by ocean currents and winds toward the Caribbean. Once it arrives, beaches like Punta Cana end up catching a lot of it.

As I started looking into it more, I found out that scientists think the increase in sargassum over the last decade is linked to a combination of factors, including warmer ocean temperatures, changing weather patterns, and nutrient pollution from things like fertilizer runoff. So while climate change isn't the only reason there's so much sargassum, it may be helping create the conditions that allow these massive blooms to grow.

You can see the increase: https://www.caribbeanreeflife.com/blog/record-breaking-amounts-of-sargassum-in-the-caribbean-what-is-it-and-where-is-it-coming-from

Even though the seaweed wasn't exactly the most pleasant thing to look at (or smell), I still found it pretty interesting. It was one of those moments where I was reminded that even places that look like a perfect postcard have environmental challenges happening behind the scenes.

Plus, after a day or two, I honestly stopped noticing the smell as much.

Though I think my mom would disagree with that statement.

Anyways, thanks for reading my tangent!