The claim: Photo shows where two oceans meet but do not touch in the Gulf of Alaska
A viral image posted to social media in 2016 that has recently resurfaced purports to show the meeting point of two oceans in the Gulf of Alaska.
The Facebook post, shared on Jan. 10, 2016, with more than 4,300 shares, features a photo of a light blue ocean next to a darker one.
A text above the photo reads: "This is the Gulf of Alaska where 2 oceans meet but do not mix. Tell me there is No God and I'll ask you 'Who commanded the mighty waves and told them they could go no further than this' ! What an absolutely AMAZING God....."
Some users on Facebook have shared other versions of the claim in the form of a video that similarly purports to show a phenomenon where the Atlantic and Pacific oceans meet.
One user who shared the video on Feb. 15 claimed it was taken on cruise ship at the tip of South America.
"Why do these waters not mix? Because there is a huge difference in salinity between the clear water that comes from melting glaciers, which is cool and low in salt, while the water from the second ocean has a high salt concentration," the user captioned the Feb. 15 video. "Therefore, the two oceans have different densities, which makes them almost impossible to mix."
USA TODAY reached out to users who shared the image and video for comment.
Where did the image and video originate?
The image of the dark and light blue ocean is authentic and was captured by Kent Smith, who shared the photo to Flickr on July 4, 2010, and tagged Alaska as the photo's location.
"I thought this was the most unusual thing I saw on the Alaskan cruise in the water," Smith captioned his photo. "These two bodies of water were merging in the middle of the Alaskan gulf and there was a foam developing only at their junction."
He adds that he is "pretty confident" that the image depicts the result of the melting glaciers being composed of fresh water, and the ocean has a higher percentage of salt, causing the two bodies of water to have different densities. He has posted similar photos of the phenomenon to confirm that they are not photoshopped.
The video included in the posts that shows a similar phenomenon of seemingly merging oceans was captured by Steve Pearson in the Strait of Georgia near Vancouver, Canada, on July 4, 2015, according to AFP.
"The river water (Fraser River) flows into the ocean water (Strait of Georgia): a short video clip shot from the BC Ferries boat from Nanaimo, Vancouver Island (Duke Point) to Vancouver (Tsawwassen)," reads the video's caption.
Photos don't show two oceans that don't touch
As Smith noted in his caption, the image shows what happens when fresh water from glaciers melts close to saltwater from the ocean, and why it's difficult for the two bodies of water to mix because of the different densities.
Large eddies, known as moving currents, in the Gulf of Alaska carry glacial sediment and heavy clay from different rivers throughout Alaska, and those materials are lifted up and carried out into the gulf, according to Only In Your State.
It is false to claim that the two bodies of water never touch. They eventually do mix, and they appear as separate only where there are strong gradients coming out against the saltwater.
The video included in the posts shows a similar situation that takes place near Vancouver.
According to a 2013 study by Ocean Networks Canada, the Fraser River reached the ocean near Vancouver, and the fresh water it carries mixes with the ocean water to "form a thin plume of buoyant brackish water."
"In the early summer when the Fraser River carries high sediment loads, the plume is easy to distinguish from ocean water by its distinct light brown colour," the authors of the study wrote. "It can be highly reflective and opaque to sunlight, and because it is a mixture of river and ocean water, it can be quite 'fresh.'"
Our rating: False
Images and videos claiming to show where two oceans meet but don't mare FALSE, based on our research. While the images and videos are authentic, the phenomenon is the result of fresh water from a glacier or river mixing with saltwater from the ocean. The two bodies of water appear separate because of different densities.
Our fact-check sources:
Flickr, July 4, 2010, Merging Oceans
Yahoo! News, Nov. 4, 2011, Snapshots of the week
Anchorage Daily News, April 5, 2017, Mythbusting 'the place where two oceans meet' in the Gulf of Alaska
Flickr, July 4, 2010, Merging Oceans-The Other Images
YouTube, July 4, 2015, When the River Meets the Ocean (Fraser River water flows into the Strait of Georgia)
AFP Canada, Sept. 24, 2020, Photos and videos shared with false claims about oceans meeting in Gulf of Alaska
Only In Your State, Sept. 23, 2016, This Strange Phenomenon Happening In The Gulf Of Alaska Needs To Be Seen To Be Believed
Ocean Networks Canada, Aug. 6, 2013, Fraser River Plume
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This article originally appeared on USA TODAY: Fact check: Image does not show two oceans meeting that don't touch