“salt ponds”

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Back in 2009 I shot the picture above from a plane flight on approach to SFO. On Flickr (at that link) the photo has had 16,524 views and has been faved 420 times as of now. Here’s the caption:

These are salt evaporation ponds on the shores of San Francisco Bay, filled with slowly evaporating salt water impounded within levees in former tidelands. There are many of these ponds surrounding the South Bay.

A series microscopic life forms of different kinds and colors predominate to in series as the water evaporates. First comes green algae. Next brine shrimp predominate, turning the pond orange. Next, dunaliella salina, a micro-algae containing high amounts of beta-carotene (itself with high commercial value), predominates, turning the water red. Other organisms can also change the hue of each pond. The full range of colors include red, green, orange and yellow, brown and blue. Finally, when the water is evaporated, the white of salt alone remains. This is harvested with machines, and the process repeats.

Given the popularity of that photo and others I’ve shot like it (see here and here), I’ve wanted to make a large print of it to mount and hang somewhere. But there’s a problem: the photo was shot with a 2005-vintage Canon 30D, an 8.2 megapixel SLR with an APS-C (less than full frame) sensor, and an aftermarket zoom lens. It’s also a JPEG shot, which means it shows compression artifacts when you look closely or enlarge it a lot. To illustrate the problem, here’s a close-up of one section of the photo:

See how grainy and full of artifacts that is? Also not especially sharp. So that was an enlargement deal breaker.

Until today, that is, when my friend Marian Crostic, a fine art photographer who often prints large pieces, told me about Topaz LabsGigapixel AI. I’ve tried image enhancing software before with mixed results, but on Marian’s word and an $80 price, I decided to give this one a whack. Here’s the result:

Color me impressed enough to think it’s worth sharing.



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Before the salt in evaporating sea water turns white, it goes through stages of color that range from jade green to brick red, with variations of orange, yellow and other colors. From above the salt ponds around San Francisco Bay look like giant panes of stained glass. The shot above is from my latest set, shot on approach to SFO last week.

Here’s another series.

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These are a few among the many salt ponds that ring the south end of San Francisco Bay. Once considered and agricultural innovation and an economic boom, the practice of “reclaiming” wild wetlands for industrial purposes is now considered ecologically awful by environmentalists, especially here on the West Coast of the U.S., which has precious few wetlands in any case. Many environmentalists have been working to get Cargill to close the ponds and return the Bay to its more natural state. Cargill hasn’t budged. In fact, <a href=”http://www.cargill.com/sf_bay/saltpond_ecosystem.htm”>Cargill has its own views</a> on the matter, plus some interesting facts about the ponds themselves.

It’s worth pointing out that the Bay is actually one of the youngest features on the California landscape, having flooded within only in the last couple thousand years, as sea levels rose. (Global warming has been happening, in fact, since the last ice age.)

I took this shot two days ago on approach to San Francisco on a flight from Boston. Here’s a set of all the photos I’ve taken of salt ponds, both here and in the desert. And here is the whole set of shots I took from coast to coast. Most were at the ends of the flight, since the sky was undercast most of the way.

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