To sum up: there is a lot of research showing that Facebook makes people feel like shit. So maybe, one day, people will stop using it.
John Lanchester’s long essay about Facebook in the London Review of Books has been getting shared a lot in my circles; Wired editor in chief Nicholas Thompson called it “the most intense, critical essay on Facebook that I’ve ever read.”
While it covers a lot of familiar ground (tl;dr: “If you’re not paying for it, you’re not the customer, you’re the product”) Lanchester makes a couple of points that have been troubling me. One is the statement above, about Facebook use correlating negatively with happiness.
Lanchester cites a number of studies to support his point:
American Journal of Epidemiology: ‘Association of Facebook Use with Compromised Well-Being: A Longitudinal Study’
Computers in Human Behaviour: ‘Facebook Use, Envy and Depression among College Students: Is Facebooking Depressing?’
Current Opinion in Psychiatry: ‘The Interplay between Facebook Use, Social Comparison, Envy and Depression’
Plos One: ‘Facebook Use Predicts Declines in Subjective Well-Being in Young Adults’
Cyberpsychology, Behavior and Social Networking: ‘The Facebook Experiment: Quitting Facebook Leads to Higher Levels of Well-Being’
But here’s the question: If Facebook makes people unhappy, and the more they use it the unhappier they are, why does usage continue to grow? Not only are more people using it, a higher proportion are checking Facebook at least once a day.
My experience correlates with this: The more I use Facebook, the unhappier I am. And yet I keep returning to it: That’s where my friends are. It’s where organizations I belong to post useful information (about my children’s school, for instance).
Using social media makes me feel more connected, albeit unhappier. In a fragmentary suburban environment, with few opportunities to form and maintain long-term friendships; as a parent, with no time for a social life; as a full-time salaried worker and commuter whose job demands constant attention — with all of these conditions social media is often the only social interaction I get outside my family and work life.
This is why, despite occasionally signing off Facebook and Twitter, despite removing their apps and trying different ways to limit my access, despite trying to be mindful about my use of social media and its effects on my mood, I always come back.
Facebook offers a terrible bargain: It gives you the connectedness you crave, but it’s unfulfilling and leaves you wanting more. It’s like drinking Coke, or eating McDonald’s, except you don’t even have to pay for it. No wonder we guzzle it down, when all the evidence, and even our own eyes and hearts, show us how bad it is for us.
Which brings me to the second point I can’t get away from: Lanchester’s comments about how Facebook is effectively “the biggest surveillance-based enterprise in human history.”
What Facebook does is watch you, and then use what it knows about you and your behaviour to sell ads. I’m not sure there has ever been a more complete disconnect between what a company says it does – ‘connect’, ‘build communities’ – and the commercial reality.
I am looking for a way to use social media like Facebook that doesn’t make me feel like shit.
Amanda Scurti’s comic-essay on Twitter is a relevant read. She takes a hiatus but finds her way back to Twitter based on the creative communities she’s part of there, and the values they provide to her: Empathy, understanding, communication. She concludes that the secret is knowing when to disconnect, and using Twitter responsibly, particularly if you have a large following.
Scurti’s essay is thoughtful and hopeful but has an unsatisfying conclusion. For me, Twitter is somewhat less troubling than Facebook because Twitter is far less effective at surveillance, thanks largely to the ease with which people can create pseudonymous accounts. But I’ve found Twitter is just as mood-affecting as Facebook is, and I can’t say I’ve found the communities there to be particularly conducive to empathy and communication.
In short, I’m still looking for a way to share ideas, and stay connected with people I like, without feeling like shit.
In the meantime, I guess you can still find me on Facebook and Twitter.
“What is the meaning of a solar eclipse? To the ancient Chinese, solar eclipses meant that dragons were devouring the sun. To the Czechoslovakians, they meant that ice giants, bitter enemies of the sun, were conquering it. To the Romans, they meant that the sun was poisoned and dying.
To the Jews, solar eclipses meant that the moon was passing between the sun and the earth, thereby blocking the sun’s light.”
tl;dr: I’m joining ValiMail as head of communications, because I like email and want it to work right.
I’m kind of a fan of email. I’m weird like that: Most of the journalists and tech experts I know say they hate email. But I keep coming back to it.
Email is ubiquitous, and since it’s based on open standards, it’s not controlled by any single company. Unlike the rest of the web we lost, it stands, almost alone, as a bastion of universality, accessibility, and openness. You can set up your own email server if you want, with whatever security or lack of security you deem appropriate, and you don’t have to ask anyone’s permission or pay a fee. You can write lengthy formal missives to your friends and business associates or short notes to yourself or your baby daughter. You can use email as your to-do list. You can treat email like SMS and write tight messages without punctuation or capitalization. It’s all good, and it’s all up to you.
Email was one of the first things that caught my interest when I first really got online in 1991, and when I published a book in 1995, the most useful four pages in it explained how to send email from one online service (like Prodigy) to another (like CompuServe) via the Internet. (It wasn’t obvious at the time.)
Email continues to be an essential tool for communication between people and companies. It is the most effective marketing medium bar none. The spam problem is largely taken care of due to sophisticated and adaptable filtering.
But there’s one big problem remaining, and that’s trustworthiness.
In most cases, it’s far too easy impersonate someone in email by putting their name and email address in the From field of your message. There are no built-in safeguards in email’s basic protocols to validate the sender of an email.
As a result, phishing is rampant. Roughly 90% of cyberattacks start with hackers sending phishing emails to individuals, and those emails often impersonate senders the recipients would trust (like their company’s IT manager or CEO, or their bank, or Google.)
That’s where email authentication comes in. To simplify a bit, once a domain owner has enabled email authentication and has set an enforcement policy, emails from any authorized senders — to any recipient — will get through. But emails from unauthorized senders won’t even get delivered.
It’s complicated to implement, and that’s why most domain owners have not yet enabled authentication, even though the majority of email service providers (like Gmail or Office 365) are compatible with it. And that’s the job that ValiMail handles, by automating the process of setting up, managing, and monitoring email authentication for companies that want to protect their domains.
The headline benefit is that it stops phishing. Close behind that is that it protects a company’s brand reputation from bad guys who would impersonate it. A third benefit includes the ability for IT people to get control over “shadow IT” services: cloud services that random employees have signed up for. Whenever those services attempt to send email on behalf of the company, and most of them will, the IT folks get a notification and can make a decision about whether or not to authorize those emails.
To make a long story short, ValiMail offered me the position of head of communications, and I accepted. My first day is Monday. If you’re a journalist and want the inside scoop on email authentication, or you could use data on phishing and its broader impact on cybersecurity, let me know. I am going to be a zero-BS comms guy, because I’ve been on the other side and I know what is useful PR and what’s not. I’m going to be useful.
If you’re not a journalist and you’re interested in this topic, tune in to the ValiMail blog, where I’ve been writing for over a year and will continue to post what I hope will be interesting and illuminating updates.
I didn’t set out to find a job. I was very happily running my own show at Tweney Media, enjoying life as an independent consultant and freelancer. I’m proud that I was able to deliver some great results for my clients.
But I like the people at ValiMail, I like what the company is doing, I think there’s a big opportunity there, and most of all, I believe they’ve got something real that will have actual, material benefit to the world. I’m not saying that Snap Spectacles or your social network for dogs don’t have social utility, but with ValiMail, I can clearly see a real benefit that I can get behind.
Besides, did I mention that I really like email? And I want it to stay open and free — just more trustworthy.
I have loved the San Francisco waterfront since I first saw it. For years, my commutes have taken me along the Peninsula coastline via Caltrain, and then along the Embarcadero on my bike. I’ve got a folder full of photos of the waterfront. I never tire of looking at the Bay Bridge, alongside it, under it, the fireboats next to it, the Claes Oldenberg sculpture of a bow-and-arrow embedded in the grass nearby. When I go to events at Fort Mason I almost always sneak out and walk to the end of a pier so I can look at the water and wonder what the fishermen are catching. I watch people strolling the Embarcadero as I bike along. The water is ever changing, the weather almost as constantly in flux. Weird and wonderful things come and go, like a massive silver rocket ship that stood on the waterfront for several years, or a congregation of cormorants and pelicans clustering on the water for half an hour in pursuit of a tasty school of fish just under the surface.
On Sunday I got to see that waterfront from a seal’s point of view. At 9:50am I got in the water at the Golden Gate Bridge, and at about 12:05 I got out at McCovey Cove, about 6.5 miles east and south.
I say “I got in the water” and “I got out,” and while it’s true that I did all the swimming by myself, I was also supported by a pilot boat, helmed by Capt. A (who wishes to remain anonymous), encouraged by my wife Karen, and protected by a flotilla of volunteers in Zodiacs and kayaks. Baykeeper organized the swim, and it’s thanks to them and all the volunteers who pitched in that I was even able to attempt this swim. Also, there were about 4 other solo swimmers and a dozen or so relay teams doing the swim at the same time.
My, or our, swim on Sunday took me along a huge part of San Francisco’s Bay frontage, and it made me realize again how varied and beautiful it is. I tend to be a bit of a tourist when I swim: I’m not that fast to begin with, and I frequently stop to look around when I see an interesting sight, or a bird, or a change in the pattern of waves in the water. It’s because of this that I say my most critical piece of swimming equipment is my goggles. Vision-correcting goggles have been life changers for me: I doubt I would be interested in or comfortable doing open-water swimming if all I could see at a distance were the blurry shapes my naked eyes render to my brain, but with the goggles everything is, apart from drops of water or occasional problems with fogging, crystal clear even at a distance.
The fundamental rhythm of being a swimming sightseer is slow, rhythmic, repetitive: A scene glimpsed to the left, then the green of the water below as you breath out; a scene glimpsed to the right, then the green of the water again. These scenes, left and right—assuming you’re a bilateral breather—change slowly. You get important, reassuring information that you’re actually making progress by noticing how the relative positions of distant and more-distant objects change in parallax. The view in front of you, as you lift your head to sight forward, tends to change even more slowly, and you glimpse it even less often, making it a more fragmentary, tactical series of views. But the views to the side stitch themselves into a long panorama, the long scroll of the shoreline unfurling in slow motion alongside you.
Just before the swim began we spotted humpback whales to our north, breaching near the north tower of the Golden Gate Bridge. I was excited about this because I feel a special bond with humpbacks: I enjoy their playful and peaceful personalities and I see them as a triumph of the environmental movement. Once near extinction, the “save the whales” movement, though easy to mock, was incredibly successful and has protected the humpbacks long enough that their populations, in most parts of the world where they are found, have rebounded remarkably. These whales continued their display as I started my swim, and though I didn’t see them from the water Karen captured one photo where you can see a whale in the background and me in the foreground.
For the first hour or so my concern was to make a good start and cover some distance, so I swam hard. Fort Point, the Presidio, and Chrissy Field to my right, with their furry, green hills, slowly gave way to the area around the Palace of Fine Arts, its golden dome shining brightly under the overcast sky. That dome was my companion for a long time, it seemed, as the Marin headlands to my left fell away and I aimed for Alcatraz in front of me.
At some point Capt. A moved the boat from my right rear quarter over to my left side. Its large bulk obscured the view to the left for a long time, but in return I got to see the encouraging sight of Karen and Capt. A watching me, cheering me on, and taking photos.
And then, a bit less than an hour along, we were abreast of Fort Mason’s bright cream-colored buildings and then Aquatic Park, less visible than I’d thought it would be from the distance we were, but with the Ghirardelli sign showing clearly out above it. Capt. A threw my Odwalla bottle to me, tied to a long string, and as I took a few sips I noticed Alcatraz peeking out on the other side of the boat, alongside me and enormous instead of ahead of me and smallish. At that point I knew I’d made good progress and I started enjoying the swim more.
For the next hour we went along the waterfront I know well: the Jeremiah O’Brien’s battleship-grey bulk, Fisherman’s Wharf and Pier 39, the Embarcadero’s many piers leading up to the broad low profile of the Ferry Building with its clock tower standing up in the middle. Behind the clock tower were the rising hills of skyscrapers downtown, bracketed by the old 1970s Transamerica Pyramid on the right, and the new, rounded, not-yet-complete blunt pickle shape of the Salesforce Tower on the left.
Eventually we were alongside Cupid’s Span, clearly visible in front of the brick buildings of the old working waterfront, former warehouses exemplified by the Hills Bros. coffee building, its long-obsolete sign still standing as a reminder of the city’s long-gone working-class past. The sun was coming out and the quality of the light and the water changed dramatically as I approached the Bay Bridge. Instead of cold grey-green water I was now swimming in a warm bright yellowish-green, and the sunlight glinted on the surface of the waves and cast shadows underneath the Bay Bridge. I swam directly under the bridge, paused to whoop and holler and float on my back for a moment, gazing up at its underside: I knew I had come a long way, in less than two hours, and the hardest part was done. And there I was, looking up at the bridge I had spent years admiring and looking up at, only this time I was in the water and I had swum to it, all the way from that other bridge, the Golden Gate, which I’d been looking up at just a couple hours before.
After passing the Bay Bridge the water was getting noticeably warmer, but also it seemed I wasn’t making nearly as much progress—the current had slackened a bit. Also, perhaps, in my mind I was assuming I was close to the end, but I had underestimated the remaining distance. As I swam along the grey warehouses and parking piers of the SoMa waterfront I kept wondering: How much further to AT&T Park? Why aren’t I there yet? Where is it?
After twenty minutes or so, though, the long, low breakwater that shelters the marina adjacent to the ballpark came into view. It was about this time that I encountered the Bay Parade proper, a fleet of colorful kayakers and paddle boarders coming the other way. I swam through a group of them, and they shouted encouragement to me as they went by in the opposite direction.
I asked Capt. A where I was supposed to be swimming, and he pointed out two red buoys on the water. I could barely see them but there was a speck of red, so I aimed for that. It took a frustratingly long time, it seemed, in water that was growing warmer and more resistant to progress, before the red speck resolved and became clearly visible as a pyramidal buoy. In fact the current was still pushing me along a little bit, I’m sure, only less than before. I was so used to the feeling of rocketing along on a major flood by that time that having to provide most of my own forward momentum felt like resistance—like normal swimming.
At any rate, I eventually came within shouting distance of the buoy on the right, and I swam hard until I was sure that I had cleared the imaginary line between it and the buoy on the left. I was done! As Capt A’s boat pulled up alongside me, I could see Karen on the deck shouting and me and taking pictures. I whooped, raised both fists in the air, and my head immediately submerged under water. I tried again, kicking a bit harder this time: The victory pose is a little tricky in the water.
I climbed aboard the boat and stood soaking up the sun and the accomplishment for half an hour, and then the Bay Parade returned and it was time for the finale alongside AT&T Park. I put on my unicorn-horn swim cap and jumped back into the water, this time as a magical narwhal, for an easy swim back and forth with a group of other swimmers. We were all happy, paddling slowly, a little confused from the effects of cold water, but enjoying the moment. Aboard the Baykeeper sailboat Freda the band SeaForager’s Fishwives was playing a squeezebox and singing sea chanties; I joined in for a few lines of “Blow the Man Down.” And then we swam into the harbor and exited the water.
Someone was taking video of the parade and showed it on the Jumbotron inside the ballpark, where the Giants vs. Marlins game was just about to start. As for me, I was enjoying a warm shower in a portable shower truck provided by Baykeeper, and then I went and celebrated with the other swimmers and parade participants in a party on the other side of McCovey Cove.
I was not the fastest swimmer, by far. The winning swimmer completed the swim in 1:35, while it took me 2:15 or 2:20. But I don’t care. Five years ago I could barely swim 100 yards without having to stop and catch my breath. Sunday I covered the distance almost nonstop, with a lot of help and encouragement and support from Capt. A and Karen, and from the many supporting pilots and kayakers on the water from the Dolphin Club and the South End Rowing Club. I got to see the waterfront I love so much, from a reverse angle, and I gained a new appreciation for its variety and the way it all fits together.
And, I am happy to say, my supporters completely blew me away. You guys collectively donated almost $2,400 to Baykeeper, helping to fund the organization’s important mission of researching and defending the health of the Bay. I know Baykeeper is grateful. And I am so appreciative. I felt your support the entire length of the swim.
If you’re into this sort of thing, you might enjoy this album of photos Karen took during the swim:
Pelicans stood on the breakwater, gravely watching us as we swam by. I’ve come to think of the shorebirds as different kinds of people, a sort of audience for my swims: The cormorant people, the gull people. It’s clear they’re looking at us as much as we are looking at them. And indeed, I noticed at least one of the pelicans swiveled his or her head, slow and smooth, to follow me as I went by. Nothing escaped that one.
The pelicans have a rather different look when they are staring at you. They seem grave, and unperturbed, and much more dignified than they appear when they’re splashing into the water or tipping their heads back to choke down a fish caught in that absurd pouch of theirs. The fact that they can stare at you with both eyes reminds you that they are predators.
I swam in the Bay for three hours and five minutes on Saturday, for a total distance of about 4.6 miles. Two hours of that was with Zina, who has been with me on several training swims so far, and whose adventurousness and good nature make these mini-journeys a lot easier.
That’s the longest I’ve been in the cold water so far, and the furthest distance I’ve ever swum in any kind of water. It’s probably more time than I’ll use on my big swim July 9, too, because even though that swim is a greater distance by about two miles, I’ll have the advantage of a flood current pushing me along. After last weekend’s training swim, several people told me I was over-preparing. That’s a good place to be. I feel confident and strong.
We crossed back and forth between the end of the breakwater that protects Fisherman’s Wharf and the far end of Fort Mason, at the edge of Gas House Cove. Two full circuits of that (Chas Laps in the lingo of the South End) took us about two hours, and then I circled around the cove twice. It felt like a kind of breakthrough.
Another breakthrough with this swim is an absurdly ordinary one. I realized a couple hours into the swim that I was getting very uncomfortable because I really had to pee—all the water and liquid food I was taking in was catching up to me. “Just go,” Zina said. “That’s your prerogative as an open-water swimmer.” And yet it’s not so easy: A lifetime of self control leads one to feel substantially repressed about pissing one’s pants, even if those pants are already completely immersed in liquid. Maybe there is also something about the water that physically inhibits this function, at least for me—though to judge from studies of swimming pool chemistry, many people don’t have the same problem I do. At any rate, I had never succeeded at this neglected skill, and I realized that it might limit my ability to stay in the water and complete a long swim, since the discomfort was great enough to make me really doubt my willingness to continue.
So after Zina paddled in to the beach, I just hung out for a bit by the opening of the cove, looking out at Alcatraz, treading water and trying to relax. Eventually, you’ll be happy to hear, I was able to pee in the water. I did another hour in the water much more comfortably after that.
Just as I was realizing this small personal breakthrough, though, another swimmer hailed me from a a few dozen feet away. “Hey Dylan! Great day, isn’t it!” She, too, was on a long training swim and had been in the water as long as I had. We chatted traded notes on what kind of feeds we were taking, and then we continued on our swims.
Finally, this week there came a third breakthrough that I have nothing to do with: My supporters have contributed over $2,000 to Baykeeper, exceeding the fundraising goal I set when I committed to do this swim. Baykeeper does terrific work as a data collector, analyst, and legal advocate for the health of SF Bay as a natural, recreational, and economic resource for everyone. Its Bay Parade on Sunday will be a colorful, costumed, on-the-water celebration of all that the SF Bay represents to the people who live around it. And it will be the culmination of my swim training and fundraising. There’s still time to contribute your support, and if you do, I will be incredibly grateful—and Baykeeper will as well.
Last weekend I entered the water much better prepared than the week before, and managed to swim for two and a half hours. The water temperature varied from 59F-60F, and the morning was fairly calm, overcast giving way to sunny sky. The biggest challenge was the current: We found a significant flood challenging our attempts to swim westward out of the cove, so we gave in and rode the current back east, along the outside of the breakwater, and then came back inside. But even with the shelter from the breakwater, and later inside the cove, the flood was still strong enough that it wreaked havoc with any notion of speed or time. I had to fight my way out to the opening of the cove, but later I had to fight my way in the opposite direction, from the opening back along the ships. Behind the ships the water was sucking me up against the hulls, to the right, but as soon as I emerged from behind a ship the full force of the flood knocked me hard to the left, and I had to swim diagonally to make any headway at all. In all I think I covered about 3.5 miles, which is not much for the time, but plenty given the currents. I felt very good about the swim—it was confidence-boosting.
In my last post I wrote about how changeable the water is, and this weekend was no exception to the rule. But there was one factor I didn’t mention, and that’s human influence.
Humans have been changing water flows in the Bay for a century: Dredging shipping channels, putting in bridge piers that create vortices and outright whirlpools during strong floods and ebbs, filling in parts of the bay and eliminating many of the marshy margins that used to absorb the excess rains or river flows and act as a buffer to the incoming tides. Compared to many estuaries, the SF Bay is still remarkably functional as an ecosystem; it hasn’t been paved or channelized or contained too drastically. There are notable victories: The environmental movement got its start in the 1960s and 1970s here, spearheaded in large part by Berkeley wives, and the organization those women founded, Save the Bay, helped bring about a massive reduction of pollution and trash in the Bay and a huge increase in the amount of publicly-accessible shoreline around the Bay. Peninsula environmentalists helped create a 20,000-acre wildlife refuge in the 1980s. Former salt-drying ponds operated by Cargill are being converted back into marshland, bringing back endangered species.
But there’s one way humans exert massive control over the entire Bay ecosystem, and that’s through the rivers that flow into it. Nearly every river going into the Bay has been dammed at some point upstream, giving the State of California a huge amount of control over how much water makes it down to SF. Much of this water is already diverted to agricultural uses in the Central Valley, or to reservoirs in the East Bay that store water for drinking, for flushing toilets, and for watering lawns. Now, a new proposal championed by the Governor would divert even more water, through underground tunnels, to Southern California.
Called WaterFix, the $17-billion-dollar project’s most prominent feature is the creation of the Delta Tunnels, a pair of long underground tunnels, 30-40 feet in diameter and up to 150 feet underground, that will suck water out of the Sacramento River between Courtland and Clarksburg, and take it 35 miles south, under the entire Delta, to deposit that water in the Clifton Court Forebay, a part of the California Water system that lies between Walnut Creek and Tracy. The water would then flow south through the California aqueduct system, through the Central Valley and potentially as far south as Los Angeles.
The U.S. Fish & Wildlife Service and the National Marine Fisheries Service recently reviewed the plan and gave it a green light, particularly after the inclusion of some habitat restoration in the project. Also, it may be that WaterFix will be better for fish than the current Delta water-capture system, which draws water out of the southern Delta only, sucking up so much water that rivers flow backwards and fish die en masse. The new system will avoid these reverse flows and kill fewer fish, planners say.
But SF Baykeeper has also reviewed the plan and has found a lot of reasons to be concerned. The one that sticks out, to me, is the fact that the Delta is not in good shape to begin with. Algal blooms, the near-extinction of the Delta smelt and the decline of many other native species, and the fact that fresh-water inflows into the Bay have been very low through the drought years are causes for concern. The salmon-fishing season has seen a lot of trouble for the past several years due to low numbers of mature salmon, for instance. Crab seasons in the SF area have also been sharply curtailed or cut off completely in recent years as well.
In that context, sucking even more water out of the rivers that feed the Bay doesn’t seem like a step in the right direction. As Baykeeper’s brief puts it, “The consequences of removing flows from the Sacramento River include ecosystem-scale effects.” (emphasis mine) Even with the habitat restoration and the steps to prevent fish kills, less fresh water in the Bay could lead to long-term changes throughout the entire Bay system: More species declines, increased salinity, more stagnant water, less oxygen-generating phytoplankton.
One of the reasons I am swimming 6.5 miles in Baykeeper’s Bay Parade on July 9 is because I value exactly this kind of work: Careful, systematic, scientific analysis of the ecological consequences of human actions on the SF Bay. The Baykeeper paper is a thoughtful, balanced study — and it recognizes that, while the Bay and Delta ecosystem need help, there’s no easy fix. It also acknowledges the need for Southern California water users to have access to water, and that it’s impossible to return the Delta to some kind of pristine, pre-human-development condition. Instead, Baykeeper proposes a range of specific alternatives to WaterFix: better watershed management, habitat restoration projects, modernization of the delta levee system, better groundwater storage, more conservation, and perhaps a smaller, single-tunnel project instead of the current double tunnel proposal.
Yesterday I swam around Aquatic Park on a sunny, windy afternoon with shreds of fog whipping themselves away from the Golden Gate and across the blue sky.
The wind on the cove gave different textures to water in every part of the cove: Just off the dock and along the buoy line I was swimming into the chop, punching through each wave and gliding just beneath the jade-green roughness of the surface. Alongside the pier, sheltered from the wind, the water took on a darker, smoother quality, with long, easy hills swelling up and down. Beside the opening of the cove, waves rose up to a foot or more in height, and I looked out at the whitecaps in the open bay and decided I didn’t need to be there at all. I swam back through the lively little waves pushed up against the breakwater and what we call the Jacuzzi, a round cement structure at the end of the breakwater, but felt a bit like I was in a foamy, bubbly jacuzzi myself. Around the other side of the breakwater, in its lee, the water was glassy calm, flat, and pale green. Then I swam back out, alongside the sailing ships and encountered bouncy, playful, tumbly waves the color of an overcast sky, which rolled and rocked me back into the dock, laughing and grinning.
Water in the San Francisco Bay is highly changeable, even within the half-mile circle of Aquatic Park, which after all is just a tiny sample jar pulling a bit of water out of an enormous ecosystem. Sometimes the water is murky and brown, sometimes translucently green, sometimes (rarely) completely clear. It can be as salty as the aftertaste of an over-salted salt bagel, or as mild as lake water on the lips.
The Bay is, in a phrase that John McPhee rightly calls haunting, a “drowned river mouth.” Legends of the people who lived here first suggest that the Bay may not have existed at all as recently as a thousand years ago, or maybe a few hundred—the first Spanish explorers apparently sailed right past it without noticing it, which is surprising for explorers in search of good harbors but perhaps not entirely impossible. The underwater topography of the Bay still preserves what was there before: a river canyon, flowing to the sea around a large hill and then between two even higher hills, the sentinels on either side of what we call the Gate. But at some point it sank, or the sea rose, and though the rivers still flow into it their water now mixes early with the inflowing sea tides, swirling around the northern and southern lobes of the bay and creating thousands of microclimates in and around the water.
The water is green because it’s rich with phytoplankton, the tiny algae that convert sunlight and CO2 into oxygen and serve as the foundation of a whole web of life. It’s opaque brown or translucent green-brown because of suspended sediments of silt, brought down from the Sierras along with the snowmelt. Its fish have elevated levels of mercury because mercury was used, 150 years ago, in gold-mining operations in the foothills hundreds of miles away, and the excess mercury ran down into the Bay and sat there for a century, only now starting to diminish in its effects as the silt covers it up. Because of the mercury you shouldn’t eat certain fish more than once a month, although some of the fishermen along the pier, who are fishing for their dinners, for their families, probably eat more than that. It’s saline because of the ocean and fresh because of the rivers. It’s cold, and the more ocean water pours in the mouth of the Gate the colder it gets, but in the southern and northern, shallower parts of the Bay, the water warms up to bathlike temperatures.
And its currents are maddeningly complex. Tides alone have their own rhythmic predictability, so as mysterious as they may seem while you’re standing on the beach, they’re orderly and rational enough that a simple algorithm in an app can calculate the high and low tides at any time of day anyplace in the world. But the inward flood of water leading to the high tide, and the outward ebb on the way to low tide, are truly hard to grasp. Fluid dynamics at large scales are not easy to understand intuitively, the rivers add another complication, and the involuted, lobed shape of the Bay makes everything cockeyed.
Everyone who swims at Aquatic Park has their own rule of thumb for guessing the currents. Some who have guessed badly, or are not prepared for the currents, have been trapped, terrifyingly, against the pier, pinned down by a current they couldn’t fight. My principle is to listen to people, watch the water, and make my own decisions. I pay close attention to what the water’s doing, how it feels, how it tastes, whether there’s a seam between a patch of ruffled water and a patch of smooth. I watch the shoreline to see how I’m drifting, and time myself between landmarks I know to see if the current is speeding me up or slowing me down. I don’t go outside the cove alone. But those are my rules, and I only know a little about the Bay. I’ve only been swimming here a few years. I still have much to learn.