Despite deaths, here's why scientists still call cave diving 'critical'

The death of two experienced cave divers highlights the perils faced by explorers. However, it's also a uniquely valuable way for scientists to study underwater systems.

Paul Nicklen/National Geographic via AP
In this June 2013 photo provided by National Geographic, diver Susan Bird, working at the bottom of Hoyo Negro, a large dome-shaped underwater cave in Mexico's Yucatan Peninsula, brushes a human skull found at the site while her team members take detailed photographs.

Two cave divers died over the weekend while exploring the Florida underwater system known as Eagle’s Nest, located about an hour north of Tampa, stunning their families and prompting calls for the closure of a notoriously perilous system. 

Chris Rittenmeyer, a Dallas-born digital technology specialist for the Boston Consulting Group, and his friend Patrick Peacock, an adjunct professor of history and philosophy at the Art Institute of Fort Lauderdale and operator of a non-profit dive group, were found at about 260 feet down, in a particularly labyrinthine section of the system, according to the Sun Sentinel. Exactly what went wrong during the dive is unclear, but family described them as experienced divers.

“I guarantee you there was nothing left for them to do in the end,” said Ron Rittenmeyer, the father of Chris, in an interview with CBS

“My son typically dove what he thought was his limit. I believe in his heart he did this dive fully expecting that he would be back,” he said.

The tragedy seems to highlight how dangerous cave systems can be for even the most experienced of divers, and perhaps in particular for explorers seeking to test the limits of where they can go. Ten people have died at Eagle’s Nest since 1981, and the site was closed off for four years before divers successfully got it reopened in 2003, according to CBS.

“It’s the cave explorers that can get into more trouble because they’re doing more dangerous dives,” Jim Garey, a professor at the University of South Florida who studies the biodiversity, hydrology and geochemistry of cave and aquifer systems, tells The Christian Science Monitor. “It’s far more dangerous than what I do. My goal isn’t to go as far or deep into the cave as I can, it’s to study what’s going on in the cave.”

Divers first began plumbing underwater cave systems in the mid-1960s, with the advent of scuba apparatuses. And despite the high costs and the risk involved, for scientists, diving is an irreplaceable way to know more about the systems and tap secrets of broader import, as when geologists draw inferences about sea levels from cave rock formations.

When drilling to collect samples, Dr. Garey tells the Monitor, researchers don’t know if they’re collecting water from a single source or several different ones, since a single aquifer can have different layers of water. “When you’re thinking about a spring from the surface, you’re looking at things flowing out of it, but it’s a complicated story underground.”

As the Monitor noted in a 1982 article on cave divers in Florida, much of the area north of Tampa and west of the state’s central ridge is streaked with tunnels formed in limestone deposits.

Layers of limestone, which is largely compressed coral, were created each time the sea level rose to wash over the land. Those layers make up Florida's aquifer, the freshwater-laden rock that supplies most of the state's drinking water.

As the sea level receded, the limestone was exposed to rainwater, which is slightly acidic from carbon dioxide and soil acids. The acidity dissolved the limestone along its cracks and fissures, which created sinkholes dropping scores of feet, tunnels hundreds of feet long, and caverns as large as a football stadium.

The caverns became interconnected by the tunnels to form underground rivers that eventually pop out as springs. Some of those springs are along the marshland that borders the Gulf of Mexico, and the fresh water pouring out of them has become an integral part of the coastline ecology.

Tom Iliffe, a marine biologist and cave diving authority at Texas A&M University at Galveston, studies animals that inhabit salt water caves near the coast. Diving, he tells the Monitor, is “absolutely critical” to his work.

“They have a layer of fresh or brackish water on the surface,” with the heavier salt water lying beneath. “The animals I’m looking for occur only in this deep salt water layer in caves, and only by diving can we access this environment.”

“There’s untapped potential here” for scientists, he says. And he doesn’t pass over the charms of the experience. “For the appropriate person, it can be absolutely fascinating and bewitching.”

You've read  of  free articles. Subscribe to continue.

Dear Reader,

About a year ago, I happened upon this statement about the Monitor in the Harvard Business Review – under the charming heading of “do things that don’t interest you”:

“Many things that end up” being meaningful, writes social scientist Joseph Grenny, “have come from conference workshops, articles, or online videos that began as a chore and ended with an insight. My work in Kenya, for example, was heavily influenced by a Christian Science Monitor article I had forced myself to read 10 years earlier. Sometimes, we call things ‘boring’ simply because they lie outside the box we are currently in.”

If you were to come up with a punchline to a joke about the Monitor, that would probably be it. We’re seen as being global, fair, insightful, and perhaps a bit too earnest. We’re the bran muffin of journalism.

But you know what? We change lives. And I’m going to argue that we change lives precisely because we force open that too-small box that most human beings think they live in.

The Monitor is a peculiar little publication that’s hard for the world to figure out. We’re run by a church, but we’re not only for church members and we’re not about converting people. We’re known as being fair even as the world becomes as polarized as at any time since the newspaper’s founding in 1908.

We have a mission beyond circulation, we want to bridge divides. We’re about kicking down the door of thought everywhere and saying, “You are bigger and more capable than you realize. And we can prove it.”

If you’re looking for bran muffin journalism, you can subscribe to the Monitor for $15. You’ll get the Monitor Weekly magazine, the Monitor Daily email, and unlimited access to CSMonitor.com.

QR Code to Despite deaths, here's why scientists still call cave diving 'critical'
Read this article in
https://www.csmonitor.com/Science/2016/1019/Despite-deaths-here-s-why-scientists-still-call-cave-diving-critical
QR Code to Subscription page
Start your subscription today
https://www.csmonitor.com/subscribe