Tag Archives: sea level rise

In High Sierras, Remnants of Ice Age Tell a Tale of Future Climate

(First published on Feb. 14, 2017, on State of the Planet.)

Aaron Putnam sits atop a boulder high in the Sierras of central California, banging away with hammer and chisel to chip out a sample of ice age history. Each hunk of rock is a piece of a vast puzzle: How did our climate system behave the last time it warmed up like it’s doing today?

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Study Downgrades Groundwater Contribution to Sea Level Rise

Groundwater pumping for agriculture and other uses has risen sharply. But a new study says it isn’t contributing as much as previously thought to sea level rise.

(First published on May 3, 2016, on State of the Planet.)

Some research suggests that, along with melting ice sheets and glaciers, the water pumped from underground for irrigation and other uses, on the rise worldwide, could contribute substantially to rising sea levels over the next 50 years. A new study published in Nature Climate Change says the magnitude is much lower than previously estimated.

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Optimism, But Also a Hard Bottom Line for Island States

Students from the University of Waterloo in Canada had a breakfast meeting with the Kiribati delegation and met the island nation’s president, Anote Tong, on Dec. 6. From left: Kadra Rayale, Rija Rasul, Tong, Vidya Nair and Laura Maxwell.

(First published on Dec. 10, 2015, on State of the Planet.)

Four students in the Masters in Development Practice program at the University of Waterloo in Canada are in Paris for the UN climate summit to represent the Republic of Kiribati. The small island nation is one of several threatened by sea level rise.

This week they have been sitting in on various thematic discussions. Rija Rasul reports she has attended climate finance discussions. Her colleagues Laura Maxwell and Kadra Rayale have been in sessions on adaptation to, and loss and damage from climate change. Vidya Nair has been in discussions about technology and capacity building.

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In 2015, Hot, Wet and Opinionated

Map: NOAA

(First published Oct. 23, 2015, on State of the Planet.)

Three interesting pieces of news about climate change, in case you missed them:

For starters, 2015 is shaping up to be the warmest year on record since 1880, according to new data from the National Oceanic and Atmospheric Administration.

Potential sea level rise in Guilford, CT. Source: Climate Central

Second, if you’re wondering about the longer-term impacts of climate change: Climate Central has produced a startling new, interactive graphic that shows the potential effects of sea level rise, should the world continue to grow warmer, melting more and more of the world’s ice sheets and glaciers. From a general view of the impacts on the United States, you can drill down into the graphic and see what’s likely to happen in your nearest coastal community. You can adjust the scene to see what might happen under various scenarios, should we actually succeed in cutting back carbon emissions.

Translation? My former hometown’s downtown would be pretty much under water, along with a substantial stretch of the Amtrak line running up through coastal Connecticut, by the end of the century. Posted Oct. 14, you can check it out here—just in case you want to plan ahead.

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Big Melt in Frontierland: Alaska’s Lessons in Global Warming

Seward, Alaska

Sailing out from Seward.

Note: The following story was reported and written in 2007, for The Hartford Courant. Editors there declined to run it. I like the story anyway, and pretty much everything it says has been repeatedly validated by subsequent scientific research. It’s still going on – even in Connecticut. I’ve added a couple of notes in brackets in the text where updates seemed appropriate. — DF

SEWARD, Alaska — The Glacier Express chugged out of Resurrection Bay, and the blowing rain turned to sleet that lashed across the upper deck. White clouds shrouded the dark gray mountains that drop steeply into the sea.

This had been one of Alaska’s coldest and wettest summers. As they headed toward Kenai Fjords National Park, passengers aboard the sightseeing boat, some wrapped in fleece and rain gear in mid-August, had good reason to wonder what had happened to global warming.

But Alaska, frontierland of huge landscapes and volatile weather, is indeed warming. In the past 50 years, the state’s annual average temperature is up as much as 5.5 degrees. Overall, the Arctic region has warmed almost twice as fast as the rest of the world.

The greenhouse gas problem fueled by our crowded and busy civilization affects this remote region now, directly and in many ways — including fading sea ice, melting glaciers, thawing permafrost and changes in habitats that have been the same for thousands of years.

But this is not Alaska’s problem alone. The effects of warming in Alaska and the rest of the Arctic will reverberate all over the globe.

Even in Connecticut.

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Ice Loss in West Antarctic is Speeding Up

Glaciers seen during NASA’s Operation IceBridge research flight to West Antarctica on Oct. 29, 2014. Photo: NASA/Michael Studinger

Glaciers seen during NASA’s Operation IceBridge research flight to West Antarctica on Oct. 29, 2014. Photo: NASA/Michael Studinger

Glaciers in one part of West Antarctica are melting at triple the rate of a decade ago and have become the most significant contributor to sea level rise in that region, a new study says.

The study found that the glaciers in the Amundsen Sea Embayment of West Antarctica have shrunk by an average of 83 gigatons a year for two decades—the equivalent of the weight of Mount Everest every two years. And the loss rate is accelerating: The scientists estimate ice loss at 102 gigatons per year for 2003-2011.

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Clock is Ticking in West Antarctic

The leading edge of the floating ice tongue of the Pine Island Glacier, Antarctica. Photo: M. Wolovick

The leading edge of the floating ice tongue of the Pine Island Glacier, Antarctica. Photo: M. Wolovick

(First posted May 23, 2014 on State of the Planet.)

Reports that a portion of the West Antarctic Ice Sheet has begun to irretrievably collapse, threatening a 4-foot rise in sea levels over the next couple of centuries, surged through the news media last week. But many are asking if even this dramatic news will alter the policy conversation over what to do about climate change.

Glaciers like the ones that were the focus of two new studies move at, well, a glacial pace. Researchers are used to contemplating changes that happen over many thousands of years.

This time, however, we’re talking hundreds of years, perhaps — something that can be understood in comparison to recent history, a timescale of several human generations. In that time, the papers’ authors suggest, melting ice could raise sea levels enough to inundate or at least threaten the shorelines where tens of millions of people live.

“The high-resolution records that we’re getting and the high-resolution models we’re able to make now are sort of moving the questions a little bit closer into human, understandable time frames,” said Kirsty Tinto, a researcher from Lamont-Doherty Earth Observatory who has spent a decade studying the Antarctic.

“We’re still not saying things are going to happen this year or next year. But it’s easier to grasp [a couple of hundred years] than the time scales we’re used to looking at.”

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