Tag: global warming

Global warming means major changes for U.S. fisheries

Warming ocean will drive many commercially important species to new habitats; detailed projections can help  coastal communities adapt

Shrimp boats in the Gulf of Mexico. @bberwyn photo.

Staff Report

Climate change isn’t just heating the surface of the Earth. It’s also warming deep ocean water, and along the coast of the northeastern U.S. bottom-water temperatures are expected to increase by 6.6 to 9 degrees Celsius by 2100.

That means that commercially important marine species will also continue to shift northward, which is important information for fishermen trying to make living in the region. Just how much and when they will move is the subject of new research published this week in the journal Progress in Oceanography. Continue reading “Global warming means major changes for U.S. fisheries”

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Global warming drives more extreme rainfall

Summer rainstorm in the Rocky Mountains. @bberwyn photo.

New study pinpoints regional patterns in changes

Staff Report

Basic physics tells us a warmer atmosphere can hold more moisture, and that, at some point, that moisture will condense and fall as rain. That’s why climate scientists are certain that global warming will lead to more extreme rainfall, as has already been documented in various parts of the world the past few decades.

A new study now helps quantify the impact of warming and also reveals regional patterns that will help people prepare. According to the researchers with MIT and the Swiss Federal Institute of Technology, the most extreme rain events in most regions of the world will increase in intensity by 3 to 15 percent, depending on region, for every degree Celsius that the planet warms. Continue reading “Global warming drives more extreme rainfall”

How does global warming affect flows in the Rio Grande?

New study to help water planners in changing climate

A 2016 Landsat 8 image of the Lower Rio Grande canyons courtesy NASA Earth Observatory.

Staff Report

There are more and more signs that global warming triggered a step-change in many natural systems in the 1980s. A new study, led by scientists with the National Center for Atmospheric Research, tracked a big change in flows in the Rio Grande watershed, a key source of water in New Mexico and Texas.

According to the study, the percentage of precipitation that becomes streamflow in the Upper Rio Grande watershed has fallen more steeply than at any point in at least 445 years.

In another recent study, European researchers showed how major lakes across Central Europe warmed dramatically starting about that same time, and the meltdown of Arctic ice has also accelerated rapidly since then. Continue reading “How does global warming affect flows in the Rio Grande?”

Antarctica is melting all over

No ice build-up in East Antarctica, new study says

Antarctica permafrost
Antarctica is melting all over. @bberwyn photo.

Staff Report

Despite some suggestions that increased has bolstered the vast East Antarctic ice sheet, it appears the frozen continent is still shedding ice and has been a net contributor to sea level rise since at least 2003.

There’s been little doubt during the last decade that the West Antarctic Ice Sheet has been losing mass, but the picture has been much less clear to the east, where there’s enough ice to raise global sea level by some 50 meters. One study led by NASA researchers in 2015 suggested that this part of Antarctica was gaining so much mass that it compensated for the losses in the west. Continue reading “Antarctica is melting all over”

April ends up as second-warmest on record for Earth

Will El Niño re-emerge?

The Copernicus Climate Change Service says April 2017 was the second-warmest April on record.

Staff Report
European climate trackers say that April extended a stretch of exceptionally warm global weather going back to mid-2015. The warmth peaked in February 2016 at the height of Pacific Ocean El Niño, then gradually dropped off through June. But in July and August 2016 global temperatures surged upward once again and have stayed high since, according to the latest update from the Copernicus Climate Change Service.

February and March 2017 were the most anomalous months since April 2016. April 2017 was less extreme, but the average global temperature was still 0.51 degrees Celsius warmer than the average between 1981 and 2010 and the second-warmest April on record for the planet. Continue reading “April ends up as second-warmest on record for Earth”

Global warming threatens key ocean bacteria

Loss of nitrogen-fixers would ripple through ocean ecosystems

Increasing CO2 concentrations may threaten fundamental ocean chemistry. @bberwyn photo.

Staff Report

In another sign that greenhouse gas emissions are going to fundamentally affect ecosystems in ways that we are just beginning to understand, a team of researchers has shown that bacteria in the ocean are losing their ability to fix nitrogen.

The study, published in the journal Science, took a close look at a type of cyanobacteria called Trichodesmium, which through nitrogen fixation, Trichodesmium converts nitrogen gas into ammonia and other molecules that organisms need for survival. Continue reading “Global warming threatens key ocean bacteria”

EPA removes web pages with climate change information

Will updates reflect real science, or ideology?

Many of the previously existing pages on climate science, greenhouse gases and global warming impacts are no longer available at the current EPA website.

By Bob Berwyn

Continuing its Orwellian policies of trying to create an alternative, fact-free reality, the Trump administration has started to remove climate-related information from the EPA website. As of Friday, April 28, a Google search for EPA climate information leads to a page-update notice, including a statement from a politically appointed spokesperson saying,” “We want to eliminate confusion by removing outdated language first and making room to discuss how we’re protecting the environment and human health by partnering with states and working within the law.” Continue reading “EPA removes web pages with climate change information”