Thursday January 18, 2018
Home Science & Technology Climate chang...

Climate change will proceed faster than expected: Study

0
//
32
Republish
Reprint

London: Because increased temperature also affects greenhouse gas emissions that arise naturally, global warming will progress faster than what was previously believed, projects a new study.

The findings suggest a vicious circle of greenhouse gas emissions from the burning of fossil fuels lead to higher temperatures, which in turn lead to increased natural emissions and further warming.

This means that warming will be faster than expected from anthropogenic greenhouse gas emissions alone, the researchers noted.

“We are not talking about hypotheses anymore. The evidence is growing and the results of the detailed studies are surprisingly clear. The question is no longer if the natural emissions will increase but rather how much they will increase with warming,” said one of the researchers David Bastviken, a professor at Linkoping University in Sweden.

The researchers examined the emissions of the greenhouse gas methane from three lakes.

The effects were clear and the methane emissions increased exponentially with temperature.

Their measurements showed that a temperature increase from 15 to 20 degrees Celsius almost doubled the methane level.

“Everything indicates that global warming caused by humans leads to increased natural greenhouse gas emissions. Our detailed measurements reveal a clear pattern of greater methane emissions from lakes at higher temperatures,” study lead author Sivakiruthika Natchimuthu from Linkoping University pointed out.

The findings were published in the journal Limnology and Oceanography.

(IANS)

(Picture credit:uswateralliance.org)

Click here for reuse options!
Copyright 2015 NewsGram

Next Story

Climate change can have an effect on the taste of the wines

0
//
24
Climate change can have an effect on the taste of the wine
Climate change can have an effect on the taste of the wine. wikimedia commons

New York, Jan 3, 2018: Although winegrowers seem reluctant to try new grape varieties apparently to protect the taste of the wines, new research suggests that they will ultimately have to give up on their old habit as planting lesser-known grape varieties might help vineyards to counteract some of the effects of climate change.

vineyards. wikimedia commons

“It’s going to be very hard, given the amount of warming we’ve already committed to… for many regions to continue growing the exact varieties they’ve grown in the past,” said study co-author Elizabeth Wolkovich, Assistant Professor at Harvard University.

“With continued climate change, certain varieties in certain regions will start to fail — that’s my expectation,” she said.

The study, published in the journal Nature Climate Change, suggests that wine producers now face a choice — proactively experiment with new varieties, or risk suffering the negative consequences of climate change.

“The Old World has a huge diversity of wine grapes — there are overplanted 1,000 varieties — and some of them are better adapted to hotter climates and have higher drought tolerance than the 12 varieties now making up over 80 per cent of the wine market in many countries,” Wolkovich said.

“We should be studying and exploring these varieties to prepare for climate change,” she added.

Unfortunately, Wolkovich said, convincing wine producers to try different grape varieties is difficult at best, and the reason often comes down to the current concept of terroir.

Terroir is the notion that a wine’s flavour is a reflection of where which and how the grapes were grown.

Thus, as currently understood, only certain traditional or existing varieties are part of each terroir, leaving little room for change.

The industry — both in the traditional winegrowing centres of Europe and around the world — faces hurdles when it comes to making changes, Wolkovich said.

In Europe, she said, growers have the advantage of tremendous diversity.

They have more than 1,000 grape varieties to choose from. Yet strict labelling laws have created restrictions on their ability to take advantage of this diversity.

For example, just three varieties of grapes can be labelled as Champagne or four for Burgundy.

Similar restrictions have been enacted in many European regions – all of which force growers to focus on a small handful of grape varieties.

“The more you are locked into what you have to grow, the less room you have to adapt to climate change,” Wolkovich said.

New World winegrowers, meanwhile, must grapple with the opposite problem — while there are few, if any, restrictions on which grape varieties may be grown in a given region, growers have little experience with the diverse — and potentially more climate change adaptable — varieties of grapes found in Europe, the study said.

Just 12 varieties account for more than 80 per cent of the grapes grown in Australian vineyards, Wolkovich said.

More than 75 per cent of all the grapes grown in China is Cabernet Sauvignon — and the chief reason why has to do with consumers.

“They have all the freedom in the world to import new varieties and think about how to make great wines from a grape variety you’ve never heard of, but they’re not doing it because the consumer hasn’t heard of it,” Wolkovich said. (IANS)

Next Story