Taxonomy term

climate change

Still in a haze: What we don't know about black carbon

Black carbon — fine particles of soot in the atmosphere produced from the burning of fossil fuels or biomass — has been known to be a health hazard for decades, a major contributor to the thick hazes of pollution hovering over cities around the world.

14 Mar 2011

Voices: Humans at high temperatures

Reconsidering the economic implications of climate change

How much will it cost to implement plans to mitigate climate change? And if we don’t implement changes, what will the cost of climate change be?

31 Jan 2011

Highlights of 2010: Definitive statements: a new trend?

“This is the way it was.” Or: “This is what is happening.” Hmmm. Scientists don’t usually make such definitive statements, given that in science, there are almost always caveats. Yet in the last year, such statements have been issued by several large groups of scientists who have come together to support a certain point of view. Are scientists feeling the need to dig in their heels because of public pressures? Or are we actually reaching some consensus?

10 Dec 2010

Blogging on EARTH: Climate change threatens Virginia's vacation spots

Each year, millions of visitors flock to Virginia’s natural wonders, such as Shenandoah National Park, and to historical landmarks, like Jamestown, one of America’s earliest colonies. But a new report by the National Resources Defense Council (NRDC) states that many of Virginia’s landmarks are jeopardized by climate change.

03 Sep 2010

Is it time to invest in entrepreneurial geoengineering?

Government research and development has its limits: Time, money and bureaucracy can all hamper the timely progress of research. As a result, many federal agencies are looking to private companies to help drive new innovation and keep costs down — but it’s never that simple. Two current hot-button topics — returning humans to space and geo­engin­eer­ing — highlight a range of issues related to how private and public investment in science can coexist. Last month, we looked at NASA’s push toward privatization.

02 Aug 2010

Comment: Volcanic versus anthropogenic carbon dioxide: The missing science

“Volcanoes add far more carbon dioxide to the oceans and atmosphere than humans.” So says geologist Ian Plimer of the University of Adelaide in his 2009 best seller “Heaven and Earth: Global Warming — the Missing Science.” With this assertion, Plimer brings volcanic carbon dioxide degassing front and center in the climate change debate, reviving and reinforcing this wildly mistaken notion.

30 Jul 2010

The impact at El'gygytgyn crater

Moment of impact: As the asteroid hits the ground with a velocity of several tens of kilometers per second, a shock wave is generated that penetrates radially into the ground and compresses the rocks.

Contact/compression stage
Christian Koeberl, University of Vienna

 

 

 

 

 

 

 

 

20 Jul 2010

The thrill to drill in the chill

Nearly 3.6 million years ago, a large asteroid slammed into Earth in what is today northeastern Russia. Within minutes, the impact formed an 18-kilometer-wide hole in the ground that then filled with water.

20 Jul 2010

Local coastal impacts underestimated from sea-level rise

Most studies indicate that sea levels will rise over the next century due to melting glaciers, more ice breaking off the Antarctic ice sheet and thermal expansion — and there is great variation in how much scientists estimate seas will rise. But that’s not even the most important question, according to a new study. Instead, researchers should be looking at relative sea-level rise — how much rising seas will affect individual regions. And when you break it down by region, the study suggests, the outlook isn’t promising.

09 Jul 2010

Hazardous Living: Climategate climatologists cleared of wrongdoing

Last November, a thousand private e-mails between prominent climatologists were hacked, resulting in a brouhaha that threatened to discredit the work presented in the Nobel Prize-winning Intergovernmental Panel on Climate Change’s Fourth Assessment Report.

08 Jul 2010

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