This week scientists released some new pictures of retreating glaciers in Greenland, comparing them for the first time with pictures taken about 80 years ago. The top image taken in summer 2013 shows ice retreat af about two miles compared to the bottom picture taken in summer 1935.
These pictures were taken in the vicinity of Sukkertoppen Ice Cap in southwest Greenland. While the alignment of the pair here is not perfect, you get the idea by comparing shoreline landscape features.
Researcher Anders Bjørk of the Natural History Museum of Denmark has been re-photographing Greenland's retreating glaciers. Studying old photographs of the glaciers helped reveal a previously unknown period of rapid glacial melt in Greenland between 1900 and 1930, a time before satellite observations began.
"...Getting higher yields of corn and soybean from U.S. farms to feed more meat animals is not the problem. The main challenge for agricultural research is to get usable knowledge to farmers in places such as sub-Saharan Africa and southern Asia, so they can raise enough food for themselves and others, make money, and protect the land and water on their farms...."
A graphical representation of our rising impact on the planet since 1900, as derived from a formula called IPAT. The period since about 1950 has become known as "The Great Acceleration." More details at the link below.
A September 20, 2014 piece of mine at National Geographic on rising population and consumption of natural resources. This in light new population projections indicating our numbers will keep escalating past 2011.
New projections of escalating growth increase the tension between humanity’s expanding needs and what the planet can provide.
"...when we debate population, it's important to also discuss the impact—the how we live—of the population equation. While new projections of even higher world population in the decades ahead are cause for concern, we should be equally concerned about—and be willing to address—the increasing effects of resource consumption and its waste."
Attention Photographers Attending VISA pour l'image 2014:
Picture editors from National Geographic will be reviewing portfolios in Perpignan at the Palais de Congres. Dennis Dimick and Todd James will be on the 7th floor Wednesday (9/3) and Thursday (9/4) from 1330 to 1630 and Friday (9/5) from 1300-1500.
If you wish to make a 10-minute appointment, please contact Jake Rutherford, who is handling all scheduling. He can be found here on Facebook or on Twitter @jakerrutherford .
Tracy, California: On the west side of the San Joaquin Valley, June 2014. Groundwater drilling has increased in California's Central Valley to keep fields green during drought. Photo by Dennis Dimick
As surface water supplies in drought-prone regions disappear, we pump water from underground aquifers to make up the shortfall. Groundwater serves as our last defense against water scarcity, but this supply is also rapidly shrinking in several regions: California's Central Valley, the Colorado River Basin, the U.S. Great Plains, northern India, China's North Plain and the Middle East.
I write about this at National Geographic this week. Please take a look.