Arctic sea ice has reached record low coverage in 2007.
From NASA EOS:
This image shows the Arctic as observed by the Advanced Microwave Scanning Radiometer for EOS (AMSR-E) aboard NASA’s Aqua satellite on September 16, 2007. In this image, blue indicates open water, white indicates high sea ice concentration, and turquoise indicates loosely packed sea ice. The black circle at the North Pole results from an absence of data as the satellite does not make observations that far north.
Three contour lines appear on this image. The red line is the 2007 minimum, as of September 15, and it almost exactly fits the sea ice observed by AMSR-E. Depending on the calculations, the minimum occurred on September 14 (one-day running average) or September 16 (five-day running average). The green line indicates the 2005 minimum, the previous record low. The yellow line indicates the median minimum from 1979 to 2000.
Map of international phone-call traffic in 2005, from Telegeography. The map shows the disproportionate centrality of the USA in international telephone traffic.
via Wired
From NASA Earth Observer Seasonal Rain Floods the Sahel:
The Sahel region gets most of its rainfall between June and September when the band of near-perpetual thunderstorms that hover around the Equator shifts north. In 2007, the final months of the rainy season brought unusually heavy rainfall to East, Middle, and West Africa, causing floods in river basins from the Atlantic to the Indian Ocean coasts of the continent.
This image illustrates how extensive the extreme rainfall was. The image was made with data collected by the Tropical Rainfall Measuring Mission (TRMM) satellite between August 20 and September 21, 2007. The average daily totals recorded during this period are compared with average rainfall totals recorded during the same period since TRMM’s launch in 1997.
Regions that received more rain per day than average are blue and green, while places that received less rain would be red, orange, or yellow. The image reveals that most of the Sahel received more rain per day than average in August and September. Some places, marked with pale blue, got as much as 15 millimeters more rain than average per day. The northern Sahel, by contrast, was slightly drier than average, as indicated by its pale yellow tint.
The unusually heavy rains caused flooding in as many as 17 countries and affected more than a million people across Africa. … For those areas that escaped flooding, the rains were beneficial, since farmers in the Sahel rely on rain to water their crops, reported the Famine Early Warning System Network on September 19.
For more on the flooding see BBC news Sept 19th, and BBC news Sept 21st.
Mark Newman (see previous post Another world population map) has used his cartogram technique to make a series of sharp cartograms of the world (smoother than these rougher cartograms), some of which are shown below (land area, population, GDP, and GHG emissions):
Continue reading ‘More cartograms: Population, GDP, & more’
Following up on the population world map post - an more detailed version of the population adjusted world map is below. It would be great to have some other distorted world maps (of wealth, health, etc) to compare this one against.
From Cartography: A popular perspective in Nature 439(800) Continue reading ‘Another world population map’
