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CADGIS
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Map, CAD, GIS, Science informations
Map, CAD, GIS, Science informations

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A Dry Start to South America’s Wet Season

Even before the 2016 dry season started in South America, a marked deficit in rainfall was apparent across much of the continent. Parts of the Amazon, for example, were already far drier than in 2005 and 2010, the last serious drought years. Now, as the wet season approaches, intense drought still runs deep across the Amazon basin and much of Brazil.

This map shows the accumulated deficit in rainfall flowing into surface and groundwater storage as of October 2016. The data were compiled by the Global Precipitation Climatology Centre, which analyzes precipitation data collected from rain gauges. Red areas show the level of the rainfall deficit compared to the norm for October, while blue areas had more than usual amounts of rainfall.

Some areas fared better than others. For example, Brazil’s largest city, São Paulo, is located between areas that were anomalously dry (to the north) and others that were anomalously wet (south). The city has reportedly received sufficient rain since late 2015 to begin raising the water level in its main reservoir system.

But as the map also shows, rainfall elsewhere in Brazil and the Amazon was far below normal for October. It remains to be seen whether the rainfall associated with the wet season can break the ongoing drought.

“In Brazil, the rainy season is the austral summer, from December to March,” said Augusto Getirana, a hydrologist and remote sensing scientist at NASA’s Goddard Space Flight Center. “It’s hard to tell if this summer will be the same, but considering the pattern of previous years, my guess would be a yes.”

Getirana knows well the patters of recent years. In February 2016, he published a satellite-based study showing that southeastern Brazil lost 6.1 centimeters of water per year from 2012 to 2015. That may not sound like much, but in terms of volume over the entire area, that’s 56 trillion liters of water.

http://go.nasa.gov/2gq3ufb
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Between 2008 and 2009, a 750 sq km-area of ice in the northern Antarctic – known as the Wilkins Ice Shelf – partly disintegrated. At the time, ESA’s #Envisat satellite monitored the event with the help of the DLR German Aerospace Center’s #TerraSARX mission.

While the event itself made headlines, scientists got to work studying the ice’s behaviour before the break-up and continued to monitor the area for years afterward.

Read more on how we're sharing #EarthObservation satellite date to help understand our planet:  http://www.esa.int/Our_Activities/Observing_the_Earth/Sharing_Earth_observation_satellite_data_to_help_understand_our_planet

Credit: JAXA, ESA, contains modified Copernicus Sentinel data (2015)
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Thank you for GEB reader Jonah for being the first to let us know. Google has added yearly global mosaics using Landsat and Sentinel 2 data going back to 1985. Google has long had these mosaics on Google Earth Engine which also provides a ‘Timelapse’ tool. As of this writing, the Google Earth Engine timelapse only goes up to 2012 but that will likely be updated too.

http://www.gearthblog.com/blog/archives/2016/11/google-earth-now-global-landsat-sentinel-2-data-1985-2016.html

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What's Across the Ocean?

These maps tell you which country lies across the ocean.

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Our first encounter with this beautiful pictorial map for Bavaria. A post war image that reflects on the 19th century simplicity and the beauty of the landscape. #oldmapgallery #pictorialmaps #bavaria #oldmaps
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Some of our favorite cartographers have an ability to turn complexity into beauty. Not unlike F.W. Egloffstein who a century prior depicted the dramatic terrain of the West in maps that were intuitively clear, detailed and visually rich. Erwin Raisz made hand drawn topographical maps in the 20th century that had that same character. Here is Raisz' map for the Northwest US. #oldmapgallery #pictorialmaps #pacificnorthwest #oldmaps
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How the World is Connected

Connectography - a global map of the world's communication, transportation and energy networks.

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How to Map Your Videos

Map your videos with ease with Video Maps from Map Channels.
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