Mapping Global Landslide Susceptibility

Image: Jesse Allen. Landslide susceptibility data: Thomas Stanley and Dalia Kirschbaum (NASA/GSFC). Topographic data: SRTM. (NASA Earth Observatory)

NASA Earth Observatory notes the release of a new map of global landslide susceptibility that models the risks of landslides that are triggered by heavy rain. “The map is part of a broader effort to establish a hazards monitoring system that combines satellite observations of rainfall from the Global Precipitation Measurement (GPM) mission with an assessment of the underlying susceptibility of terrain.” [Geographical]

Mapping Global Sea Surface Height

Credit: NASA/JPL Ocean Surface Topography Team.

Jason-3 is the latest earth observation satellite tasked with measuring global sea surface height; its data will be used in weather and climate research (e.g., El Niño, climate change). Launched on January 17, it’s now in its six-month checkout phase and has produced its first complete map, which corresponds well with the map produced by the still-operational Jason-2 satellite, so that’s a good sign. [via]

Mapping Nitrogen Dioxide Pollution

A decade’s worth of data from the Ozone Monitoring Instrument aboard the Aura satellite reveals the change in global nitrogen dioxide (NO2) pollution from 2005 to 2014: down significantly in some areas, due to stricter emissions controls, but up sharply in others. More at NASA Earth Observatory.

New Year’s Flooding in the Midwest

These two Landsat images illustrate the extent of flooding along the Wabash and Illinois Rivers at the end of last year, as 6-10 inches of rain fell over the midwestern United States. The image from 8 December 2015, above left, shows normal water levels; the image from 1 January  2016, above right, shows the rivers in flood. Use the slider to compare the two views. Original image. [via]

Pacific Ocean Time Lapse

Clouds swirl across the Pacific Ocean in this time lapse. The data is from Himawari-8, a Japanese weather satellite in geostationary orbit over New Guinea. Every 10 minutes, it photographs the hemisphere below it. This animation is a loop of yesterday’s images. Strong winds head from East Asia, in the upper left, toward Alaska, hidden by clouds in the upper right. Australia is in the bottom center, with the edge of the Antarctic ice sheet below it and tropic storm Ula to its right. The reflection of the sun on smooth water, called sunglint, moves east to west across the Pacific just south of the Equator. At this time of year – the Southern Hemisphere’s summer – the North Pole is never sunlit, but the South Pole always is.

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From Mapbox’s Instagram account (via).

Mapping the Thaw

Scientists have been tracking seasonal freeze-thaw patterns for 30 years. This map, produced from data collected by NASA’s Soil Moisture Active Passive satellite, “shows the freeze-thaw status of areas north of 45 degrees latitude on March 5, 2015, as spring approached. Frozen land is blue; thawed land is pink. The measurement is possible because frozen water forms crystalline structures that can be detected by satellites.” NASA Earth Observatory.