Image from TERRA
Thu, 05 Nov 2020 13:05 EST

Annapolis, Maryland; Norfolk, Virginia; and Miami were originally built and mapped to provide enough protection against flooding, but sea level rise has caused that buffer to shrink.

Image from TERRA
Thu, 22 Oct 2020 11:00 EDT

NASA scientists are combining data from water samples containing fish DNA with satellite data to find native fish and identify their habitats.

Image from TERRA
Fri, 25 Sep 2020 10:00 EDT

The August Complex Fire and others this fire season have been sending far-reaching plumes of wildfire smoke into the atmosphere that worsen air quality in California and beyond. Predicting where that smoke will travel and how bad the air will be downwind is a challenge, but Earth-observing satellites can help.

Vegetation Limits City Warming Effects

isatemps_gis_2001The amount of vegetation in a city is an important factor in the urban heat island, where temperatures in urban areas rise an average of 1 to 3°C due to the absorption of  heat by asphalt, concrete, stone, steel, and other impervious surfaces. Vegetation helps cool these areas and a new study by NASA, shows how essential plant cover is.   Researchers modeled urban areas and their surroundings, using data from multiple satellites including MODIS on-board both Terra and Aqua and Landsat 7’s Enhanced Thematic Mapper Plus (EMT+), finding that areas covered partly by impervious surfaces had an average summer temperature 1.9°C higher than surrounding rural areas. In winter, the temperature difference was 1.5 °C higher. Lahouri Bounoua, a researcher at Goddard Space Flight Center and lead author, along with his colleagues used the model environment to simulate what the temperature would be for a city if all the impervious surfaces were replaced with vegetation.

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