Stories tagged fires

Aug
20
2010

We have heard about the many fires in Russia. NASA satellites have detected over 600 600 hotspots from wildfires within Russian territory in one day!

Fires produce a heat signature that is detectable by satellites even when the fires represent a small fraction of the pixel. Fires produce a stronger signal in the mid-wave IR bands (around 4 microns) than they do in the long wave IR bands (such as 11 microns). That differential response forms the basis for most algorithms that detect the presences of a fire, the size of the fire, the instantaneous fire temperature.

The unusually hot and dry mid-August conditions beneath a strong ridge of high pressure across British Columbia led to a major outbreak of wildfires across that western Canadian province. The satellite image shows the location of those fires as red squares. The smoke plumes are also seen on the satellite imagery.

Here's an image from a NASA instrument: The red squares are fire locations and the smoke from the fires is evident.
http://rapidfire.sci.gsfc.nasa.gov/gallery/?2010228-0816/BritishColumbia...

The aerosols released by fires and the degraded air quality caused by them represent tremendous costs to society, so reliable information on fire locations and characteristics is important to a wide variety of users. For this reason, NOAA tracks these plumes and makes them publically available from NOAA at:
http://www.osdpd.noaa.gov/ml/land/hms.html

Aug
03
2010

Extreme heat, fires, and flooding

Weather hazard
Weather hazardCourtesy NOAA
In my previous post about our global warming trend you were told to expect more extreme rainfalls and record setting heat. Examples of each have recently made the news.

Globally, at least 14 different countries have reported all-time record high temperatures this year. AOL News

  • Moscow, Russia 102° F
  • Maryland and Virginia 105° F
  • Finland 99° F
  • Saudi Arabia &Iraq 125.6° F
  • Pakistan 128.3° F

Russia declares fires "a natural disaster"

"President Dmitry Medvedev called the fires "a natural disaster" Discovery News

Hundreds of thousands of firefighters, including army troops battled forest fires raging across central Russia in a heat wave that has killed more than 30 people.

Devastating floods in China and Pakistan

Over a thousan people have died or are missing in central and southern China in the country's worst floods in more than a decade. The huge Three Gorges Dam, designed to withstand a 10,000 year flood, was within 20m of overflowing.

Over a million people are effected by the flooding in Pakistan. In Swat alone, the floods have destroyed more than 14,600 houses and 22 schools.