The AIRS instrument aboard NASA’s Aqua satellite collected temperature readings in the atmosphere and at the surface during an unprecedented heat wave in the Pacific Northwest and western Canada that started around June 26. Credits: NASA/JPL-Caltech
The science instrument mapped the dome of high pressure that settled over
the northwestern U.S. and western Canada in late June, sending temperatures
into the triple digits.
An unprecedented heat wave that started around June 26 smashed numerous
all-time temperature records in the Pacific Northwest and western Canada.
NASA’s Atmospheric Infrared Sounder (AIRS), aboard the Aqua
satellite, captured the progression of this slow-moving heat dome across the
region from June 21 to 30. An animation of some of the AIRS data show surface
air temperature anomalies – values above or below long-term averages. Surface
air temperature is something that people directly feel when they are outside.
In many cases, the highs exceeded previous temperature records by several
degrees or more. On June 28, Quillayute, Washington, set an all-time high
temperature record of 110 degrees Fahrenheit (43 degrees Celsius), shattering
the old record of 99 degrees Fahrenheit (37 degrees Celsius). Numerous weather
stations broke records on consecutive days, showing the unprecedented nature of
this extreme heat, which is also being blamed for a number of fatalities. In
British Columbia, the village of Lytton set a new all-time record for Canada at
119 degrees Fahrenheit (48 degrees Celsius) on June 29, only to break it the
next day with a reading of 121 degrees Fahrenheit (49 degrees Celsius).
The AIRS instrument recorded similar temperature anomalies at an altitude
of about 10,000 feet (3,000 meters), showing that the extreme heat also
affected mountainous regions. And temperature anomalies at roughly 18,000 feet
(5,500 meters) demonstrated that the heat dome extended high into Earth’s
troposphere, creating the conditions for intense heat at the planet’s surface
that are normally found farther south.
AIRS, in conjunction with the Advanced Microwave Sounding Unit (AMSU),
senses emitted infrared and microwave radiation from Earth to provide a
three-dimensional look at the planet’s weather and climate. Working in tandem,
the two instruments make simultaneous observations down to Earth’s surface.
With more than 2,000 channels sensing different regions of the atmosphere, the
system creates a global, three-dimensional map of atmospheric temperature and
humidity, cloud amounts and heights, greenhouse gas concentrations and many
other atmospheric phenomena. Launched into Earth orbit in 2002 aboard NASA’s Aqua
spacecraft, the AIRS and AMSU instruments are managed by NASA’s Jet Propulsion
Laboratory in Southern California, under contract to NASA. JPL is a division of
Caltech.
More information about AIRS can be found at: https://airs.jpl.nasa.gov/
Source: https://www.nasa.gov/feature/jpl/nasa-s-airs-tracks-record-breaking-heat-wave-in-pacific-northwest
No comments:
Post a Comment