Winds imaged by Aeolus

στις

Winds_imaged_by_Aeolus_node_full_image_2

First wind data from ESA’s Aeolus satellite. These data are from three quarters of one orbit around Earth. The image shows large-scale easterly and westerly winds between Earth’s surface and the lower stratosphere, including jet streams. As the satellite orbits from the Arctic towards the Antarctic, it senses, for example, strong westerly winds streams, called tropospheric vortices (shown in blue) each side of the equator at mid latitudes. Orbiting further towards the Antarctic, Aeolus senses the strong westerly winds (shown in blue left of Antarctica and in red right of Antarctica) circling the Antarctic continent in the troposphere and stratosphere (Stratospheric Polar Vortex). The overall direction of the wind is the same along the polar vortex, but because the Aeolus wind product is related to the viewing direction of the satellite, the colour changes from blue to red as the satellite passes the Antarctic continent.

Just one week after ESA’s Aeolus satellite shone a light on our atmosphere and returned a taster of what’s in store, this ground-breaking mission has again exceeded all expectations by delivering its first data on wind – a truly remarkable feat so early in its life in space.

Florence Rabier, Director General of the European Centre for Medium-Range Weather Forecasts (ECMWF), said, “We always knew that Aeolus would be an exceptional mission, but these first results have really impressed us.

“The satellite hasn’t even been in orbit a month yet, but the results so far look extremely promising, far better than anyone expected at this early stage.

“We are very proud to be part of the mission. Aeolus looks set to provide some of the most substantial improvements to our weather forecasts that we’ve seen over the past decade.”

ESA’s Aeolus mission scientist, Anne Grete Straume, explained, “These first wind data shown in the plot made by ECMWF are from one orbit. In the profile we can see large-scale easterly and westerly winds between Earth’s surface and the lower stratosphere, including jet streams.

Earth_s_wind_patterns_node_full_image_2.jpg

  • Title Earth’s wind patterns
  • Released 09/03/2004 3:02 pm
  • Copyright ESA/AOES Medialab
  • DescriptionThe movement of air constitutes the general circulation of the atmosphere, transporting heat away from equatorial regions towards the poles, and returning cooler air to the tropics. Atmospheric circulation in each hemisphere consists of three cells – the Hadley, Ferrel and polar cells. High-speed wind fields, known as ‘jets’, are associated with large temperature differences.

“In particular, you can see strong winds, called the Stratospheric Polar Vortex, around the South Pole. These winds play an important role in the depletion of the ozone layer over the South Pole at this time of the year.”

Named after Aeolus, who in Greek mythology was appointed ‘keeper of the winds’ by the Gods, this novel mission is the fifth in the family of ESA’s Earth Explorers, which address the most urgent Earth-science questions of our time.

It carries the first instrument of its kind and uses a completely new approach to measuring the wind from space.

ESA’s Earth Explorer Programme manager, Danilo Muzi, said, “Aeolus carries revolutionary laser technology to address one of the major deficits in the Global Observing System: the lack of direct global wind measurements.

“The essence of an Earth Explorer mission is to deliver data that advances our understanding of our home planet and that demonstrates cutting-edge space technology. With the first light measurements and now these amazing wind data, Aeolus has wowed us on both fronts.”

 

Ozone_hole_Antarctica_node_full_image_2.jpg

  • Title Ozone hole, Antarctica
  • Released 12/09/2018 1:16 pm
  • Copyright KNMI–Temis
  • Description

    Ozone hole over Antarctica on 4 September 2018.  Strong winds, called the Stratospheric Polar Vortex, around the South Pole play an important role in the depletion the ozone at this time of the year. Low ozone is shown in blue and high in pink.

 

ESA’s Aeolus instrument manager, Denny Wernham, noted, “These first results are truly amazing. It took years to develop this remarkable mission and everyone’s hard work is really paying off.

“Aeolus’ Aladin instrument is extremely sensitive. When we switched it on we increased its energy levels step by step, checking it after every move.

“It is indeed wonderful to see that it is behaving superbly so soon after launch.”

Nicola Chamussy, Head of Airbus Space Systems, said, “These initial results look wonderful. Thanks to the meticulous preparatory work and testing, the mission is in really good shape. Our Aladin system engineer, Olivier Lecrenier, tells me that it has exceeded his best expectations.

“Huge congratulations to everyone involved in this world first.”


cover image:

Keeper_of_the_winds_node_full_image_2.jpg

  • Title Keeper of the winds
  • Released 21/04/2015 10:20 am
  • Copyright ESA/ATG medialab
  • DescriptionNamed after Aeolus, who in Greek mythology was appointed ‘keeper of the winds’ by the Gods, the novel Aeolus mission will not only provide much-needed data to improve the quality of weather forecasts, but also contribute to long-term climate research.


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