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The EISCAT_3D Science Case: Atmospheric Section. Ian McCrea STFC RAL. Preparatory Phase WP3: Science Case Work Package. Engaging with potential new users Holding targeted workshops Gathering requirements for new science Revising/developing the science case

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The EISCAT_3D Science Case: Atmospheric Section

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preparatory phase wp3 science case work package
Preparatory Phase WP3: Science Case Work Package
  • Engaging with potential new users
  • Holding targeted workshops
  • Gathering requirements for new science
  • Revising/developing the science case
  • Feeding science demands back to radar design
  • Issuing periodic versions of science case, consistent with the PSD
the science working group
The Science Working Group
  • Convenors: Anita Aikio, Ian McCrea
  • 5-10 members at any time
  • Mix of existing and new EISCAT users
  • Membership rotates annually
  • Cover a wide range of science topics
  • Atmospheric science, space weather, modelling...
  • Two meetings with each committee, email exchanges in between
timetable of activities
Timetable of Activities
  • Current WG members: Mark Clilverd, Markus Rapp, Yasonobu Ogawa, KjellmarOksavik, AstaPellinen-Wannberg.
  • First Meeting: FMI Helsinki 14/1/2011 (also KirstiKauristie and PekkaVerronen)
  • Second Meeting: Uppsala 17/5/2011 (also Stephan Buchert and Thomas Leyser)
  • First version of the science case due in Month 9 (July)
  • Next roll of WG: Space Weather and Modelling
  • Annual reports each year
  • Final version of case in month 48
structure of the science case
Structure of the Science Case
  • Executive Summary
  • Introduction to EISCAT_3D
  • The Science Case:
    • Atmospheric physics and global change
    • Space and plasma physics
    • Solar system science
    • Space weather and service applications
    • Radar techniques, coding and analysis
structure of the atmospheric section
Structure of the Atmospheric Section
  • Background
  • Dynamical coupling in the atmosphere
  • Solar-terrestrial effects on atmospheric chemistry
  • Dynamical and chemical coupling in the mesosphere
  • Atmospheric turbulence in the stratosphere and troposphere
  • Short and long-term change in the upper atmosphere
dynamical coupling in the atmosphere topics covered
Dynamical Coupling in the Atmosphere:Topics Covered
  • Rossby and gravity waves, winds, tides
  • Wave breaking and dissipation
  • Effects on large-scale circulation
  • Consequences for composition and transport
dynamical coupling in the atmosphere key science questions
Dynamical Coupling in the Atmosphere:Key Science Questions
  • What is the three-dimensional structure of the wave fields propagating upwards from the troposphere? How do their characteristics change as they move upwards to thermospheric heights?
  • How does atmospheric turbulence form and evolve? How is this process different in the different atmospheric layers?
  • What is the relationship between changes in chemistry and changes in dynamics?
  • How do waves and turbulence interact to modify the global-scale circulation of the middle atmosphere? What effects are seen when the normal circulation is disrupted?
  • What is the relationship between the waves generated in the upper atmosphere and the processes which cause them?
solar terrestrial effects on chemistry topics covered
Solar-terrestrial effects on chemistry:Topics covered
  • Energetic particles and HOx/NOx
  • Modulation of ozone density
  • Links to dynamics
  • Links to surface temperature anomalies
  • D-region chemistry
  • Active experiments on the D-region
solar terrestrial effects on chemistry key science questions
Solar-terrestrial effects on chemistry:Key Science Questions
  • What are the durations and extents of the energetic particle events which modulate chemistry?
  • How does the wave and tidal climatology change when the heat balance of the middle atmosphere is modulated, for example by changes in chemistry?
  • What processes link these changes to apparent effects at lower altitudes?
  • Can high-resolution continuous observations help validate chemical/dynamical models of the D-region?
  • Can we improve our models through targeted active experiments?
dynamical and chemical coupling in the mesosphere topics covered
Dynamical and Chemical Coupling in the MesosphereTopics Covered
  • Chemistry and turbulence in mesospheric thin layers
  • Structure and aspect sensitivity in PMSE
  • PMWE: turbulence or dust?
  • Long-term trends
  • Other kinds of D-region fine structure (plasma instabilities)
dynamical and chemical coupling in the mesosphere key science questions
Dynamical and Chemical Coupling in the MesosphereKey Science Questions
  • How much small-scale structure is contained in mesospheric thin layers? Is this linked to wave activity, or plasma physics, or both?
  • What explains the aspect sensitivity of PMSE and PMWE layers?
  • What is the horizontal and vertical structure of the dust size in PMSE layers, and how does this vary?
  • Are PMWE layers linked to both dust and turbulence, or only to turbulence? How do they form, and what determines when they appear?
  • Are mesospheric thin layers signs of global change, connected to human activity?
stratosphere and troposphere topics covered
Stratosphere and Troposphere:Topics Covered
  • Changes in wave propagation
  • Stratospheric warmings
  • Turbulence and wave dissipation
  • Stratosphere/ troposphere exchange processes
  • Atmospheric vorticity
stratosphere and troposphere key science questions
Stratosphere and Troposphere:Key Science Questions
  • How does turbulence in the troposhere and stratosphere form and develop?
  • What are the effects of turbulence and wave dissipation on energy exchange between atmospheric layers?
  • How do stratospheric warming events affect the atmosphere at other heights, and at other latitudes?
  • Can the upper atmosphere exert a downward control on the troposphere, and if so how?
short and long term change topics covered
Short and long-term change:Topics Covered
  • Long-term cooling and contraction of the thermosphere
  • Long-term change in the mesosphere
  • Understanding shorter-term variations
  • Effects on satellite drag
  • Problems with models and predictability
short and long term change key science questions
Short and long-term change:Key Science Questions
  • How does long-term change in the troposphere affect its energy exchange with the other atmospheric layers?
  • Is greenhouse warming of the lower atmosphere resulting in long-term cooling of the upper atmosphere? If so, what effect is this having?
  • What are the problems with our current models of the upper atmosphere, and what implications might these have for predictability?
  • Can we use EISCAT_3D data as a basis to make improved predictions of shorter-term variations in the Earth’s upper atmosphere, such as those connected to the solar cycle?
what happens next
What happens next?
  • Last meeting with this version of the panel
  • Good discussions yesterday – some work needed to accommodate the changes
  • Continue to work on atmospheric section by email
  • Need to work more on the key science questions
  • Close to final version of atmospheric case by the time of the July submission
things to think about
Things to think about......
  • Are the section headings correct?
  • Are there major areas missing?
  • Are the key science questions appropriate?
  • Are there important questions missing?
  • Have the questions been answered already?
  • Can EISCAT_3D really make a contribution?