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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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The eiscat 3d science case atmospheric section

The EISCAT_3D Science Case:Atmospheric Section

Ian McCrea

STFC RAL


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?


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