Task 4

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*[[Media:TG4_newsletter_issue12.pdf‎|12th TG4 Newsletter, July 2013]]
*[[Media:TG4_newsletter_issue11.pdf‎|11th TG4 Newsletter, April 2013]]
*[[Media:TG4_newsletter_issue11.pdf‎|11th TG4 Newsletter, April 2013]]
*[[Media:TG4_newsletter_issue10.pdf|10th TG4 Newsletter, November 2012]]
*[[Media:TG4_newsletter_issue10.pdf|10th TG4 Newsletter, November 2012]]

Revision as of 13:30, 13 November 2013

Contents

What is the geospace response to variable inputs from the lower atmosphere?

Organizational Structure

Task Group leaders: Jens Oberheide (Germany), Kazuo Shiokawa (Japan)

Project 1: How do atmospheric waves connect tropospheric weather with ITM variability? (ITM=Ionosphere-Thermosphere-Mesosphere)

  • Project leaders: Mangalathayil A. Abdu. (Brazil) / Jorge Chau (Peru) / William Ward (Canada)
  • Project members: U. Achatz (Germany), J. Alexander (USA), A. Arulia (UK), I. Batista (Brazil), A. Baumgaertner (Germany), E. Becker (Germany), S. Bruinsma (France), B. Clemesha (Brazil), G. Didebulidze (Georgia), J. Forbes (USA), S. England (USA), B. Funke (Spain), D. Fritts (USA), N. Gavrilov (Russia), L. Goncharenko (USA), S. Gurubaran (India), M. Hagan (USA), C. Hall (Norway), P. Hoffmann (Germany), T. Immel (USA), E. Kherani (Brazil), S. Kirkwood (Sweden), P. Koucka Knizova (Czech Republic), T. Li (China), R. Lieberman (USA), C. Lin (Taiwan), G. Liu (USA), H. Liu (Japan), H.-L. Liu (USA), L. Liu (China), M. Lopez-Puertas (Spain), H. Lühr (Germany), A. Manson (Canada), C. Marques Brum (Puerto Rico), C. Martinis (USA), D. Murphy (Australia), T. Nakamura (Japan), D. Pallamraju (India), S. Palo (USA), A. Patra (India), B. Rabiu (Nigeria), T. Ramkumar (India), K. Sato (Japan), M. Shepherd (Canada), L. Scherliess (USA), H. Shinagawa (Japan), E. Talaat (USA), M. Taylor (USA), T. Tsuda (Japan), S. Vadas (USA), W. Wan (China)

Project 2: What is the relation between atmospheric waves and ionospheric instabilities?

  • Project leaders: Jon Makela (USA) / Hisao Takahashi (Brazil)
  • Project members: I. Batista (Brazil), A. Bhattacharya (India), R. Buriti (Brazil), J. Chau (Peru), D. Fritts (USA), N. Gavrilov (Russia), E. Becker (Germany), L. Goncharenko (USA), J. Guoying (China), C. Haldoupis (Greece), D. Hysell (USA), P. Koucka Knizova (Czech Republic), C. La Hoz (Norway), M. Larsen (USA), H. Lühr (Germany), L.-A. McKinnell (South Africa), A. Manson (Canada), C. Martinis (USA), T. Maruyama (Japan), Y. Otsuka (Japan), D. Pallamraju (India), A. Patra (India), B. Rabiu (Nigeria), T. Ramkumar (India), M. Rietveld (Norway), S. Shamilov (Russia), E. Shume (Brazil), M. Taylor (USA), T. Tsuda (Japan), S. Vadas (USA)

Project 3: How do the different types of waves interact as they propagate through the stratosphere to the ionosphere?

  • Project leaders: Dora Pancheva (Bulgaria) / Mamoru Yamamoto (Japan)
  • Project members: U. Achatz (Germany), A. Baumgaertner (Germany), E. Becker (Germany), J. Chau (Peru), B. Clemesha (Brazil), D. Fritts (USA), N. Gavrilov (Russia), L. Goncharenko (USA), J. Guoying (China), S. Gurubaran (India), A. Hertzog (France), P. Hoffmann (Germany), C. Jacobi (Germany), T. Li (China), R. Lieberman (USA), H. Liu (Japan), H.-L. Liu (USA), L. Liu (China), A. Manson (Canada), N. Mitchell (UK), P. Mukhtarov (Bulgaria), D. Murphy (Australia), S. Nozawa (Japan), S. Palo (USA), P. Preusse (Germany), T. Ramkumar (India), M. Rapp (Germany), K. Sato (Japan), C. v. Savigny (Germany), M. Shepherd (Canada), W. Singer (Germany), A. Smith (USA), M. Taylor (USA), T. Tsuda (Japan), B. Vincent (Australia), W. Wan (China), J. Xu (China)

Project 4: How do thermospheric disturbances generated by auroral processes interact with the neutral and ionized atmosphere?

  • Project leaders: Hitoshi Fujiwara (Japan) / Mike Kosch (UK)
  • Project members: A. Arulia (UK), N. Balan (UK), S. Bruinsma (France), M. Conde (USA), A. Coster (USA), M. Danielides (USA), Y. Deng (USA), P. Dyson (Australia), L. Goncharenko (USA), S. Kirkwood (Sweden), G. Lehmacher (USA), R. Liu (China), W. Singer (Germany), T. Liu (Taiwan), G. Lu (USA), A. Manson (Canada), M. Nicholls (USA), S. Oyama (Japan), A. Richmond (USA), Y. Sahai (Brazil), E. Talaat (USA), M. Taylor (USA), T. Tsugawa (Japan), Q. Wu (USA), H. Yang (China)

Project 5: How do thunderstorm activities interact with the atmosphere, ionosphere and magnetosphere?

  • Project leaders: Yukihiro Takahashi (Japan) / Colin Price (Israel) / Earl Williams (USA)
  • Project members (tentative): Mitsuteru Sato (Japan), Toru Adachi (Japan), Hiroyo Ohya (Japan), Fuminori Tsuchiya (Japan), Gabriella Satori (Hungary), Umran Inan (USA), Walter Lyons (USA), Steven Cummer (USA), Victor Pasko (USA), Torsten Neubert (Denmark), Elisabeth Blanc (France), Thomas Farges (France), Ute Evert (Netherland), Yoav Yair (Israel), Michi Nishioka (Japan), Masashi Kamogawa (Japan), Yasutaka Hiraki (Japan), Carl-Fredrik Enell (Finland), Alfred Chen (Taiwan), David Smith (USA), Michel Rycroft (UK), Martin Fullekurg (UK), Fernando Saosabbas (Brazil), Enrico A (University of Bologna)

In addition, Task Group 4 has a joint project with Task Group 2 (lead TG2):

Project 6: How does climate change affects atmospheric waves in the ITM?

  • Project leaders: TBD (2)
  • Project members: TBD

Introduction

Figure 1. Persistent tropical weather systems can cause global wave structures throughout the ITM system.

A variety of new evidence suggests that tropospheric weather is an important ingredient in geospace variability. Gravity waves generated by hurricanes or typhoons may propagate into the thermosphere and seed ionospheric instabilities, i.e., plasma bubbles, sporadic-E patches and traveling ionospheric disturbances. Atmospheric tides due to persistent tropical rainstorms produce large longitudinal and local time variations in bulk ionosphere-thermosphere-mesosphere (ITM) properties, i.e., temperature, wind, composition, airglow and plasma density, to name a few.

Oscillations of F-region plasma density and other ITM properties at planetary wave periods at least partly reflect the planetary wave activity and variability in the stratosphere. Thermospheric waves generated by high-latitude auroral energy input change the ionospheric and thermospheric environments even at low latitudes. All these waves may further interact with each other and the background atmosphere, i.e., when propagating upward through the stratosphere to the ionosphere, hence producing additional variability and/or secondary waves.

Studying the geospace response to variable inputs and waves from the lower atmosphere is particularly important since the induced variability competes with the solar and magnetic driving from above. Consequences for telecommunications, re-entry and satellite operations still need to be explored. The extent to which the effects of this quiescent atmospheric variability are transmitted to the magnetosphere is yet to be resolved.

The challenge

We thus stand right now at an exciting research frontier: understanding the cause-and-effect chain that connects tropospheric (weather!) and strato-/mesospheric variability with geospace processes. Task Group 4 will therefore elucidate the dynamical coupling from the low and middle atmosphere to the geospace including the upper atmosphere, ionosphere, and magnetosphere, for various frequencies and scales, such as gravity waves, tides, and planetary waves, and for equatorial, middle, and high latitudes. Attacking the problem clearly requires a systems approach involving experimentalists, data analysts and modelers from different communities. For that purpose, the most essential part of Task Group 4 is to encourage interactions between atmospheric scientists and plasma scientists on all occasions.

The scientific issues

The past few years have seen the development of basic ideas about the processes involved, including wave forcing, wave propagation and the neutral-electrodynamical coupling. Satellite and ground-based data sets to attack the problem are now of sufficient length and quality with even more becoming available soon. Mechanistic and first principle modeling results are encouraging and further improvements can be expected. The following list of the scientific issues addressed by Task Group 4 gives a brief summary of what we know and what we do not know so far for (a) gravity waves, (b) tides, (c) planetary waves, and (d) thermospheric waves generated by auroral processes.

Gravity waves

Figure 2. Gravity wave (GW) propagation and release of momentum flux in the thermosphere.
Figure 3. Gravity wave seeding of ionospheric (Rayleigh-Taylor type) instability.

What we know: Gravity waves from convection and jets in the lower atmosphere propagate into the mesosphere, dissipate their energy near the mesopause region, and/or penetrate into the thermosphere.

  • Basic knowledge about gravity wave forcing and propagation in the MLT region,
  • Theory about penetration of gravity waves into the thermosphere, and
  • Speculation about initiation of various ionospheric plasma instabilities by gravity waves.

What we do not know:

  • Evidence of gravity wave seeding of ionospheric instabilities, such as
    • MSTIDs: wavelength/propagation
    • plasma bubbles: day-to-day variability, zonal separation
    • sporadic-E patches: scale size and propagation
  • How important is gravity wave forcing in the thermosphere/ionosphere dynamics?

Tides

Figure 4. Coupling from the troposphere to the ionosphere through tides.

What we know: Nonmigrating (non Sun-synchronous) tides due to deep tropical convection produce large longitudinal and local time variations in bulk ITM properties.

  • Temperature, wind, composition, plasma density, electron density perturbations
  • 4-peaked longitudinal variations observed by satellites are the DE3 nonmigrating tide
  • Basic quantitative knowledge of tidal forcing, propagation and morphology in the MLT region
  • Basic qualitative knowledge of coupling into the F-region: E-region dynamo modulation,

due to satellite observations and model simulations since ~2006. Important contributions came from CAWSES-I.

What we do not know:

  • What are the tidal structures in the ionosphere-thermoshere (IT), i.e., between 120 km (TIMED) and 400 km (CHAMP, GRACE)?
  • What are the temporal variations: days, inter-annual, QBO, solar cycle?
  • How much of the tropospheric influence is due to direct tidal upward propagation into the F-region and how much is due to E-region dynamo modulation?
  • How important are tides forced by non-linear interactions in the stratospher and/or mesosphere? (for the IT)
  • We know little about the coupling between the various waves (tides, GWs, PWs) and mean motions in the IT.
  • There is no good understanding of the tidal effects on energy balance, composition, etc…

Planetary waves

Much of the above about tides also applies to the planetary waves. Some specific questions are

  • Stratwarm effects on the ionosphere and thermosphere.
  • PW signatures in parameters of aeronomic interest, i.e., in O/N2 ratio, nitric oxide, dynamical fields, plasma density?, …
  • Wave-wave interactions, interhemispheric coupling.

Thermospheric disturbances generated by auroral processes

Figure 5. Cause and effects of thermospheric waves and disturbances generated by auroral processes.

What we know: Traveling atmospheric disturbance (TADs) and gravity waves are generated in the high latitude ionosphere due to energy input from the magnetosphere. Related to these aurorally-generated neutral waves, we know

  • They are reproduced on global scale by GCM
  • We have large-scale views by global GPS-TEC map at middle and low latitudes
  • We also have small-scale view by IS radars/SuperDARN radars in the auroral zone

What we do not know:

  • How do storm-time neutral waves affect the formation of the equatorial ionization anomaly?
  • How is the unusual vertical wind formed in the vicinity of aurora?
  • Do thermospheric winds driven by high-latitude ionospheric plasma convection cause feedback to the plasma convection?
  • How does the composition change (decrease of O/N2 ratio) of the thermosphere occur and propagate on global scale to cause negative ionospheric storm

Meeting the challenge

Task Group 4 has defined four projects to attack the overarching science questions. This is by no means an exclusive list. Suggestions for new projects are welcome at any time!

Project 1: How do atmospheric waves connect tropospheric weather with ITM variability? (ITM=Ionosphere-Thermosphere-Mesosphere)

  • Project leaders: Mangalathayil A. Abdu. (Brazil) / Jorge Chau (Peru) / William Ward (Canada)
  • Project members: see Organizational Structure
  • CAWSES-I Tidal Campaign will be continued here (with contributions to the other projects)

Project 2: What is the relation between atmospheric waves and ionospheric instabilities?

Project 3: How do the different types of waves interact as they propagate through the stratosphere to the ionosphere?

Project 4: How do thermospheric disturbances generated by auroral processes interact with the neutral and ionized atmosphere?

Project 5: How do thunderstorm activities interact with the atmosphere, ionosphere and magnetosphere?

  • Project leaders: Yukihiro Takahashi (Japan) / Colin Price (Israel) / Earl Williams (USA)
  • Project members: see Organizational Structure

In addition, Task Group 4 has a joint project with Task Group 2 (lead TG2):

Project 6: How does climate change affects atmospheric waves in the ITM?

  • Project leaders: TBD (2)
  • Project members: TBD

Notes:

  • All projects are requested to make reports and workshops every 1-2 years in conferences.
  • Task Group 4 will organize well focussd sessions at major conferences.
  • It is planned to have focused conferences of Task 4 (like PSMOS-DYSMER) every 2 years. Alternatively, there may be multiple-day session at the SCOSTEP STP conferences.
  • It is crucial that the different projects interact with each other.

Outcomes and benefits - success criteria

Task Group 4 aims to get significant process understanding, and, to obtain closure towards a better quantitative understanding of the posted science challenge questions. The most important scientific needs towards this ambitious goal are:

Gravity waves

  • Penetration of GWs into the thermosphere and ionosphere
  • Relation between gravity waves and various ionospheric instabilities
    • MSTIDs, plasma bubbles, and E-region patches
  • Gravity wave forcing in the thermosphere/ionosphere dynamics?

Tides and planetary waves

  • What are the tidal structures and variability in the ionosphere and thermosphere?
  • E-region dynamo altitudes, longitudinal and temporal
  • How do they affect the thermosphere/exosphere?
    • Density, composition, energy balance, ...
  • Understand the cause-and-effect chain that couples tropical convection with the F-region (tides)
  • Quantitative, first principle modeling; data analysis
  • What is the role of tides/GW/PW in plasma bubble seeding?
  • Longitudinal and temporal modulation of GW propagation and/or GW-tidal interactions?
  • How does climate change affect the tides? (closely related to Task 2)

Thermospheric disturbances and storm-time winds generated by auroral processes

  • Ionospheric plasma dynamics at middle and equatorial latitudes by (1) neutral winds from bottom and (2) electric fields from above.
    • Which is important for what cases?
  • Coupling between thermospheric winds and plasma convection in the high-latitude ionosphere
  • Composition change (O/N2 ratio) of the thermosphere. How does it occur and propagate on global scale to cause ionospheric disturbance?

The anticipated better process and quantitative understanding of the underlying physics will allow to assess the relative importance of the lower atmospheric waves to space weather and solar and magnetic driving from above. It will further provide the scientific fundament to explore consequences for key elements of today's technological society, i.e., telecommunications, GPS positioning, and satellite operations.

Existing work and plans

CAWSES Tidal Campaigns

The “CAWSES Tidal Campaign” efforts from CAWSES-I continue (lead: Prof. Dr. William Ward, University of New Brunswick, Canada), as part of Task Group 4. Formally assigned to project 1, it makes contributions to projects 1-3. See the campaign webpage for further details. The first Tidal Campaign of CAWSES-II is scheduled for August-September 2011, lead by William Ward. For details see the 4th TG4 Newsletter.

CAWSES India

Provided by D. Pallamraju: With regard to CAWSES-II, I would like to share that the CAWSES-India phase II has also been approved by the Indian Space Research Organization (ISRO) and several research proposals are currently under review. With regard to the Science being pursued, there is a great interest in India in the investigations of the wave phenomena, wave properties and propagations, etc. Especially, plans are underway for investigations during the forthcoming annular solar eclipse, the path of which passes over the dip equator in India. As this would pass over some parts of China as well, focussed investigations can be carried out, especially on the modification of the equatorial dynamics and the modification of the waves thereof. This would be directly relevant to the science being pursued under TG-4. Furhter, there would be a total solar eclipse in the SH on July 11, 2010. In addition to the general observations/investigations, we should probably plan to use these such events to carry out Regional observational campaigns to investigate the (modifications in the) coupling processes in the atmospheres.

ISR campaigns and related activities

Provided by L. Goncharenko: We are planning to have a campaign with incoherent scatter radars this winter as well. This will be ""alert mode"" experiment, i.e. we will be watching stratospheric conditions and issue the alert if stratwarming is predicted. The window is scheduled for Jan 15 - Feb 15, 2010, with 10-days operations. As stratwarming events include many interactions related to Task Group 4 interests, this could be interesting for many people involved in Task Group 4. As many of you operate other types of instruments, I would like to invite you to join in this research opportunity. Please let me know if you want to be informed when experiment begins. So far, planetary wave activity in the stratosphere is very high this winter, with wave 1 approaching all-time highs. We hope it leads to a significant event in the stratosphere.

Provided by A. Arulia: We would also request that Dr Goncharenko keep us informed of the stratospheric warming experiment as we plan to be running EISCAT-FPI experiments in February 2010. The link between space weather and tropospheric weather is of great interest to us. We also run the CMAT-2 model which covers the stratosphere-mesosphere-thermosphere-ionosphere-plasmasphere.

SpreadFEx2 and SAANGRIA

Provided by D. Fritts: (1) a Spread F Experiment 2 (SpreadFEx2) that began in September 2009 and will continue through ~November 2010, including a large suite of instruments in Brazil and Peru, for which I am the coordinator, but there are many international participants in Brazil and the U.S. This would likely fit well in topics 1 and 2. (2) a proposed SAANGRIA (for Southern Andes - ANtarctic peninsula GRavity wave InitiAtive) which is now being proposed as a large airborne and ground-based experiment, with extensive modeling support) employing the NCAR HIAPER research aircraft, and possibly other airborne platforms, for a study of mountain waves from their sources to their dissipation altitudes as high as the MLT. This experiment is now planned for late June to early September 2012. This would seem to contribute most to topics 1 and 3.


A lot of facilities are available related to the Task Group 4 activities, as below.

Instruments and Facilities in Africa

Provided by B. Rabiu: At moment, in Africa, we have 13 GPS facilities (Boston College and AFRL, US) and 13 Magnetometers (MAGDAS, SERC, Kyushu University, Japan) which can be engaged in developing meaning proposal to fit into CAWSES objectives.

Radars

  • ESRAD in Kiruna (50 MHz), continuously operating since 1996; MARA in Queen Maud Land (Antarctica) which operates during summer campaigns. Contact: S. Kirkwood (Sweden)
  • AMISR –Antarctica, Resolute Bay, Jicamarca, Poker Flat
  • PANSY (IS radar in Antarctica) was just approved in Japan.
  • EISCAT 3D: phased array antennas, imaging capability, under proposal
  • German new type of radar for turbulence and winds in Andoya.
  • SuperDARN radars: toward midlatitudes
    • US: 6-7 new radars will be installed over next 3 years at Kansas, Azores up to Aleutian islands.
    • Russia: four SuperDARN radars will be developed in a next few years
    • Australia: Adelaide midlatitude site (part of TIGER network)
    • Japan: Second Hokkaido radar is proposed for 2010 construction.

Optical instruments

  • FPI at Esrange, Sodankyla, and Longyearbyen (all near EISCAT radars). Red and green line observations. Plans to observe hydroxyl in upper mesosphere. Operation is during nighttime from Sep-April, full 24 hour coverage Dec-Jan in Longyearbyen. Contact: A. Arulia
  • OMTIs – airglow imager/interferometer array – extension to lower latitudes
  • US Fabry Perot Interferometer – US/Brazil
  • Space –borne lidar – next steps?

Satellites

  • TIMED - NASA satellite, MLT and thermosphere data, since 2001
  • C/NOFS - U.S. Air Force satellite, ionospheric data, since 2008
  • ESA – SWARM satellite constellation – 3 CHAMP equivalent satellites (anticipated launch 2012)
  • ISS – IMAP: launch 2012 (Japanese airglow imager on International Space Station)
  • e-POP (Canada): launch 2009, ionospheric outflow
  • Chibis (Russia): launch November 2011, TLEs, TGFs. See Chibis microsatellite information and contact.

Magnetometers

  • MAGDAS – Japan, magnetometer chains on global scale including Africa
  • Chinese Meridian Project

VLF receivers

  • AWESOME – VLF receivers network

Key linkages

  • Priority program “CAWSES” of the German DFG (lead: Prof. Dr. F.-J. Luebken, IAP Kuehlungsborn, Germany), funded until 2011.
  • CAWSES India, other national CAWSES projects...
  • Cross-task project with Task Group 2 (project 6 above)
  • ISSI team 152 (lead: Dr. Peter Hoffmann, IAP Kuehlungsborn, Germany) addressing vertical coupling processes using EISCAT and CAWSES tidal campaign data.
  • ISSI (International Space Science Institute, Bern, Switzerland) plans a workshop and subsequent review book publication for a topic of The Energetic and Momentum Coupling between the Earth's Atmospheric and Plasma Environments.
  • COSPAR, IAGA, AOGS, CEDAR ….

Milestones

News, progress reports and business meetings

TG4 Workshops and Meetings

Title Date Location CAWSES-II financial support TG4 Newsletter report
Wave-4 workshop: from bottom to top, bridging views from the two ends 22-23 February 2010 Kyoto, Japan no Vol. 1
CAWSES-II MLT Radar Workshop 8-9 March 2010 Singapore yes Vol. 2
Coupling between the Earth's atmosphere and its plasma environment 27 Sep - 1 Oct 2010 Bern, Switzerland no Vol. 3
4th IAGA/ICMA/CAWSES II TG 4 Workshop on Vertical Coupling in the Atmosphere-Ionosphere System 14-18 February 2011 Prague, Czech Republic yes Vol. 4
Workshop on the Spread F Experiment-2 (SpreadFEx-2): Measurement, Modeling and Collaborative Analyses 10-11 August 2011 Sao Jose dos Campos, Brazil no Vol. 5
10th Layered Phenomenon of the Mesopause Region Workshop (LPMR-10) 24-27 October 2011 Blacksburg, VA, USA yes coming soon
13th International Symposium on Equatorial Aeronomy (ISEA-13) 12-16 March 2012 Paracas, Peru yes spring 2012
COSPAR, Session C2.2: Whole Atmosphere Wave Coupling and Interaction Processes 14-22 July 2012 Msyore, India no tbd
International CAWSES Symposium 18-22 November 2013 Nagoya, Japan yes tbd

Latest News/Newsletter

  • Date: July, 10, 2013
  1. 12th TG4 Newsletter issued: download
  • Date: April, 1, 2013
  1. 11th TG4 Newsletter issued: download
  • Date: November 1, 2012
  1. 10th TG4 Newsletter issued: download
  • Date: July 6, 2012
  1. 9th TG4 Newsletter issued: download
  • Date: April 3, 2012
  1. 8th TG4 Newsletter issued: download
  2. The TG4 Business Meeting at COSPAR will be held 20 July 2012, 19:00-20:30 (after session C2.2). Please see newsletter #8 for more information.
  • Date: January 16, 2012
  1. Seventh TG4 Newsletter issued: download
  2. A TG4 Business Meeting will be held during the COSPAR meeting. Time and location will be announced before the conference via TG4 email. All TG4 members and interested colleagues are invited to attend.
  • Date: October 24, 2011
  1. Sixth TG4 Newsletter issued: download
  • Date: July 6, 2011
  1. TG4 Business Meeting at IUGG, 18:10-20:10, Room MR106 at Melbourne Convention and Exhibition Centre. We will try to finish by 19:20 for attendees of the IAGA dinner. Some catering (tea, biscuits) will be arranged. For agenda details see the 5th TG4 Newsletter. See notes below.
  • Date: June 22, 2011
  1. Fifth TG4 Newsletter issued: download
  • Date: March 26, 2011
  1. The first Tidal Campaign of CAWSES-II is scheduled for August-September 2011, lead by William Ward. For details see the 4th TG4 Newsletter.
  2. Fourth TG4 Newsletter issued: download
  • Date: January 12, 2011
  1. Third TG4 Newsletter issued: download
  • Date: 14 - 18 February 2011
  1. The 4th IAGA/ICMA/CAWSES-II TG4 Workshop on Vertical Coupling in the Atmosphere-Ionosphere System will be held from Feb 14-Feb 18, 2011 in Prague in Hotel Globus.
  • Date: September 24, 2010
  1. Second TG4 Newsletter issued: download
  • Date: July 22, 2010
  1. New TG4 project How do thunderstorm activities interact with the atmosphere, ionosphere and magnetosphere? by Yukihiro Takahashi (Japan), Colin Price (Israel) and Earl Williams (USA)
  2. TG4 business meeting at COSPAR in Bremen, 19:00-21:00, room: Arena Foyer / Phobos, see notes below
  • Date: June 8, 2010
  1. First TG4 Newsletter issued: download
  • Date: January 6, 2010
  1. Regional CAWSES-II topical meeting at the Singapore branch of the University of Adelaide during 8-9 March 2010.
    1. Aim: Discuss results from a number of MF/meteor/VHF and ionospheric radars for studies of MLT dynamics in India, Indonesia, Thailand, China, Korea, Japan, Australia and the Pacific; Plan the coordination of these radars to establish a firm radar network in the Asia-Oceania region.
    2. Organizers and further information: Ian Reid, University of Adelaide; Toshitaka Tsuda, Kyoto University.
  • Date: December 31, 2009
  1. TG4 team members accepted.
  2. TG4 mailing lists available
  • Date: November 29, 2009
  1. TG4 team members are being contacted.
  2. Existing work and plans updated.
  • Date: August 29, 2009 at the IAGA meeting in Sopron, Hungary.
  1. Dave Fritts suggested a new TG4 project that involves coordinated GB and aircraft observations in South America. He's willing to take the lead and will send more info soon. The project was approved by the TG4 co-leaders. Welcome!
  2. As suggested by Dora Pancheva, TG4 will be included in the atmosphere-ionosphere coupling IAGA/ICMA workshop to be held in Prague, Czech Republic in February 2011.

Business meeting July 2012

  1. Update on general CAWSES-II issues: new leadership, Nagoya symposium,... - Shiokawa
  2. Update on general TG4 activities: workshop support, newsletter, wiki, CAWSES India,... - Oberheide, Gurubaran
  3. Update on projects - project leaders
  4. Future activities - community input for SCOSTEP's new plan after CAWSES-II, ...
  5. Open discusssion and other business
  6. Adjourn

Business meeting July 2011

  • Date: July 6, 2011; at IUGG in Melbourne, 18:20-19:10, room MR 106
  • Attendance: 22 colleagues, chaired by TG4 co-leader Kazuo Shiokawa

First, Kazuo Shiokawa briefly reviewed current status of the TG4 activity, including status of the campaigns, publications, newsletters, and mailing lists. Kazuo Shiokawa also reported the results of the SCOSTEP general council meeting held during IUGG where the new president, Nat Gopalswamy, and the new vice-president, Franz-Josef Luebken were elected. Then project leaders report succeeded by Ward (project 1, Tidal campaign from August-October this year), H. Takahashi (project 2, LONET planning this Sept-Oct, together with the tidal campaign), M. Yamamoto (project 3, ground beacon network and some meeting status), D. Pancheva (project 3, Prague meeting), K. Shiokawa for project 4 (ppt supplied by M. Kosch and H. Fujiwara for EISCAT/PFISR observation and status of global modeling efforts). Then F.-J. Luebken made some comments as a new vice-president of SCOSTEP, saying that discussion for SCOSTEP programs after CAWSES-II has now been started. For status report of Project 5 see here.

Business meeting July 2010

  • Date: July 22, 2010; at COSPAR in Bremen, 19:00-21:00, room: Arena Foyer / Phobos
  • Attendance: about 45 colleagues, including the TG4 co-leaders and project co-leaders
  • Agenda (Slides by Oberheide/Shiokawa)
  1. Brief Overview of Task Group 4 – Oberheide/Shiokawa
  2. Update of general TG4 activities since the last business meeting (workshop support, newsletter, wiki, mailing list) – Oberheide/Shiokawa
  3. Summary of the SCOSTEP/CAWSES-II meeting last week in Berlin - Oberheide/Shiokawa
  4. Project status – project leaders
  5. New projects – Yukihiro Takahashi (thunderstorms and geospace)
  6. Future activities, next business meeting, IAGA/ICMA/CAWSES-II/TG4 workshop in Feb 2011
  7. Other business
  8. Adjourn
  • Guidelines for CAWSES-II grants as provided by the CAWSES-II co-chairs.
  • Brief Summary of project status/plans
    • Project 1
      • Six campaigns (1-2 months each) and 2 workshops (1 week each) so far. More anticipated, focused on specific science questions.
      • Tidal campaign webpage will move to wiki.
      • Chapman conference on tides planned
      • Data from the campaigns should be accessible to the community for 10 years. How to ensure that?
      • Discussion about data facilities and data policy, of general interest for all projects.
    • Project 2
      • Longitudinal network campaign, September 1 - November 13, 2010 (73 days)
      • Discussion about data sampling format, distribution, data and publication policy
    • Project 3
      • Four topics for project 3
      • Research activities: (i) MF radar network (e.g., in Asia (I. Reid and T. Tsuda)), (ii) Meteor radar network, (iii) Observation campaign for stratospheric warmings (L. Goncharenko), (iv) tidal campaigns (W. Ward), (v) longitude network campaign (J. Makela, H. Takahashi, project 2), (vi) Network of airglow imagers and/or interferometers including ISS-IMAP (= airglow imager on the International Space Station, launch is scheduled in 2012), (vii) Satellite (TIMED, C/NOFS, etc.) observations, (viii) model studies
    • Project 4
      • 4 primary goals.
      • EFOLD campaign execute in the polar cap during February 2010.
      • TRISTATIC campaign executed in northern Scandinavia during Fenruary 2010.
    • Project 5
      • Approved on business meeting. Welcome!
  • Future activities
    • Dora Pancheva introduced the 4th IAGA/ICMA/CAWSES-II TG4 Workshop on Vertical Coupling in the Atmosphere-Ionosphere System, to be held in Prague, Czech Republic, February 2011. There will be a project 2 campaign discussion on the workshop.
    • There will be a CAWSES-II joint IAGA/ICMA/IAMAS session at the IUGG meeting in Melbourne 2011. One invited speaker per TG, this does not need to be one of the TG co-leaders!
    • Session C22 at COSPAR 2012 encourages TG4 participation.
  • Other business
    • None.

Progress report August 2009 - July 2010

  • Date: July 17, 2010
  • Report: Jens Oberheide and Kazuo Shiokawa at the SCOSTEP Bureau meeting in Berlin (just after the STP-12 symposium)
  1. October 2009; TG4/ISSI team 152 collaboration established. 152 (P. Hoffmann) focuses on vertical coupling during SSW events. Oberheide attended the ISSI workshop in Bern. Suggestion was to include ISSI activities into the project 3 science plan.
  2. December 2009; project team members assigned/accepted; TG4 mailing lists available (managed by STEL); project plans from projects 2 and 4 received
  3. March 2010; regional CAWSES-II topical meeting in Singapore (Iain Reid), TG4 supported request for financial support (approved)
  4. June 2010; 1st TG4 newsletter issued by STEL, Nagoya University (Kazuo Shiokawa; editor: Michi Nishioka); posted on TG4 wiki and distributed to TG4 community per email; planned to issue one every 3-4 months

Business meeting August 2009

  • Date: August 28, 2009; after the CAWSES-II business meeting at the IAGA meeting, from 7pm to 8 pm
  • Attendance: about 15 people, including 5 project co-leaders (Drs. Abdu, Pancheva, Takahashi, Makela, Fujiwara) and the 2 TG4 co-leaders
  1. Overview of TG4 objectives (Oberheide/Shiokawa)
  2. Projects, co-leaders, structure (Oberheide/Shiokawa)
  3. It was agreed to ask a colleague from South America to become a co-leader of project 1 (as a GW expert)
  4. Timelines
    1. Project plan (project co-leaders, end of 2009 or earlier if possible)
    2. Input to wiki (project co-leaders, as soon as possible)
    3. Send list of team members to project co-leaders for revision (Oberheide/Shiokawa, early September)
    4. Contact team members (Oberheide/Shiokawa, as soon as project co-leaders revisions are received)
    5. Contact additional co-leader for project 1 (Oberheide, early September)
  5. Jens Oberheide mentioned that the Global Observing Campaigns on Tides (led by William Ward) will continue. The next campaign will be in winter 2009/10 because of the predicted moderate El Nino.
  6. Hisao Takahashi and Jon Makela briefly overviewed a plan for project 2: Longitudinal network observation of mesosphere-ionosphere coupling

Progress report April 2009 - August 2009

  • Date: August 28, 2009
  • Report: Jens Oberheide and Kazuo Shiokawa at the CAWSES-II business meeting at the IAGA meeting in Sopron
  1. Initial "white paper" for wiki finished
  2. Project 5 (climate change effects on waves) was moved to TG2, but with strong TG2/TG4 interaction
  3. Project co-leaders have been contacted; 8 accepted (2 per project); need 1 more co-leader (GW expert) for project 1
  4. Initial draft of potential project team members drafted (needs revision by project co-leaders before contacting team members)
  5. TG4 business meeting at the IAGA meeting in Sopron, August 2009
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