IAMAS Symposia in Perugia

MS001: Overview of the Findings of the IPCC’s Fourth Assessment Report

Total abstracts submitted: 0

Abstracts waiting for acceptance: 0 - Accepted Abstracts: 0 - Rejected Abstracts: 0

Sponsoring Association: IAMAS

The Fourth Assessment Report (AR4) of the Intergovernmental Panel on Climate Change (IPCC) will be published in early 2007. This special half-day symposium will include invited overviews describing the findings of the three IPCC working groups. Among the topics that will be covered are trends and projections of atmospheric composition and forcing, trends and projected changes in climate and sea level, observed and expected impacts on the environment and society, capabilities for adapting and building resilience to changes, and the status of options for limiting emissions through changes in the sources of energy and through carbon sequestration. Contributed papers on the findings of particular IPCC chapters should be submitted to the symposium closest to their scientific subject

Convener

Designated:

Michael C. MacCracken,

President of IAMAS,

6308 Berkshire Drive, Bethesda MD 20814 USA; Tel.: +1-301-564-4255;

Fax: +1-301-564-4255;

mmaccrac@comcast.net

Paola Malanotte-Rizzoli,

Department of Earth,

Atmospheric and Planetary Sciences, Massachusetts Institute of Technology,

77 Massachusetts Avenue, 54-1416 Cambridge, MA 02139-4307, USA;

Tel: +1-617-253-2451;

Fax: +1-617-253-4464;

rizzoli@mit.edu

Accredited:

- IUGG - rizzoli@mit.org

Michael MacCracken - IAMAS - mmaccrac@comcast.net

Co-Convener

Designated:

Not assigned

MS002: Global Observing Systems, Past, Present and Future (ICCL)

Total abstracts submitted: 1

Abstracts waiting for acceptance: 1 - Accepted Abstracts: 0 - Rejected Abstracts: 0

Sponsoring Association: IAMAS

This symposium is for submitted contributions addressing the topic of the Union Symposium "U03 on Global Observing Systems, Past, Present and Future". It will concentrate on the societal benefits of Earth observations in the context of the many global programs contributing to the Global Earth Observing System of Systems (GEOSS), including the Global Climate, Terrestrial and Ocean Observing systems (GCOS, GTOS, GOOS) and the Integrated Global Observing Strategy (IGOS) Partnership. Presentations on any aspects of Earth System Observations, but particularly those clearly resulting in societal benefits, are welcome

Convener

Designated:

Keith Alverson,

Global Ocean Observing System, Section,

IOC/UNESCO, 1 rue Miollis, 75732 Paris Cedex 15, France:

Tel: +33 (0) 1 45 68 40 42;

Fax: +33 (0) 1 45 68 58 13;

e-mail: k.alverson@unesco.org

Co-Convener

Designated:

John Latham, Global Terrestrial Observing System, SDRN, Food and Agriculture Organization of the UN, (john.latham@fao.org)

David Goodrich, Global Climate Observing System, (gcosjpo@wmo.int)

MS003: Aerosols, Radiation and Clouds (IRC, ICCP, ICACGP)

Total abstracts submitted: 2

Abstracts waiting for acceptance: 2 - Accepted Abstracts: 0 - Rejected Abstracts: 0

Sponsoring Association: IAMAS

The general uncertainties related to aerosols, radiation and clouds remain among the largest problems in understanding global climate and estimating global change. This symposium invites papers reporting on recent advances in scientific understanding achieved through improved measurements (e.g satellite remote sensing), field studies, parameterizations and numerical modeling, and climate simulations. Key topics are expected to include: 1) aerosol physics and chemistry, 2) radiation effects and interactions, and 3) clouds and cloud physics.”

Convener

Designated:

Teruyuki (Terry) Nakajima,

Center for Climate System Research,

University of Tokyo,

5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8568, Japan,

Tel: +81-4-7136-4370,

Fax: +81-4-7136-4375;

teruyuki@ccsr.u-tokyo.ac.jp

George A. Isaac,

Cloud Physics and Severe Weather Section,

Environment Canada,

4905 Dufferin Street, Toronto, Ontario, M3H5T4, Canada;

Tel: 1 416 739-4605;

Fax: 1 416 739-4211;

george.isaac@ec.gc.ca

Guangyu Shi,

Institute of Atmospheric Physics (IAP),

Chinese Academy of Sciences,

Beijing 100029, China;

Tel: +86-10-6204-0674;

Fax: +86-10-6204-3526;

shigy@mail.iap.ac.cn

Frank Raes,

Institute for Environment and Sustainability,

Joint Research Center,

European Commission, 21020 Ispra, Italy;

frank.raes@jrc.it

Co-Convener

Designated:

Not assigned

MS004: Mineral Dust Cycle and its Impact on Clouds and Radiation (ICCP)

Total abstracts submitted: 2

Abstracts waiting for acceptance: 2 - Accepted Abstracts: 0 - Rejected Abstracts: 0

Sponsoring Association: IAMAS

This symposium solicits updates and new results in areas of mineral dust research, air quality, cloud and climate implications:

1) Dust sources and processes leading to dust suspension and removal;

2) In-situ measurements of dust physical and chemical properties (size, shape, concentration, vertical distribution, chemical composition, mineralogy);

3) Optical properties of dust particles and their effects on radiation;

4) Remote sensing of dust particles (passive and active remote sensing);

5) Mineral dust effects on aerosols, clouds, and precipitation;

6) Modeling of the dust cycle at meso and global scales;

7) Impacts of dust on air quality, human health, ecosystems and climate;

9) Dust trends from seasonal to paleoclimatic scales

Convener

Designated:

George Kallos,

University of Athens, School of Physics,

Atmospheric Modeling and Weather Forecasting Group,

University Campus, Bldg PHYS-V, 15784 Athens, Greece;

Tel. +30-210-7276923, 7276835, +30-6944-544325;

Fax. +30-210-8994739, 7276765,

kallos@mg.uoa.gr, gkallos@tellas.gr

Co-Convener

Designated:

Andrea Flossman,Université Blaise Pascal Laboratoire de Météorologie Physique, flossman@opgc.univ-bpclermont.fr

Charlie Zender, Department of Earth System Science, zender@uci.edu

Alcide Giorgio di Sarra, ENEA, CLIM-OSS, S. Maria di Galeria, Italy, disarra@casaccia.enea.it

MS005: Biological Ice Nucleators in the Atmosphere – at the Crossroads of Physics and Biology (IAMAS/ICCP)

Total abstracts submitted: 0

Abstracts waiting for acceptance: 0 - Accepted Abstracts: 0 - Rejected Abstracts: 0

Sponsoring Association: IAMAS

Biogenic ice nuclei are among the most active of the known ice nucleators, yet their contribution to atmospheric processes has not been clarified. However, techniques of detection improve, understanding of biological sources is growing, and observations and modelling of clouds identify the role of early ice nucleation in the formation of precipitation and in determining other cloud characteristics. Experts from the atmospheric and biological sciences will review knowledge and assess evidence about the nature, distribution and role of biogenic ice nuclei in the atmosphere, and discuss the future research directions

Convener

Designated:

Gabor Vali,

Dept. Atmospheric Science, University of Wyoming,

1000 E. Ivinson, Laramie, WY 82070, USA,

Tel:+307-766-3225,

fax: +307-766-2635;

vali@uwyo.edu

Co-Convener

Designated:

Cindy E. Morris, INRA, Plant Pathology Research Unit, morris@avignon.inra.fr

MS006: Ice Microphysics: Theory and Measurement (ICCP)

Total abstracts submitted: 0

Abstracts waiting for acceptance: 0 - Accepted Abstracts: 0 - Rejected Abstracts: 0

Sponsoring Association: IAMAS

Results of experimental and theoretical studies of ice initiation and its following transformation in clouds are expected on topics including: observation of first ice formation and secondary ice production, concentration of small ice particles, metamorphosis of ice particle shapes in clouds, mechanisms of growth of ice particles by deposition, aggregation and riming, laboratory and theoretical studies of ice growth, effect of dynamics and radiation on ice formation, ice nuclei measurements, of homogeneous and heterogeneous ice nucleation, parameterization of ice concentration in numerical models, explanation of ice particle size distribution, instrumentation for in-situ measurements, remote sensing of cloud ice particles, validation and accuracy of ice measurements

Convener

Designated:

Alexei Korolev,

Environment Canada,

Toronto, ON, M3H 5T4, Canada;

tel (+1)-416-739-5716; (+1)-416-739-4211; Alexei.Korolev@ec.gc.ca

Co-Convener

Designated:

Paul Field, National Center for Atmospheric Research, prfield@ucar.edu

MS007: Theoretical advances in atmospheric dynamics (ICDM)

Total abstracts submitted: 0

Abstracts waiting for acceptance: 0 - Accepted Abstracts: 0 - Rejected Abstracts: 0

Sponsoring Association: IAMAS

This session will focus on the application of geophysical fluid dynamics theory to the understanding of the atmospheric circulation, with an emphasis on synoptic to large scale atmospheric circulations, both in the troposphere and stratosphere. Contributions are encouraged on a range of topics including wave and cyclone growth and evolution, eddy-mean flow interactions and possible dynamical regimes arising from it, the dynamics of storm tracks and jet streams, the dynamics of the stratospheric polar vortex, and its interaction with the troposphere

Convener

Designated:

Eyal Heifetz,

Department of Geophysics and Planetary Science,

Tel Aviv University, Israel.

Tel: 972-3-6407048;

Fax: 972-3-6409282;

eyalh@cyclone.tau.ac.il

Co-Convener

Designated:

Nili Harnik, Department of Geophysics and Planetary Science, harnik@post.tau.ac.il

John Nielsen-Gammon, Dept. of Atmospheric Sciences, Texas A&M University, n-g@tamu.edu

MS008: Ensembles and Probabilistic Forecasting (ICDM)

Total abstracts submitted: 1

Abstracts waiting for acceptance: 1 - Accepted Abstracts: 0 - Rejected Abstracts: 0

Sponsoring Association: IAMAS

This symposium invites contributions on all aspects of ensemble and probabilistic forecasting at all lead times and will include the following 5 topics.

A) Probabilistic data-assimilation

B) Probabilistic short-range forecasting systems

C) Probabilistic medium-range forecasting systems

D) Probabilistic monthly, seasonal and climate prediction systems

E) Applications of probabilistic forecasts

Convener

Designated:

Craig Bishop,

7 Grace Hopper Ave, Monterey, CA 93943-5502, USA.

Tel: (831) 656 5715;

Fax: (831) 656-4769;

Craig.Bishop@nrlmry.navy.mil

Co-Convener

Designated:

Myles Allen,

Atmospheric, Oceanic and Planetary Physics,

University of Oxford, myles.allen@physics.ox.ac.uk

MS009: Dynamics and Predictability of Severe Weather Events (ICDM)

Total abstracts submitted: 0

Abstracts waiting for acceptance: 0 - Accepted Abstracts: 0 - Rejected Abstracts: 0

Sponsoring Association: IAMAS

This symposium invites papers on all aspects of severe weather events on synoptic scales and smaller, and their predictability. All studies that relate to the global programme THORPEX will be appropriate for this session. This includes dynamical processes and their predictability, observing systems, data assimilation and observing strategies, and societal and economic implications. This session will cover factors affecting the predictability of weather events on one-day to sub-seasonal time scales."

Convener

Designated:

Istvan Szunyogh,

Department of Atmospheric and Oceanic Science,

University of Maryland, College Park Maryland, USA

Tel.: (1)-301-405-4841;

Fax: (1)-301-314-9363,

szunyogh@ipst.umd.edu

Co-Convener

Designated:

Richard Swinbank, Met Office, richard.swinbank@metoffice.gov.uk

MS010: Dynamics of Convectively-Coupled Equatorial Waves and the Madden-Julian Oscillation (ICDM)

Total abstracts submitted: 0

Abstracts waiting for acceptance: 0 - Accepted Abstracts: 0 - Rejected Abstracts: 0

Sponsoring Association: IAMAS

This symposium invites contributions based on diagnostic, theoretical and modeling studies of convectively-coupled tropical disturbances on synoptic and intraseasonal time scales. The aim of the Symposium is to bring together scientists to exchange their knowledge and experience so as to improve understanding and promote interdisciplinary studies of the dynamics and predictability of equatorial waves. Topics of relevance include: Dynamics of Equatorial Waves, Organized Tropical Convection, Observations of Intraseasonal Variability, Coupled Ocean-Atmosphere Dynamics, Numerical Simulations of Equatorial Waves, Scale Interactions, The Role of the MJO in ENSO Variability, and Tropical-Extratropical Interactions

Convener

Designated:

George Kiladis,

Physical Sciences Division, NOAA/OAR Earth System Research Laboratory,

325 Broadway, R/PSD5 Boulder, CO 80305 USA;

Tel: (303) 497-3892,

Fax: (303) 497-5373,

george.kiladis@noaa.gov

Co-Convener

Designated:

Adam Scaife, Hadley Centre, Met Office,

adam.scaife@metoffice.gov.uk

MS011: The Dynamics of Eastern Tropical Oceans and Subtropical Highs (ICDM)

Total abstracts submitted: 0

Abstracts waiting for acceptance: 0 - Accepted Abstracts: 0 - Rejected Abstracts: 0

Sponsoring Association: IAMAS

There is considerable current interest in the dynamics of the eastern tropical oceans, particularly with regard to the processes that maintain sea surface temperature, and with dynamics of the subtropical highs, which are often related. The topic is interpreted broadly, and studies that relate to marine stratocumulus clouds, aerosol-stratocumulus interactions, coastal upwelling and ocean eddies, systematic GCM errors in the region, and the interaction between the tropics and mid-latitude will be relevant to this symposium

Convener

Designated:

Roberto Mechoso,

Department of Atmospheric Sciences,

University of California, Los Angeles(UCLA),

405 Hilgard Avenue, Los Angeles, CA 90095-1565 USA;

Tel: (310) 825-3057;

Fax: (310) 206-5219;

mechoso@atmos.ucla.edu

Co-Convener

Designated:

Richard Grotjahn, Dept. of L.A.W.R., Univ. of California, grotjahn@ucdavis.edu

Chris Fairall, NOAA Environmental Technology Laboratory, chris.fairall@noaa.gov

MS012: Impacts of Biosphere-Atmosphere Interaction on Atmospheric Composition from Synoptic to Annual and Decadal Timescales

Total abstracts submitted: 0

Abstracts waiting for acceptance: 0 - Accepted Abstracts: 0 - Rejected Abstracts: 0

Sponsoring Association: IAMAS

Changes in biosphere-atmosphere fluxes of climatically important trace gases can impact atmospheric composition and climate on micro-meteorological to global scales. Successful prediction of changing atmospheric composition and its impact on chemistry and climate will require an improved representation of the processes governing biosphere-atmosphere interaction in regional and global models, and an identification of the critical temporal and spatial process scales. This symposium will focus on processes responsible for biosphere-atmosphere exchange of climatically significant species (e.g., greenhouse gases and biogenic VOCs). We invite papers from experimentalists and modelers on atmospheric interaction with both land and ocean biospheres, focusing on a range of timescales up to multi-annual, and on regional to global spatial scales

Convener

Designated:

Dylan Jones,

Department of Physics, University of Toronto,

60 St. George Street, Toronto, Ontario, Canada M5S 1A7;

Phone: 416-978-4992;

Fax: 416-978-8905;

dbj@atmosp.physics.utoronto.ca

Co-Convener

Designated:

Parvadha Suntharalingam, Department of Earth and Planetary Science, Harvard University, pns@io.harvard.edu

MS013: Topographic Effects on Weather and Climate (ICDM)

Total abstracts submitted: 0

Abstracts waiting for acceptance: 0 - Accepted Abstracts: 0 - Rejected Abstracts: 0

Sponsoring Association: IAMAS

This Symposium invites contributions based on observational, (including diagnostic), theoretical and numerical studies of the effects of the Earth's topography on atmospheric circulation, weather, and climate. Topics of relevance include: boundary layer flow over hills, generation of waves and turbulence by flow over complex terrain, variability of dynamical fields over complex terrain, spatial and temporal distribution of mountain induced rainfall, mesoscale orographic impacts revealed by observations, vortex and cyclogenesis associated with orography and their weather impacts, mechanical and thermal forcing of large-scale orography and their regional and global climate effects

Convener

Designated:

Kenneth S. Gage,

Tropical Dynamics and Climate Group

Physical Sciences Division, NOAA/OAR Earth System Research Laboratory

325 Broadway, R/PSD5 Boulder, CO 80305 USA;

Tel: 303-497-3964;

FAX: 303-497-5373;

Kenneth.S.Gage@noaa.gov

Co-Convener

Designated:

Ronald B. Smith, Dept. of Geology and Geophysics, Yale University,

ronald.smith@yale.edu

Zhe-Min Tan, Department of Atmospheric Sciences Nanjing University, zmtan@netra.nju.edu.cn

MS014: Interactions of Land Cover and Climate (ICCL)

Total abstracts submitted: 2

Abstracts waiting for acceptance: 2 - Accepted Abstracts: 0 - Rejected Abstracts: 0

Sponsoring Association: IAMAS

Land cover both responds to the climate and affects the climate, and these interactions are a major focus of the IGBP core project Integrated Land Ecosystem Atmospheric Processes Study (iLEAPS). Changes in land cover are now recognized as a factor that has contributed to changes in climate on all scales from local to regional and even global. This symposium invites papers on the full range of topics relating to the interactions of changes in land cover and condition and in climate, including changes relating to deforestation, agriculture, and other development; feedbacks relating to albedo, roughness, carbon storage and fertilization, trace gas fluxes, and other biogeochemical cycles; and impacts relating to ecosystem shifts, melting of permafrost, and water resources and soil moisture

Convener

Designated:

Meinrat O. Andreae,

Max Planck Institute for Chemistry,

P.O. Box 3060, D-55020 Mainz, GERMANY;

Tel: +49-6131-305-420;

Fax: +49-6131-305-487;

andreae@mpch-mainz.mpg.de

Co-Convener

Designated:

Pavel Kabat, ALTERRA Green World Research, Wageningen University and Research Centre, Pavel.Kabat@wur.nl

MS015: Extreme Weather and Climate Events: Past Occurrences and Future Likelihoods (ICCL)

Total abstracts submitted: 1

Abstracts waiting for acceptance: 1 - Accepted Abstracts: 0 - Rejected Abstracts: 0

Sponsoring Association: IAMAS

The vulnerability of society to climate variability and change is likely to depend more on changes in the intensity and frequency of extreme weather and climate events than on changes in the mean climate. This is the case because extremes usually have strong impacts on society and a small change in the mean condition can cause a large change in the likelihood of an extreme. This symposium invites papers that document past occurrences and future projections of extreme weather and climate events, especially as a result of changes in the climate and other factors. Papers reporting on observed changes, comparisons with model-simulated changes, projections of future extremes, physical processes leading to extremes, and quantification of uncertainties are invited

Convener

Designated:

Amanda Lynch,

School of Geography and Environmental Science,

PO Box 11A (for courier, replace with "Building 11"),

Monash University, Clayton, Vic 3800, Australia;

Tel: +61 3 9905 8291;

Fax: +61 3 9905 2948

Amanda.Lynch@arts.monash.edu.au

Co-Convener

Designated:

Lisa Alexander, Bureau of Meteorology Research Centre, l.alexander@bom.gov.au

Xuebin Zhang, Meteorological Service of Canada, Xuebin.Zhang@ec.gc.ca

MS016: Downscaling to Local and Regional Scales (ICCL)

Total abstracts submitted: 0

Abstracts waiting for acceptance: 0 - Accepted Abstracts: 0 - Rejected Abstracts: 0

Sponsoring Association: IAMAS

This symposium invites papers on studies directed towards deriving fine-scale estimates of atmospheric and hydrologic conditions. Approaches based on both statistical and deterministic techniques, including especially fine-scale regional models, are invited. Topics to be covered will include techniques for downscaling and modeling, intercomparison projects, application of the approaches to particular regions and localities, and evaluation of the techniques and their transferability and uncertainties. Papers are also welcomed on the linking of regional atmospheric and climate models to models of other processes, including hydrologic and ecosystem models

Convener

Designated:

Filippo Giorgi,

Physics of Weather and Climate Section,

The Abdus Salam International Centre for Theoretical Physics,

P.O. BOX 586, (Strada Costiera 11 for courier mail), 34100 Trieste, Italy;

Tel: + 39 040 2240 425;

Fax: + 39 040 2240 449 (or + 39 040 224 163);

giorgi@ictp.it

Co-Convener

Designated:

Bruce Hewitson, Climate System Analysis Group, Department of Environmental & Geographical Science, University of Cape Town, hewitson@egs.uct.ac.za

MS017: Climate Sensitivity and Climate Feedbacks: Progress and Remaining Questions (ICCL)

Total abstracts submitted: 1

Abstracts waiting for acceptance: 1 - Accepted Abstracts: 0 - Rejected Abstracts: 0

Sponsoring Association: IAMAS

Human economic activity is an important driving force for evolution of the climate system. Understanding and predicting changes in the climate system is a scientific goal for avoiding unwanted and abrupt changes. So far, in spite of uncertainties of its estimation, the climate sensitivity, defined as a change in the global near-surface temperature due to doubling carbon dioxide, still serves as an informative measure of climate change. It is widely used for climate model intercomparison and for evaluation of the climate system feedbacks. This symposium will be devoted to papers that further advance our knowledge of climate feedbacks, address uncertainties in climate sensitivity and use it to predict future climates

Convener

Designated:

Natalia Andronova,

Research Scientist, University of Michigan,

UIUC Associate Adjunct Professor,

1541D Space Research Building,

2455 Hayward Street, Ann Arbor, MI 48109-2143, USA;

Tel: +1-734-763-5833;

Fax: +1-734-936-0503;

natand@umich.edu

Co-Convener

Designated:

Not assigned

MS018: The Role of the Stratosphere in the Climate System (ICMA, IRC, ICCL)

Total abstracts submitted: 0

Abstracts waiting for acceptance: 0 - Accepted Abstracts: 0 - Rejected Abstracts: 0

Sponsoring Association: IAMAS

Stratospheric processes play a significant role in the Earth's climate. The absorption of solar radiation in the stratosphere by ozone modulates the solar forcing of climate. The concentrations of some stratospheric gases, principally ozone, carbon dioxide and water vapor, determine significant radiative forcing terms, and there is two-way interaction between stratospheric and tropospheric dynamics. This session will discuss observations, theories and models of the role of the stratosphere in the climate changes that have been observed over the past several decades and those anticipated in the next century

Convener

Designated:

Marvin Geller,

Marine Sciences Research Center,

Stony Brook University,

Stony Brook, New York, USA;

tel: 1-631-632-8686;

marvin.geller@sunysb.edu

Co-Convener

Designated:

Lorenzo Polvani, Department of Applied Physics and Applied Mathematics, Columbia University, lmp@columbia.edu

MS019: Middle Atmosphere Science (ICMA)

Total abstracts submitted: 0

Abstracts waiting for acceptance: 0 - Accepted Abstracts: 0 - Rejected Abstracts: 0

Sponsoring Association: IAMAS

Papers related to any aspect of the dynamics, chemistry, or physics of the atmosphere from near the tropopause to the lower thermosphere are appropriate for this session. Observational, modeling and theoretical papers are all solicited. Particularly welcome are contributions relating to a number of recent satellite missions that have the potential to greatly increase our knowledge of the middle atmosphere, including TIMED, ENVISAT, EOS-AURA and COSMIC

Convener

Designated:

Kevin Hamilton,

International Pacific Research Center,

University of Hawaii,

Honolulu, Hawaii 96826, USA;

tel: 1-808-956-8327;

Fax: 1-808-956-9425;

kph@hawaii.edu

Co-Convener

Designated:

Elisa Manzini, Istituto Nazionale di Geofisica e Vulcanologia, manzini@bo.ingv.it

Didier Hauglustaine, Institut Pierre Simon Laplace (IPSL), Laboratoire des Sciences du Climat et de l'Environnement (LSCE), Unit Mixte de Recherche CEA-CNRS UMR 1572, didier.hauglustaine@cea.fr

Daniel Marsh, Atmospheric Chemistry Division, National Center for Atmospheric Research, marsh@ucar.edu

MS020: Solar Activity and its Influences on the Earth's Weather and Climate (IRC)

Total abstracts submitted: 0

Abstracts waiting for acceptance: 0 - Accepted Abstracts: 0 - Rejected Abstracts: 0

Sponsoring Association: IAMAS

There is increasingly strong evidence that there is a link between variations in solar activity and the terrestrial climate. Changes in the solar output are present in total solar irradiance but also in spectral irradiance (particularly in the UV), solar wind and high energy particles. These can influence the state of the terrestrial atmosphere by both direct and indirect means, potentially having an influence on weather and climate. This symposium invites papers on topics relating to the nature and consequences of changes in solar activity on the geosphere. It addresses issues of the SCOSTEP research program "Climate and Weather of the Sun-Earth System (CAWSES)" with its emphases on variations of the solar irradiance and its influence down to the troposphere.

Convener

Designated:

Werner Schmutz,

Director PMOD / WRC,

Dorfstrasse 33, Davos Dorf, CH-7260, Switzerland;

Tel: +41 (081) 417 5145;

Fax: +41 (081) 417 5100;

werner.schmutz@pmodwrc.ch

Co-Convener

Designated:

Joanna D. Haigh, Space and Atmospheric Physics, Blackett Laboratory, Imperial College London, j.haigh@imperial.ac.uk

MW001: The Definitions of Atmospheric Ice Particles

Total abstracts submitted: 0

Abstracts waiting for acceptance: 0 - Accepted Abstracts: 0 - Rejected Abstracts: 0

Sponsoring Association: IAMAS

The meteorological observer is presently given an unsatisfactory coding procedure leading to data records which have been of no use in physical and climatological understanding of ice particles falling from the atmosphere. This calls for an attempt to formulate better definitions of atmospheric ice particles which may include relevant physical properties such as size range, shape, density, fall behavior, surface properties, growth history, etc. Contributors to this Workshop are encouraged to provide not only measurement-based definitions but also pictures and suggestions for the characterization of meteorological conditions which led to their growth.

For further details authors are advised to consult the Perugia file on http://www.iamas.org

Convener

Designated:

George A. Isaac,

Cloud Physics and Severe Weather Section,

Environment Canada,

4905 Dufferin Street, Toronto, Ontario, M3H5T4, Canada;

Tel: (416) 739-4605;

Fax: (416) 739-4211;

george.isaac@ec.gc.ca

Roland List,

Department of Physics,

University of Toronto,

Toronto, M5S 1A7, Canada;

Tel: 416 9282982;

Fax: 416 978 8905;

list@atmosp.physics.utoronto.ca

John Hallett,

Atmospheric Physics,

Desert Research Institute,

2215 RAGGIO Parkway, Reno, NV 89512, USA,

Tel: +1-775-674-7013;

hallett@dri.edu

Accredited:

Roland List - IAMAS Department of Physics University of Toronto University of Toronto - list@atmosp.physics.utoronto.ca

Co-Convener

Designated:

Not assigned