Atmospheric Physics at MISU

Department of Meteorology Stockholm University

the middleatmosphere(10-100 km)

Jörg GumbelJonas HedinMarkus Rapp

Atmospheric Physics at MISU

2 scientists

2 guest scientists

4 Ph.D. students

1 research engeneer

1 professor emeritus

december 2004

the mesosphere

noctilucent clouds (NLC)

The role of particles in the middle atmosphere

sources • properties • interactions

The role of particles in the middle atmosphere

sources • properties • interactions

ice particles, meteoric smoke, ion clusters, other . . .

global measurements

NLC

sodium

water vapour

ground-based measurements

theory and modelling

microphysics

radiativetransfer

lidar

in situ measurements

MISU's rocket programme

Up to 100 tons of meteoric material enter the Earth’s atmosphere each day.

Up to 100 tons of meteoric material enter the Earth’s atmosphere each day.

What happens then ???

The fate of meteoric material in the mesosphere

meteoroids

The fate of meteoric material in the mesosphere

meteoroids

The fate of meteoric material in the mesosphere

meteoroids

The fate of meteoric material in the mesosphere

meteoroids

Why are we interested ?

Meteoric smoke particles may be major players in the mesosphere

• condensation nuclei for ice (NLC, PMSE, ...)

• metal budget

• charge budget

• heterogeneous chemistry

• . . .

But:

Nobody has ever investigated these particles.

But:

Nobody has ever investigated these particles.

In fact, there has been no direct proof of their existence...

MAGICMesospheric Aerosol –Genesis, Interaction, and Composition

MAGICMesospheric Aerosol –Genesis, Interaction, and Composition

Sample meteoric smoke particles and take them to the laboratory !

• Do smoke particles of cosmic origin exist in the mesosphere?

• What is their number density and altitude distribution?

• What is their size?

• What is their composition?

MAGIC

• Do smoke particles of cosmic origin exist in the mesosphere?

• What is their number density and altitude distribution?

• What is their size?

• What is their composition?

MAGIC

The aerodynamics of particle impact:

MAGIC

payload

The aerodynamics of particle impact:

MAGIC sampling surface

payload

The first MAGIC launch:

Esrange, Sweden, January 2005

The first MAGIC launch:

Esrange, Sweden, January 2005

• MAGIC smoke collectors

• hygrometer (optical water measurements)

• charged particle detectors

• meteorological rockets (chaff)

• balloon sounding

• RMR lidar

• MST radar, meteor radar, EISCAT

• ground-based optical and geomagnetic monitoring

• the Odin satellite

The first MAGIC launch:

Esrange, Sweden, January 2005

Payload Recovery

Analysis:

EOL 2200FS 200-kV field emission scanning transmission electron microscope (TEM)

• high-angle annular dark field (HAADF) imaging• energy dispersive x-ray analysis (EDS)

support structure 3 nm TEM grid

nanometer particles

aggregates sub-nanometer particles ?

Stay tuned for more . . .

Nordic Research Board

Department of MeteorologyStockholm University

A Graduate School and Workshop on

Middle Atmospheric AerosolsStockholm, Sweden, October 2-8, 2005

Course Topics:

• Aeronomy of the middle atmosphere • Meteoric material in the middle atmosphere • Ice particles in the polar summer mesosphere • The stratospheric background aerosol • Ice particles in the stratosphere • Particle properties and interactions • Measurement techniques

Teachers:• Jörg Gumbel, Sweden • Niels Larsen, Denmark • Ingrid Mann, Germany • Asta Pellenin-Wannberg, Sweden • Jan Pettersson, Sweden • John Plane, U.K. • Markus Rapp, Germany • Douglas ReVelle, USA • David Siskind, USA • Esa Turunen, Finland • Tomas Waldemarsson, USA

http://www.misu.su.se

The registration deadline is June 5, 2005. There is no registration fee for this course. Support (travel, accomodation) is available from the NorFA network.