1. Tethered Balloon Activities
Marion Maturilli (AWI), Holger Siebert (TROPOS), and others…

2. Balloon Sounding Activities
radiosondes
4 x daily
ozone sondes
1 x weekly
COBALT sondes
1 x monthly
CFH sondes
1 x monthly
handled by
2 persons
tethered balloon operation whenever possible
2 intensive campaigns
1 year

3. Strategy to be discussed:
(1)
Frequent balloon launches with a small balloon
equipped with basic sensor packages for year-around observations
(2)
Two intensive campaigns with a big balloon
and more sophisticated observations in two different seasons
tethered balloon operation whenever possible
2 intensive campaigns

4. (1) AWI Tethered Balloon
payload of 3 kg  profiles up to 2 km
(maximum payload weight 5 kg limits profiling to ~800m)
launch conditions:
maximum surface wind speed 5-6 m/s
9 m3 balloon
operation can be handled by 1 – 2 persons
When not in use,
the tethered balloon
is stored in a tent.

5. Frequent Meteorological Profiles
Example: 18 April 2009 (NP36)
single sonde profiles
other option:
multi-sonde profiles,
Boundary layer thermodynamics over the annual cycle

6. Honing on VERtical Cloud & Aerosol properTies
J. Creamean,
CU Boulder/NOAA
HOVERCAT:
Honing on VERtical Cloud & Aerosol properTies
Front of box
Vertical profiling of ice nucleating particles
Aerosol size distributions from an
optical particle counter
(OPC; 0.38 – 20 µm in diameter)
Camera post
Inlets
Collection of aerosol samples on filter
using a Time-Resolved Aerosol Particle
Sampler (TRAPS)
Battery
pack
Micropump
OPC
TRAPS
Intended launch schedule:
weekly or biweekly during all seasons,
profiling in clear sky and clouds
Inside the box

7. Aerosolfilter with pump on balloon
Analysis: chemical: Marine Sugars/TEP
physical: INP concentration (freezing array)
Aim: Connecting Marine Sugars from Ocean/Sea surface Microlayer and from shipborne aerosol measurements with vertical aerosol measurements
Equipment on ballon during PS 106.1,
Duration: 3 h
Flow: 10 L/min
Payload: < 1 kg
Hydroxide, anion
Form of ion chromatography
Manuela van Pinxteren Frank Stratmann
Hartmut Herrmann
Pump
Filter holder (quartz fiber)
with PM 10 inlet

8. Markus Frey
BAS

9. (2) TROPOS Tethered Balloon
Max height about 1 km
Max wind speed up to 15 m s-1
Vertical speed about 1 -2 m s-1
Flying in mixed-phase clouds possible
Total payloads up to 10 kg
Standard meteorology, telemetry link
Payloads for
Basic meteorological parameters
Turbulence
Radiation
Aerosol properties

10. Turbulence Probes TROPOS & University Leipzig
Ultrasonic anemometer with 50 Hz resolution combined with precise attitude and motion package
Small hot-wire based turbulence probe

11. Broadband Radiation (2x)
TROPOS & University Leipzig

12. The New Aerosol Cube
TROPOS & University Leipzig
Micro-aethalometer
AE51, 880 nm
Single channel
Tricolor Absorption Photometer STAP (Brechtel) 450, 525, 624 nm
The cube is flexible and can be equipped with different systems up to 5 kg in total.
The cube is isolated, a temperature control is under development
OPS: TSI 3330
A new light-weight combination of SMPS and OPC will be considered for 2018

13. The NCAR Video Ice Particle Sampler (VIPS)
Measurements:
Ice particle shape and size from 20 to 2000 mm
Relative size distributions in any conditions.
Absolute size distributions require co-located wind measurements (and steady winds at 5 m/s or so)
Weight: currently 3 kg, can be reduced to 1.5 kg
- Can be operated by others (after instruction)
- Data analysis not automated ( funding application
for grad student to analyze data)
Assuming that there is positive feedback from the
St Petersburg Workshop, I will put in a proposal to US NSF to fund the VIPS for TBS use as well as a
ship-borne fog particle measurement instrument.
 Carl Schmitt,
There are some "consumables" for the instrument, so unlimited use would require regular maintenance, probably 3-4 hours every 20 hours of operation time.  Basic operation would likely require half an hour of prep before and the same amount of time after to save the data (take videos off of SD card). 

14. Result of this morning‘s side meeting
(1)
small balloon year-around observations
(AWI)
meteorological sondes (AWI)
OPC for ice nucleating particles,
aerosol size distribution (CU Boulder, NOAA)
Aerosol Filter Sampler
for chemical composition (TROPOS)
OPC (CLASP) , filter collector (BAS)

15. Result of this morning‘s side meeting
(2)
big balloon dedicated campaign periods
(TROPOS)
turbulence
radiation
(TROPOS, Univ.Leipzig)
Aerosol / INP: OPC, SMPS
(UCAR)
VIPS
The 2 legs with intense tethered balloon measurements
should cover the aircraft activity period.

16. To be discussed feasibility of big balloon operation: manpower !
(3 persons + 2 helping)
which parameters / time schedules are needed by models ?
(e.g. aerosol size distribution 1x per week or more frequent)
air space:
coordination with helicopter and UAV activity necessary
Are we lacking crucial parameters ?