Development of the SVP-B drifter idea to have more data and less its cost

Motyzhev S.*, Brown J.**, Horton E.**, Lunev E.*, Kirichenko A.*, Tolstosheev A.*,Yachmenev V.*

* Marine Hydrophysical Institute NASU/Marlin-Yug Ltd, Kapitanskaya,2, Sebastopol, Ukraine, 99011** Naval Oceanographic Office, 1002 Balch Boulevard, Stennis Space Center, MS 39522-5001,USA

Lifetime 2 yearsID16330/WMO61525

Black SeaDecember 2001 – October 2003

1999 – 2004

Technological stage of development

Three rotations around the Black Sea

SST

AP

Lifetime 2 yearsID27136 / WMO33514

South AtlanticDecember 2002 – October 2004

1999 – 2004

Technological stage of development

Buoy’s trajectory Air pressure

2003

”Smart” Buoy Project

20022002A System of Complementary NetworksA System of Complementary Networks

2003

”Smart” Buoy Project

20022002Future drifter monitoring for different areas of

applications might be provided with flexible self-controlled

drifters networks with sensor data analysis by buoy’s

processing possibilities and selection of necessary technical

status of buoy according to velocity and amplitude

variability of parameters under control

2003

”Smart Buoy” Project

ParameterStandard

mode

Storm

mode

AP resolution (hPa) 0.1 0.05

AP dynamic range (hPa)

850.0 to 1054.7 930.00 to 1032.35

APT dynamic range (hPa)

-25.5 to +25.6 -12.75 to +12.80

Interval between samples (min)

60 15

AP measurement

Standard algorithm

40 AP samples (40 s).

Median of the lowest 3 points.

Median within 1 hPa

10 standard measurements within 15 minutes with 90 sec interval.

Average of 10 medians

Rank for data transfer 1(0) 4 (0, 1, 2, 3)

SVPBD2 drifter (Storm Buoy)

2003

SVPBD2 Storm Buoy

Jul 2003--Sep 2004

Hurricane FABIAN

Goal of 2003 experiment in the

Tropical Atlantic

Investigation of the ways of

tropical waves transformation in

AP depression and so on

29 Aug-1 Sep2003

Developments of the “Smart Buoy” idea in 2004

PTT МТ-105АCLS Type approval -2004

Programming of Argos-2 channels (S1-S14)

Size: 100 80 20 mm

Weight: 90 г

Sensor board ММ400

AP and up to 300 temperature sensors distributed within 600 м

Size: 80 50 20 mm Weight: 65 г

New Electronics of the “Smart Buoy”

Developments of the “Smart Buoy” idea in 2004SVPBD2T (temperature) drifter

Sensorof subsurfacetemperatureat the end of

tether line

Two complete buoys within a shipping crate

Parameter 2003 Storm Buoy 2004 Storm Buoy

Number of satellites 3 2

Data format DBCP-M2 Cut AP&APT range Standard + extra bits

Repetition period 15 min 30 min

Rank 4 5

AP resolution 0.05 hPa 0.1 hPa

Developments of the “Smart Buoy” idea in 2004SVPBD2T (temperature) drifter

Goal of 2004 experiment

in the Tropical Atlantic

Investigation of SST and SBT

variety before, during and

under the tropical storms

Hurricane Frances

August 2004

Developments of the “Smart Buoy” idea in 2004SVPBD2TC (chain) drifter

Sensorof subsurfacetemperatureat the end of

tether line

9 temperature sensors of chain17, 22, 27, 32, 37, 42, 47, 52,

57 m

Sensorof subsurfacetemperatureat the end of

tether line

Developments of the “Smart Buoy” idea in 2004SVPBD2TC (chain) drifter

Novelties:1. Quasilagrangian drifter2. Stabilization of a depth of chain’s upper point

Goal of 2004 experiment

in the Black SeaTesting of new drifter andvalidation of remotesensing data.

Thermocline variability after data processingCooling of upper water from 7 to 13 September

Developments of the “Smart Buoy” idea in futureSVPBD2L (light) drifter

Goal: Effectiveness of drifter observations Decrease of size and price of buoy Decrease of attendant costs (shipment, storage, etc.) Additional measuring possibilities

Ways: New electronics Surface float with Ø25-30 cm Holey Sock with Ø60-65 cm and 5-6 m length Additional sensors and indirect measurements

Parameters Standard Additional

Subsurface Current (15 m) Subsurface Temperature (12 m)

Sea Surface Temperature Profile of Temperature (15-100 m)

Battery Voltage Profile of Subsurface Currents

Air Pressure Parameters of Surface Waves

Air Pressure Tendency Adaptive measurements

Conclusion

1. It seems the technological stage of drifter technology to have reliable standard data is closely to be completed

2. Future activity of drifter community might be directed to have more data with less cost of measurements

3. One of the possible ways for realization of this goal could be the development of SVPB drifter having less sizes and additional low-cost set of sensors with direct and indirect application of their data

Presentation on

Development of SVP-Drifter for More Data at Lower Cost

Author(s) Name :Dr Sergei Motyzhev, Ukraine

WMO IOC

18-19 October 2004 Chennai, India.

Tuesday, 19th October 2004

WMO