OutlineOutline

2004 Hurricane Drifter Deployment 2004 Hurricane Drifter Deployment OverviewOverview

Atmospheric Pressure Results from Atmospheric Pressure Results from Hurricanes Fabian (2003), Frances Hurricanes Fabian (2003), Frances (2004) and Jeanne (2004)(2004) and Jeanne (2004)

Wind Data Results from Hurricane Wind Data Results from Hurricane FabianFabian

Review of 2003 Experiment

What We DroppedWhat We Dropped

16 Minimet 16 Minimet DriftersDrifters

Drifter LifeDrifter Life

2 Did not transmit data2 Did not transmit data 3 Quit working within 2 hours of 3 Quit working within 2 hours of

deploymentdeployment 3 Transmitted from drop site, but died3 Transmitted from drop site, but died

before complete hurricane before complete hurricane passagepassage

8 Provided data through hurricane 8 Provided data through hurricane and and beyondbeyond

What We LearnedWhat We Learned

Acoustic wind Acoustic wind sensor saturated at sensor saturated at high windshigh winds

Sealing of some Sealing of some buoys not properly buoys not properly donedone

Buoys can be Buoys can be effectively air effectively air dropped in front of dropped in front of a hurricanea hurricane

2004 Experiment2004 Experiment

14 Minimet14 Minimet 8 ADOS8 ADOS 14 SVP with 100m drogue14 SVP with 100m drogue 3 Standard SVP-B3 Standard SVP-B

39 Total Buoys39 Total Buoys

Buoy SensorsBuoy Sensors

ADOSADOS 100m Thermistor 100m Thermistor

ChainChain Barometer (+/- 1mb.)Barometer (+/- 1mb.) SST Thermistor (+/- SST Thermistor (+/-

0.1ºC)0.1ºC) Wind Direction – Wind Direction –

Compass/Vane (+/-10º)Compass/Vane (+/-10º) Wind Speed – WOTAN Wind Speed – WOTAN

(+/-??) (+/-??) Irradiance SensorsIrradiance Sensors

MinimetMinimet Barometer (+/- 1mb.)Barometer (+/- 1mb.) Thermistor (+/- Thermistor (+/-

0.1ºC)0.1ºC) Submergence Sensor Submergence Sensor

(drogue on/off)(drogue on/off) Wind Direction – Wind Direction –

Compass/Vane (+/-Compass/Vane (+/-10º)10º)

Wind Speed – Wind Speed – WOTAN (+/-??) WOTAN (+/-??)

Drifter LifeDrifter Life

35 of 39 Drifters transmitted data 35 of 39 Drifters transmitted data through the hurricanethrough the hurricane

37 of 39 drifters eventually 37 of 39 drifters eventually transmitted datatransmitted data

1 never worked1 never worked 1 stopped working after 1 day1 stopped working after 1 day

2004 Array – Frances

Wind Direction Data in Hurricane Fabian

Drifter av Diff rms N av Diff rms N1. 41583 21 53 178 53 64 13

2. 41578 -1 33 368 -16 67 433. 41581 5 35 361 -8 52 294. 41582 0 40 367 -7 63 615. 41584 1 31 373 -11 65 356. 41585 -1 30 338 -2 23 407. 41587 1 32 397 -7 46 258. 41588 -4 39 384 -11 32 41

2.-8. total 0° 35° 2588 - 9° 53° 274

Collocated Wind Direction statistics No Rain Rain

The EndThe End