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Ocean Vector Wind Experience. Joe Sienkiewicz NOAA Ocean Prediction Center. NOAA Ocean Prediction Center – impact on operations. QuikSCAT wide swath 2 passes per day consistency wind range Cultural change revolutionized warning, analysis and forecast processes

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ocean vector wind experience

Ocean Vector Wind Experience

Joe Sienkiewicz

NOAA Ocean Prediction Center

noaa ocean prediction center impact on operations
NOAA Ocean Prediction Center – impact on operations

QuikSCAT

wide swath

2 passes per day

consistency

wind range

Cultural change

revolutionized warning, analysis and forecast processes

focus on Hurricane Force conditions

Success – timely availability in forecaster workstations

hurricane force extratropical cyclone

kts

Hurricane Force Extratropical Cyclone

Intense, non-tropical cyclones

with hurricane force winds

Feb 09, 2007, North Atlantic

hurricane force extratropical cyclones observed

Improved wind algorithm, rain impact flag available Oct 06

QuikSCAT winds Operational in N-AWIPS Workstations Oct 01

12.5 km QuikSCAT Available May 04

Hurricane Force Wind Warning Initiated Dec 2000

QuikSCAT Launch Jun 99

Atlantic -194

Pacific - 177

371 HF Cyclones

Hurricane Force Extratropical Cyclones Observed
quikscat and tropical cyclones at nhc

34-kt wind radii from QuikSCAT

Accurate 34-kt wind radii critical for timing and placement of coastal watches and warnings

QuikSCAT and Tropical Cyclones at NHC
  • Estimating intensity, especially for tropical depressions and tropical storms, but cannot be used for major hurricanes
  • Detection/tracking of TC centers for analysis and model initialization
  • Improved gale and storm force wind radii analysis in TCs  affects watch/warning areas
gap winds gulf of tehuantepec
Gap Winds – Gulf of Tehuantepec

12.5-km retrievals available 

  • Eight-year QuikSCAT-based climatology finds average of 12.4 gale-force events and 5.5 storm-force events per season
  • 10-m wind guidance from operational NWP guidance currently available to TAFB forecasters has little skill in predicting storm-force Tehuantepec events
  • Composite results suggest there may be identifiable synoptic-scale signals to help forecasters differentiate between storm-force and gale-force Tehuantepec events
diagnostic of nwp initial conditions

kts

Diagnostic of NWP initial conditions

GFS – 3 hour forecast of wind speed 12.5 km QuikSCAT

Maximum Wind speed 20 knots Maximum Wind speed 40 knots

A GALE warning was issued.

winds near sst gradients1
Winds near SST gradients

GFS wind speed bias for

marginally stable PBL

osvw measurements
OSVW Measurements
  • Benefit - mainly to offices with large areas of ocean responsibility
  • Limitations to date – coastal waters, rain, resolution, and retrievals in high winds
existing planned proposed ovw missions
Existing, Planned & Proposed OVW Missions

97

98

99

00

01

02

03

04

05

06

07

08

09

10

11

12

13

14

15

1000 km

MIS C-2

WINDSAT

500 km – failure ofon-board recording

2 x 550 km w/ 720-km nadir gap

ERS-2

ASCAT/METOP – 3-satellite series

AMI/ERS-2

Timely data access / quality?

HY-2 – 3-satellite series

Timely data access /quality?

SeaWINDS/ADEOS-II

OceanSat-2 scatterometer

1800 km

Seawinds/QuikSCAT

Q’SCAT Follow-on

In orbit

Approved

Planned/Pending Approval