1 xovwm user impact study coastal simulations contacts: zorana.jelenak@noaa.gov...

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XOVWM User Impact Study

Coastal Simulations

Contacts:

Zorana.Jelenak@noaa.gov

Paul.S.Chang@noaa.gov

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QuikSCAT Follow-On Mission Options

In June 2007, NOAA asked JPL to conduct a study to provide the technical readiness, cost, and impact to NOAA of (1M investment):– A QuikSCAT equivalent re-flight– An Extended Ocean Vector Winds Mission (XOVWM) – A constellation (2) of XOVWM instruments– A draft of the final report documenting results of this

study will be ready by January, 2008

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XOWVM Impact Study

• As part of JPL study user input is needed regarding proposed mission options

• Input desired by 4th of January

• Mini wind workshop held at the end of NOAA Hurricane conference and study results were presented

• GoTo meetings are set up to reach as many interested users as possible

• Written statements from offices are desired addressing the following questions:

– What realized impacts on your daily work would be continued if QuikSCAT-like instrument is launched (swell forecast?, )

– Based on simulation results presented what is perceived impact that new capability can bring to your areas of responsibility (no buoys in particular areas of interest, wind events affecting your particular region not observed so far…)

– Due to time limitations simulation study is limited in its scope. In order to get more comprehensive understanding of new capability what are simulations that would be of interest for your area of responsibilities

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Target Level 1 Performance Requirements

For NASA missions, these are must meet requirements which must be demonstrated prior to launch. NASA instruments frequently perform significantly better the requirements.

Parameter QuikSCAT Replacement XOVWM

Operational Life 5 years with consumables for 10 years

Same

Coverage 1800km (90% of the ocean surface in every 24 hour period)

Same

Product Latency < 180 minutes for 85% of the data Same

Wind Vector Cell Resolution 25/12.5 km 5 km

Coastal Mask 20 km 5 km

Wind Speed Accuracy

3-20 m/s: 2 m/s rms Same

20-30 m/s: 10% rms Same

30-80 m/s: not specified 30-80 m/s: 10 % rms

Wind Direction Accuracy3-30 m/s: 20 rms Same

30-80 m/s: not specified 30-80 m/s: 20 rms

•Higher spatial resolution (~5km)•Full wind speed range (to category 5), •Coastal coverage 2.5-5 km of land•Significantly better retrievals in rain impacted measurements

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XOVWM Coastal Studies

• Motivation

– Nearly 50% of the US population lives near the coasts

– Coastal fisheries depend on wind-driven nutrient upwelling

– The shipping and fishing industries need to know winds near the coasts

– Winds near the coasts are influenced by land topography and can exhibit strong jets and fronts

– XOVWM can measure winds with 2.5km of the coast

– QuikSCAT measures winds only up to 20 km from the coast, and cannot meet the coastal winds needs

• Study description:

– Use NOGAPS model wind complemented with SAR 500m resolution wind speed observations to simulate XOVWM and QuikSCAT data (SAR does not provide direction data and has limited temporal coverage.)

– Primary data (Alaska) selected by NOAA based on known hazardous coastal winds in shipping lanes and fisheries

– Additional data (California & Oregon) selected based on known highly variable coastal winds

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Alaska Coast

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Alaska Coast: Chatham Strait & Cross Sound

Juneau

Sitka

Cross Sound

Chatham Strait

The Alaska coast near Juneau and Sitka has frequent strong coastal winds which affect the safety of shipping and fishing boats.

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Alaska Coast

Currently Available Routine Data Availability

Model winds are routinely available at low resolution, which fail to capture high speed coastal winds and variability

Occasionally, SAR wind speed data (no directions) are available that give an indication of the true wind variability. Note speeds do not agree with model.

9SAR Winds + NOGAPS Directions XOVWM RetrievalsQuikSCAT-like Retrievals

Gulf of Alaska Wind Retrieval ExamplesGulf of Alaska Wind Retrieval Examples

Juneau

Chatman Strait

55.5N

58.5N

136W 133W

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Gulf of Alaska Wind Retrieval Examples

SAR Winds + NOGAPS Directions XOVWM RetrievalsQuikSCAT-like Retrievals

56.5N

60N

154W 151W

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12

144W

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West Coast

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West Coast Wind Example – 05/09/05

SAR Winds + NOGAPS Directions XOVWM RetrievalsQuikSCAT-like Retrievals

San Francisco Bay

Pt Reyes

Pt Arena

124W 122.5W

37.5N

39.5N

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West Coast Wind Example – 05/06/05

SAR Winds + NOGAPS Directions XOVWM RetrievalsQuikSCAT-like Retrievals

San Francisco Bay

Pt Reyes

Pt Arena

39.5N

37.5N

124.5W 122.5W

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08/23/05 – 18:25UTC

SAR Winds + NOGAPS Directions XOVWM RetrievalsQuikSCAT-like Retrievals

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08/26/05 – 18:30UTC

SAR Winds + NOGAPS Directions XOVWM RetrievalsQuikSCAT-like Retrievals

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09/08/05 – 06:10UTC

SAR Winds + NOGAPS Directions XOVWM RetrievalsQuikSCAT-like Retrievals

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Written Feedback on Following Questions is Desired by 4th of Jan ‘08

• What realized impacts on your daily work would be continued if QuikSCAT-like instrument is launched (swell forecast?, )

• Based on simulation results presented what is perceived impact that new capability can bring to your areas of responsibility (no buoys in particular areas of interest, wind events affecting your particular region not observed so far…)

• Due to time limitations simulation study is limited in its scope. In order to get more comprehensive understanding of new capability what are simulations that would be of interest for your area of responsibilities

Additional information available at:

http://manati.orbit.nesdis.noaa.gov/SVW_nextgen/osvw_mini_workshop.html