NYC SEA BREEZE EVENT 2004.08.09 William T. Thompson, Teddy Holt, and Julie Pullen Naval Research...

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NYC SEA BREEZE EVENT 2004.08.09 William T. Thompson, Teddy Holt, and Julie Pullen Naval Research Laboratory Monterey, CA
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Transcript of NYC SEA BREEZE EVENT 2004.08.09 William T. Thompson, Teddy Holt, and Julie Pullen Naval Research...

NYC SEA BREEZE EVENT 2004.08.09

William T. Thompson, Teddy Holt, and Julie PullenNaval Research Laboratory

Monterey, CA

NYC SEA BREEZE EVENT 2004080912

• Results are shown for nest 5• Δx = 444 m

• Period is preceded by 5 days of data assimilation

• Urban canopy parameterization is used on nests 4 and 5 (more later)

• High resolution, time dependent SST from NYHOPS data on nests 4 and 5

NYC SEA BREEZE EVENT 2004080912

• Animation* from 1200 UTC 9 August to 0000 UTC 10 August 2004, showing 2 m wind (m/s) and potential temperature (K)*hourly from 12-18; 15 min thereafter

• Wind turns onshore at ~1600 UTC or 1400 LT and slowly advances over Brooklyn and Queens

• Sea breeze front reaches Manhattan at ~1700 LT• Front continues into New Jersey• Wind over Manhattan Island remains light throughout

the period

NYC SEA BREEZE EVENT 2004080912

• Animated cross sections in the plane A-B from 1800 UTC to 0000 UTC 22 August 2004

• Frames every 15 min• A-B is 37.5 km from near the shore in Brooklyn,

across lower Manhattan, and into New Jersey• Potential temperature (K) is shown• Note the cool, shallow layer propagating along the

surface from B towards A (SE to NW)• Note also the density current head-like structure at

the leading edge at later hours

SEA BREEZE MAPS (FROM ANIMATION)(2 M WINDS (M/S) AND POTENTIAL TEMPERATURE (K))

1HR INTERVAL

15 MIN INTERVAL

SEA BREEZE CROSS SECTIONS (FROM ANIMATION)(POTENTIAL TEMPERATURE (K))

A

B

A B