Intense Spring Sea Breezes Along the New York - New Jersey Coast Stanley David Gedzelman and...
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![Page 1: Intense Spring Sea Breezes Along the New York - New Jersey Coast Stanley David Gedzelman and Kwan-Yin Kong EAS Department and NOAA CREST Center City College.](https://reader035.fdocuments.net/reader035/viewer/2022062715/56649d835503460f94a6913f/html5/thumbnails/1.jpg)
Intense Spring Sea Breezes Alongthe New York - New Jersey Coast
Stanley David Gedzelman and Kwan-Yin KongEAS Department and NOAA CREST Center
City College of New Yorkand
Shermane AustinComputer Sciences Department
Medgar Evers College
Supported by NASA MUSPINNOAA CREST
![Page 2: Intense Spring Sea Breezes Along the New York - New Jersey Coast Stanley David Gedzelman and Kwan-Yin Kong EAS Department and NOAA CREST Center City College.](https://reader035.fdocuments.net/reader035/viewer/2022062715/56649d835503460f94a6913f/html5/thumbnails/2.jpg)
Overview
During 1998, over 50 private weather stations recorded hourly weather data mainly in New Jersey. When added to NWS stations, the grid provided a mesoscale view of diverse weather phenomena including Sea Breezes, Urban Heat Islands, Back Door Cold Fronts (no good 1998 cases), and Squall Lines.
At the end of March 1998, record warmth inland and cold SST’s caused a few days of extremely strong sea breezes.
We present sea breeze statistics and diagnose the intense sea breeze of 28 March.
![Page 3: Intense Spring Sea Breezes Along the New York - New Jersey Coast Stanley David Gedzelman and Kwan-Yin Kong EAS Department and NOAA CREST Center City College.](https://reader035.fdocuments.net/reader035/viewer/2022062715/56649d835503460f94a6913f/html5/thumbnails/3.jpg)
Sea Breeze Strength is indicated by1. Wind speed on the coast2. Cooling along the coast3. Penetration distance inland
Cooling by the sea breeze was measured by taking the average mid afternoon temperature difference between 3 (black) inland and 3 (white) coastal stations (shown on the map of the next slide). The inland stations may seem close to the coast, but the westerly synoptic scale wind component on most sea breeze days was fast enough to minimize the sea’s impact.
The nearest SST’s were measured at NWS Buoy 44025. Nearest soundings were taken at OKX.
The daily temperature cycle of one inland and one shore station and the impact of the wind direction during the strong sea breezes at the end of March 1998 are shown on the slide after the map.
![Page 4: Intense Spring Sea Breezes Along the New York - New Jersey Coast Stanley David Gedzelman and Kwan-Yin Kong EAS Department and NOAA CREST Center City College.](https://reader035.fdocuments.net/reader035/viewer/2022062715/56649d835503460f94a6913f/html5/thumbnails/4.jpg)
LBI
FRIJFK
TEB
NBRBLM
Cooling by Sea Breeze TINLAND - TSHORE
44025BUOY
OKXNYC
![Page 5: Intense Spring Sea Breezes Along the New York - New Jersey Coast Stanley David Gedzelman and Kwan-Yin Kong EAS Department and NOAA CREST Center City College.](https://reader035.fdocuments.net/reader035/viewer/2022062715/56649d835503460f94a6913f/html5/thumbnails/5.jpg)
40
50
60
70
80
90
0 24 48 72 96
Day
T (
F)
0
90
180
270
360
Win
d D
irec
tio
n (
o)
27 Mar 28 Mar 29 Mar 30 Mar
FRI
BLM
W SW NW SWE
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Sea Breeze Potential
The motive force for a sea breeze is the difference between land and sea temperatures. The maximum possible air temperature over land is roughly equal to 850 - SST, where 850 equals T850 brought dry adiabatically to sea level (although superadiabatic lapse rates near the ground are possible in late spring and early summer).
The maximum possible temperature difference is indicated on the next slide by the black curve. Actual cooling due to the sea breeze (TINLAND - TSHORE) is indicated by the yellow curve.
Note that the two strongest sea breezes occurred at the end of March and in mid May. Sea breeze potential is much weaker in summer when SST’s are relatively warm.
![Page 7: Intense Spring Sea Breezes Along the New York - New Jersey Coast Stanley David Gedzelman and Kwan-Yin Kong EAS Department and NOAA CREST Center City College.](https://reader035.fdocuments.net/reader035/viewer/2022062715/56649d835503460f94a6913f/html5/thumbnails/7.jpg)
-20
-10
0
10
20
30
40
50
98000 98031 98062 98093 98124 98155 98186 98217 98248 98279 98310 98341 98372
Month
T (
F)
JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC
850 - TSEA
TINLAND - TSHORE
Potential vs Actual Cooling of Sea Breeze
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Sea Breeze Days
Did inland temperatures approach the maximum possible value indicated by the 850 hPa Chart? This is indicated on the next slide when the green curve matches the black curve.
Answer: Yes, on many spring and summer days, but No on most Fall and Winter days
Sea Breeze days are indicated by yellow triangles and squares on the next slide. The criteria for a sea breeze day are faster southerly wind component (by 5 knots) and cooler afternoon temperatures (by 5°F) at JFK than at NYC.
Note that the black curve grossly overestimates potential for a sea breeze on days of back door cold fronts and NE winds in early May 1998.
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-20
-10
0
10
20
30
40
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0 31 62 93 124 155 186 217 248 279 310 341 372
DAY
DT
(F
)
JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC
850 - TSEA
TINLAND - TSEA
Sea Breeze Days
Sea Breeze Days vs Potential Cooling of Sea
Back Door Days
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Animation of Surface Weather Data for the Strong Sea Breeze of 28 March 2004.
Start Time 1500 EST (2000 UTC) 27 MarchEnd Time 1800 EST (2000 UTC) 29 March
Note:
1. Strong westerlies displaced the sea breeze on 27 March and largely suppressed it on 29 March.
2. SSW winds on 28 March enhanced the strong sea breeze over Long Island and led to a sharp sea breeze front over New Jersey.
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Animation of Surface Mesonet Data (EST)
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Animation of Surface Mesonet Data (EST)
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Animation of Surface Mesonet Data (EST)
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Animation of Surface Mesonet Data (EST)
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Animation of Surface Mesonet Data (EST)
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Animation of Surface Mesonet Data (EST)
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Animation of Surface Mesonet Data (EST)
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Animation of Surface Mesonet Data (EST)
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Animation of Surface Mesonet Data (EST)
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Animation of Surface Mesonet Data (EST)
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Animation of Surface Mesonet Data (EST)
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Animation of Surface Mesonet Data (EST)
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Animation of Surface Mesonet Data (EST)
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Animation of Surface Mesonet Data (EST)
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Animation of Surface Mesonet Data (EST)
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Animation of Surface Mesonet Data (EST)
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Animation of Surface Mesonet Data (EST)
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Animation of Surface Mesonet Data (EST)
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Animation of Surface Mesonet Data (EST)
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Animation of Surface Mesonet Data (EST)
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Animation of Surface Mesonet Data (EST)
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Animation of Surface Mesonet Data (EST)
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Animation of Surface Mesonet Data (EST)
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Animation of Surface Mesonet Data (EST)
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Animation of Surface Mesonet Data (EST)
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Animation of Surface Mesonet Data (EST)
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Animation of Surface Mesonet Data (EST)
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Animation of Surface Mesonet Data (EST)
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Animation of Surface Mesonet Data (EST)
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Animation of Surface Mesonet Data (EST)
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Animation of Surface Mesonet Data (EST)
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Animation of Surface Mesonet Data (EST)
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Animation of Surface Mesonet Data (EST)
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Animation of Surface Mesonet Data (EST)
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Animation of Surface Mesonet Data (EST)
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Animation of Surface Mesonet Data (EST)
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Animation of Surface Mesonet Data (EST)
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Animation of Surface Mesonet Data (EST)
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Animation of Surface Mesonet Data (EST)
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Animation of Surface Mesonet Data (EST)
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Animation of Surface Mesonet Data (EST)
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Animation of Surface Mesonet Data (EST)
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Animation of Surface Mesonet Data (EST)
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Animation of Surface Mesonet Data (EST)
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Animation of Surface Mesonet Data (EST)
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Animation of Surface Mesonet Data (EST)
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Animation of Surface Mesonet Data (EST)
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Animation of Surface Mesonet Data (EST)
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Animation of Surface Mesonet Data (EST)
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Animation of Surface Mesonet Data (EST)
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Animation of Surface Mesonet Data (EST)
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Animation of Surface Mesonet Data (EST)
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MM5 Simulations of Sea Breeze (3rd mesh 2 km)
To reproduce the sea breeze two modifications had to be made.
1. Correct the smoothed objective SST and Reservoir T analyses.
2. Double vertical resolution in the Atmospheric Boundary Layer
The next slides show the
1. Objective and corrected SST analyses.
2. IR Skin Temperatures (verifying corrected SST analysis)
3. MM5 simulation at 1900 UTC with corrected SST analysis and (a) lower, (b) higher boundary layer resolution (note fog)
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4
6
8
Adjusted SST isotherms
SST analysis (°C) based on NCEP 2.5°x 2.5°gridded
analysis
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27 MAR 0800 UTCIR Satellite Skin Temperatures
0700 28 MAR 1998
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28 MAR 0700 UTC
Concluding Remarks
Dense mesonets and high resolution modeling will continue to improve reporting and forecasting accuracy of sea breezes and other local weather phenomena such as back door cold fronts.
We urge better coordination of the many private weather stations maintained by afficiandos, even if standardization remains a problem.