Mapping the Mid-Atlantic Cold Pool with GliderPalooza-2013 W. Brown, O. Schofield, J. Kohut, J....
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Transcript of Mapping the Mid-Atlantic Cold Pool with GliderPalooza-2013 W. Brown, O. Schofield, J. Kohut, J....
Mapping the Mid-Atlantic Cold Pool
with GliderPalooza-2013
W. Brown, O. Schofield, J. Kohut, J. Wilkin, & W. Boicourt
Cold Pool Context Cold Pool Measurements – Single GliderCold Pool Mapping – Glider Fleet
MTS/IEEE OCEANS’15 Presentation
21 October 2015
Mid Atlantic Bight (MAB) COLD POOL
Ou & Houghton, 1982NOAA/NMFS 1979 Survey Bottom Temperatures
Remnant winter water …isolated by springtime surface warming/freshening => Cold Pool
HISTORICAL EVIDENCE
.. fed by cold water early summer
Mid Atlantic Bight (MAB) COLD POOL
Ou & Houghton, 1982NOAA/NMFS 1979 Survey Bottom Temperatures
Remnant winter water …isolated by springtime surface warming/freshening => Cold Pool
HISTORICAL EVIDENCE
.. fed by cold water early summer
“coldest patch”
Mid Atlantic Bight (MAB) COLD POOL
HISTORICAL EVIDENCE
.. fed by cold water early summer
.. warmed during summer
NOAA/NMFS 1979 Survey Bottom Temperatures Ou & Houghton, 1982
~ 5 km/day
Mid Atlantic Bight (MAB) COLD POOL
HISTORICAL EVIDENCE
.. fed by cold water early summer
.. warmed during summer
NOAA/NMFS 1979 Survey Bottom Temperatures Ou & Houghton, 1982
~ 5 km/day
COLD POOL SCIENCE QUESTIONS
Relative importance of:
early summer along-shelf advection in Cold Pool “coldest patch” formation ?
top-down & cross-frontal mixing processes in the Cold Pool summer warming ?
different erosion processes in the autumn Cold Pool demise ?
ocean and atmospheric factors causing Cold Pool inter-annual variability ?
Measuring the MAB Cold Pool with Slocum Ocean Gliders
Mapping the 2007 Coastal Ocean ….with a ONE-GLIDER “Fleet “
May-Jun 2007
COLD POOL Established Late Spring – cooling !
Mapping the 2007 Coastal Ocean ….with a ONE-GLIDER “Fleet “
May-Jun 2007
COLD POOL Established Late Spring – cooling !
Tmin = 4.78
Mapping the 2007 Coastal Ocean ….with a ONE-GLIDER “Fleet “
May-Jun 2007
COLD POOL Established Late Spring – cooling !
Tmin = 5.32 Tmin = 4.78
Mapping the 2007 Coastal Ocean ….with a ONE-GLIDER “Fleet “
May-Jun 2007
COLD POOL Established Late Spring – cooling !
Tmin = 5.32
Mapping the 2007 Coastal Ocean ….with a ONE-GLIDER “Fleet “
Jul-Aug 2007
COLD POOLSummer - warming
Tmin = 5.60
Mapping the 2007 Coastal Ocean ….with a ONE-GLIDER “Fleet “
Sep – Oct 2007
COLD POOL 2007 Autumn - warming - erosion
Tmin = 7.71Tmin = 8.48
Mapping the 2007 Coastal Ocean ….with a ONE-GLIDER “Fleet “
Sep – Oct 2007
COLD POOL 2007 Autumn - warming - erosion
Tmin = 7.71Tmin = 8.48
Summary Mapping the 2007 Coastal Ocean ….with a ONE-GLIDER “Fleet “
Glider Transect Tmin … a proxy for Cold Pool temperature “
Apr Jun Aug Oct
12
68
4
Summary Mapping the 2007 Coastal Ocean ….with a ONE-GLIDER “Fleet “
Tmin vs. TimeCooling Phase
Apr Jun Aug Oct
12
68
4
cooling
Summary Mapping the 2007 Coastal Ocean ….with a ONE-GLIDER “Fleet “
Apr Jun Aug Oct
12
68
4
warming
Tmin vs. TimeWarming Phase
Glider Fleet Measurements +
Data Assimilation Models
Mapping the 2013 Coastal Ocean ….with a GLIDER “Fleet “
Summary
Ocean Glider Fleet Measurements ? …. a cost-effective technology for REAL-TIME Cold Pool observation
Transect Minimum Temperature & Departures? …. an effective proxy for Cold Pool Water Mass
Cold Pool Mapping Requirements? …. flexible time/space water mass definitions
Timely Maps of the Cold Pool ? .… require glider data –assimilation ocean modeling
Forecasting MAB Cold Pool Disposition? …. within reach
ESPRESSOBottom Temperature
27 May 2013
Wilkin et al., 2013
Cold Pool Array Design: Model Guidance
Mapping the 2013 Coastal Ocean ….with a GLIDER “Fleet “
Glider Transect Tmin
Mapping the Autumn 2013 COLD POOL ….with a glider pair
2nd week September 3rd week
BLUEBLUE
RU-23
Mapping the Autumn 2013 COLD POOL ….with a glider pair
2nd week September 3rd week
BLUEBLUE
RU-23RU-23
Mapping the Autumn 2013 COLD POOL ….with a glider pair
2nd week September 3rd week
BLUEBLUE
RU-23RU-23
with TEMPERATURE DEPARTURES
TD = T – Tmin
TD statistics suggest
TD < 4.3oC (1 σ)
Defining COLD POOL WATER – 2007 Tmin vs Smin Diagram
with TEMPERATURE DEPARTURES
TD = T – Tmin
TD statistics suggest
TD < 4.3oC (1 σ)
Tmin vs Smin Diagram
Defining COLD POOL WATER – 2007
Mapping the mid-September 2013 COLD POOL in the SNEB
Mapping the mid-September 2013 COLD POOL in the SNEB
The inshore edges of the COLD POOL !
Mapping the mid-September 2013 COLD POOL in the SNEB
The inshore edges of the COLD POOL !
The offshore edges of the COLD POOL !
Mapping the mid-September 2013 COLD POOL in the SNEB
Mapping the mid-September 2013 COLD POOL in the SW MAB
The inshore edges of the COLD POOL !
Mapping the mid-September 2013 COLD POOL in the SW MAB
The inshore edges of the COLD POOL !
Mapping the mid-September 2013 COLD POOL in the SW MAB
The offshore edge of the COLD POOL !
Mapping the mid-September 2013 COLD POOL in the SW MAB
offshore flow of the COLD POOL ?
Mapping the mid-September 2013 COLD POOL in the SW MAB
?
?
Summary
Ocean Glider Fleet Measurements ? …. a cost-effective technology for REAL-TIME Cold Pool observation
Transect Minimum Temperature & Departures? …. an effective proxy for Cold Pool Water Mass
Cold Pool Mapping Requirements? …. flexible time/space water mass definitions
Timely Maps of the Cold Pool ? .… require glider data –assimilation ocean modeling
Forecasting MAB Cold Pool Disposition? …. within reach
Summary
Ocean Glider Fleet Measurements ? …. a cost-effective technology for REAL-TIME Cold Pool observation
Transect Minimum Temperature & Departures? …. an effective proxy for Cold Pool Water Mass
Cold Pool Mapping Requirements? …. flexible time/space water mass definitions
Timely Maps of the Cold Pool ? .… require glider data –assimilation ocean modeling
Forecasting MAB Cold Pool Disposition? …. within reach
Summary
Ocean Glider Fleet Measurements ? …. a cost-effective technology for REAL-TIME Cold Pool observation
Transect Minimum Temperature & Departures? …. an effective proxy for Cold Pool Water Mass
Cold Pool Mapping Requirements? …. flexible time/space water mass definitions
Timely Maps of the Cold Pool ? .… require glider data –assimilation ocean modeling
Forecasting MAB Cold Pool Disposition? …. within reach
Summary
Ocean Glider Fleet Measurements ? …. a cost-effective technology for REAL-TIME Cold Pool observation
Transect Minimum Temperature & Departures? …. an effective proxy for Cold Pool Water Mass
Cold Pool Mapping Requirements? …. flexible time/space water mass definitions
Timely Maps of the Cold Pool ? .… require glider data –assimilation ocean modeling
Forecasting MAB Cold Pool Disposition? …. within reach
Summary
Ocean Glider Fleet Measurements ? …. a cost-effective technology for REAL-TIME Cold Pool observation
Transect Minimum Temperature & Departures? …. an effective proxy for Cold Pool Water Mass
Cold Pool Mapping Requirements? …. flexible time/space water mass definitions
Timely Maps of the Cold Pool ? .… require glider data –assimilation ocean modeling
Forecasting MAB Cold Pool Disposition? …. within reach