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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.

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Presentation on theme: "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."— Presentation transcript:

1 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 Glider Cold Pool Mapping – Glider Fleet MTS/IEEE OCEANS’15 Presentation 21 October 2015 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 Glider Cold Pool Mapping – Glider Fleet MTS/IEEE OCEANS’15 Presentation 21 October 2015

2 Mid Atlantic Bight (MAB) COLD POOL Ou & Houghton, 1982NOAA/NMFS 1979 Survey Bottom Temperatures Remnant winter water … i solated by springtime surface warming/freshening => Cold Pool HISTORICAL EVIDENCE.. fed by cold water early summer

3 Mid Atlantic Bight (MAB) COLD POOL Ou & Houghton, 1982NOAA/NMFS 1979 Survey Bottom Temperatures Remnant winter water … i solated by springtime surface warming/freshening => Cold Pool HISTORICAL EVIDENCE.. fed by cold water early summer “coldest patch”

4 Mid Atlantic Bight (MAB) COLD POOL HISTORICAL EVIDENCE.. fed by cold water early summer.. warmed during summer NOAA/NMFS 1979 Survey Bottom TemperaturesOu & Houghton, 1982 ~ 5 km/day

5 Mid Atlantic Bight (MAB) COLD POOL HISTORICAL EVIDENCE.. fed by cold water early summer.. warmed during summer NOAA/NMFS 1979 Survey Bottom TemperaturesOu & Houghton, 1982 ~ 5 km/day

6 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 ?

7 Measuring the MAB Cold Pool with Slocum Ocean Gliders

8 Mapping the 2007 Coastal Ocean ….with a ONE-GLIDER “Fleet “ May-Jun 2007 COLD POOL Established Late Spring – cooling !

9 Mapping the 2007 Coastal Ocean ….with a ONE-GLIDER “Fleet “ May-Jun 2007 COLD POOL Established Late Spring – cooling ! T min = 4.78

10 Mapping the 2007 Coastal Ocean ….with a ONE-GLIDER “Fleet “ May-Jun 2007 COLD POOL Established Late Spring – cooling ! T min = 5.32T min = 4.78

11 Mapping the 2007 Coastal Ocean ….with a ONE-GLIDER “Fleet “ May-Jun 2007 COLD POOL Established Late Spring – cooling ! T min = 5.32

12 Mapping the 2007 Coastal Ocean ….with a ONE-GLIDER “Fleet “ Jul-Aug 2007 COLD POOL Summer - warming T min = 5.60

13 Mapping the 2007 Coastal Ocean ….with a ONE-GLIDER “Fleet “ Sep – Oct 2007 COLD POOL 2007 Autumn - warming - erosion T min = 7.71 T min = 8.48

14 Mapping the 2007 Coastal Ocean ….with a ONE-GLIDER “Fleet “ Sep – Oct 2007 COLD POOL 2007 Autumn - warming - erosion T min = 7.71 T min = 8.48

15 Summary Mapping the 2007 Coastal Ocean ….with a ONE-GLIDER “Fleet “ Glider Transect T min … a proxy for Cold Pool temperature “ AprJunAugOct 1 2 6 8 4

16 Summary Mapping the 2007 Coastal Ocean ….with a ONE-GLIDER “Fleet “ T min vs. Time Cooling Phase AprJunAugOct 1 2 6 8 4 cooling

17 Summary Mapping the 2007 Coastal Ocean ….with a ONE-GLIDER “Fleet “ AprJunAugOct 1 2 6 8 4 warming T min vs. Time Warming Phase

18 Glider Fleet Measurements + Data Assimilation Models Mapping the 2013 Coastal Ocean ….with a GLIDER “Fleet “

19 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

20 ESPRESSO Bottom Temperature 27 May 2013 Wilkin et al., 2013 Cold Pool Array Design: Model Guidance

21 Mapping the 2013 Coastal Ocean ….with a GLIDER “Fleet “ Glider Transect T min

22 Mapping the Autumn 2013 COLD POOL ….with a glider pair 2 nd week September 3 rd week BLUE RU-23

23 Mapping the Autumn 2013 COLD POOL ….with a glider pair 2 nd week September 3 rd week BLUE RU-23

24 Mapping the Autumn 2013 COLD POOL ….with a glider pair 2 nd week September 3 rd week BLUE RU-23

25 with TEMPERATURE DEPARTURES TD = T – T min TD statistics suggest TD < 4.3 o C (1 σ) Defining COLD POOL WATER – 2007 T min vs S min Diagram

26 with TEMPERATURE DEPARTURES TD = T – T min TD statistics suggest TD < 4.3 o C (1 σ) T min vs S min Diagram Defining COLD POOL WATER – 2007

27 Mapping the mid-September 2013 COLD POOL in the SNEB

28 The inshore edges of the COLD POOL !

29 Mapping the mid-September 2013 COLD POOL in the SNEB The inshore edges of the COLD POOL !

30 The offshore edges of the COLD POOL ! Mapping the mid-September 2013 COLD POOL in the SNEB

31 Mapping the mid-September 2013 COLD POOL in the SW MAB

32 The inshore edges of the COLD POOL ! Mapping the mid-September 2013 COLD POOL in the SW MAB

33 The inshore edges of the COLD POOL ! Mapping the mid-September 2013 COLD POOL in the SW MAB

34 The offshore edge of the COLD POOL ! Mapping the mid-September 2013 COLD POOL in the SW MAB

35 offshore flow of the COLD POOL ? Mapping the mid-September 2013 COLD POOL in the SW MAB ? ?

36 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

37 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

38 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

39 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

40 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

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