Post on 04-Jan-2016
transcript
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University of Maine, COSEE Ocean Systems, University of Washington, Woods Hole Oceanographic Institution, Bigelow Laboratory for Ocean Sciences
Ivona Cetinić, Carla Companion, Annette deCharon, Christy Herren, Eric D'Asaro, Craig Lee, Amala Mahadevan, Melissa Omand,
Mary Jane Perry, Nicole Poulton
NORTH ATLANTIC BLOOM 2008
WEBINAR SERIES
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The 2008 North Atlantic Bloom Experiment:Autonomous Sampling in a Lagrangian Frame Bloom Dynamics
Carbon cycle associated mechanisms
Climate change…
Early April Float and glider
deployment May
Process cruise June
Recover floats and gliders
4 cruises70 float-days340 glider-days100 channels of realtime
dataAlkire et al., in press
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Gliders- Survey around floats. Profile to 1000 m every 4-5 h.
Lagrangian FloatCycle within mixed layer. Profile to 250 m every 24-36 h.
R/V KnorrR/V SæmundssonExtensive biological and chemical measurements, calibration data, scale check
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Collaboration with Center for Ocean Sciences Education Excellence (COSEE) - Ocean Systems
To broadly disseminate results and contribute to the public’s understanding of ocean science, NAB08 participants collaborated with the COSEE - Ocean Systems
Identified five theme areas to fit a five-part webinar series
Invited/involved seven presenters from four institutions
Included efforts to make the series a connected story
Targeted audience: middle school and high school educators (both
formal and informal)
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NAB08 ………. a connected story
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Webinar
Presentation Concept
map Interactive
Q&A
Dataset
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Webinar - Concept map
Emphasizes key concepts and the connections between concepts
Relates specific topics to the “big picture”
Non-linear presentation that is adjustable to an audience’s prior knowledge
Numerous assets that can be linked to a specific “concept”
Provides a visual overview to orient an audience and help the presenter field questions
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Webinar
PresentationInteractive Q&A
Dataset
Source: NASA
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Webinar
Presentation
Interactive Q&ADataset
THE LAST GRAPH YOU SHOWED, YOU SUGGESTED THAT THE “DIPS” IN CHLOROPHYLL ON THAT GRAPH WERE DUE TO MIXING -BY STORMS- TAKING SOME OF THE ALGAE THAT WERE UP IN THE ‘MEASURED POINT’ IN THE WATER, I GUESS, - TAKING THEM OUT OF THAT AREA BECAUSE OF THE MIXING. IS THAT CORRECT?DID YOU USE SATELLITE IMAGERY TO
DETERMINE WHERE TO RELEASE THE FLOATS AND SEAGLIDERS IN ORDER TO GET THE BEST
DATA POSSIBLE? WHERE DO THESE PHYTOPLANKTON THAT ARE IN THE SPRING BLOOM GO OVER THE WINTER? IF THEY ALL DIE, ARE THERE SEEDS OR SOMETHING THAT ALLOW THEM TO COME BACK NEXT YEAR?
IS ANYTHING MEASURED IN THE NORTH ATLANTIC BLOOM EXPERIMENT BEING USED
TO IMPROVE CLIMATE MODELS? HOW CAN YOU APPLY ALL THIS DATA THAT WE’RE GETTING TO HELP THE AVERAGE PERSON? IS THAT A POSSIBILITY? IS THERE ANY OTHER STUDY THAT HAS BEEN
DONE IN ANY OTHER PART OF THE GLOBAL OCEAN THAT COULD BE USED IN A
CLASSROOM TO COMPARE WITH WHAT YOU ALL HAVE SEEN COMPARED TO WHAT
THEY’VE SEEN?
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Webinar
Presentation
Interactive Q&A
Dataset
Dataset contains (Excel): CTD Tools and Sensors Float Tools and Sensors Glossary CTD Dataset Float Dataset Example of Plots CTD Example of Plots Float
Related Data-Based Activity Growth & Loss (Exponentials) Mixed Layer Depth Temporal and Spatial Scales Phytoplankton Composition and
Nutrients Density and Deep Convection
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Webinar
Presentation
Interactive Q&A
DatasetPhysics of the bloom
by Amala Mahadevan and Melissa Omand (WHOI)
E0 (µmol photon / m^2 / s) 488Kd (1/m) 0.112µmax (1/d) 0.70Ek (µmol photon / m^2 / s) 67Chlorophyll concentration on day 1
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cast 2 cast 100Mixed layer depth 160 25Average light 27.2 163.7Growth rate 0.23 0.64
timeCast 2
environmental conditions
Cast 100 environmental
conditions1 0.1 0.12 0.1 0.23 0.2 0.44 0.2 0.75 0.3 1.36 0.3 2.47 0.4 4.68 0.5 8.89 0.6 16.6
What does this mean for the phytoplankton that live in the mixed layer? Knowing that phytoplankton cannot swim, but instead, drift and get mixed with the water, what will happen to the cells? (Recall Phytoplankton growth and light exercise). The phytoplankton growth rate increases with increasing sunlight exposure (irradiance). E0 is the amount of incident sunlight, Kd describes the attenuation of sunlight with depth, µmax is the maximum growth rate of the cells, Ek decribes the saturation of the growth vs irradiance. We can calculate the average light experienced by a phytoplankton cell in mixed layers of different depths. From this, we can estimate something about their likliehood of forming a bloom!
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0 200 400
Dep
th (m
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Ez (µmol photon / m^2 / s)
light
MLD cast 2
MLD cast 100
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0 2 4 6 8 10
Chlo
roph
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(mg
/m^3
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Time (days)
Cast 2 environmental conditions
Cast 100 environmental conditions
Light vs. depth Phytoplankton vs. time
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Outcomes 68 unique participants from
21 states (+ Canada, Iceland and Germany)
51 % educators, 31 % scientists/grad students
Average 28 participants/webinar high “return rate” – over 30%
attended three or more live webinars in the series.
Other metrics: Second (to home page) most
viewed page on the OS site (since the series began in July 2011)
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Outcomes – all materials archived @http://cosee.umaine.edu/programs/webinars/nab
Videos
Transcripts
Interactive concept maps
Assets (figures, photos, videos)
Dataset ( + video
walk-though)
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Outcomes (scientists perspective)
Source: COSEE-OS
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Thank you for your attention For more details, videos, transcripts and
dataset – @ COSEE-OS:http://cosee.umaine.edu/programs/webinars/nab
Complete NAB08 dataset @ BCO-DMO:http://osprey.bcodmo.org/project.cfm?flag=view&id=102&sortby=project
Funding graciously provided by:NSF