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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 conceptsRelates specific topics to the “big picture”Non-linear presentation that is adjustable to an audience’s prior knowledgeNumerous 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&ADataset

Source: NASA

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Webinar

PresentationInteractive 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

PresentationInteractive Q&ADataset

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

PresentationInteractive Q&ADatasetPhysics 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

0.1

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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Ez (µmol photon / m^2 / s)

light

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MLD cast 100

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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