cyndhiasamiah mb presentation

8/14/2019 CyndhiaSamiah MB Presentation

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There Is No Bloomin Bloom:There Is No Bloomin Bloom:ANALYSIS OF ALGAL PRE-BLOOMANALYSIS OF ALGAL PRE-BLOOM

PARAMETERSPARAMETERSIN MONTEREY BAY, CALIFORNIAIN MONTEREY BAY, CALIFORNIA

ON JULY 22ON JULY 22 ndnd AND 24AND 24 thth

Phytoplankton are the foundation of the marinefood chain and they can influence Earths climate.

SARP 2009Samiah Moustafa, UF 2011

Cyndhia Ramatchandirane, Wellesley 2011


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OutlineOutline

Introduction/Background Motivation Objectives

Methods Limitations Results Conclusions Acknowledgments


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Underwater terrain of Monterey Bay


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Objectives To validate MASTER data with in situ and

local M1 mooring data Determine favorable pre-bloom

conditions Determine potential bloom locations Explore/Determine correlations among

several parameters: Sea SurfaceTemperature (SST), salinity, chlorophyll,dissolved oxygen, nitrates


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MotivationMotivation

Coastal upwellingregions represent adisproportionatelylarge fraction of theoceans primaryproduction

Phytoplanktonrespond very rapidlyto changes in theirenvironment and canbe used as indicatorsof change (NASA EO)

Economicincentivefishery production

Affects health of marineecosystems andhumans

The increasedfrequency,


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Methods Remote sensing:

MASTER on DC-8 aircraft flyinglaboratory

In situ ocean sampling Local mooring M1SURF 20km

offshore Correlation analyses:

- Time series plots and parameter

graphs


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NASA DC-8 AircraftMASTER instrument (DC-8)

Moorings in Monterey BayData from M1 surf Station Ship Data from John Ryan at MBARI


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LimitationsLimitations M1 SURF station was the only

available mooring Lack of airborne data from MASTER

on July 24 th Variability in cloud cover and the

marine layer Scale measurement (17.7m pixel

resolution from MASTER while theship has a higher resolution but lessspatial coverage (


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Wind Speed over Monterey Bay, CA at 3:00 PM During July 22 nd , 24 th , and 28 th

July 22 nd July 24 th

July 28th


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July 22nd July 24th

MODIS Satellite Images


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SURFER Contour ImagesSURFER Contour Images

Chlorophyll Concentrations July 22nd Temperature July 22 nd

RESULTSRESULTS


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July 22 nd : MASTER thermal band and ship track overlay (white)Blue outline shows our Region of Interest (ROI) for chlorophyll,temperature, and salinity.


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Ship data exported & interpolated from Surfer onto ENVI (right) shows layers of warmer (light) and colder (dark) surface water. MASTER thermal band image(left) shows a similar layering effect

TEMPERATURE


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(Right) High chlorophyll concentration interpolated from ship data.

CHLOROPHYLL


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(Right) Highly layered salinity concentration interpolated from ship data.Possibly from upwelling. High salinity concentrations suggest increase in

nutrient content.

SALINITY

l 24 th


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July 24 th:Chlorophyllandtemperatureinterpolatedfrom ship data

CHLOROPHYLL

CHLOROPHYLL

TEMPERATURE


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July 24 th: Highchlorophyll versussalinity layering

CHLOROPHYLL

CHLOROPHYLL

SALINITY

SALINITY


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FLH bands 678. Red shows highest fluorescence. Red polygon isthe highest chlorophyll from ship data interpolated in surfer. FLHcalculated from expression by Letelier 2005.


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Close up view of surfer chlorophyll data from ship and FLH band 678.


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Conclusions

The surface winds we observed suggestupwelling

July 22 nd and July 24 th ENVI plots exhibit aregion of high chlorophyll and salinityconcentrations corresponding to SSTgradient pattern possibly due to upwelling

This region of interest was (potentially)

where the bloom was observed on July28 th Attempts at calculating chlorophyll

concentrations from the MASTER data

using FLH were inconclusive


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Acknowledgments


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References Gower, J. (2005).Detection of intense plankton blooms using the

709nm band of the MERIS imaging spectrometer. International Journal of Remote Sensing , 26(9) , [2005-2012].

Kudela, R. (2005). Harmful algal blooms in coastal upwellingsystems. Oceanography , 18(2) , [184-197].

Olivieri, R., & Chavez, F. (2000). A model of plankton dynamics forthe coastal upwelling system of Monterey Bay, California. Deep SeaResearch , 47 , [1077-1106].

Ryan, J. (2008). A coastal ocean extreme bloom incubator.Geophysical Research Letters , 35(L12602) , [1-5].

Ryan, J. (2005). Coastal ocean physics and red tides: an examplefrom Monterey Bay, California. Oceanography , 18(2) , [246-255].

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