Texas and Louisiana Coastline Sensitivity and Oil Dispersion - - PowerPoint PPT Presentation

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Oct 10, 2022 283 likes •480 views

High Performance Research Computing Texas and Louisiana Coastline Sensitivity and Oil Dispersion Kristen Thyng, et al. Texas and Louisiana Coastline Sensitivity and Oil Dispersion Kristen Thyng and Robert Hetland Department of Oceanography,

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Texas and Louisiana Coastline Sensitivity and Oil Dispersion

– Kristen Thyng, et al.

High Performance Research Computing

SLIDE 2

Texas- Louisiana shelf model

500 m to 2 km horizontal resolution ROMS

Texas and Louisiana Coastline Sensitivity and Oil Dispersion

Kristen Thyng and Robert Hetland Department of Oceanography, Texas A&M University

SLIDE 3

Surface drifters to model tarball transport Drifters initialized with 1km spacing Colored with starting water depth Edge of river plume (33 psu) in black Drifter tails ~ 1 hour

Texas and Louisiana Coastline Sensitivity and Oil Dispersion

Kristen Thyng and Robert Hetland Department of Oceanography, Texas A&M University

SLIDE 4

Mean squared separation distance

At 3 days

Texas and Louisiana Coastline Sensitivity and Oil Dispersion

Kristen Thyng and Robert Hetland Department of Oceanography, Texas A&M University

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At 3 days

Winter dispersion near Port Aransas

Mean squared separation distance

Texas and Louisiana Coastline Sensitivity and Oil Dispersion

Kristen Thyng and Robert Hetland Department of Oceanography, Texas A&M University

SLIDE 6

Mean squared separation distance

At 3 days

Summer dispersion across broad shelf region

Texas and Louisiana Coastline Sensitivity and Oil Dispersion

Kristen Thyng and Robert Hetland Department of Oceanography, Texas A&M University

SLIDE 7

Dispersion: Model-data comparison

Texas and Louisiana Coastline Sensitivity and Oil Dispersion

Kristen Thyng and Robert Hetland Department of Oceanography, Texas A&M University

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Dispersion: Seasonal comparison

Texas and Louisiana Coastline Sensitivity and Oil Dispersion

Kristen Thyng and Robert Hetland Department of Oceanography, Texas A&M University

SLIDE 9

Dispersion: Seasonal comparison

Texas and Louisiana Coastline Sensitivity and Oil Dispersion

Kristen Thyng and Robert Hetland Department of Oceanography, Texas A&M University

SLIDE 10

Dispersion: Seasonal comparison

Texas and Louisiana Coastline Sensitivity and Oil Dispersion

Kristen Thyng and Robert Hetland Department of Oceanography, Texas A&M University

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GLAD data from Poje et al, PNAS 2014

Dispersion: GLAD comparison

Texas and Louisiana Coastline Sensitivity and Oil Dispersion

Kristen Thyng and Robert Hetland Department of Oceanography, Texas A&M University

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Wind Wind

Strength of Coastal Connection to Galveston

Texas and Louisiana Coastline Sensitivity and Oil Dispersion

Kristen Thyng and Robert Hetland Department of Oceanography, Texas A&M University

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Wind Wind

Strength of Coastal Connection to Port Aransas

Texas and Louisiana Coastline Sensitivity and Oil Dispersion

Kristen Thyng and Robert Hetland Department of Oceanography, Texas A&M University

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Winter connection to Galveston

Coincident winds: r2=0.76 +fall river discharge: r2=0.94

Wind more to north, more impact to

coast

More sensitivity to coincident wind

direction than Port Aransas

More fall river discharge, less impact

Texas and Louisiana Coastline Sensitivity and Oil Dispersion

Kristen Thyng and Robert Hetland Department of Oceanography, Texas A&M University

SLIDE 15

Winter connection to Galveston

Coincident winds: r2=0.76 +fall river discharge: r2=0.94

Wind more to north, more impact to

coast

More sensitivity to coincident wind

direction than Port Aransas

More fall river discharge, less impact

Texas and Louisiana Coastline Sensitivity and Oil Dispersion

Kristen Thyng and Robert Hetland Department of Oceanography, Texas A&M University

SLIDE 16

Wind more to north, more impact to

coast

Less sensitivity to coincident wind

direction than Galveston

More fall river discharge and stronger

fall wind, less impact

Coincident winds: r2=0.40 +fall river discharge and fall wind speed: r2=0.83

Winter connection to Port Aransas

Texas and Louisiana Coastline Sensitivity and Oil Dispersion

Kristen Thyng and Robert Hetland Department of Oceanography, Texas A&M University

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Summary

Shelf flow features strongly impact dispersion.
Shelf model reasonably captures behavior of dispersion

spatially and in time.

Detailed study of coastal regions can lead to quantitative

understanding of processes responsible for spill impact and related forcing mechanisms.

Texas and Louisiana Coastline Sensitivity and Oil Dispersion

Kristen Thyng and Robert Hetland Department of Oceanography, Texas A&M University

SLIDE 18

Data from LaCasce & Ohlmannn (2003), Journal of Marine Research

Texas and Louisiana Coastline Sensitivity and Oil Dispersion

Kristen Thyng and Robert Hetland Department of Oceanography, Texas A&M University