Post on 31-Jan-2021
transcript
Uniting Deep-Sea Coral with Geomorphology
Presentation by:Mark Kumler, PhD,Jason Greenstein, MS GIS Student University of Redlands
Deep-Sea Coral - Background
Photo Credit: NOAA Southwest Fisheries Science Center, Advanced Survey Technologies Group
Photo Credit: NOAA Okeanos Explorer Program, Gulf of Mexico 2012 Expedition
Photo Credit: NOAA Ocean Explorer
Photo Credit: NOAA and The National Undersea Research Center at the University of North Carolina, Wilmington
NOAA’s National Database for Deep-Sea Corals and Sponges
GEBCO, NOAA, ESRI and more
• Over 700,000 coral and sponge records• Available for the public to query and download
MethodsEnrich coral data with World Seafloor Geomorphology from GRID Arendal
• Seafloor feature categories are in accordance with International Hydrologic Organization (IHO) standards (Harris et al., 2014)
• Hosted by Esri in the Living Atlas
MethodsWorld Seafloor Geomorphology from GRID Arendal:Base Features
MethodsWorld Seafloor Geomorphology from GRID Arendal:Discrete Features (18 categories – most overlap one another)
rift valley rise seamount shelf valley sill spreading ridge terrace trench trough
basin bridge canyon escarpment fan guyot glacial trough plateau ridge
Image Credit: NOAA’s National Ocean Service
MethodsOverlapping Discrete Features
GEBCO, NOAA, ESRI and more
Escarpment & Fan & Rise & Ridge & Seamount
ResultsEscarpment & Rise & Ridge & Seamount
Escarpment & Rise & Ridge & Seamount
Coral Present Coral Presence Unknown
Classifying Slope ZonesFor the Eastern U.S. EEZ
MethodsTopographic Position Index (TPI) | From Weiss (2001)
Neighborhood analysis Compare elevation of target
cell to its neighbors
Elevation Profile
Elevation
Horizontal Distance
positive TPI
(i.e. hilltop)
negative TPI
(i.e. depression)
near zeroTPI
(float or constant slope)
MethodsFlow chart of slope zone classification scheme
• Bathymetry data source: GEBCO 2019
Topographic Position Index (TPI) Grids
2,300 m 4,500 m 12,000 m
23,000 m 46,000 m
Made from various neighborhood sizes
Slope Position Zones
2,300 m 4,500 m 12,000 m
23,000 m 46,000 m
Classified from TPI and Slope
Results – Slope Position Zones, Large Neighborhood
D. 23,000 mNeighborhood
• Continental margin is represented
• But, Canyon Edge has a large width
Results – Slope Position Zones, Small Neighborhood
B. 4,500 mNeighborhood
• Canyon Edge has an appropriate width
• But, continental margin is not represented off of the Carolinas
Conclusion• Deep Sea Coral and Sponge Database enriched with
standardized geomorphic features
• Slope position zones were classified in the Eastern U.S. EEZ
Photo Credit: NOAA Okeanos Explorer Program
Thank you
Jason Greensteinjason99g@gmail.com
Uniting Deep-Sea Coral with Geomorphology�Deep-Sea Coral - BackgroundSlide Number 3MethodsMethodsMethodsMethods�Escarpment & Fan & Rise & Ridge & Seamount Classifying Slope ZonesMethodsMethodsSlide Number 12Slide Number 13Slide Number 14Slide Number 15ConclusionThank you