Data Name (This will be the displayed title in Catalog)
Thermal Habitat Area
Indicator Name (as exists in ecodata)
thermal_habitat_area
Family (Which group is this indicator associated with?)
[X] Oceanographic
[X] Habitat
[ ] Lower trophic levels
[ ] Megafauna
[ ] Social
[ ] Economic
Data Description
Calculates the proportion of each EPU that exceeds temperature thresholds as a daily time series from 1993 – 2023
Introduction to Indicator (Please explain your indicator)
See "Thermal Habitat Persistence" for cell-based calculations. Many deep water benthic and demersal exhibit thermal preferences for metabolic, reproductive, and growth processes. Temperatures above these thermal presences may impair these processes. Two temperature thresholds (15 and 24 degrees C) were chosen based on cutoff points where demersal species are less commonly found. Thermal habitat area is calculated by identifying 1/12 degree cells within a given EPU that are greater than or equal to the temperature threshold then taking the sum of all cell areas. Data from 1993-01-01 to 2023-08-29 were obtained from the CMEMS' GLORYS12V1 global reanalysis product, and from 2023-08-30 to 2023-12-31 data were obtained from the CMEMS' PSY global forecasting product.
Key Results and Visualization
For each EPU, bottom temperature data were separate by depth bin (0-25m; 25m-100m; and >100m), as well as temperature threshold (>15C , >24C), and the proportion of each EPU exceeding these thresholds was calculated on a daily basis from 1993 to 2023. Overlayed time series of each year's proportional area shows that recent years have resulted in a increasing proportion of the MAB and GB mid-depths have experienced high temperatures. The 24C threshold is rarely seen in GB and GOM.
Implications
If a large proportion of species current habitat become thermally inhospitable, it can influence species productivity and in extreme cases cause mortality.
Spatial Scale
EPU
Temporal Scale
daily
Synthesis Theme
[X] Multiple System Drivers
[ ] Regime Shifts
[ ] Ecosystem Reorganization
Define Variables
Source: GLORYS (CMEM’s GLORYS12V1 global reanalysis bottom temperature) and PSY (CMEM’s PSY global forecast bottom temperature)
min.depth: minimum of depth band
max.depth: maximum of depth band
temp.threshold: cutoff temperature for thermal area calculations (all areas greater than or equal to this temperature)
area: area exceeding temperature threshold (m2)
area.prop: proportion of EPU area exceeding temperature threshold
jcaracappa1
commented
6 months ago
Primary Contact
joseph.caracappa@noaa.gov
Secondary Contact
No response
Data Name (This will be the displayed title in Catalog)
Thermal Habitat Area
Indicator Name (as exists in ecodata)
thermal_habitat_area
Family (Which group is this indicator associated with?)
Data Description
Calculates the proportion of each EPU that exceeds temperature thresholds as a daily time series from 1993 – 2023
Introduction to Indicator (Please explain your indicator)
See "Thermal Habitat Persistence" for cell-based calculations. Many deep water benthic and demersal exhibit thermal preferences for metabolic, reproductive, and growth processes. Temperatures above these thermal presences may impair these processes. Two temperature thresholds (15 and 24 degrees C) were chosen based on cutoff points where demersal species are less commonly found. Thermal habitat area is calculated by identifying 1/12 degree cells within a given EPU that are greater than or equal to the temperature threshold then taking the sum of all cell areas. Data from 1993-01-01 to 2023-08-29 were obtained from the CMEMS' GLORYS12V1 global reanalysis product, and from 2023-08-30 to 2023-12-31 data were obtained from the CMEMS' PSY global forecasting product.
Key Results and Visualization
For each EPU, bottom temperature data were separate by depth bin (0-25m; 25m-100m; and >100m), as well as temperature threshold (>15C , >24C), and the proportion of each EPU exceeding these thresholds was calculated on a daily basis from 1993 to 2023. Overlayed time series of each year's proportional area shows that recent years have resulted in a increasing proportion of the MAB and GB mid-depths have experienced high temperatures. The 24C threshold is rarely seen in GB and GOM.
Implications
If a large proportion of species current habitat become thermally inhospitable, it can influence species productivity and in extreme cases cause mortality.
Spatial Scale
EPU
Temporal Scale
daily
Synthesis Theme
Define Variables
Source: GLORYS (CMEM’s GLORYS12V1 global reanalysis bottom temperature) and PSY (CMEM’s PSY global forecast bottom temperature) min.depth: minimum of depth band max.depth: maximum of depth band temp.threshold: cutoff temperature for thermal area calculations (all areas greater than or equal to this temperature) area: area exceeding temperature threshold (m2) area.prop: proportion of EPU area exceeding temperature threshold
Indicator Category
If other, please specify indicator category
No response
Data Contributors
Joe Caracappa
Point(s) of Contact
joseph.caracappa@noaa.gov
Affiliation
NEFSC
Public Availability
Source data are publicly available.
Accessibility and Constraints
No response