Ocean Layers Notes

Tasks for Dec 4

Land/Sea Mask

Create land/sea mask at 0.5 degree xy resolution -- derived from Ecoclimate land mask. Longitudinal extent: -180 to 180 Latitudinal extent: -90 to 90 cell size = 0.5 degrees Geographic coordinate system Create 3 raster layers:

• a land/sea layer, where land pixels are 1 and ocean pixels are 0
• a land mask, where land is data and ocean is no data
• an ocean mask, where ocean is data and land is no data

Create "baseline climatology" from observed data

Using NOAA OI SST version 2 at 0.25 x 0.25 degree cell resolution from Jan 1, 1986 to Dec 31, 2005 (https://www.esrl.noaa.gov/psd/data/gridded/data.noaa.oisst.v2.highres.html)

• Download data and upload to ftp site.
• Generate Daily long-term means over period Jan 1, 1986 to Dec 31, 2005 (20-years)
• Regrid to 0.5 x 0.5 spatial resolution within ocean mask.
• Save as raster

Create "historical climatology" from model

• Download data and upload to ftp site (DONE)
• Generate daily long-term means over period Jan 1, 1986 to Dec 31, 2005 (20-years)
• Save as raster at native resolution

Extract future model projection for desired year and RCP scenario

• Download data and upload to ftp site (DONE)
• Extract daily tos data for each year of interest (2025, 2050, 2075, and 2100) and for each RCP scenario of interest (RCP 2.5, 4.5, 6.0, and 8.5)
• Save as rasters at native resolution

Rescale and regrid future model projections

• Calculate daily model anomalies as future SST minus historical climatology
• Interpolate anomalies within ocean mask to 0.5 x 0.5 degree resolution
• Save as raster stack

Generate heat stress variables

to be continued...