NASA Ice Surface Temperature Products

Product User Guide PI - Mark Tschudi (Univ of Colorado)
Product ATBD Co-Is: Dorothy HALL (NASA GSFC), George Riggs (SSAI GSFC)


Ice Surface Temperature

VIIRS IST

VNP30.A2014255.2110, 2110 UTC, 12 Sep
2014. IST map during fall freeze-up in the
Beaufort Sea.

The NASA VIIRS Ice Surface Temperature (IST) product provides surface temperatures retrieved at VIIRS moderate resolution for Arctic and Antarctic Sea Ice, for both day and night.

The NASA VIIRS IST algorithm uses a split window approach, which is similar to the MODIS IST algorithm, originally developed by Key and Haefliger [1992]:

IST = a + b(M15) + c(M15 - M16) + d[(M15 - M16)×(sec(θ)-1)]

where a, b, c and d are calibration coefficients, defined for temperature ranges where M15 < 240K, 240K < M15 < 260K, and M15 > 260K. The M15 and M16 temperatures are VIIRS top-of-atmosphere medium-resolution brightness temperatures, centered at 10.7µm and 12.0µm, respectively, and θ is the satellite zenith angle.

This approach provides for MODIS continuity. The different coefficients for the three temperature ranges account for differences in water vapor and provides greater ability to fine-tune the algorithm


 

Product Details and Links to NSIDC DAAC

Product Name Product ID
NPP/VIIRS Ice Surface Temperature 6-Min L2 Swath 750m VNP30
NPP/VIIRS Ice Surface Temperature Daily L3 Global 1km EASE-Grid Day VNP30P1D
NPP/VIIRS Ice Surface Temperature Daily L3 Global 1km EASE-Grid Night VNP30P1N
NPP/VIIRS Ice Surface Temperature Daily L3 Global 4km EASE-Grid Day VNP30E1D
NPP/VIIRS Ice Surface Temperature Daily L3 Global 4km EASE-Grid Night VNP30E1N

 

Ice Surface Temperature Validation Plans

The NASA VIIRS Ice Surface Temperature Product is being inter-compared with the MODIS IST and the JPSS VIIRS IST. The NASA VIIRS IST is being validated with IST retrieved during NASA IceBridge flights over Arctic and Antarctic sea ice. Further validation will include comparisons with near-surface temperatures retrieved from Arctic sea ice buoys, such as those deployed by the International Arctic Buoy Program.