We present a measurement of the angular power spectrum of the cosmic far-infrared background ( CFIRB ) anisotropies in one of the extragalactic fields of the Herschel Astrophysical Terahertz Large Area Survey ( H-ATLAS ) at 250 , 350 and 500 µm bands .
Consistent with recent measurements of the CFIRB power spectrum in Herschel -SPIRE maps , we confirm the existence of a clear one-halo term of galaxy clustering on arcminute angular scales with large-scale two-halo term of clustering at 30 arcminutes to angular scales of a few degrees .
The power spectrum at the largest angular scales , especially at 250 \mu m , is contaminated by the Galactic cirrus .
The angular power spectrum is modeled using a conditional luminosity function approach to describe the spatial distribution of unresolved galaxies that make up the bulk of the CFIRB .
Integrating over the dusty galaxy population responsible for the background anisotropies , we find that the cosmic abundance of dust , relative to the critical density , to be between \Omega _ { dust } = 10 ^ { -6 } and 8 \times 10 ^ { -6 } in the redshift range z \sim 0 - 3 .
This dust abundance is consistent with estimates of the dust content in the Universe using quasar reddening and magnification measurements in the SDSS .