Quick question about the HadGEM2 global datasets contained in the directory HadGEM2/RF on the ICTP download site:

Last year (summer 2012), I downloaded data from 1979–2005. At the time, all 3-month files were the exact same size: 1.5 GB. Now, the files seem to be substantially smaller (~700 MB) and variable in size (by a few MB).

Could someone explain the difference between the new and old data files and how those differences might affect my simulations?

Thank you,