Arbitrarily adjusting data after the fact allows one to squeeze whatever message one desires out of the numbers. This has zero to do with science. It is simply politics (to keep funding?). Arbitrary data adjustments are always suspect especially when they form the basis of claims by government agencies who have no external peer-review on their claims. Because a government agency has no external peer review on the claims they make, public disclosure of underlying data and documents is necessary to provide a measure of checks and balances and public verifiable accountability. When a government agency (e.g. NOAA) refuses to do so then it sends a clear message that there indeed is something to hid.
Read more at Wattsupwiththat: