The quote refers to our observation system which is inadequate to observe Earth's energy flows at the accuracy needed to
understand small fluctuations in climate; it does not mean there is no global warming, as is often interpreted by the likes of Danaher.
The bottom line is that true bumps, dips, and flat times punctuate the climate record, and need not be spurious in order to
understand them to be
fluctuations around a longer term trend, which for the past 100 years has been upward, with the years since 1950 well explained mainly by GHG - mediated forcing, plus a
smaller contribution from other factors.