From the article: "But our analysis reveals that several observational datasets — particularly those with the smallest values of ocean surface warming and trop

From the article: "But our analysis reveals that several observational datasets — particularly those with the smallest values of ocean surface warming and tropospheric warming — appear to be at odds with other, independently measured complementary variables (e.g. tropical temperature and moisture)" Which suggests that unless all of the physics is wrong there could be anomalies in either the satellites or the ways its data is processed.