Fig. 13. Comparison of large-scale annual average time series from
HadISDH land specific humidity with land surface air temperature
from CRUTEM4 (Jones et al., 2012) and sea surface temperature
from HadSST3 (Kennedy et al., 2011a, b), including uncertainty
ranges. Temperature data have been adjusted to have a zero mean
over the 1976–2005 climatology period of HadISDH. Correlations
between the land air temperature and SST and land surface humidity
have been performed on the detrended time series.