Not exact matches
For the thirty - year period 1979 to 2009 (sometimes
updated through 2010 or 2011), the various
observational datasets find, in the tropical lower troposphere (LT, see Chapter 2 for definition), an average warming trend ranging from 0.07 °C to 0.15 °C per decade.
Observational climate
datasets are regularly
updated to include newly digitised historical paper records and improved analysis techniques.
It is difficult to digitise the Figure 8.18 values for years affected by volcanic eruptions, so I have also adjusted the widely - used RCP4.5 forcings
dataset to reflect the Section 7.5.3
observational estimate of current aerosol forcing, using Figure 8.18 and Table 8.7 data to
update the projected RCP4.5 forcings for 2007 — 2011 where appropriate.