Analysis of 10 years of Ceres Ebaf data S. Dewitte

Introduction Goal: Analyse long term series of earth radiation data Check if climate change can be detected Used data: Ceres EBAF March 2000 – February 2009: 10 years

Refelcted solar radiation

Emitted thermal radiation

Total outgoing radiation

Net incoming radiation

OLR

Change OLR: last 5 years – first 5 years

Yearly animation OLR

El Nino / La Nina years

Variation OLR: La Nina years – El Nino years

Long term variation ENSO strength

Conclusions Main mode of interannual variation OLR: El nino/ La nina oscillation, coupled global variation Change over last 10 years shows spatial pattern similar to La nina strengthening Consistent with average strengthening of La Nina over last 10 years This can not be taken as a sign of climate change, because strong La Nina's have already occured before 1980.