I am currently trying to compare different datasets, trying to monitor Earth Energy Imbalance. I am comparing this quantity for ERA5 global monthly mean as the subtration between Incoming Shortwave Radiation and Outgoing Longwave Radiation and for CERES EBAF Ed 4.1. It appears that there is a sharp increase first in 2010 and then in mid 2012. I was wondering if you had any answer. Could it be due to new satellites (2011) ?
Thank you in advance,
- Earth Energy Imbalance difference
- EEI_ERA5_CERES_Quest.png (22.76 KiB) Not viewed yet
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The CERES EBAF record is consistent with records from individual CERES instruments on Terra (L1999), Aqua (L2002) and S-NPP (L2011). Likewise, 22 geostationary satellites have been used over the entire record. We do not think that the geostationary satellite changes are adding any trends to the record.
The discontinuities in 2010 and 2012 in the CERES-ERA5 difference plot provided are more likely due to changes in the observation system being assimilated in ERA5 and/or changes in the ERA5 itself.