@article{Heyn:2017:10.1002/2016GL071975,
author = {Heyn, I and Block, K and Mülmenstädt, J and Gryspeerdt, ERI and Kühne, P and Salzmann, M and Quaas, J},
doi = {10.1002/2016GL071975},
journal = {Geophysical Research Letters},
pages = {1001--1007},
title = {Assessment of simulated aerosol effective radiative forcings in the terrestrial spectrum},
url = {http://dx.doi.org/10.1002/2016GL071975},
volume = {44},
year = {2017}
}

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TY  - JOUR
AB  - In its fifth assessment report (AR5), the Intergovernmental Panel on Climate Change provides a best estimate of the effective radiative forcing (ERF) due to anthropogenic aerosol at −0.9 W m−2. This value is considerably weaker than the estimate of −1.2 W m−2 in AR4. A part of the difference can be explained by an offset of +0.2 W m−2 which AR5 added to all published estimates that only considered the solar spectrum, in order to account for adjustments in the terrestrial spectrum. We find that, in the CMIP5 multimodel median, the ERF in the terrestrial spectrum is small, unless microphysical effects on ice- and mixed-phase clouds are parameterized. In the latter case it is large but accompanied by a very strong ERF in the solar spectrum. The total adjustments can be separated into microphysical adjustments (aerosol “effects”) and thermodynamic adjustments. Using a kernel technique, we quantify the latter and find that the rapid thermodynamic adjustments of water vapor and temperature profiles are small. Observation-based constraints on these model results are urgently needed.
AU  - Heyn,I
AU  - Block,K
AU  - Mülmenstädt,J
AU  - Gryspeerdt,ERI
AU  - Kühne,P
AU  - Salzmann,M
AU  - Quaas,J
DO  - 10.1002/2016GL071975
EP  - 1007
PY  - 2017///
SN  - 1944-8007
SP  - 1001
TI  - Assessment of simulated aerosol effective radiative forcings in the terrestrial spectrum
T2  - Geophysical Research Letters
UR  - http://dx.doi.org/10.1002/2016GL071975
UR  - http://hdl.handle.net/10044/1/43885
VL  - 44
ER  - 

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