Impact of different definitions of clear-sky flux on the determination of longwave cloud radiative forcing: NICAM simulation results
Item
Title (Dublin Core)
Impact of different definitions of clear-sky flux on the determination of longwave cloud radiative forcing: NICAM simulation results
Description (Dublin Core)
Using one month of the cloud-resolving Nonhydrostatic Icosahedral Atmospheric Model (NICAM) simulations, we examined the impact of different definitions of clear-sky flux on the determination of longwave cloud radiative forcing (CRF). Because the satellite-like cloud-free composite preferentially samples drier conditions relative to the all-sky mean state, the conventional clear-sky flux calculation using the all-sky mean state in the model may represent a more humid atmospheric state in comparison to the cloud-free state. The drier bias is evident for the cloud-free composite in the NICAM simulations, causing an overestimation of the longwave CRF by about 10% compared to the NICAM simulated longwave CRF. Overall, water vapor contributions of up to 10% of the total longwave CRF should be taken account for making model-generated cloud forcing comparable to the satellite measurements.
Creator (Dublin Core)
Sohn, B. J.
Nakajima, T.
Satoh, M.
Jang, H.-S.
Date (Dublin Core)
2018-01-15
Type (Dublin Core)
Text
Format (Dublin Core)
application/pdf
Identifier (Dublin Core)
10.5194/acp-10-11641-2010
https://acp.copernicus.org/articles/10/11641/2010/
Source (Dublin Core)
eISSN: 1680-7324
Language (Dublin Core)
eng
