The Relationship between Interannual and Long-Term Cloud Feedbacks

TitleThe Relationship between Interannual and Long-Term Cloud Feedbacks
Publication TypeJournal Article
Year of Publication2015
AuthorsZhou, Chen
JournalGeophysical Research Letters
Volume42
Abstract / Summary

Analyses of CMIP5 simulations suggest that climate models with more positive cloud feedback in response to interannual climate fluctuations also have more positive cloud feedback in response to long-term global warming. Ensemble mean vertical profiles of cloud change in response to interannual and long-term surface warming are similar, and the ensemble mean cloud feedback is positive on both timescales. However, the average long-term cloud feedback is smaller than the inter-annual cloud feedback, likely due to differences in surface warming pattern on the two timescales. Low cloud cover (LCC) change in response to interannual and long-term global surface warming is found to be well correlated across models, and explains over half of the covariance between interannual and long-term cloud feedback. The inter-model correlation of LCC across timescales likely results from model-specific sensitivities of LCC to sea surface warming.

DOI10.1002/2015GL066698
Journal: Geophysical Research Letters
Year of Publication: 2015
Volume: 42

Analyses of CMIP5 simulations suggest that climate models with more positive cloud feedback in response to interannual climate fluctuations also have more positive cloud feedback in response to long-term global warming. Ensemble mean vertical profiles of cloud change in response to interannual and long-term surface warming are similar, and the ensemble mean cloud feedback is positive on both timescales. However, the average long-term cloud feedback is smaller than the inter-annual cloud feedback, likely due to differences in surface warming pattern on the two timescales. Low cloud cover (LCC) change in response to interannual and long-term global surface warming is found to be well correlated across models, and explains over half of the covariance between interannual and long-term cloud feedback. The inter-model correlation of LCC across timescales likely results from model-specific sensitivities of LCC to sea surface warming.

DOI: 10.1002/2015GL066698
Citation:
Zhou, C.  2015.  "The Relationship between Interannual and Long-Term Cloud Feedbacks."  Geophysical Research Letters 42.  https://doi.org/10.1002/2015GL066698.