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Title: Impact of decadal cloud variations on the Earth’s energy budget

Journal Article · · Nature Geoscience
DOI:https://doi.org/10.1038/ngeo2828· OSTI ID:1336997

Feedbacks of clouds on climate change strongly influence the magnitude of global warming. Cloud feedbacks, in turn, depend on the spatial patterns of surface warming, which vary on decadal timescales. Therefore, the magnitude of the decadal cloud feedback could deviate from the long-term cloud feedback. We present climate model simulations to show that the global mean cloud feedback in response to decadal temperature fluctuations varies dramatically due to time variations in the spatial pattern of sea surface temperature. Here, we find that cloud anomalies associated with these patterns significantly modify the Earth’s energy budget. Specifically, the decadal cloud feedback between the 1980s and 2000s is substantially more negative than the long-term cloud feedback. This is a result of cooling in tropical regions where air descends, relative to warming in tropical ascent regions, which strengthens low-level atmospheric stability. Under these conditions, low-level cloud cover and its reflection of solar radiation increase, despite an increase in global mean surface temperature. Our results suggest that sea surface temperature pattern-induced low cloud anomalies could have contributed to the period of reduced warming between 1998 and 2013, and o er a physical explanation of why climate sensitivities estimated from recently observed trends are probably biased low.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
1336997
Report Number(s):
LLNL-JRNL-692260
Journal Information:
Nature Geoscience, Vol. 9, Issue 12; ISSN 1752-0894
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 181 works
Citation information provided by
Web of Science

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Observational Constraints on Cloud Feedbacks: The Role of Active Satellite Sensors book January 2017
Low-Cloud Feedbacks from Cloud-Controlling Factors: A Review book May 2016
Reducing Uncertainties in Climate Projections with Emergent Constraints: Concepts, Examples and Prospects journal December 2019
What can decadal variability tell us about climate feedbacks and sensitivity? journal February 2018
Seasonally variant low cloud adjustment over cool oceans journal October 2018
A refined model for the Earth’s global energy balance journal May 2019
How accurately can the climate sensitivity to $$\hbox {CO}_{2}$$CO2 be estimated from historical climate change? journal October 2019
Probabilistic reasoning about measurements of equilibrium climate sensitivity: combining disparate lines of evidence journal November 2018
Observational Constraints on Cloud Feedbacks: The Role of Active Satellite Sensors journal November 2017
What Caused the Global Surface Warming Hiatus of 1998–2013? journal March 2017
Accounting for Changing Temperature Patterns Increases Historical Estimates of Climate Sensitivity journal August 2018
Uncertainty in the Evolution of Climate Feedback Traced to the Strength of the Atlantic Meridional Overturning Circulation journal November 2019
Observational Evidence for Two Modes of Coupling Between Sea Surface Temperatures, Tropospheric Temperature Profile, and Shortwave Cloud Radiative Effect in the Tropics journal August 2019
Dimensionality Reduction and Network Inference for Climate Data Using δ ‐MAPS: Application to the CESM Large Ensemble Sea Surface Temperature journal June 2019
Reconciling controversies about the ‘global warming hiatus’ journal May 2017
Energy budget constraints on climate sensitivity in light of inconstant climate feedbacks journal April 2017
Clearing clouds of uncertainty journal September 2017
Beyond equilibrium climate sensitivity journal September 2017
Emergent constraints on Earth’s transient and equilibrium response to doubled CO2 from post-1970s global warming journal October 2019
Analyzing changes in the complexity of climate in the last four decades using MERRA-2 radiation data journal January 2020
Relationship of tropospheric stability to climate sensitivity and Earth’s observed radiation budget journal November 2017
Climate variability from annual to multi-decadal timescales in a two-layer stochastic energy balance model: analytic solutions and implications for general circulation models journal January 2019
Toward reduction of the uncertainties in climate sensitivity due to cloud processes using a global non-hydrostatic atmospheric model journal October 2018
The influence of internal variability on Earth's energy balance framework and implications for estimating climate sensitivity journal January 2018
The climate of a retrograde rotating Earth journal January 2018
Low-Cloud Feedbacks from Cloud-Controlling Factors: A Review journal October 2017
A Relationship Between Blue and Near‐IR Global Spectral Reflectance and the Response of Global Average Reflectance to Change in Cloud Cover Observed From EPIC journal August 2019
An estimate of equilibrium climate sensitivity from interannual variability text January 2018
Sensitivity of liquid cloud optical thickness and effective radius retrievals to cloud bow and glory conditions using two SEVIRI imagers journal January 2019
Equilibrium Climate Sensitivity Obtained From Multimillennial Runs of Two GFDL Climate Models text January 2018
Beyond equilibrium climate sensitivity text January 2017
Decadal evolution of the surface energy budget during the fast warming and global warming hiatus periods in the ERA-interim journal May 2018