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Earth's energy imbalance since 1960 in observations and CMIP5 models
Observational analyses of running 5 year ocean heat content trends (H(t)) and net downward top of atmosphere radiation (N) are significantly correlated (r ∼ 0.6) from 1960 to 1999, but a spike in H(t) in the early 2000s is likely spurious since it is inconsistent with estimates of N from both satell...
Autores principales: | , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Blackwell Publishing Ltd
2015
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4459179/ https://www.ncbi.nlm.nih.gov/pubmed/26074649 http://dx.doi.org/10.1002/2014GL062669 |
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author | Smith, Doug M Allan, Richard P Coward, Andrew C Eade, Rosie Hyder, Patrick Liu, Chunlei Loeb, Norman G Palmer, Matthew D Roberts, Chris D Scaife, Adam A |
author_facet | Smith, Doug M Allan, Richard P Coward, Andrew C Eade, Rosie Hyder, Patrick Liu, Chunlei Loeb, Norman G Palmer, Matthew D Roberts, Chris D Scaife, Adam A |
author_sort | Smith, Doug M |
collection | PubMed |
description | Observational analyses of running 5 year ocean heat content trends (H(t)) and net downward top of atmosphere radiation (N) are significantly correlated (r ∼ 0.6) from 1960 to 1999, but a spike in H(t) in the early 2000s is likely spurious since it is inconsistent with estimates of N from both satellite observations and climate model simulations. Variations in N between 1960 and 2000 were dominated by volcanic eruptions and are well simulated by the ensemble mean of coupled models from the Fifth Coupled Model Intercomparison Project (CMIP5). We find an observation-based reduction in N of − 0.31 ± 0.21 W m(−2) between 1999 and 2005 that potentially contributed to the recent warming slowdown, but the relative roles of external forcing and internal variability remain unclear. While present-day anomalies of N in the CMIP5 ensemble mean and observations agree, this may be due to a cancelation of errors in outgoing longwave and absorbed solar radiation. KEY POINTS: Observed maximum in ocean heat content trend in early 2000s is likely spurious. Net incoming radiation (N) reduced by 0.31 ± 0.21 W m(−2) during the warming pause. Present-day estimates of N may contain opposing errors in radiative components; |
format | Online Article Text |
id | pubmed-4459179 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | Blackwell Publishing Ltd |
record_format | MEDLINE/PubMed |
spelling | pubmed-44591792015-06-12 Earth's energy imbalance since 1960 in observations and CMIP5 models Smith, Doug M Allan, Richard P Coward, Andrew C Eade, Rosie Hyder, Patrick Liu, Chunlei Loeb, Norman G Palmer, Matthew D Roberts, Chris D Scaife, Adam A Geophys Res Lett Research Letters Observational analyses of running 5 year ocean heat content trends (H(t)) and net downward top of atmosphere radiation (N) are significantly correlated (r ∼ 0.6) from 1960 to 1999, but a spike in H(t) in the early 2000s is likely spurious since it is inconsistent with estimates of N from both satellite observations and climate model simulations. Variations in N between 1960 and 2000 were dominated by volcanic eruptions and are well simulated by the ensemble mean of coupled models from the Fifth Coupled Model Intercomparison Project (CMIP5). We find an observation-based reduction in N of − 0.31 ± 0.21 W m(−2) between 1999 and 2005 that potentially contributed to the recent warming slowdown, but the relative roles of external forcing and internal variability remain unclear. While present-day anomalies of N in the CMIP5 ensemble mean and observations agree, this may be due to a cancelation of errors in outgoing longwave and absorbed solar radiation. KEY POINTS: Observed maximum in ocean heat content trend in early 2000s is likely spurious. Net incoming radiation (N) reduced by 0.31 ± 0.21 W m(−2) during the warming pause. Present-day estimates of N may contain opposing errors in radiative components; Blackwell Publishing Ltd 2015-02-28 2015-02-19 /pmc/articles/PMC4459179/ /pubmed/26074649 http://dx.doi.org/10.1002/2014GL062669 Text en ©2015 Crown copyright. Geophysical Research Letters published by Wiley, Inc., on behalf of the American Geophysical Union. This article is published with the permission of the Controller of HMSO and the Queen's Printer for Scotland. http://creativecommons.org/licenses/by-nc-nd/4.0/ This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made. |
spellingShingle | Research Letters Smith, Doug M Allan, Richard P Coward, Andrew C Eade, Rosie Hyder, Patrick Liu, Chunlei Loeb, Norman G Palmer, Matthew D Roberts, Chris D Scaife, Adam A Earth's energy imbalance since 1960 in observations and CMIP5 models |
title | Earth's energy imbalance since 1960 in observations and CMIP5 models |
title_full | Earth's energy imbalance since 1960 in observations and CMIP5 models |
title_fullStr | Earth's energy imbalance since 1960 in observations and CMIP5 models |
title_full_unstemmed | Earth's energy imbalance since 1960 in observations and CMIP5 models |
title_short | Earth's energy imbalance since 1960 in observations and CMIP5 models |
title_sort | earth's energy imbalance since 1960 in observations and cmip5 models |
topic | Research Letters |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4459179/ https://www.ncbi.nlm.nih.gov/pubmed/26074649 http://dx.doi.org/10.1002/2014GL062669 |
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