TY - JOUR
T1 - Drivers of Global Clear Sky Surface Downwelling Longwave Irradiance Trends From 1984 to 2017
AU - Clark, J. P.
AU - Clothiaux, E. E.
AU - Feldstein, S. B.
AU - Lee, S.
N1 - Funding Information:
Computations for this research were performed on the Pennsylvania State University's Institute for Computational and Data Sciences' Roar supercomputer. The authors thank two anonymous reviewers for their helpful comments. This manuscript benefitted from weekly research discussions that included M. Park, D. Wan Kim, C. Milcarek, C. Baggett, and A. Mewhinney. This manuscript also benefitted from a conversation with Dr. Nadir Jeevanjee (Geophysical Fluid Dynamics Laboratory), who provided helpful references. This study was supported by National Science Foundation grants OPP‐1723832 and AGS‐1822015. Though not directly supported by the NASA Radiation Sciences and Department of Energy Atmospheric Radiation Measurement Programs at this time, E. Clothiaux's contributions to this study benefitted from prior support provided by these programs.
Funding Information:
Computations for this research were performed on the Pennsylvania State University's Institute for Computational and Data Sciences' Roar supercomputer. The authors thank two anonymous reviewers for their helpful comments. This manuscript benefitted from weekly research discussions that included M. Park, D. Wan Kim, C. Milcarek, C. Baggett, and A. Mewhinney. This manuscript also benefitted from a conversation with Dr. Nadir Jeevanjee (Geophysical Fluid Dynamics Laboratory), who provided helpful references. This study was supported by National Science Foundation grants OPP-1723832 and AGS-1822015. Though not directly supported by the NASA Radiation Sciences and Department of Energy Atmospheric Radiation Measurement Programs at this time, E. Clothiaux's contributions to this study benefitted from prior support provided by these programs.
Publisher Copyright:
© 2021. American Geophysical Union. All Rights Reserved.
PY - 2021/11/28
Y1 - 2021/11/28
N2 - Radiation changes at the Earth's surface alter climate, however, the causes of observed surface radiation changes are not precisely quantified globally. With complete global coverage by ERA-Interim, the drivers of the clear sky surface downwelling longwave irradiance (SDLI) trends from 1984 to 2017 are quantifiable everywhere. Trends in atmospheric temperature and water vapor contributed significantly (∼90%) to clear sky SDLI trends, including trends consistent with Arctic warming and Southern Ocean cooling. CO2 contributed ∼10% and other greenhouse gases (CH4, N2O, CFC-11, and CFC-12) ∼1% to the SDLI trends. These observation-based results are consistent with early CO2-doubling climate model calculations wherein temperature and water vapor changes drove ∼90% of the SDLI change. The well-mixed greenhouse gases drive location-dependent SDLI trends that are strongest over regions with climatologically high temperatures and low water vapor amounts.
AB - Radiation changes at the Earth's surface alter climate, however, the causes of observed surface radiation changes are not precisely quantified globally. With complete global coverage by ERA-Interim, the drivers of the clear sky surface downwelling longwave irradiance (SDLI) trends from 1984 to 2017 are quantifiable everywhere. Trends in atmospheric temperature and water vapor contributed significantly (∼90%) to clear sky SDLI trends, including trends consistent with Arctic warming and Southern Ocean cooling. CO2 contributed ∼10% and other greenhouse gases (CH4, N2O, CFC-11, and CFC-12) ∼1% to the SDLI trends. These observation-based results are consistent with early CO2-doubling climate model calculations wherein temperature and water vapor changes drove ∼90% of the SDLI change. The well-mixed greenhouse gases drive location-dependent SDLI trends that are strongest over regions with climatologically high temperatures and low water vapor amounts.
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U2 - 10.1029/2021GL093961
DO - 10.1029/2021GL093961
M3 - Article
AN - SCOPUS:85120005041
SN - 0094-8276
VL - 48
JO - Geophysical Research Letters
JF - Geophysical Research Letters
IS - 22
M1 - e2021GL093961
ER -
