Changes in Poleward Atmospheric Energy Transport over a Wide Range of Climates: Energetic and Diffusive Perspectives and A Priori TheoriesSource: Journal of Climate:;2022:;volume( 035 ):;issue: 020::page 2933DOI: 10.1175/JCLI-D-21-0682.1Publisher: American Meteorological Society
Abstract: The midlatitude poleward atmospheric energy transport increases in radiatively forced simulations of warmed climates across a range of models from comprehensive coupled general circulation models (GCMs) to idealized aquaplanet moist GCMs to diffusive moist energy balance models. These increases have been rationalized from two perspectives. The energetic (or radiative) perspective takes the atmospheric energy budget and decomposes energy flux changes (radiative forcing, feedbacks, or surface fluxes) to determine the energy transport changes required by the budget. The diffusive perspective takes the net effect of atmospheric macroturbulence to be a diffusive energy transport down-gradient, so transport changes can arise from changes in mean energy gradients or turbulent diffusivity. Here, we compare these perspectives in idealized moist, gray-radiation GCM simulations over a wide range of climates. The energetic perspective has a dominant role for radiative forcing in this GCM, with cancellation between the temperature feedback components that account for the GCM’s nonmonotonic energy transport changes in response to warming. Comprehensive CMIP5 simulations have similarities in the Northern Hemisphere to the idealized GCM, although a comprehensive GCM over several CO
|
Collections
Show full item record
contributor author | Timothy M. Merlis | |
contributor author | Nicole Feldl | |
contributor author | Rodrigo Caballero | |
date accessioned | 2023-04-12T18:36:26Z | |
date available | 2023-04-12T18:36:26Z | |
date copyright | 2022/09/22 | |
date issued | 2022 | |
identifier other | JCLI-D-21-0682.1.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl1/handle/yetl/4289958 | |
description abstract | The midlatitude poleward atmospheric energy transport increases in radiatively forced simulations of warmed climates across a range of models from comprehensive coupled general circulation models (GCMs) to idealized aquaplanet moist GCMs to diffusive moist energy balance models. These increases have been rationalized from two perspectives. The energetic (or radiative) perspective takes the atmospheric energy budget and decomposes energy flux changes (radiative forcing, feedbacks, or surface fluxes) to determine the energy transport changes required by the budget. The diffusive perspective takes the net effect of atmospheric macroturbulence to be a diffusive energy transport down-gradient, so transport changes can arise from changes in mean energy gradients or turbulent diffusivity. Here, we compare these perspectives in idealized moist, gray-radiation GCM simulations over a wide range of climates. The energetic perspective has a dominant role for radiative forcing in this GCM, with cancellation between the temperature feedback components that account for the GCM’s nonmonotonic energy transport changes in response to warming. Comprehensive CMIP5 simulations have similarities in the Northern Hemisphere to the idealized GCM, although a comprehensive GCM over several CO | |
publisher | American Meteorological Society | |
title | Changes in Poleward Atmospheric Energy Transport over a Wide Range of Climates: Energetic and Diffusive Perspectives and A Priori Theories | |
type | Journal Paper | |
journal volume | 35 | |
journal issue | 20 | |
journal title | Journal of Climate | |
identifier doi | 10.1175/JCLI-D-21-0682.1 | |
journal fristpage | 2933 | |
journal lastpage | 2948 | |
page | 2933–2948 | |
tree | Journal of Climate:;2022:;volume( 035 ):;issue: 020 | |
contenttype | Fulltext |