English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  A cloud-controlling factor perspective on the hemispheric asymmetry of extratropical cloud albedo

Blanco, J. E., Caballero, R., Datseris, G., Stevens, B., Bony, S., Hadas, O., et al. (2023). A cloud-controlling factor perspective on the hemispheric asymmetry of extratropical cloud albedo. Journal of Climate, 36, 1793-1804. doi:10.1175/JCLI-D-22-0410.1.

Item is

Files

show Files
hide Files
:
1520-0442-JCLI-D-22-0410.1.pdf (Publisher version), 2MB
Name:
1520-0442-JCLI-D-22-0410.1.pdf
Description:
-
OA-Status:
Miscellaneous
Visibility:
Public
MIME-Type / Checksum:
application/pdf / [MD5]
Technical Metadata:
Copyright Date:
2023
Copyright Info:
© AMS

Locators

show

Creators

show
hide
 Creators:
Blanco, Joaquín E.1, Author
Caballero, Rodrigo1, Author
Datseris, George2, Author                 
Stevens, Bjorn3, Author                 
Bony, Sandrine1, Author
Hadas, Or1, Author
Kaspi, Yohai1, Author
Affiliations:
1external, ou_persistent22              
2Global Circulation and Climate, Department Climate Physics, MPI for Meteorology, Max Planck Society, Bundesstraße 53, 20146 Hamburg, DE, ou_3001850              
3Director’s Research Group , Department Climate Physics, MPI for Meteorology, Max Planck Society, ou_913570              

Content

show
hide
Free keywords: -
 Abstract: The Northern and Southern Hemispheres reflect on average almost equal amounts of sunlight due to compensating hemispheric asymmetries in clear-sky and cloud albedo. Recent work indicates that the cloud albedo asymmetry is largely due to clouds in extratropical oceanic regions. Here, we investigate the proximate causes of this extratropical cloud albedo asymmetry using a cloud-controlling factor (CCF) approach. We develop a simple index that measures the skill of CCFs, either individually or in combination, in predicting the asymmetry. The index captures the contribution to the asymmetry due to interhemispheric differences in the probability distribution function of daily CCF values. Cloud albedo is quantified using daily MODIS satellite retrievals, and is related to range of CCFs derived from the ERA5 product. We find that sea surface temperature is the CCF that individually explains the largest fraction of the asymmetry, followed by surface wind. The asymmetry is predominantly due to low clouds, and our results are consistent with prior local-scale modeling work showing that marine boundary layer clouds become thicker and more extensive as surface wind increases and surface temperature cools. The asymmetry is consistent with large-scale control of storm-track intensity and surface winds by meridional temperature gradients: persistently cold and windy conditions in the Southern Hemisphere keep cloud albedo high year-round. Our results have important implications for global-scale cloud feedbacks and contribute to efforts to develop a theory for planetary albedo and its symmetry.

Details

show
hide
Language(s): eng - English
 Dates: 2022-12-062023-02-202023-03-15
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1175/JCLI-D-22-0410.1
BibTex Citekey: BlancoCaballeroEtAl2023
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Journal of Climate
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Boston MA, USA : American Meteorological Society
Pages: - Volume / Issue: 36 Sequence Number: - Start / End Page: 1793 - 1804 Identifier: -