142726 - Measurements of cloud radiative effect across the Southern Ocean.pdf (6.46 MB)
Measurements of cloud radiative effect across the Southern Ocean (43° S–79° S, 63° E–158° W)
journal contribution
posted on 2023-05-20, 20:48 authored by Wang, H, Andrew KlekociukAndrew Klekociuk, John French, Simon AlexanderSimon Alexander, Warner, TA The surface radiation environment over the Southern Ocean within the region bound by 42.8° S to 78.7° S and 62.6° E to 157.7° W is summarised for three austral summers. This is done using ship-based measurements with the combination of downwelling radiation sensors and a cloud imager. We focus on characterising the cloud radiative effect (CRE) under a variety of conditions, comparing observations in the open ocean with those in the sea ice zone. For comparison with our observed data, we obtained surface data from the European Centre for Medium-Range Weather Forecasts fifth reanalysis (ERA5). We found that the daily average cloud fraction was slightly lower in ERA5 compared with the observations (0.71 and 0.75, respectively). ERA5 also showed positive biases in the shortwave radiation effect and a negative bias in the longwave radiation effect. The observed mean surface CRE of −164 ± 100 Wm−2 was more negative than the mean surface CRE for ERA5 of −101 W m−2.
History
Publication title
AtmosphereVolume
11Issue
9Article number
949Number
949Pagination
1-22ISSN
2073-4433Department/School
Institute for Marine and Antarctic StudiesPublisher
MDPIAGPlace of publication
SwitzerlandRights statement
Copyright 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).Repository Status
- Open