Radiative Effect of Clouds at Ny-Alesund, Svalbard, as Inferred from Ground-Based Remote Sensing Observations
For the first time, the cloud radiative effect (CRE) has been characterized for the Arctic site Ny-Alesund, Svalbard, Norway, including more than 2 years of data (June 2016-September 2018). The cloud radiative effect, that is, the difference between the all-sky and equivalent clear-sky net radiative...
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ftubkoeln:oai:USBKOELN.ub.uni-koeln.de:35255 2023-05-15T13:11:58+02:00 Radiative Effect of Clouds at Ny-Alesund, Svalbard, as Inferred from Ground-Based Remote Sensing Observations Ebell, Kerstin Nomokonova, Tatiana Maturilli, Marion Ritter, Christoph 2020 https://kups.ub.uni-koeln.de/35255/ eng eng AMER METEOROLOGICAL SOC Ebell, Kerstin, Nomokonova, Tatiana, Maturilli, Marion and Ritter, Christoph (2020). Radiative Effect of Clouds at Ny-Alesund, Svalbard, as Inferred from Ground-Based Remote Sensing Observations. J. Appl. Meteorol. Climatol., 59 (1). S. 3 - 23. BOSTON: AMER METEOROLOGICAL SOC. ISSN 1558-8432 ddc:no doc-type:article publishedVersion 2020 ftubkoeln 2022-11-09T07:24:58Z For the first time, the cloud radiative effect (CRE) has been characterized for the Arctic site Ny-Alesund, Svalbard, Norway, including more than 2 years of data (June 2016-September 2018). The cloud radiative effect, that is, the difference between the all-sky and equivalent clear-sky net radiative fluxes, has been derived based on a combination of ground-based remote sensing observations of cloud properties and the application of broadband radiative transfer simulations. The simulated fluxes have been evaluated in terms of a radiative closure study. Good agreement with observed surface net shortwave (SW) and longwave (LW) fluxes has been found, with small biases for clear-sky (SW: 3.8 W m(-2); LW: -4.9 W m(-2)) and all-sky (SW: -5.4 W m(-2); LW: -0.2 W m(-2)) situations. For monthly averages, uncertainties in the CRE are estimated to be small (similar to 2 W m(-2)). At Ny-Alesund, the monthly net surface CRE is positive from September to April/May and negative in summer. The annual surface warming effect by clouds is 11.1 W m(-2). The longwave surface CRE of liquid-containing cloud is mainly driven by liquid water path (LWP) with an asymptote value of 75 W m(-2) for large LWP values. The shortwave surface CRE can largely be explained by LWP, solar zenith angle, and surface albedo. Liquid-containing clouds (LWP > 5 g m(-2)) clearly contribute most to the shortwave surface CRE (70%-98%) and, from late spring to autumn, also to the longwave surface CRE (up to 95%). Only in winter are ice clouds (IWP > 0 g m(-2); LWP < 5 g m(-2)) equally important or even dominating the signal in the longwave surface CRE. Article in Journal/Newspaper albedo Arctic Svalbard Cologne University: KUPS Arctic Norway Svalbard |
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Open Polar |
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Cologne University: KUPS |
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ftubkoeln |
language |
English |
topic |
ddc:no |
spellingShingle |
ddc:no Ebell, Kerstin Nomokonova, Tatiana Maturilli, Marion Ritter, Christoph Radiative Effect of Clouds at Ny-Alesund, Svalbard, as Inferred from Ground-Based Remote Sensing Observations |
topic_facet |
ddc:no |
description |
For the first time, the cloud radiative effect (CRE) has been characterized for the Arctic site Ny-Alesund, Svalbard, Norway, including more than 2 years of data (June 2016-September 2018). The cloud radiative effect, that is, the difference between the all-sky and equivalent clear-sky net radiative fluxes, has been derived based on a combination of ground-based remote sensing observations of cloud properties and the application of broadband radiative transfer simulations. The simulated fluxes have been evaluated in terms of a radiative closure study. Good agreement with observed surface net shortwave (SW) and longwave (LW) fluxes has been found, with small biases for clear-sky (SW: 3.8 W m(-2); LW: -4.9 W m(-2)) and all-sky (SW: -5.4 W m(-2); LW: -0.2 W m(-2)) situations. For monthly averages, uncertainties in the CRE are estimated to be small (similar to 2 W m(-2)). At Ny-Alesund, the monthly net surface CRE is positive from September to April/May and negative in summer. The annual surface warming effect by clouds is 11.1 W m(-2). The longwave surface CRE of liquid-containing cloud is mainly driven by liquid water path (LWP) with an asymptote value of 75 W m(-2) for large LWP values. The shortwave surface CRE can largely be explained by LWP, solar zenith angle, and surface albedo. Liquid-containing clouds (LWP > 5 g m(-2)) clearly contribute most to the shortwave surface CRE (70%-98%) and, from late spring to autumn, also to the longwave surface CRE (up to 95%). Only in winter are ice clouds (IWP > 0 g m(-2); LWP < 5 g m(-2)) equally important or even dominating the signal in the longwave surface CRE. |
format |
Article in Journal/Newspaper |
author |
Ebell, Kerstin Nomokonova, Tatiana Maturilli, Marion Ritter, Christoph |
author_facet |
Ebell, Kerstin Nomokonova, Tatiana Maturilli, Marion Ritter, Christoph |
author_sort |
Ebell, Kerstin |
title |
Radiative Effect of Clouds at Ny-Alesund, Svalbard, as Inferred from Ground-Based Remote Sensing Observations |
title_short |
Radiative Effect of Clouds at Ny-Alesund, Svalbard, as Inferred from Ground-Based Remote Sensing Observations |
title_full |
Radiative Effect of Clouds at Ny-Alesund, Svalbard, as Inferred from Ground-Based Remote Sensing Observations |
title_fullStr |
Radiative Effect of Clouds at Ny-Alesund, Svalbard, as Inferred from Ground-Based Remote Sensing Observations |
title_full_unstemmed |
Radiative Effect of Clouds at Ny-Alesund, Svalbard, as Inferred from Ground-Based Remote Sensing Observations |
title_sort |
radiative effect of clouds at ny-alesund, svalbard, as inferred from ground-based remote sensing observations |
publisher |
AMER METEOROLOGICAL SOC |
publishDate |
2020 |
url |
https://kups.ub.uni-koeln.de/35255/ |
geographic |
Arctic Norway Svalbard |
geographic_facet |
Arctic Norway Svalbard |
genre |
albedo Arctic Svalbard |
genre_facet |
albedo Arctic Svalbard |
op_relation |
Ebell, Kerstin, Nomokonova, Tatiana, Maturilli, Marion and Ritter, Christoph (2020). Radiative Effect of Clouds at Ny-Alesund, Svalbard, as Inferred from Ground-Based Remote Sensing Observations. J. Appl. Meteorol. Climatol., 59 (1). S. 3 - 23. BOSTON: AMER METEOROLOGICAL SOC. ISSN 1558-8432 |
_version_ |
1766249784288477184 |