In-Situ Observations Of Aerosol Hygroscopicity And Cloud Droplet Formation In Ny-Ålesund, Svalbard, During Fall 2019 And Spring 2020
The Arctic region suffers an extreme vulnerability to climate change, with an increase in surface air temperatures that have reached twice the global rate during several decades (McBean et al., 2005). The role of clouds, and in particular low-levels clouds and fog, in this arctic amplification by re...
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ftinfoscience:oai:infoscience.epfl.ch:291478 2023-05-15T14:56:41+02:00 In-Situ Observations Of Aerosol Hygroscopicity And Cloud Droplet Formation In Ny-Ålesund, Svalbard, During Fall 2019 And Spring 2020 Motos, Ghislain Georgakaki, Paraskevi Zieger, Paul Wieder, Jörg Lohmann, Ulrike Nenes, Athanasios 2022-01-28T12:06:30Z http://infoscience.epfl.ch/record/291478 unknown http://infoscience.epfl.ch/record/291478 http://infoscience.epfl.ch/record/291478 Text 2022 ftinfoscience 2023-02-13T23:08:28Z The Arctic region suffers an extreme vulnerability to climate change, with an increase in surface air temperatures that have reached twice the global rate during several decades (McBean et al., 2005). The role of clouds, and in particular low-levels clouds and fog, in this arctic amplification by regulating the energy transport from and to space has recently gained interest among the scientific community. The NASCENT 2019-2020 campaign (Ny-Ålesund AeroSol Cloud ExperimeNT) based in Ny-Ålesund, Svalbard (79º North) aimed at studying the microphysical and chemical properties of low-level clouds using measurements both at the sea level and at the Zeppelin station (475 m a.s.l.). First results using a scanning mobility particle sizer (SMPS) and a cloud condensation nuclei counter (CCNC) confirmed that aerosol concentrations in the range 10 < Dpart [nm] < 500 were approximatively 4-5 times higher during the months of Spring 2021 compared to those of Fall 2020. In addition, we found filterpack-derived values of the aerosol hygroscopic parameter κ around 0.7. Combined with temperature and pressure data, these results were used as input parameters for the Morales Betancourt and Nenes (2014) parameterization in order to investigate the susceptibility of droplet formation, which has recently been shown to be highly dependent on aerosol levels in European alpine valleys (Georgakaki et al., 2021). We found strong variations between the Fall to Winter months, known for pristine-like conditions, and the higher particle concentrations generally found in Spring, known as the arctic haze. Specifically, droplet formation was always limited by the low aerosol concentrations in Fall/Winter, whereas updraft-limited cloud formation occurred in Spring. Reviewing relevant literature tells that the relationship between the limiting droplet number concentration and the updraft velocity during NASCENT agrees with that of various locations worldwide, which tends to confirm the universality of this relationship. Georgakaki, P., ... Text Arctic Climate change Ny Ålesund Ny-Ålesund Svalbard EPFL Infoscience (Ecole Polytechnique Fédérale Lausanne) Arctic Morales ENVELOPE(-55.833,-55.833,-63.000,-63.000) Ny-Ålesund Svalbard |
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EPFL Infoscience (Ecole Polytechnique Fédérale Lausanne) |
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ftinfoscience |
language |
unknown |
description |
The Arctic region suffers an extreme vulnerability to climate change, with an increase in surface air temperatures that have reached twice the global rate during several decades (McBean et al., 2005). The role of clouds, and in particular low-levels clouds and fog, in this arctic amplification by regulating the energy transport from and to space has recently gained interest among the scientific community. The NASCENT 2019-2020 campaign (Ny-Ålesund AeroSol Cloud ExperimeNT) based in Ny-Ålesund, Svalbard (79º North) aimed at studying the microphysical and chemical properties of low-level clouds using measurements both at the sea level and at the Zeppelin station (475 m a.s.l.). First results using a scanning mobility particle sizer (SMPS) and a cloud condensation nuclei counter (CCNC) confirmed that aerosol concentrations in the range 10 < Dpart [nm] < 500 were approximatively 4-5 times higher during the months of Spring 2021 compared to those of Fall 2020. In addition, we found filterpack-derived values of the aerosol hygroscopic parameter κ around 0.7. Combined with temperature and pressure data, these results were used as input parameters for the Morales Betancourt and Nenes (2014) parameterization in order to investigate the susceptibility of droplet formation, which has recently been shown to be highly dependent on aerosol levels in European alpine valleys (Georgakaki et al., 2021). We found strong variations between the Fall to Winter months, known for pristine-like conditions, and the higher particle concentrations generally found in Spring, known as the arctic haze. Specifically, droplet formation was always limited by the low aerosol concentrations in Fall/Winter, whereas updraft-limited cloud formation occurred in Spring. Reviewing relevant literature tells that the relationship between the limiting droplet number concentration and the updraft velocity during NASCENT agrees with that of various locations worldwide, which tends to confirm the universality of this relationship. Georgakaki, P., ... |
format |
Text |
author |
Motos, Ghislain Georgakaki, Paraskevi Zieger, Paul Wieder, Jörg Lohmann, Ulrike Nenes, Athanasios |
spellingShingle |
Motos, Ghislain Georgakaki, Paraskevi Zieger, Paul Wieder, Jörg Lohmann, Ulrike Nenes, Athanasios In-Situ Observations Of Aerosol Hygroscopicity And Cloud Droplet Formation In Ny-Ålesund, Svalbard, During Fall 2019 And Spring 2020 |
author_facet |
Motos, Ghislain Georgakaki, Paraskevi Zieger, Paul Wieder, Jörg Lohmann, Ulrike Nenes, Athanasios |
author_sort |
Motos, Ghislain |
title |
In-Situ Observations Of Aerosol Hygroscopicity And Cloud Droplet Formation In Ny-Ålesund, Svalbard, During Fall 2019 And Spring 2020 |
title_short |
In-Situ Observations Of Aerosol Hygroscopicity And Cloud Droplet Formation In Ny-Ålesund, Svalbard, During Fall 2019 And Spring 2020 |
title_full |
In-Situ Observations Of Aerosol Hygroscopicity And Cloud Droplet Formation In Ny-Ålesund, Svalbard, During Fall 2019 And Spring 2020 |
title_fullStr |
In-Situ Observations Of Aerosol Hygroscopicity And Cloud Droplet Formation In Ny-Ålesund, Svalbard, During Fall 2019 And Spring 2020 |
title_full_unstemmed |
In-Situ Observations Of Aerosol Hygroscopicity And Cloud Droplet Formation In Ny-Ålesund, Svalbard, During Fall 2019 And Spring 2020 |
title_sort |
in-situ observations of aerosol hygroscopicity and cloud droplet formation in ny-ålesund, svalbard, during fall 2019 and spring 2020 |
publishDate |
2022 |
url |
http://infoscience.epfl.ch/record/291478 |
long_lat |
ENVELOPE(-55.833,-55.833,-63.000,-63.000) |
geographic |
Arctic Morales Ny-Ålesund Svalbard |
geographic_facet |
Arctic Morales Ny-Ålesund Svalbard |
genre |
Arctic Climate change Ny Ålesund Ny-Ålesund Svalbard |
genre_facet |
Arctic Climate change Ny Ålesund Ny-Ålesund Svalbard |
op_source |
http://infoscience.epfl.ch/record/291478 |
op_relation |
http://infoscience.epfl.ch/record/291478 |
_version_ |
1766328773643337728 |