The vertical atmospheric structure of the partially glacierised Mittivakkat valley, southeast Greenland
Air temperature inversions, a situation in which atmospheric temperature increases with height, are key components of the Arctic planetary boundary layer. The present study investigates the spatial and temporal variations of temperature inversions over different surface types (rock, gravel, snow, ic...
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Online Access: | http://dx.doi.org/10.1017/jog.2022.120 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143022001204 |
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crcambridgeupr:10.1017/jog.2022.120 2024-05-12T08:00:06+00:00 The vertical atmospheric structure of the partially glacierised Mittivakkat valley, southeast Greenland Hansche, Iris Shahi, Sonika Abermann, Jakob Schöner, Wolfgang 2023 http://dx.doi.org/10.1017/jog.2022.120 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143022001204 en eng Cambridge University Press (CUP) http://creativecommons.org/licenses/by/4.0/ Journal of Glaciology volume 69, issue 277, page 1097-1108 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 2023 crcambridgeupr https://doi.org/10.1017/jog.2022.120 2024-04-18T06:54:40Z Air temperature inversions, a situation in which atmospheric temperature increases with height, are key components of the Arctic planetary boundary layer. The present study investigates the spatial and temporal variations of temperature inversions over different surface types (rock, gravel, snow, ice) along the Mittivakkat valley (southeast Greenland). For this purpose, 113 vertical profiles with high spatio-temporal resolution of air temperature and relative humidity were collected with unoccupied aerial vehicles (UAVs) during a 13-day field campaign in summer 2019. Air temperature inversions were present in 83% of the profiles, of which 24% were surface-based inversions and 76% were elevated inversions. The proglacial area covered with bare rock and gravel induces surface heating and convection during the day and, through interaction with local circulation patterns, leads to the frequent formation of elevated inversions. In contrast, the glacier surface itself acts as a persistent cooling surface and leads to the formation of surface-based inversions. A low-level fog layer that forms under the inversion layer may be causing non-linear vertical ablation gradients on Mittivakkat Gletsjer. Furthermore, we demonstrate that atmospheric measurements using UAVs can better capture small-scale processes than other products like radiosonde or modeled reanalysis data. Article in Journal/Newspaper Arctic glacier Greenland Journal of Glaciology Cambridge University Press Arctic Greenland Bare Rock ENVELOPE(-45.589,-45.589,-60.704,-60.704) Journal of Glaciology 1 12 |
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Open Polar |
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Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Earth-Surface Processes |
spellingShingle |
Earth-Surface Processes Hansche, Iris Shahi, Sonika Abermann, Jakob Schöner, Wolfgang The vertical atmospheric structure of the partially glacierised Mittivakkat valley, southeast Greenland |
topic_facet |
Earth-Surface Processes |
description |
Air temperature inversions, a situation in which atmospheric temperature increases with height, are key components of the Arctic planetary boundary layer. The present study investigates the spatial and temporal variations of temperature inversions over different surface types (rock, gravel, snow, ice) along the Mittivakkat valley (southeast Greenland). For this purpose, 113 vertical profiles with high spatio-temporal resolution of air temperature and relative humidity were collected with unoccupied aerial vehicles (UAVs) during a 13-day field campaign in summer 2019. Air temperature inversions were present in 83% of the profiles, of which 24% were surface-based inversions and 76% were elevated inversions. The proglacial area covered with bare rock and gravel induces surface heating and convection during the day and, through interaction with local circulation patterns, leads to the frequent formation of elevated inversions. In contrast, the glacier surface itself acts as a persistent cooling surface and leads to the formation of surface-based inversions. A low-level fog layer that forms under the inversion layer may be causing non-linear vertical ablation gradients on Mittivakkat Gletsjer. Furthermore, we demonstrate that atmospheric measurements using UAVs can better capture small-scale processes than other products like radiosonde or modeled reanalysis data. |
format |
Article in Journal/Newspaper |
author |
Hansche, Iris Shahi, Sonika Abermann, Jakob Schöner, Wolfgang |
author_facet |
Hansche, Iris Shahi, Sonika Abermann, Jakob Schöner, Wolfgang |
author_sort |
Hansche, Iris |
title |
The vertical atmospheric structure of the partially glacierised Mittivakkat valley, southeast Greenland |
title_short |
The vertical atmospheric structure of the partially glacierised Mittivakkat valley, southeast Greenland |
title_full |
The vertical atmospheric structure of the partially glacierised Mittivakkat valley, southeast Greenland |
title_fullStr |
The vertical atmospheric structure of the partially glacierised Mittivakkat valley, southeast Greenland |
title_full_unstemmed |
The vertical atmospheric structure of the partially glacierised Mittivakkat valley, southeast Greenland |
title_sort |
vertical atmospheric structure of the partially glacierised mittivakkat valley, southeast greenland |
publisher |
Cambridge University Press (CUP) |
publishDate |
2023 |
url |
http://dx.doi.org/10.1017/jog.2022.120 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143022001204 |
long_lat |
ENVELOPE(-45.589,-45.589,-60.704,-60.704) |
geographic |
Arctic Greenland Bare Rock |
geographic_facet |
Arctic Greenland Bare Rock |
genre |
Arctic glacier Greenland Journal of Glaciology |
genre_facet |
Arctic glacier Greenland Journal of Glaciology |
op_source |
Journal of Glaciology volume 69, issue 277, page 1097-1108 ISSN 0022-1430 1727-5652 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1017/jog.2022.120 |
container_title |
Journal of Glaciology |
container_start_page |
1 |
op_container_end_page |
12 |
_version_ |
1798841809495916544 |