Characterization of snowfall estimated by in situ and ground-based remote-sensing observations at Terra Nova Bay, Victoria Land, Antarctica
AbstractKnowledge of the precipitation contribution to the Antarctic surface mass balance is essential for defining the ice-sheet contribution to sea-level rise. Observations of precipitation are sparse over Antarctica, due to harsh environmental conditions. Precipitation during the summer months (N...
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ftopenaccessrep:oai:zenodo.org:90487 2023-10-25T01:31:54+02:00 Characterization of snowfall estimated by in situ and ground-based remote-sensing observations at Terra Nova Bay, Victoria Land, Antarctica Claudio Scarchilli Massimo Frezzotti Adriano Antonelli Stefania Argentini Giuseppe Camporeale Luca Baldini Stefano Dolci Lorenzo De Silvestri Paolo Grigioni Alessandro Bracci Riccardo Schioppo Marco Proposito Virginia Ciardini Antonio Iaccarino Nicoletta Roberto 2020-10-01 https://www.openaccessrepository.it/record/90487 https://doi.org/10.1017/jog.2020.70 eng eng url:https://www.openaccessrepository.it/communities/itmirror https://www.openaccessrepository.it/record/90487 doi:10.1017/jog.2020.70 info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/4.0/ Rural Digital Europe European Geothermal Research and Innovation Search Engine NEANIAS Atmospheric Research Community Earth-Surface Processes info:eu-repo/semantics/article publication-article 2020 ftopenaccessrep https://doi.org/10.1017/jog.2020.70 2023-09-26T22:21:38Z AbstractKnowledge of the precipitation contribution to the Antarctic surface mass balance is essential for defining the ice-sheet contribution to sea-level rise. Observations of precipitation are sparse over Antarctica, due to harsh environmental conditions. Precipitation during the summer months (November–December–January) on four expeditions, 2015–16, 2016–17, 2017–18 and 2018–19, in the Terra Nova Bay area, were monitored using a vertically pointing radar, disdrometer, snow gauge, radiosounding and an automatic weather station installed at the Italian Mario Zucchelli Station. The relationship between radar reflectivity and precipitation rate at the site can be estimated using these instruments jointly. The error in calculated precipitation is up to 40%, mostly dependent on reflectivity variability and disdrometer inability to define the real particle fall velocity. Mean derived summer precipitation is ~55 mm water equivalent but with a large variability. During collocated measurements in 2018–19, corrected snow gauge amounts agree with those derived from the relationship, within the estimated errors. European Centre for the Medium-Range Weather Forecasts (ECMWF) and the Antarctic Mesoscale Prediction System (AMPS) analysis and operational outputs are able to forecast the precipitation timing but do not adequately reproduce quantities during the most intense events, with overestimation for ECMWF and underestimation for AMPS. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Sheet Victoria Land Istituto Nazionale di Fisica Nucleare (INFN): Open Access Repository Antarctic Mario Zucchelli ENVELOPE(164.123,164.123,-74.695,-74.695) Mario Zucchelli Station ENVELOPE(164.117,164.117,-74.700,-74.700) Terra Nova Bay The Antarctic Victoria Land Journal of Glaciology 66 260 1006 1023 |
institution |
Open Polar |
collection |
Istituto Nazionale di Fisica Nucleare (INFN): Open Access Repository |
op_collection_id |
ftopenaccessrep |
language |
English |
topic |
Rural Digital Europe European Geothermal Research and Innovation Search Engine NEANIAS Atmospheric Research Community Earth-Surface Processes |
spellingShingle |
Rural Digital Europe European Geothermal Research and Innovation Search Engine NEANIAS Atmospheric Research Community Earth-Surface Processes Claudio Scarchilli Massimo Frezzotti Adriano Antonelli Stefania Argentini Giuseppe Camporeale Luca Baldini Stefano Dolci Lorenzo De Silvestri Paolo Grigioni Alessandro Bracci Riccardo Schioppo Marco Proposito Virginia Ciardini Antonio Iaccarino Nicoletta Roberto Characterization of snowfall estimated by in situ and ground-based remote-sensing observations at Terra Nova Bay, Victoria Land, Antarctica |
topic_facet |
Rural Digital Europe European Geothermal Research and Innovation Search Engine NEANIAS Atmospheric Research Community Earth-Surface Processes |
description |
AbstractKnowledge of the precipitation contribution to the Antarctic surface mass balance is essential for defining the ice-sheet contribution to sea-level rise. Observations of precipitation are sparse over Antarctica, due to harsh environmental conditions. Precipitation during the summer months (November–December–January) on four expeditions, 2015–16, 2016–17, 2017–18 and 2018–19, in the Terra Nova Bay area, were monitored using a vertically pointing radar, disdrometer, snow gauge, radiosounding and an automatic weather station installed at the Italian Mario Zucchelli Station. The relationship between radar reflectivity and precipitation rate at the site can be estimated using these instruments jointly. The error in calculated precipitation is up to 40%, mostly dependent on reflectivity variability and disdrometer inability to define the real particle fall velocity. Mean derived summer precipitation is ~55 mm water equivalent but with a large variability. During collocated measurements in 2018–19, corrected snow gauge amounts agree with those derived from the relationship, within the estimated errors. European Centre for the Medium-Range Weather Forecasts (ECMWF) and the Antarctic Mesoscale Prediction System (AMPS) analysis and operational outputs are able to forecast the precipitation timing but do not adequately reproduce quantities during the most intense events, with overestimation for ECMWF and underestimation for AMPS. |
format |
Article in Journal/Newspaper |
author |
Claudio Scarchilli Massimo Frezzotti Adriano Antonelli Stefania Argentini Giuseppe Camporeale Luca Baldini Stefano Dolci Lorenzo De Silvestri Paolo Grigioni Alessandro Bracci Riccardo Schioppo Marco Proposito Virginia Ciardini Antonio Iaccarino Nicoletta Roberto |
author_facet |
Claudio Scarchilli Massimo Frezzotti Adriano Antonelli Stefania Argentini Giuseppe Camporeale Luca Baldini Stefano Dolci Lorenzo De Silvestri Paolo Grigioni Alessandro Bracci Riccardo Schioppo Marco Proposito Virginia Ciardini Antonio Iaccarino Nicoletta Roberto |
author_sort |
Claudio Scarchilli |
title |
Characterization of snowfall estimated by in situ and ground-based remote-sensing observations at Terra Nova Bay, Victoria Land, Antarctica |
title_short |
Characterization of snowfall estimated by in situ and ground-based remote-sensing observations at Terra Nova Bay, Victoria Land, Antarctica |
title_full |
Characterization of snowfall estimated by in situ and ground-based remote-sensing observations at Terra Nova Bay, Victoria Land, Antarctica |
title_fullStr |
Characterization of snowfall estimated by in situ and ground-based remote-sensing observations at Terra Nova Bay, Victoria Land, Antarctica |
title_full_unstemmed |
Characterization of snowfall estimated by in situ and ground-based remote-sensing observations at Terra Nova Bay, Victoria Land, Antarctica |
title_sort |
characterization of snowfall estimated by in situ and ground-based remote-sensing observations at terra nova bay, victoria land, antarctica |
publishDate |
2020 |
url |
https://www.openaccessrepository.it/record/90487 https://doi.org/10.1017/jog.2020.70 |
long_lat |
ENVELOPE(164.123,164.123,-74.695,-74.695) ENVELOPE(164.117,164.117,-74.700,-74.700) |
geographic |
Antarctic Mario Zucchelli Mario Zucchelli Station Terra Nova Bay The Antarctic Victoria Land |
geographic_facet |
Antarctic Mario Zucchelli Mario Zucchelli Station Terra Nova Bay The Antarctic Victoria Land |
genre |
Antarc* Antarctic Antarctica Ice Sheet Victoria Land |
genre_facet |
Antarc* Antarctic Antarctica Ice Sheet Victoria Land |
op_relation |
url:https://www.openaccessrepository.it/communities/itmirror https://www.openaccessrepository.it/record/90487 doi:10.1017/jog.2020.70 |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1017/jog.2020.70 |
container_title |
Journal of Glaciology |
container_volume |
66 |
container_issue |
260 |
container_start_page |
1006 |
op_container_end_page |
1023 |
_version_ |
1780727444902248448 |