CloudSat snowfall estimates over Antarctica and the Southern Ocean: An assessment of independent retrieval methodologies and multi-year snowfall analysis
CloudSat spaceborne radar snowfall retrievals using two different methodologies – the 2C-SNOW-PROFILE (2CSNOW) CloudSat product and the combined Kulie and Bennartz (2009) technique with the Hiley et al. (2011) reflectivity (Z) to snowfall rate (S) conversion (KBH) - are compared over Antarctica and...
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ftunibolognairis:oai:cris.unibo.it:11585/635344 2024-09-15T17:46:27+00:00 CloudSat snowfall estimates over Antarctica and the Southern Ocean: An assessment of independent retrieval methodologies and multi-year snowfall analysis L. Milani M. S. Kulie D. Casellaa S. Dietrich T. S. L’Ecuyer G. Panegrossi F. Porcù P. Sanò N. B. Wood L. Milani, M. S. Kulie, D. Casellaa, S. Dietrich, T. S. L’Ecuyer, G. Panegrossi, F. Porcù, P. Sanò, N. B. Wood 2018 STAMPA http://hdl.handle.net/11585/635344 https://doi.org/10.1016/j.atmosres.2018.05.015 https://www.sciencedirect.com/science/article/pii/S0169809517310682?via=ihub eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000442169800011 volume:213 firstpage:121 lastpage:135 numberofpages:15 journal:ATMOSPHERIC RESEARCH http://hdl.handle.net/11585/635344 doi:10.1016/j.atmosres.2018.05.015 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85048196576 https://www.sciencedirect.com/science/article/pii/S0169809517310682?via=ihub info:eu-repo/semantics/openAccess Antartica snowfall ice mass balance cloudsat info:eu-repo/semantics/article 2018 ftunibolognairis https://doi.org/10.1016/j.atmosres.2018.05.015 2024-07-08T14:06:47Z CloudSat spaceborne radar snowfall retrievals using two different methodologies – the 2C-SNOW-PROFILE (2CSNOW) CloudSat product and the combined Kulie and Bennartz (2009) technique with the Hiley et al. (2011) reflectivity (Z) to snowfall rate (S) conversion (KBH) - are compared over Antarctica and surrounding Southern Ocean environments. KBH algorithm sensitivity tests are performed to demonstrate how retrievals are affected by algorithm assumptions (e.g., vertical reflectivity continuity test, the choice of near surface bin used to make surface snowfall rate retrievals, and temperature filters). These algorithm components are found to be detrimental to snowfall detection over this region by significantly reducing the snowfall population compared to 2CSNOW, especially over ocean regions prone to ERA-interim indicated convective snow. After accounting for key algorithm differences, 2C-SNOW mean annual snowfall rates are systematically higher than KBH due to the Z-S relationship adopted. Spatial annual mean snowfall accumulation differences between the two datasets are minimized over interior Antarctica, but large differences are observed over the ocean. 2C-SNOW Z-S relationships for all snowfall events (Z=10.9 S1.3), over ocean and sea ice (Z=8.2 S1.3), escarpments and Antarctic coastal areas - below 2000ma.s.l. (Z=6.7 S1.4), and Antarctic plateau - above 2000ma.s.l. (Z=5.5 S1.6) are also derived. A multi-year 2C-SNOW mean annual snowfall analysis is also provided, and comparisons with ERAInterim snowfall datasets show similar spatial patterns, but magnitude differences over oceans are observed. A monthly 2C-SNOW and acoustic depth gauge analysis is provided to demonstrate qualitative trends in snowfall accumulation between the respective datasets. Article in Journal/Newspaper Antarc* Antarctic Antarctica antartic* Sea ice Southern Ocean IRIS Università degli Studi di Bologna (CRIS - Current Research Information System) Atmospheric Research 213 121 135 |
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Open Polar |
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IRIS Università degli Studi di Bologna (CRIS - Current Research Information System) |
op_collection_id |
ftunibolognairis |
language |
English |
topic |
Antartica snowfall ice mass balance cloudsat |
spellingShingle |
Antartica snowfall ice mass balance cloudsat L. Milani M. S. Kulie D. Casellaa S. Dietrich T. S. L’Ecuyer G. Panegrossi F. Porcù P. Sanò N. B. Wood CloudSat snowfall estimates over Antarctica and the Southern Ocean: An assessment of independent retrieval methodologies and multi-year snowfall analysis |
topic_facet |
Antartica snowfall ice mass balance cloudsat |
description |
CloudSat spaceborne radar snowfall retrievals using two different methodologies – the 2C-SNOW-PROFILE (2CSNOW) CloudSat product and the combined Kulie and Bennartz (2009) technique with the Hiley et al. (2011) reflectivity (Z) to snowfall rate (S) conversion (KBH) - are compared over Antarctica and surrounding Southern Ocean environments. KBH algorithm sensitivity tests are performed to demonstrate how retrievals are affected by algorithm assumptions (e.g., vertical reflectivity continuity test, the choice of near surface bin used to make surface snowfall rate retrievals, and temperature filters). These algorithm components are found to be detrimental to snowfall detection over this region by significantly reducing the snowfall population compared to 2CSNOW, especially over ocean regions prone to ERA-interim indicated convective snow. After accounting for key algorithm differences, 2C-SNOW mean annual snowfall rates are systematically higher than KBH due to the Z-S relationship adopted. Spatial annual mean snowfall accumulation differences between the two datasets are minimized over interior Antarctica, but large differences are observed over the ocean. 2C-SNOW Z-S relationships for all snowfall events (Z=10.9 S1.3), over ocean and sea ice (Z=8.2 S1.3), escarpments and Antarctic coastal areas - below 2000ma.s.l. (Z=6.7 S1.4), and Antarctic plateau - above 2000ma.s.l. (Z=5.5 S1.6) are also derived. A multi-year 2C-SNOW mean annual snowfall analysis is also provided, and comparisons with ERAInterim snowfall datasets show similar spatial patterns, but magnitude differences over oceans are observed. A monthly 2C-SNOW and acoustic depth gauge analysis is provided to demonstrate qualitative trends in snowfall accumulation between the respective datasets. |
author2 |
L. Milani, M. S. Kulie, D. Casellaa, S. Dietrich, T. S. L’Ecuyer, G. Panegrossi, F. Porcù, P. Sanò, N. B. Wood |
format |
Article in Journal/Newspaper |
author |
L. Milani M. S. Kulie D. Casellaa S. Dietrich T. S. L’Ecuyer G. Panegrossi F. Porcù P. Sanò N. B. Wood |
author_facet |
L. Milani M. S. Kulie D. Casellaa S. Dietrich T. S. L’Ecuyer G. Panegrossi F. Porcù P. Sanò N. B. Wood |
author_sort |
L. Milani |
title |
CloudSat snowfall estimates over Antarctica and the Southern Ocean: An assessment of independent retrieval methodologies and multi-year snowfall analysis |
title_short |
CloudSat snowfall estimates over Antarctica and the Southern Ocean: An assessment of independent retrieval methodologies and multi-year snowfall analysis |
title_full |
CloudSat snowfall estimates over Antarctica and the Southern Ocean: An assessment of independent retrieval methodologies and multi-year snowfall analysis |
title_fullStr |
CloudSat snowfall estimates over Antarctica and the Southern Ocean: An assessment of independent retrieval methodologies and multi-year snowfall analysis |
title_full_unstemmed |
CloudSat snowfall estimates over Antarctica and the Southern Ocean: An assessment of independent retrieval methodologies and multi-year snowfall analysis |
title_sort |
cloudsat snowfall estimates over antarctica and the southern ocean: an assessment of independent retrieval methodologies and multi-year snowfall analysis |
publishDate |
2018 |
url |
http://hdl.handle.net/11585/635344 https://doi.org/10.1016/j.atmosres.2018.05.015 https://www.sciencedirect.com/science/article/pii/S0169809517310682?via=ihub |
genre |
Antarc* Antarctic Antarctica antartic* Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica antartic* Sea ice Southern Ocean |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000442169800011 volume:213 firstpage:121 lastpage:135 numberofpages:15 journal:ATMOSPHERIC RESEARCH http://hdl.handle.net/11585/635344 doi:10.1016/j.atmosres.2018.05.015 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85048196576 https://www.sciencedirect.com/science/article/pii/S0169809517310682?via=ihub |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/j.atmosres.2018.05.015 |
container_title |
Atmospheric Research |
container_volume |
213 |
container_start_page |
121 |
op_container_end_page |
135 |
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1810494600631025664 |