Artifacts in Century-Length Atmospheric and Coupled Reanalyses Over Antarctica Due To Historical Data Availability
©2018. American Geophysical Union. All Rights Reserved. Enabled by advances in data assimilation and the digitization of historical observations, atmospheric reanalysis products that span the entire twentieth century provide valuable gridded data over the sparsely observed high-latitude Southern Hem...
Published in: | Geophysical Research Letters |
---|---|
Main Authors: | , |
Format: | Text |
Language: | unknown |
Published: |
OHIO Open Library
2018
|
Subjects: | |
Online Access: | https://ohioopen.library.ohio.edu/geography-oapub/12 https://doi.org/10.1002/2017GL076226 |
id |
ftohiouniv:oai:ohioopen.library.ohio.edu:geography-oapub-1011 |
---|---|
record_format |
openpolar |
spelling |
ftohiouniv:oai:ohioopen.library.ohio.edu:geography-oapub-1011 2023-10-01T03:51:58+02:00 Artifacts in Century-Length Atmospheric and Coupled Reanalyses Over Antarctica Due To Historical Data Availability Schneider, David P. Fogt, Ryan L. 2018-01-28T08:00:00Z https://ohioopen.library.ohio.edu/geography-oapub/12 https://doi.org/10.1002/2017GL076226 unknown OHIO Open Library https://ohioopen.library.ohio.edu/geography-oapub/12 https://www.doi.org/10.1002/2017GL076226 Geography Open Access Publications Antarctica atmospheric reanalysis Southern Ocean surface pressure Geography text 2018 ftohiouniv https://doi.org/10.1002/2017GL076226 2023-09-02T18:35:53Z ©2018. American Geophysical Union. All Rights Reserved. Enabled by advances in data assimilation and the digitization of historical observations, atmospheric reanalysis products that span the entire twentieth century provide valuable gridded data over the sparsely observed high-latitude Southern Hemisphere. Here austral summer and winter surface pressure trends in three reanalyses are compared to trends in a statistically based pressure reconstruction, trends in atmospheric models without data assimilation, and estimates of uncertainty from the reanalyses. In austral summer during the early twentieth century, the reanalyses underestimate the depth of the circumpolar trough, leading to erroneously high pressure values over the region. Around 1950, a rapid increase in the number of assimilated pressure observations leads to a dramatic reduction in the reanalyses standard error and a spurious drop in the surface pressure. A more likely history of the surface pressure over this region is provided by the reconstruction, which is consistent with the model simulations without data assimilation. Text Antarc* Antarctica Southern Ocean OHIO Open Library (Ohio University) Southern Ocean Austral Geophysical Research Letters 45 2 964 973 |
institution |
Open Polar |
collection |
OHIO Open Library (Ohio University) |
op_collection_id |
ftohiouniv |
language |
unknown |
topic |
Antarctica atmospheric reanalysis Southern Ocean surface pressure Geography |
spellingShingle |
Antarctica atmospheric reanalysis Southern Ocean surface pressure Geography Schneider, David P. Fogt, Ryan L. Artifacts in Century-Length Atmospheric and Coupled Reanalyses Over Antarctica Due To Historical Data Availability |
topic_facet |
Antarctica atmospheric reanalysis Southern Ocean surface pressure Geography |
description |
©2018. American Geophysical Union. All Rights Reserved. Enabled by advances in data assimilation and the digitization of historical observations, atmospheric reanalysis products that span the entire twentieth century provide valuable gridded data over the sparsely observed high-latitude Southern Hemisphere. Here austral summer and winter surface pressure trends in three reanalyses are compared to trends in a statistically based pressure reconstruction, trends in atmospheric models without data assimilation, and estimates of uncertainty from the reanalyses. In austral summer during the early twentieth century, the reanalyses underestimate the depth of the circumpolar trough, leading to erroneously high pressure values over the region. Around 1950, a rapid increase in the number of assimilated pressure observations leads to a dramatic reduction in the reanalyses standard error and a spurious drop in the surface pressure. A more likely history of the surface pressure over this region is provided by the reconstruction, which is consistent with the model simulations without data assimilation. |
format |
Text |
author |
Schneider, David P. Fogt, Ryan L. |
author_facet |
Schneider, David P. Fogt, Ryan L. |
author_sort |
Schneider, David P. |
title |
Artifacts in Century-Length Atmospheric and Coupled Reanalyses Over Antarctica Due To Historical Data Availability |
title_short |
Artifacts in Century-Length Atmospheric and Coupled Reanalyses Over Antarctica Due To Historical Data Availability |
title_full |
Artifacts in Century-Length Atmospheric and Coupled Reanalyses Over Antarctica Due To Historical Data Availability |
title_fullStr |
Artifacts in Century-Length Atmospheric and Coupled Reanalyses Over Antarctica Due To Historical Data Availability |
title_full_unstemmed |
Artifacts in Century-Length Atmospheric and Coupled Reanalyses Over Antarctica Due To Historical Data Availability |
title_sort |
artifacts in century-length atmospheric and coupled reanalyses over antarctica due to historical data availability |
publisher |
OHIO Open Library |
publishDate |
2018 |
url |
https://ohioopen.library.ohio.edu/geography-oapub/12 https://doi.org/10.1002/2017GL076226 |
geographic |
Southern Ocean Austral |
geographic_facet |
Southern Ocean Austral |
genre |
Antarc* Antarctica Southern Ocean |
genre_facet |
Antarc* Antarctica Southern Ocean |
op_source |
Geography Open Access Publications |
op_relation |
https://ohioopen.library.ohio.edu/geography-oapub/12 https://www.doi.org/10.1002/2017GL076226 |
op_doi |
https://doi.org/10.1002/2017GL076226 |
container_title |
Geophysical Research Letters |
container_volume |
45 |
container_issue |
2 |
container_start_page |
964 |
op_container_end_page |
973 |
_version_ |
1778517371449769984 |