(Table 2) Foehn characteristics of station in the McMurdo Dry Valleys, Antarctica
Foehn winds resulting from topographic modification of airflow in the lee of mountain barriers are frequently experienced in the McMurdo Dry Valleys (MDVs) of Antarctica. Strong foehn winds in the MDVs cause dramatic warming at onset and have significant effects on landscape forming processes; howev...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.837426 2023-05-15T14:03:04+02:00 (Table 2) Foehn characteristics of station in the McMurdo Dry Valleys, Antarctica Speirs, Johanna C Steinhoff, Daniel F McGowan, Hamish A Bromwich, David H Monaghan, Andrew J MEDIAN LATITUDE: -77.623000 * MEDIAN LONGITUDE: 162.503618 * SOUTH-BOUND LATITUDE: -77.828000 * WEST-BOUND LONGITUDE: 160.656800 * NORTH-BOUND LATITUDE: -77.378000 * EAST-BOUND LONGITUDE: 163.418000 * DATE/TIME START: 2007-05-21T03:15:00 * DATE/TIME END: 2007-05-22T17:00:00 * MINIMUM ELEVATION: 20.0 m * MAXIMUM ELEVATION: 1176.0 m 2010-10-27 text/tab-separated-values, 82 data points https://doi.pangaea.de/10.1594/PANGAEA.837426 https://doi.org/10.1594/PANGAEA.837426 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.837426 https://doi.org/10.1594/PANGAEA.837426 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Speirs, Johanna C; Steinhoff, Daniel F; McGowan, Hamish A; Bromwich, David H; Monaghan, Andrew J (2010): Foehn Winds in the McMurdo Dry Valleys, Antarctica: The Origin of Extreme Warming Events. Journal of Climate, 23(13), 3577-3598, https://doi.org/10.1175/2010JCLI3382.1 Beacon_Valley2 Canada_Gl Comment Commonw_Gl DATE/TIME Date/time end Event label Explorers_Cove2 Howard_Gl Humidity relative minimum International Polar Year (2007-2008) IPY Lake_Bonney Lake_Fryxell2 Lake_Hoare2 Lake_Vanda2 Lake_Vida McMurdo Dry Valleys southern Victorica Land Antarctica Station label Taylor_Gl Taylor Valley East Antarctica Temperature air maximum Unmanned weather station/meteorological observation UWST Victoria Valley Wind direction Wind speed gust Wright Valley Dataset 2010 ftpangaea https://doi.org/10.1594/PANGAEA.837426 https://doi.org/10.1175/2010JCLI3382.1 2023-01-20T09:04:10Z Foehn winds resulting from topographic modification of airflow in the lee of mountain barriers are frequently experienced in the McMurdo Dry Valleys (MDVs) of Antarctica. Strong foehn winds in the MDVs cause dramatic warming at onset and have significant effects on landscape forming processes; however, no detailed scientific investigation of foehn in the MDVs has been conducted. As a result, they are often misinterpreted as adiabatically warmed katabatic winds draining from the polar plateau. Herein observations from surface weather stations and numerical model output from the Antarctic Mesoscale Prediction System (AMPS) during foehn events in the MDVs are presented. Results show that foehn winds in the MDVs are caused by topographic modification of south-southwesterly airflow, which is channeled into the valleys from higher levels. Modeling of a winter foehn event identifies mountain wave activity similar to that associated with midlatitude foehn winds. These events are found to be caused by strong pressure gradients over the mountain ranges of the MDVs related to synoptic-scale cyclones positioned off the coast of Marie Byrd Land. Analysis of meteorological records for 2006 and 2007 finds an increase of 10% in the frequency of foehn events in 2007 compared to 2006, which corresponds to stronger pressure gradients in the Ross Sea region. It is postulated that the intra- and interannual frequency and intensity of foehn events in the MDVs may therefore vary in response to the position and frequency of cyclones in the Ross Sea region. Dataset Antarc* Antarctic Antarctica East Antarctica International Polar Year IPY Marie Byrd Land McMurdo Dry Valleys Ross Sea PANGAEA - Data Publisher for Earth & Environmental Science Antarctic The Antarctic East Antarctica Ross Sea McMurdo Dry Valleys Byrd Taylor Valley ENVELOPE(163.000,163.000,-77.617,-77.617) Marie Byrd Land ENVELOPE(-130.000,-130.000,-78.000,-78.000) Wright Valley ENVELOPE(161.833,161.833,-77.517,-77.517) Polar Plateau ENVELOPE(0.000,0.000,-90.000,-90.000) Victoria Valley ENVELOPE(162.000,162.000,-77.383,-77.383) ENVELOPE(160.656800,163.418000,-77.378000,-77.828000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Beacon_Valley2 Canada_Gl Comment Commonw_Gl DATE/TIME Date/time end Event label Explorers_Cove2 Howard_Gl Humidity relative minimum International Polar Year (2007-2008) IPY Lake_Bonney Lake_Fryxell2 Lake_Hoare2 Lake_Vanda2 Lake_Vida McMurdo Dry Valleys southern Victorica Land Antarctica Station label Taylor_Gl Taylor Valley East Antarctica Temperature air maximum Unmanned weather station/meteorological observation UWST Victoria Valley Wind direction Wind speed gust Wright Valley |
spellingShingle |
Beacon_Valley2 Canada_Gl Comment Commonw_Gl DATE/TIME Date/time end Event label Explorers_Cove2 Howard_Gl Humidity relative minimum International Polar Year (2007-2008) IPY Lake_Bonney Lake_Fryxell2 Lake_Hoare2 Lake_Vanda2 Lake_Vida McMurdo Dry Valleys southern Victorica Land Antarctica Station label Taylor_Gl Taylor Valley East Antarctica Temperature air maximum Unmanned weather station/meteorological observation UWST Victoria Valley Wind direction Wind speed gust Wright Valley Speirs, Johanna C Steinhoff, Daniel F McGowan, Hamish A Bromwich, David H Monaghan, Andrew J (Table 2) Foehn characteristics of station in the McMurdo Dry Valleys, Antarctica |
topic_facet |
Beacon_Valley2 Canada_Gl Comment Commonw_Gl DATE/TIME Date/time end Event label Explorers_Cove2 Howard_Gl Humidity relative minimum International Polar Year (2007-2008) IPY Lake_Bonney Lake_Fryxell2 Lake_Hoare2 Lake_Vanda2 Lake_Vida McMurdo Dry Valleys southern Victorica Land Antarctica Station label Taylor_Gl Taylor Valley East Antarctica Temperature air maximum Unmanned weather station/meteorological observation UWST Victoria Valley Wind direction Wind speed gust Wright Valley |
description |
Foehn winds resulting from topographic modification of airflow in the lee of mountain barriers are frequently experienced in the McMurdo Dry Valleys (MDVs) of Antarctica. Strong foehn winds in the MDVs cause dramatic warming at onset and have significant effects on landscape forming processes; however, no detailed scientific investigation of foehn in the MDVs has been conducted. As a result, they are often misinterpreted as adiabatically warmed katabatic winds draining from the polar plateau. Herein observations from surface weather stations and numerical model output from the Antarctic Mesoscale Prediction System (AMPS) during foehn events in the MDVs are presented. Results show that foehn winds in the MDVs are caused by topographic modification of south-southwesterly airflow, which is channeled into the valleys from higher levels. Modeling of a winter foehn event identifies mountain wave activity similar to that associated with midlatitude foehn winds. These events are found to be caused by strong pressure gradients over the mountain ranges of the MDVs related to synoptic-scale cyclones positioned off the coast of Marie Byrd Land. Analysis of meteorological records for 2006 and 2007 finds an increase of 10% in the frequency of foehn events in 2007 compared to 2006, which corresponds to stronger pressure gradients in the Ross Sea region. It is postulated that the intra- and interannual frequency and intensity of foehn events in the MDVs may therefore vary in response to the position and frequency of cyclones in the Ross Sea region. |
format |
Dataset |
author |
Speirs, Johanna C Steinhoff, Daniel F McGowan, Hamish A Bromwich, David H Monaghan, Andrew J |
author_facet |
Speirs, Johanna C Steinhoff, Daniel F McGowan, Hamish A Bromwich, David H Monaghan, Andrew J |
author_sort |
Speirs, Johanna C |
title |
(Table 2) Foehn characteristics of station in the McMurdo Dry Valleys, Antarctica |
title_short |
(Table 2) Foehn characteristics of station in the McMurdo Dry Valleys, Antarctica |
title_full |
(Table 2) Foehn characteristics of station in the McMurdo Dry Valleys, Antarctica |
title_fullStr |
(Table 2) Foehn characteristics of station in the McMurdo Dry Valleys, Antarctica |
title_full_unstemmed |
(Table 2) Foehn characteristics of station in the McMurdo Dry Valleys, Antarctica |
title_sort |
(table 2) foehn characteristics of station in the mcmurdo dry valleys, antarctica |
publisher |
PANGAEA |
publishDate |
2010 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.837426 https://doi.org/10.1594/PANGAEA.837426 |
op_coverage |
MEDIAN LATITUDE: -77.623000 * MEDIAN LONGITUDE: 162.503618 * SOUTH-BOUND LATITUDE: -77.828000 * WEST-BOUND LONGITUDE: 160.656800 * NORTH-BOUND LATITUDE: -77.378000 * EAST-BOUND LONGITUDE: 163.418000 * DATE/TIME START: 2007-05-21T03:15:00 * DATE/TIME END: 2007-05-22T17:00:00 * MINIMUM ELEVATION: 20.0 m * MAXIMUM ELEVATION: 1176.0 m |
long_lat |
ENVELOPE(163.000,163.000,-77.617,-77.617) ENVELOPE(-130.000,-130.000,-78.000,-78.000) ENVELOPE(161.833,161.833,-77.517,-77.517) ENVELOPE(0.000,0.000,-90.000,-90.000) ENVELOPE(162.000,162.000,-77.383,-77.383) ENVELOPE(160.656800,163.418000,-77.378000,-77.828000) |
geographic |
Antarctic The Antarctic East Antarctica Ross Sea McMurdo Dry Valleys Byrd Taylor Valley Marie Byrd Land Wright Valley Polar Plateau Victoria Valley |
geographic_facet |
Antarctic The Antarctic East Antarctica Ross Sea McMurdo Dry Valleys Byrd Taylor Valley Marie Byrd Land Wright Valley Polar Plateau Victoria Valley |
genre |
Antarc* Antarctic Antarctica East Antarctica International Polar Year IPY Marie Byrd Land McMurdo Dry Valleys Ross Sea |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica International Polar Year IPY Marie Byrd Land McMurdo Dry Valleys Ross Sea |
op_source |
Supplement to: Speirs, Johanna C; Steinhoff, Daniel F; McGowan, Hamish A; Bromwich, David H; Monaghan, Andrew J (2010): Foehn Winds in the McMurdo Dry Valleys, Antarctica: The Origin of Extreme Warming Events. Journal of Climate, 23(13), 3577-3598, https://doi.org/10.1175/2010JCLI3382.1 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.837426 https://doi.org/10.1594/PANGAEA.837426 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.837426 https://doi.org/10.1175/2010JCLI3382.1 |
_version_ |
1766273559634640896 |