Mesoscale evaluation of AMPS using AWARE radar observations of a wind and precipitation event over the Ross Island region of Antarctica
Surface, upper-air, and radar observations are used to assess the performance of the Antarctic Mesoscale Prediction System (AMPS) in simulating the mesoscale aspects of a wind and precipitation event over the Ross Island region of Antarctica that spanned January 16–20, 2016. The observations, collec...
Published in: | Quarterly Journal of the Royal Meteorological Society |
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Online Access: | http://www.osti.gov/servlets/purl/1870375 https://www.osti.gov/biblio/1870375 https://doi.org/10.1002/qj.4327 |
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ftosti:oai:osti.gov:1870375 2023-07-30T03:58:31+02:00 Mesoscale evaluation of AMPS using AWARE radar observations of a wind and precipitation event over the Ross Island region of Antarctica Kingsmill, David E. Seefeldt, Mark W. Cassano, John J. 2023-05-29 application/pdf http://www.osti.gov/servlets/purl/1870375 https://www.osti.gov/biblio/1870375 https://doi.org/10.1002/qj.4327 unknown http://www.osti.gov/servlets/purl/1870375 https://www.osti.gov/biblio/1870375 https://doi.org/10.1002/qj.4327 doi:10.1002/qj.4327 54 ENVIRONMENTAL SCIENCES 2023 ftosti https://doi.org/10.1002/qj.4327 2023-07-11T10:12:43Z Surface, upper-air, and radar observations are used to assess the performance of the Antarctic Mesoscale Prediction System (AMPS) in simulating the mesoscale aspects of a wind and precipitation event over the Ross Island region of Antarctica that spanned January 16–20, 2016. The observations, collected during the Atmospheric Radiation Measurement (ARM) West Antarctic Radiation Experiment (AWARE), provide a unique dataset for evaluating AMPS, especially the radar observations that facilitate a three-dimensional depiction of winds and precipitation. Comparisons of AMPS forecast data with surface meteorology, balloon-sounding, and profiling radar observations at and above sites near McMurdo Station reveal a mixture of similarities and differences. A generally southerly flow is evident at low levels in both the AMPS simulations and observed Doppler radial velocities. AMPS winds are comparable to those observed at the surface and aloft in terms of magnitude, direction, and timing but the strongest simulated southerly flow is displaced eastward relative to the observations. AMPS-simulated reflectivity over the broader Ross Island region is more limited in areal extent and smaller in magnitude than observed by a scanning Doppler radar. Three episodes of surface precipitation are observed near McMurdo Station over the five-day event with peak rates of ~3 mm h -1 and a total accumulation of ~22 mm. However, AMPS produces no surface precipitation at that location over the five-day event due to a low-level dry bias in the forecasts. Herein, the results show the first observationally based three-dimensional understanding of meteorology in the Ross Island region. Other/Unknown Material Antarc* Antarctic Antarctica Ross Island SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) Antarctic McMurdo Station ENVELOPE(166.667,166.667,-77.850,-77.850) Ross Island The Antarctic Quarterly Journal of the Royal Meteorological Society 148 747 2607 2630 |
institution |
Open Polar |
collection |
SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
op_collection_id |
ftosti |
language |
unknown |
topic |
54 ENVIRONMENTAL SCIENCES |
spellingShingle |
54 ENVIRONMENTAL SCIENCES Kingsmill, David E. Seefeldt, Mark W. Cassano, John J. Mesoscale evaluation of AMPS using AWARE radar observations of a wind and precipitation event over the Ross Island region of Antarctica |
topic_facet |
54 ENVIRONMENTAL SCIENCES |
description |
Surface, upper-air, and radar observations are used to assess the performance of the Antarctic Mesoscale Prediction System (AMPS) in simulating the mesoscale aspects of a wind and precipitation event over the Ross Island region of Antarctica that spanned January 16–20, 2016. The observations, collected during the Atmospheric Radiation Measurement (ARM) West Antarctic Radiation Experiment (AWARE), provide a unique dataset for evaluating AMPS, especially the radar observations that facilitate a three-dimensional depiction of winds and precipitation. Comparisons of AMPS forecast data with surface meteorology, balloon-sounding, and profiling radar observations at and above sites near McMurdo Station reveal a mixture of similarities and differences. A generally southerly flow is evident at low levels in both the AMPS simulations and observed Doppler radial velocities. AMPS winds are comparable to those observed at the surface and aloft in terms of magnitude, direction, and timing but the strongest simulated southerly flow is displaced eastward relative to the observations. AMPS-simulated reflectivity over the broader Ross Island region is more limited in areal extent and smaller in magnitude than observed by a scanning Doppler radar. Three episodes of surface precipitation are observed near McMurdo Station over the five-day event with peak rates of ~3 mm h -1 and a total accumulation of ~22 mm. However, AMPS produces no surface precipitation at that location over the five-day event due to a low-level dry bias in the forecasts. Herein, the results show the first observationally based three-dimensional understanding of meteorology in the Ross Island region. |
author |
Kingsmill, David E. Seefeldt, Mark W. Cassano, John J. |
author_facet |
Kingsmill, David E. Seefeldt, Mark W. Cassano, John J. |
author_sort |
Kingsmill, David E. |
title |
Mesoscale evaluation of AMPS using AWARE radar observations of a wind and precipitation event over the Ross Island region of Antarctica |
title_short |
Mesoscale evaluation of AMPS using AWARE radar observations of a wind and precipitation event over the Ross Island region of Antarctica |
title_full |
Mesoscale evaluation of AMPS using AWARE radar observations of a wind and precipitation event over the Ross Island region of Antarctica |
title_fullStr |
Mesoscale evaluation of AMPS using AWARE radar observations of a wind and precipitation event over the Ross Island region of Antarctica |
title_full_unstemmed |
Mesoscale evaluation of AMPS using AWARE radar observations of a wind and precipitation event over the Ross Island region of Antarctica |
title_sort |
mesoscale evaluation of amps using aware radar observations of a wind and precipitation event over the ross island region of antarctica |
publishDate |
2023 |
url |
http://www.osti.gov/servlets/purl/1870375 https://www.osti.gov/biblio/1870375 https://doi.org/10.1002/qj.4327 |
long_lat |
ENVELOPE(166.667,166.667,-77.850,-77.850) |
geographic |
Antarctic McMurdo Station Ross Island The Antarctic |
geographic_facet |
Antarctic McMurdo Station Ross Island The Antarctic |
genre |
Antarc* Antarctic Antarctica Ross Island |
genre_facet |
Antarc* Antarctic Antarctica Ross Island |
op_relation |
http://www.osti.gov/servlets/purl/1870375 https://www.osti.gov/biblio/1870375 https://doi.org/10.1002/qj.4327 doi:10.1002/qj.4327 |
op_doi |
https://doi.org/10.1002/qj.4327 |
container_title |
Quarterly Journal of the Royal Meteorological Society |
container_volume |
148 |
container_issue |
747 |
container_start_page |
2607 |
op_container_end_page |
2630 |
_version_ |
1772821301062270976 |