Mesoscale evaluation of AMPS using AWARE radar observations of a wind and precipitation event over the Ross Island region of Antarctica
Abstract 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 observation...
Published in: | Quarterly Journal of the Royal Meteorological Society |
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crwiley:10.1002/qj.4327 2024-06-02T07:57:32+00:00 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. Office of Polar Programs National Science Foundation 2022 http://dx.doi.org/10.1002/qj.4327 https://onlinelibrary.wiley.com/doi/pdf/10.1002/qj.4327 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/qj.4327 https://rmets.onlinelibrary.wiley.com/doi/am-pdf/10.1002/qj.4327 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/qj.4327 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#am http://onlinelibrary.wiley.com/termsAndConditions#vor Quarterly Journal of the Royal Meteorological Society volume 148, issue 747, page 2607-2630 ISSN 0035-9009 1477-870X journal-article 2022 crwiley https://doi.org/10.1002/qj.4327 2024-05-03T10:58:11Z Abstract 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. The results show the first observationally based three‐dimensional understanding of meteorology in the Ross Island region. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ross Island Wiley Online Library Antarctic The Antarctic Ross Island McMurdo Station ENVELOPE(166.667,166.667,-77.850,-77.850) Quarterly Journal of the Royal Meteorological Society 148 747 2607 2630 |
institution |
Open Polar |
collection |
Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract 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. The results show the first observationally based three‐dimensional understanding of meteorology in the Ross Island region. |
author2 |
Office of Polar Programs National Science Foundation |
format |
Article in Journal/Newspaper |
author |
Kingsmill, David E. Seefeldt, Mark W. Cassano, John J. |
spellingShingle |
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 |
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 |
publisher |
Wiley |
publishDate |
2022 |
url |
http://dx.doi.org/10.1002/qj.4327 https://onlinelibrary.wiley.com/doi/pdf/10.1002/qj.4327 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/qj.4327 https://rmets.onlinelibrary.wiley.com/doi/am-pdf/10.1002/qj.4327 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/qj.4327 |
long_lat |
ENVELOPE(166.667,166.667,-77.850,-77.850) |
geographic |
Antarctic The Antarctic Ross Island McMurdo Station |
geographic_facet |
Antarctic The Antarctic Ross Island McMurdo Station |
genre |
Antarc* Antarctic Antarctica Ross Island |
genre_facet |
Antarc* Antarctic Antarctica Ross Island |
op_source |
Quarterly Journal of the Royal Meteorological Society volume 148, issue 747, page 2607-2630 ISSN 0035-9009 1477-870X |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#am http://onlinelibrary.wiley.com/termsAndConditions#vor |
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_ |
1800740702158585856 |