Influence of Wind Direction on Thermodynamic Properties and Arctic Mixed-Phase Clouds in Autumn at Utqiagvik, Alaska
Seven years of autumnal ground-based observations (September–November 2002–2008) at the U.S. Department of Energy Atmospheric Radiation Measurement North Slope of Alaska site have been analyzed for addressing the occurrence frequency and macrophysical and microphysical properties of Arctic mixed-pha...
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ftosti:oai:osti.gov:1563958 2023-07-30T04:01:36+02:00 Influence of Wind Direction on Thermodynamic Properties and Arctic Mixed-Phase Clouds in Autumn at Utqiagvik, Alaska Qiu, Shaoyue Xi, Baike Dong, Xiquan 2022-01-03 application/pdf http://www.osti.gov/servlets/purl/1563958 https://www.osti.gov/biblio/1563958 https://doi.org/10.1029/2018jd028631 unknown http://www.osti.gov/servlets/purl/1563958 https://www.osti.gov/biblio/1563958 https://doi.org/10.1029/2018jd028631 doi:10.1029/2018jd028631 54 ENVIRONMENTAL SCIENCES 2022 ftosti https://doi.org/10.1029/2018jd028631 2023-07-11T09:36:58Z Seven years of autumnal ground-based observations (September–November 2002–2008) at the U.S. Department of Energy Atmospheric Radiation Measurement North Slope of Alaska site have been analyzed for addressing the occurrence frequency and macrophysical and microphysical properties of Arctic mixed-phase clouds (AMC), as well as the relationship between environmental parameters and AMC properties. In September and October, AMC occurrence frequency is 20–30% lower during a southerly wind when compared to the other wind directions; in November, the variation of AMC occurrence frequency with wind direction is small. The mean liquid water path in November is about half of that in October and September. When the surface is snow free, temperature ( T ) and specific humidity ( q ) profiles during a northerly wind are warmer and moister than those for the southerly wind. Northerly wind profiles have a higher relative humidity to ice (RH i ) and lower atmosphere stability. Furthermore, the AMC occurrence frequency has a positive relationship with RH i and a negative relationship with stability. These two points may explain the lower AMC occurrence frequency during a southerly wind. During a northerly wind, AMCs have larger radar reflectivity, wider spectrum width, and larger Doppler velocity signatures. The stronger precipitation for AMC during a northerly wind is possibly due to the cleaner air masses from the ocean (north). Lastly, with the same amount of q, the radar spectrum width has a higher frequency in the larger bins during a northerly wind. Both T, q , and radar reflectivity, radar spectrum width profiles show evidence of deposition in the sub-cloud layer in September and October. Other/Unknown Material Arctic north slope Alaska SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) Arctic Journal of Geophysical Research: Atmospheres 123 17 9589 9603 |
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SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
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ftosti |
language |
unknown |
topic |
54 ENVIRONMENTAL SCIENCES |
spellingShingle |
54 ENVIRONMENTAL SCIENCES Qiu, Shaoyue Xi, Baike Dong, Xiquan Influence of Wind Direction on Thermodynamic Properties and Arctic Mixed-Phase Clouds in Autumn at Utqiagvik, Alaska |
topic_facet |
54 ENVIRONMENTAL SCIENCES |
description |
Seven years of autumnal ground-based observations (September–November 2002–2008) at the U.S. Department of Energy Atmospheric Radiation Measurement North Slope of Alaska site have been analyzed for addressing the occurrence frequency and macrophysical and microphysical properties of Arctic mixed-phase clouds (AMC), as well as the relationship between environmental parameters and AMC properties. In September and October, AMC occurrence frequency is 20–30% lower during a southerly wind when compared to the other wind directions; in November, the variation of AMC occurrence frequency with wind direction is small. The mean liquid water path in November is about half of that in October and September. When the surface is snow free, temperature ( T ) and specific humidity ( q ) profiles during a northerly wind are warmer and moister than those for the southerly wind. Northerly wind profiles have a higher relative humidity to ice (RH i ) and lower atmosphere stability. Furthermore, the AMC occurrence frequency has a positive relationship with RH i and a negative relationship with stability. These two points may explain the lower AMC occurrence frequency during a southerly wind. During a northerly wind, AMCs have larger radar reflectivity, wider spectrum width, and larger Doppler velocity signatures. The stronger precipitation for AMC during a northerly wind is possibly due to the cleaner air masses from the ocean (north). Lastly, with the same amount of q, the radar spectrum width has a higher frequency in the larger bins during a northerly wind. Both T, q , and radar reflectivity, radar spectrum width profiles show evidence of deposition in the sub-cloud layer in September and October. |
author |
Qiu, Shaoyue Xi, Baike Dong, Xiquan |
author_facet |
Qiu, Shaoyue Xi, Baike Dong, Xiquan |
author_sort |
Qiu, Shaoyue |
title |
Influence of Wind Direction on Thermodynamic Properties and Arctic Mixed-Phase Clouds in Autumn at Utqiagvik, Alaska |
title_short |
Influence of Wind Direction on Thermodynamic Properties and Arctic Mixed-Phase Clouds in Autumn at Utqiagvik, Alaska |
title_full |
Influence of Wind Direction on Thermodynamic Properties and Arctic Mixed-Phase Clouds in Autumn at Utqiagvik, Alaska |
title_fullStr |
Influence of Wind Direction on Thermodynamic Properties and Arctic Mixed-Phase Clouds in Autumn at Utqiagvik, Alaska |
title_full_unstemmed |
Influence of Wind Direction on Thermodynamic Properties and Arctic Mixed-Phase Clouds in Autumn at Utqiagvik, Alaska |
title_sort |
influence of wind direction on thermodynamic properties and arctic mixed-phase clouds in autumn at utqiagvik, alaska |
publishDate |
2022 |
url |
http://www.osti.gov/servlets/purl/1563958 https://www.osti.gov/biblio/1563958 https://doi.org/10.1029/2018jd028631 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic north slope Alaska |
genre_facet |
Arctic north slope Alaska |
op_relation |
http://www.osti.gov/servlets/purl/1563958 https://www.osti.gov/biblio/1563958 https://doi.org/10.1029/2018jd028631 doi:10.1029/2018jd028631 |
op_doi |
https://doi.org/10.1029/2018jd028631 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
123 |
container_issue |
17 |
container_start_page |
9589 |
op_container_end_page |
9603 |
_version_ |
1772812368632348672 |