Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018JD028788 |
Observations of Reduced Turbulence and Wave Activity in the Arctic Middle Atmosphere Following the January 2015 Sudden Stratospheric Warming | |
Triplett, Colin C.1; Li, Jintai2,3; Collins, Richard L.2,3; Lehmacher, Gerald A.4; Barjatya, Aroh5; Fritts, David C.6; Strelnikov, Boris7; Luebken, Franz-Josef7; Thurairajah, Brentha8; Harvey, V. Lynn9; Hampton, Donald L.2; Varney, Roger H.10 | |
2018-12-16 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES |
ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2018 |
卷号 | 123期号:23页码:13259-13276 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Germany |
英文摘要 | Measurements of turbulence and waves were made as part of the Mesosphere-Lower Thermosphere Turbulence Experiment (MTeX) on the night of 25-26 January 2015 at Poker Flat Research Range, Chatanika, Alaska (65 degrees N, 147 degrees W). Rocket-borne ionization gauge measurements revealed turbulence in the 70- to 88-km altitude region with energy dissipation rates between 0.1 and 24mW/kg with an average value of 2.6mW/kg. The eddy diffusion coefficient varied between 0.3 and 134m(2)/s with an average value of 10m(2)/s. Turbulence was detected around mesospheric inversion layers (MILs) in both the topside and bottomside of the MILs. These low levels of turbulence were measured after a minor sudden stratospheric warming when the circulation continued to be disturbed by planetary waves and winds remained weak in the stratosphere and mesosphere. Ground-based lidar measurements characterized the ensemble of inertia-gravity waves and monochromatic gravity waves. The ensemble of inertia-gravity waves had a specific potential energy of 0.8J/kg over the 40- to 50-km altitude region, one of the lowest values recorded at Chatanika. The turbulence measurements coincided with the overturning of a 2.5-hr monochromatic gravity wave in a depth of 3 km at 85km. The energy dissipation rates were estimated to be 3mW/kg for the ensemble of waves and 18mW/kg for the monochromatic wave. The MTeX observations reveal low levels of turbulence associated with low levels of gravity wave activity. In the light of other Arctic observations and model studies, these observations suggest that there may be reduced turbulence during disturbed winters. Plain Language Summary Turbulence remains an outstanding challenge in understanding coupling, energetics, and dynamics of the atmosphere. However, turbulence is recognized as a critical component in our models of terrestrial and space weather. Obtaining routine and accurate measurements of turbulence continues to be a major challenge. We present new rocket-borne measurements of turbulence in January 2015 at Poker Flat Research Range, Alaska. These rocket-borne measurements were coordinated with a suite of ground-based instruments. The rocket-borne instruments captured the small-scale structure of the turbulence. The ground-based measurements documented the meteorological and space weather conditions. We find low levels of turbulence coinciding with a disturbed atmosphere where wave activity is reduced. These finding suggest that there may be systematically low levels of turbulence in the Arctic middle atmosphere, as the Arctic middle atmosphere is routinely disturbed in winter. |
英文关键词 | turbulence gravity waves SSW ion-gauge lidar |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000455285500013 |
WOS关键词 | IN-SITU MEASUREMENTS ; MESOSPHERIC INVERSION LAYER ; GRAVITY-WAVE ; TEMPERATURE INVERSIONS ; LOWER THERMOSPHERE ; MESOPAUSE REGION ; NA LIDAR ; INSTABILITY ; GENERATION ; TRANSPORT |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/34076 |
专题 | 气候变化 |
作者单位 | 1.Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA; 2.Univ Alaska Fairbanks, Inst Geophys, Fairbanks, AK 99775 USA; 3.Univ Alaska Fairbanks, Dept Atmospher Sci, Fairbanks, AK 99775 USA; 4.Clemson Univ, Dept Phys & Astron, Clemson, SC 29634 USA; 5.Embry Riddle Aeronaut Univ, Dept Phys Sci, Daytona Beach, FL USA; 6.GATS Inc, Boulder, CO USA; 7.Univ Rostock, Leibniz Inst Atmospher Phys, Kuhlungsborn, Germany; 8.Virginia Tech, Ctr Space Sci & Engn Res, Blacksburg, VA USA; 9.Univ Colorado Boulder, Lab Atmospher & Space Phys, Boulder, CO USA; 10.SRI Int, Ctr Geospace Studies, 333 Ravenswood Ave, Menlo Pk, CA 94025 USA |
推荐引用方式 GB/T 7714 | Triplett, Colin C.,Li, Jintai,Collins, Richard L.,et al. Observations of Reduced Turbulence and Wave Activity in the Arctic Middle Atmosphere Following the January 2015 Sudden Stratospheric Warming[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2018,123(23):13259-13276. |
APA | Triplett, Colin C..,Li, Jintai.,Collins, Richard L..,Lehmacher, Gerald A..,Barjatya, Aroh.,...&Varney, Roger H..(2018).Observations of Reduced Turbulence and Wave Activity in the Arctic Middle Atmosphere Following the January 2015 Sudden Stratospheric Warming.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,123(23),13259-13276. |
MLA | Triplett, Colin C.,et al."Observations of Reduced Turbulence and Wave Activity in the Arctic Middle Atmosphere Following the January 2015 Sudden Stratospheric Warming".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 123.23(2018):13259-13276. |
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