Journal of Atmospheric and Terrestrial Physics最新文献

WINDII/UARS observation of twilight behaviour of the hydroxyl airglow, at mid-latitude equinox WINDII/UARS在中纬度分点观测羟基气辉的黄昏行为

Journal of Atmospheric and Terrestrial Physics Pub Date : 1996-12-01 DOI: 10.1016/0021-9169(95)00178-6

R.P. Lowe, L.M. LeBlanc, K.L. Gilbert

引用次数: 31

ALOMAR: atmospheric science using lidars, radars and ground based instruments ALOMAR:利用激光雷达、雷达和地面仪器进行大气科学研究

Journal of Atmospheric and Terrestrial Physics Pub Date : 1996-12-01 DOI: 10.1016/0021-9169(95)00173-5

Rolf Skatteboe

{"title":"ALOMAR: atmospheric science using lidars, radars and ground based instruments","authors":"Rolf Skatteboe","doi":"10.1016/0021-9169(95)00173-5","DOIUrl":"10.1016/0021-9169(95)00173-5","url":null,"abstract":"<div>On top of the 379 m high Ramnan mountain on the island of Andøya (69°30′N, 16°01′E) in Northern Norway, the ALOMAR (The Arctic Lidar Observatory for Middle Atmospheric Research) will soon be in operation. Through measurements of different atmospheric parameters, ALOMAR will provide information on the dynamics of the middle and upper atmosphere using ground-based instrumentation. Routine measurements, including ozone observations, can be carried out more efficiently than currently possible. The observatory is currently using three LIDAR instruments, one radar and several ground-based instruments to measure density, temperature, wind profiles and aerosol densities over a height range of approximately 10 to 100 km. ALOMAR will provide scientists worldwide with the opportunity for year-round, in-depth studies of the polar middle atmosphere, concentrating on physics, chemistry and meteorology. The observatory will offer unique research opportunities, and its activities can be correlated using the Andøya Rocket Range (ARR), who operate the facility, and with other important research facilities such as the EISCAT radar, and the University of Tromsø observatories which are located nearby. There are many opportunities for additional cooperative scientific experiments using ground-based measurements and instruments carried by aircraft, balloons and sounding rockets.</div>","PeriodicalId":100754,"journal":{"name":"Journal of Atmospheric and Terrestrial Physics","volume":"58 16","pages":"Pages 1823-1826"},"PeriodicalIF":0.0,"publicationDate":"1996-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0021-9169(95)00173-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53072359","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 10

The connection between solar activity and long-term trends of total ozone in the Northern hemisphere 太阳活动与北半球总臭氧的长期趋势之间的联系

Journal of Atmospheric and Terrestrial Physics Pub Date : 1996-12-01 DOI: 10.1016/0021-9169(95)00176-X

E.I. Terez, G.A. Terez

引用次数: 3

Gravity wave activity in the upper mesosphere over Urbana, Illinois: lidar observations and analysis of gravity wave propagation models 伊利诺斯州厄巴纳上空上层中间层的重力波活动:激光雷达观测和重力波传播模式分析

Journal of Atmospheric and Terrestrial Physics Pub Date : 1996-12-01 DOI: 10.1016/0021-9169(96)00026-8

Richard L. Collins , Xin Tao , Chester S. Gardner

{"title":"Gravity wave activity in the upper mesosphere over Urbana, Illinois: lidar observations and analysis of gravity wave propagation models","authors":"Richard L. Collins , Xin Tao , Chester S. Gardner","doi":"10.1016/0021-9169(96)00026-8","DOIUrl":"10.1016/0021-9169(96)00026-8","url":null,"abstract":"<div>We analyze 375 h of Na Wind/Temperature lidar measurements of the mesopause region (≈ 80–105 km) Na density and temperature profiles on 57 nights distributed over 2 yr at Urbana, Illinois. These observations yield a high-resolution seasonal data set of gravity wave activity in the upper mesosphere. From this data, we present measurements of the Brunt-Väisälä period, the relative atmospheric density perturbations and their spectra, and the parameters of 143 quasi-monochromatic gravity waves. The direct measurement of the Brunt-Väisälä period allows accurate calculation of the horizontal velocity perturbations and vertical displacement perturbations from the density measurements. The horizontal velocity and vertical displacement vertical wave number spectrum magnitudes and indices show considerable seasonal and nightly variability. The gravity wave amplitudes, wavelengths, and observed periods exhibit systematic relationships similar to those found in previous studies, and are consistent with the MU radar measurements of intrinsic gravity wave parameters. Here, we present a detailed analysis of the observations in terms of Diffusive-Filtering Theory models of gravity wave propagation. The magnitudes of the vertical wave number spectrum, the form of the joint vertical wave number and frequency spectrum, and the systematic relationships between the monochromatic gravity wave parameters are consistent with the Diffusive-Filtering model. We compare these results with a variety of radar, lidar, and airglow observations from other sites. This observational study suggests that the complex nonlinear interactions of the gravity wave field may be modeled successfully as a diffusive damping process, where the effective diffusivity is a function of the total wave variance.</div>","PeriodicalId":100754,"journal":{"name":"Journal of Atmospheric and Terrestrial Physics","volume":"58 16","pages":"Pages 1905-1926"},"PeriodicalIF":0.0,"publicationDate":"1996-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0021-9169(96)00026-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53073001","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 34

Rocket measurements of the equatorial airglow: MULTIFOT 92 database 赤道气辉的火箭测量:MULTIFOT 92数据库

Journal of Atmospheric and Terrestrial Physics Pub Date : 1996-12-01 DOI: 10.1016/0021-9169(95)00158-1

Hisao Takahashi , B.R. Clemesha , D.M. Simonich , Stella M.L. Melo , N.R. Teixeira , Agnaldo Eras , J. Stegman , G. Witt

引用次数: 23

Thermospheric and mesospheric temperatures during geomagnetic storms at 23°S 23°S地磁风暴期间的热层和中间层温度

Journal of Atmospheric and Terrestrial Physics Pub Date : 1996-12-01 DOI: 10.1016/0021-9169(96)00001-3

P.R. Fagundes, Y. Sahai, H. Takahashi, D. Gobbi, J.A. Bittencourt

{"title":"Thermospheric and mesospheric temperatures during geomagnetic storms at 23°S","authors":"P.R. Fagundes, Y. Sahai, H. Takahashi, D. Gobbi, J.A. Bittencourt","doi":"10.1016/0021-9169(96)00001-3","DOIUrl":"10.1016/0021-9169(96)00001-3","url":null,"abstract":"<div>Night-time thermospheric temperatures, T63o, and mesospheric rotational temperatures, T(OH) and T(O2), have been measured at Cachoeira Paulista (23°S, 45°W, 16°S dip latitude), located in both the equatorial ionospheric anomaly and the South Atlantic Geomagnetic Anomaly, with a Fabry-Perot interferometer and a multi-channel tilting filter-type photometer, respectively. The thermospheric temperatures are obtained from the Doppler line broadening of the OI 630.0 nm emission and the mesospheric rotational temperatures from the OH(9,4) and O2A(0,1) band emissions. Measurements made during three geomagnetic storms showed that the nocturnal mean values of T630 during the recovery phase of the storms were lower than those observed during quiet time and from model predictions. Also, the nocturnal mean value of the T630 soon after the SSC event on 27 June 1992 was higher than the quiet time and model predictions. The observed mesospheric nocturnal mean rotational temperatures, T(O2) and T(O2), were unaffected by the storms. A comparison of the night-time observed temperatures T630, T(OH) and T(O2) with those calculated using the MSIS-86 model is also presented.</div>","PeriodicalId":100754,"journal":{"name":"Journal of Atmospheric and Terrestrial Physics","volume":"58 16","pages":"Pages 1963-1972"},"PeriodicalIF":0.0,"publicationDate":"1996-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0021-9169(96)00001-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53072941","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 9

European meeting on atmospheric studies by optical methods University College of London, 12–16 September 1994 光学方法大气研究欧洲会议，伦敦大学学院，1994年9月12日至16日

Journal of Atmospheric and Terrestrial Physics Pub Date : 1996-12-01 DOI: 10.1016/0021-9169(95)00172-7

D. Rees

引用次数: 0

Atomic oxygen concentrations from rocket airglow observations in the equatorial region 赤道地区火箭气辉观测所得的氧原子浓度

Journal of Atmospheric and Terrestrial Physics Pub Date : 1996-12-01 DOI: 10.1016/0021-9169(95)00192-1

Stella M.L. Melo, Hisao Takahashi, B.R. Clemesha, Paulo P. Batista, D.M. Simonich

引用次数: 27

Fabry-Perot spectrometer observations of the auroral oval/polar cap boundary above Mawson, Antarctica 南极莫森上空极光椭圆/极帽边界的法布里-珀罗光谱仪观测

Journal of Atmospheric and Terrestrial Physics Pub Date : 1996-12-01 DOI: 10.1016/0021-9169(96)00007-4

J.L. Innis , P.A. Greet , P.L. Dyson

{"title":"Fabry-Perot spectrometer observations of the auroral oval/polar cap boundary above Mawson, Antarctica","authors":"J.L. Innis , P.A. Greet , P.L. Dyson","doi":"10.1016/0021-9169(96)00007-4","DOIUrl":"10.1016/0021-9169(96)00007-4","url":null,"abstract":"<div>Zenith observations of the oxygen λ1630 nm auroral/airglow emission (produced at an altitude of ∼220 to ∼250 km) were obtained with the Mawson Fabry-Perot Spectrometer (FPS) during three ‘zenith direction only’ observing campaigns in 1993. The data show many instances of strong (50 to 100 m s−1) upwellings in the vertical wind, when the auroral oval is located equatorward of the zenith. Our data appear consistent with the existence of a region of upwelling up to ∼ 4° poleward of the poleward boundary of the visible auroral oval, rather than short duration, explosive heating events. The upwellings are probably the vertical component of wind shear produced by reversal of the zonal thermospheric winds, which occurs near the poleward boundary of the visible auroral oval. Zenith temperature was also seen to increase when the oval was equatorward of Mawson, showing rises of up to 300 K or more. However, this increase is at times unrelated to the upwellings, and seems to be caused by the expansion of the warm polar cap over the observing site.On a number of nights the boundary between the polar cap and the auroral oval was observed to pass over our site several times, occasionally showing a quasi-periodic expansion and contraction. We speculate that this quasi-periodic movement may be related to periodic auroral activity that is known to generate large-scale gravity waves.</div>","PeriodicalId":100754,"journal":{"name":"Journal of Atmospheric and Terrestrial Physics","volume":"58 16","pages":"Pages 1973-1988"},"PeriodicalIF":0.0,"publicationDate":"1996-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0021-9169(96)00007-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53072961","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 35

Simulation of the initial evolution of the CRRES G-9 barium release in the ionosphere CRRES G-9电离层钡释放初始演化的模拟

Journal of Atmospheric and Terrestrial Physics Pub Date : 1996-12-01 DOI: 10.1016/0021-9169(95)00181-6

S.N. Zaitsev, G.P. Milinevsky, A.M. Evtushevsky

引用次数: 1