Search Results - "Espy, P. J"

Observations of planetary waves in the mesosphere-lower thermosphere during stratospheric warming events by Stray, N H, Orsolini, Y J, Espy, P J, Limpasuvan, V, Hibbins, R E

“…This study investigates the effect of stratospheric sudden warmings (SSWs) on planetary wave (PW) activity in the mesosphere–lower thermosphere (MLT). PW…”
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Observations of gravity wave forcing of the mesopause region during the January 2013 major Sudden Stratospheric Warming by de Wit, R. J., Hibbins, R. E., Espy, P. J., Orsolini, Y. J., Limpasuvan, V., Kinnison, D. E.

“…Studies of vertical and interhemispheric coupling during Sudden Stratospheric Warmings (SSWs) suggest that gravity wave (GW) momentum flux divergence plays a…”
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Coupling in the middle atmosphere related to the 2013 major sudden stratospheric warming by de Wit, R. J., Hibbins, R. E., Espy, P. J., Hennum, E. A.

“…The previously reported observation of anomalous eastward gravity wave forcing at mesopause heights around the onset of the January 2013 major sudden…”
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Characteristics and sources of gravity waves observed in noctilucent cloud over Norway by Demissie, T. D, Espy, P. J, Kleinknecht, N. H, Hatlen, M, Kaifler, N, Baumgarten, G

“…Four years of noctilucent cloud (NLC) images from an automated digital camera in Trondheim and results from a ray-tracing model are used to extend the…”
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SuperDARN Observations of Semidiurnal Tidal Variability in the MLT and the Response to Sudden Stratospheric Warming Events by Hibbins, R. E., Espy, P. J., Orsolini, Y. J., Limpasuvan, V., Barnes, R. J.

“…Using meteor wind data from the Super Dual Auroral Radar Network (SuperDARN) in the Northern Hemisphere, we (1) demonstrate that the migrating…”
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The role of the QBO in the inter-hemispheric coupling of summer mesospheric temperatures by Espy, P. J., Ochoa Fernández, S., Forkman, P., Murtagh, D., Stegman, J.

“…Inter-hemispheric coupling between the polar summer mesosphere and planetary-wave activity in the extra-tropical winter stratosphere has recently been inferred…”
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Quasi-biennial modulation of the semidiurnal tide in the upper mesosphere above Halley, Antarctica by Hibbins, R. E., Espy, P. J., Jarvis, M. J.

“…We present an analysis of a long‐term archive of horizontal wind data derived from meteor wind observations from a SuperDARN radar at Halley, Antarctica (76°S,…”
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Atmospheric ozone above Troll station, Antarctica observed by a ground based microwave radiometer by Daae, M, Straub, C, Espy, P. J, Newnham, D. A

“…This paper describes the stratospheric and mesospheric ozone profiles retrieved from spectral measurements of the 249.96 GHz O3 line, using the British…”
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Interannual variability of mesopause zonal winds over Ascension Island: Coupling to the stratospheric QBO by de Wit, R. J., Hibbins, R. E., Espy, P. J., Mitchell, N. J.

“…Zonal‐wind measurements obtained between October 2001 and July 2011 with the SKiYMET meteor radar located at Ascension Island (8°S, 14°W) have been used to…”
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Seasonal variations of the gravity wave momentum flux in the Antarctic mesosphere and lower thermosphere by Espy, P. J., Jones, G. O. L., Swenson, G. R., Tang, J., Taylor, M. J.

“…Airglow imager and dynasonde/imaging Doppler interferometer (IDI) radar wind measurements at Halley Station, Antarctica (75.6°S, 26.6°W) have been used to…”
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Mesospheric planetary waves over Antarctica during 2002 by Espy, P. J., Hibbins, R. E., Riggin, D. M., Fritts, D. C.

“…Wind measurements from a series of atmospheric radars located around Antarctica have been used to characterize the mesospheric planetary‐wave field during the…”
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Seasonal variation in the correlation of airglow temperature and emission rate by Espy, P. J., Stegman, J., Forkman, P., Murtagh, D.

“…The hydroxyl (OH) rotational temperature and band emission rate have been derived using year‐round, ground‐based measurements of the infrared OH nightglow from…”
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Mesospheric CO above Troll station, Antarctica observed by a ground based microwave radiometer by Straub, C, Espy, P. J, Hibbins, R. E, Newnham, D. A

“…This paper presents mesospheric carbon monoxide (CO) data acquired by the ground-based microwave radiometer of the British Antarctic Survey (BAS radiometer)…”
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Quasi-16-day period oscillations observed in middle atmospheric ozone and temperature in Antarctica by Demissie, T. D., Kleinknecht, N. H., Hibbins, R. E., Espy, P. J., Straub, C.

“…Nightly averaged mesospheric temperature derived from the hydroxyl nightglow at Rothera station (67°34' S, 68°08' W) and nightly midnight measurements of ozone…”
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Regional variations of mesospheric gravity-wave momentum flux over Antarctica by ESPY, P. J, HIBBINS, R. E, SWENSON, G. R, TANG, J, TAYLOR, M. J, RIGGIN, D. M, FRITTS, D. C

“…Images of mesospheric airglow and radar-wind measurements have been combined to estimate the difference in the vertical flux of horizontal momentum carried by…”
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Planetary wave coupling from the stratosphere to the thermosphere during the 2002 Southern Hemisphere pre-stratwarm period by Palo, S. E., Forbes, J. M., Zhang, X., Russell III, J. M., Mertens, C. J., Mlynczak, M. G., Burns, G. B., Espy, P. J., Kawahara, T. D.

“…Temperature observations between 20 and 120 km from the SABER instrument on the TIMED spacecraft are used to investigate the nature of planetary wave activity…”
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Electrojet Estimates From Mesospheric Magnetic Field Measurements by Laundal, K. M., Yee, J. H., Merkin, V. G., Gjerloev, J. W., Vanhamäki, H., Reistad, J. P., Madelaire, M., Sorathia, K., Espy, P. J.

“…The auroral electrojet is traditionally measured remotely with magnetometers on ground or in low Earth orbit (LEO). The sparse distribution of measurements,…”
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Interannual variations of the quasi-16-day oscillation in the polar summer mesospheric temperature by Espy, P. J., Stegman, J., Witt, G.

“…Nighttime measurements of the hydroxyl Meinel (4,2) rotational band have been used to infer the mesospheric temperature over Scandinavia from June to August…”
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Rapid, large-scale temperature changes in the polar mesosphere and their relationship to meridional flows by Espy, P. J., Hibbins, R. E., Jones, G. O. L., Riggin, D. M., Fritts, D. C.

“…Mesospheric temperatures derived from spectroscopic measurements of the hydroxyl (OH) nightglow have been observed from Rothera (67.6°S, 68.1°W) and Halley…”
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Seasonal variations in the horizontal wind structure from 0-100 km above Rothera station, Antarctica (67° S, 68° W) by Hibbins, R. E., Shanklin, J. D., Espy, P. J., Jarvis, M. J., Riggin, D. M., Fritts, D. C., Lübken, F.-J.

“…A medium frequency spaced-antenna radar has been operating at Rothera station, Antarctica (67° S, 68° W) for two periods, between 1997-1998 and since 2002,…”
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