Search Results - "R. H. Wiens"

Drought alters the trophic role of an opportunistic generalist in an aquatic ecosystem by Amundrud, Sarah L., Clay-Smith, Sarina A., Flynn, Bret L., Higgins, Kathleen E., Reich, Megan S., Wiens, Derek R. H., Srivastava, Diane S.

“…Abiotic change can alter species interactions by modifying species’ trophic roles, but this has not been well studied. Until now, bromeliad-dwelling tipulid…”
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Equatorial plasma bubbles in the ionosphere over Eritrea : occurrence and drift speed by WIENS, R. H, LEDVINA, B. M, KINTNER, P. M, AFEWERKI, M, MULUGHETA, Z

“…An all-sky imager was installed in Asmara, Eritrea (15.4° N, 38.9° E, 7° N dip) and used to monitor the OI 630-nm nightglow. Nine months of data were studied…”
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Development of Optical Mesosphere Thermosphere Imagers (OMTI) by SHIOKAWA, K, KATOH, Y, SATOH, M, EJIRI, M. K, OGAWA, T, NAKAMURA, T, TSUDA, T, WIENS, R. H

“…The Optical Mesosphere Thermosphere Imagers (OMTI) have been developed to investigate the dynamics of the upper atmosphere through nocturnal airglow emissions…”
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Tidal variations of O2 Atmospheric and OH(6-2) airglow and temperature at mid-latitudes from SATI observations by LOPEZ-GONZALEZ, M. J, RODRIGUEZ, E, SHEPHERD, G. G, SARGOYTCHEV, S, SHEPHERD, M. G, AUSHEV, V. M, BROWN, S, GARCIA-COMAS, M, WIENS, R. H

“…Airglow observations with a Spectral Airglow Temperature Imager (SATI), installed at the Sierra Nevada Observatory (37.06° N, 3.38° W) at 2900-m height, have…”
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Springtime transition in lower thermospheric atomic oxygen by Shepherd, G. G., Stegman, J., Espy, P., McLandress, C., Thuillier, G., Wiens, R. H.

“…Observations from three optical ground stations and the wind imaging interferometer on the upper atmosphere research satellite have been combined to describe a…”
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Tidal variations of O 2 Atmospheric and OH(6-2) airglow and temperature at mid-latitudes from SATI observations by López-González, M. J., Rodríguez, E., Shepherd, G. G., Sargoytchev, S., Shepherd, M. G., Aushev, V. M., Brown, S., García-Comas, M., Wiens, R. H.

“…Airglow observations with a Spectral Airglow Temperature Imager (SATI), installed at the Sierra Nevada Observatory (37.06° N, 3.38° W) at 2900-m height, have…”
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Tidal influence on midlatitude airglow: Comparison of satellite and ground-based observations with TIME-GCM predictions by Shepherd, G. G., Roble, R. G., Zhang, S.‐P., McLandress, C., Wiens, R. H.

“…WINDII, the Wind imaging interferometer on the Upper Atmosphere Research Satellite measures winds and emission rates from selected excited metastable species…”
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Photochemistry and dynamics in thermospheric intertropical arcs measured by the WIND Imaging Interferometer on board UARS: A comparison with TIE-GCM simulations by Thuillier, G., Wiens, R.H., Shepherd, G.G., Roble, R.G.

“…The intertropical arcs are bands of enhanced nightglow O(1D) 630nm emission observed at 15° north or south of the magnetic dip equator. Ground-based…”
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Brightness variations of the northern 630nm intertropical arc and the midnight pressure bulge over Eritrea by Wiens, R. H., Habtemichael, S., Andemariam, F., Welday, K., Criswick, J., Brown, S., Sargoytchev, S.

“…The nightglow brightness at 630nm from the thermospheric O(1D) layer was monitored nightly at Asmara, Eritrea (15.4° N, 39.9° E, 7° N dip) with an all-sky…”
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WINDII measurements of nightglow enhancements in the South Atlantic Magnetic Anomaly Zone by Wiens, R. H., Bhatnagar, V. P., Cogger, L. L.

“…Enhancements of the O(¹D) 630 nm and O(¹S) 558 nm volume emission rates were detected by WINDII, the Wind Imaging Interferometer on board the Upper Atmosphere…”
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Nightglow zenith emission rate variations in O(1 S) at low latitudes from wind imaging interferometer (WINDII) observations by Zhang, S. P., Wiens, R. H., Solheim, B. H., Shepherd, G. G.

“…Volume emission rate data of the O(1S) nightglow layer measured by the wind imaging interferometer (WINDII) aboard the Upper Atmosphere Research Satellite…”
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Brightness variations of the northern 630 nm intertropical arc and the midnight pressure bulge over Eritrea by Wiens, R H, Habtemichael, S, Andemariam, F, Welday, K, Criswick, J, Brown, S, Sargoytchev, S

“…The nightglow brightness at 630 nm from the thermospheric O( super(1)D) layer was monitored nightly at Asmara, Eritrea (15.4 degree N, 39.9 degree E, 7 degree…”
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Geomagnetic storm heating effects on the low-latitude dayside thermosphere from WINDII observations at equinox by Wiens, R.H, Bhatnagar, V.P, Thuillier, G

“…The response of the neutral thermosphere to geomagnetic storms is an important aspect of the study of “space weather”. Yet, this response above the magnetic…”
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Statistics of gravity waves seen in O2 nightglow over Bear Lake Observatory by Wiens, R. H., Wang, D. Y., Peterson, R. N., Shepherd, G. G.

“…Fluctuations in the O2 nightglow column emission rate and rotational temperature were measured over Bear Lake Observatory on 63 nights, 11 of them nearly…”
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Ground-based mesospheric temperatures at mid-latitude derived from O2 and OH airglow SATI data : Comparison with SABER measurements by LOPEZ-GONZALEZ, M. J, GARCIA-COMAS, M, RUSSELL, J. M, BROWN, S, CHO, Y.-M, WIENS, R. H, RODRIGUEZ, E, LOPEZ-PUERTAS, M, SHEPHERD, M. G, SHEPHERD, G. G, SARGOYTCHEV, S, AUSHEV, V. M, SMITH, S. M, MLYNCZAK, M. G

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SATI: A spectral airglow temperature imager by Wiens, R.H, Moise, A, Brown, S, Sargoytchev, S, Peterson, R.N, Shepherd, G.G, Lopez-Gonzalez, M.J, Lopez-Moreno, J.J, Rodrigo, R

“…An empirical understanding of planetary scale perturbations in the upper atmosphere is most effectively gained by the complementary use of both satellite and…”
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Seasonal variations of O2 atmospheric and OH(6-2) airglow and temperature at mid-latitudes from SATI observations by LOPEZ-GONZALEZ, M. J, RODRIGUEZ, E, CHO, Y.-M, WIENS, R. H, SHEPHERD, G. G, SARGOYTCHEV, S, BROWN, S, SHEPHERD, M. G, AUSHEV, V. M, LOPEZ-MORENO, J. J, RODRIGO, R

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Coupled longitudinal and tidal variations of equatorial nightglow O(1S) zenith emission rates from WINDII and Christmas Island data by Wiens, R H, Taylor, M J, Zhang, S P, Shepherd, G G

“…Results of a comparison of equatorial nightglow O(1S) zenith emission rates measured by the WINDII Imaging Spectrometer on UARS satellite and by a ground-based…”
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Interference filter spectral imaging of twilight O+(2P-2D) emission by Y. Ma, R. N. Peterson, S. P. Zhang, I. C. McDade, R. H. Wiens, G. G. Shepherd

“…A spectral imager specifically designed to measure the O+(2P-2D) emission in the thermosphere during twilight has been constructed and tested in Toronto…”
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Results of the airglow and temperature observations by MORTI at the Almaty site (43.05N, 76.97E) by Aushev, V.M., Pogoreltsev, A.I., Vodyannikov, V.V., Wiens, R.H., Shepherd, G.G.

“…Preliminary results of analysis of the molecular oxygen nightglow emission rate and rotational temperature observed at Almaty site by the Mesopause Oxygen…”
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