Search Results - "Callis, L. B."

A strong CME-related magnetic cloud interaction with the Earth's Magnetosphere: ISTP observations of rapid relativistic electron acceleration on May 15, 1997 by Baker, D. N., Pulkkinen, T. I., Li, X., Kanekal, S. G., Ogilvie, K. W., Lepping, R. P., Blake, J. B., Callis, L. B., Rostoker, G., Singer, H. J., Reeves, G. D.

“…A geoeffective magnetic cloud impacted the Earth early on 15 May 1997. The cloud exhibited strong initial southward interplanetary magnetic field (BZ∼−25 nT),…”
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PET: a proton/electron telescope for studies of magnetospheric, solar, and galactic particles by Cook, W.R., Cummings, A.C., Cummings, J.R., Garrard, T.L., Kecman, B., Mewaldt, R.A., Selesnick, R.S., Stone, E.C., Baker, D.N., von Rosenvinge, T.T., Blake, J.B., Callis, L.B.

“…The proton/electron telescope (PET) on SAMPEX (Solar, Anomalous, and Magnetospheric Particle Explorer) is designed to provide measurements of energetic…”
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Ozone variability in the high latitude summer stratosphere by Natarajan, Murali, Callis, Linwood B.

“…Observations made by the HALOE instrument aboard UARS show very low stratospheric ozone in the Arctic and Antarctic summers of 1992 and 1993 [Park and Russell,…”
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Solar-atmospheric coupling by electrons (SOLACE): 3. Comparisons of simulations and observations, 1979-1997, issues and implications by Callis, Linwood B., Natarajan, Murali, Lambeth, James D.

“…Several middle atmospheric simulations have been carried out from January 1979 to December 1997 including most effects important to stratospheric O3. Results…”
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NOy formed by precipitating electron events in 1991 and 1992: Descent into the stratosphere as observed by ISAMS by Callis, Linwood B., Lambeth, James D.

“…NOAA 12 precipitating electron data has been examined together with ISAMS observations of nighttime NO2 during electron events in November 1991 and May 1992…”
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Solar atmospheric coupling by electrons (SOLACE): 2. Calculated stratospheric effects of precipitating electrons, 1979-1988 by Callis, Linwood B., Natarajan, Murali, Lambeth, James D., Baker, Daniel N.

“…An analysis has been carried out of the effects of energetic electron precipitation (EEP) on stratospheric NOy, NO2, and O3. Solar wind observations used…”
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Solar atmospheric coupling by electrons (SOLACE): 1. Effects of the May 12, 1997 solar event on the middle atmosphere by Callis, Linwood B., Natarajan, Murali, Evans, David S., Lambeth, James D.

“…An analysis is carried out of the effects on middle atmospheric NOy and O3 of a coronal mass ejection (CME) event which occurred on May 12, 1997, and which is…”
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Observed and calculated mesospheric NO, 1992–1997 by Callis, Linwood B., Natarajan, Murali, Lambeth, James D.

“…Mesospheric nitric oxide as observed by the Halogen Occultation Experiment (HALOE) and calculated by the Langley Research Center two‐dimensional chemical…”
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Odd nitrogen formed by energetic electron precipitation as calculated from TIROS data by Callis, Linwood B.

“…Daily odd nitrogen formation due to energetic electron precipitation has been calculated for 840101 through 841231. Electron energy spectra between 4.25 and…”
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Comment on "The diffuse aurora: A significant source of ionization in the middle atmosphere" by R. A. Frahm et al by Callis, Linwood B.

“…The paper by Frahm et al. [1997], hereinafter referred to as F97, discussed the use of the Particle Environment Monitor (PEM) electron data to calculate…”
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On the origin of midlatitude ozone changes: Data analysis and simulations for 1979-1993 by Callis, Linwood B., Natarajan, Murali, Lambeth, James D., Boughner, Robert E.

“…Satellite data show large declines in global (4.5%) and midlatitude (10%) ozone in the mid‐1980s and during 1992 and 1993. Analyses of ozone, temperature, and…”
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Ozone and nitrogen dioxide changes in the stratosphere during 1979-84 by Callis, Linwood B., Natarajan, Murali

“…Analyses of stratospheric nitrogen dioxide distributions as measured by four different satellite experiments indicate midlatitude increases of up to 75 percent…”
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Reply by Callis, L B, Natarajan, M, Lambeth, J D

“…In the comment by Siskind [2002] (hereinafter referred to as S01), two things are suggested. S01 suggests that work by Siskind et al. [2000] (hereinafter…”
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Reply by Callis, L B, Natarajan, M, Lambeth, J D

“…In the comment by Siskind [2002] (hereinafter referred to as S01), two things are suggested. S01 suggests that work by Siskind et al. [2000] (hereinafter…”
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Ozone and nitrogen dioxide changes in the stratosphere during 1979-84 by Callis, Linwood B, Natarajan, Murali

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Ozone and Temperature Trends Associated with the 11-Year Solar Cycle by Callis, Linwood B., Natarajan, Murali, Nealy, John E.

“…Evidence is presented which suggests that trends in the ozone concentration and stratospheric temperature, reported between the early 1960's and 1976, are to a…”
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Calculated upper stratospheric effects of solar UV flux and NOY variations during the 11-year solar cycle by Callis, Linwood B., Natarajan, Murali, Lambeth, James D.

“…Model derived sensitivities of O3 near 40 km to solar UV flux changes (11‐year and 27‐day) fall within the range 0.36–0.55 with S11y ≈ S27d. These…”
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SAMPEX: NASA's first small explorer satellite by Mason, G.M., Baker, D.N., Blake, J.B., Boughner, R.E., Callis, L.B., Cummings, A.C., Cummings, J.R., Greenspan, M.E., Hamilton, D.C., Hovestadt, D., Kanekal, S.G., Klecker, B., Leske, R.L., Li, X., Looper, M.D., Mazur, J.E., Mewaldt, R.A., Oetliker, M., Scholer, M., Selesnick, R.S., Stone, E.C., von Rosenvinge, T.T., Williams, D.L.

“…The SAMPEX satellite, an international collaboration with Germany, is the first in a series of small explorer missions that NASA began in 1989 to perform…”
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Solar UV variability: Effects on stratospheric ozone, trace constituents and thermal structure by Natarajan, Murali, Callis, Linwood B., Nealy, John E.

“…The effect of long-term (11-yr solar cycle) solar UV variability upon stratospheric chemical and thermal structure was studied by using a time-dependent…”
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