WorldCat Identities

Summers, Michael E.

Overview
Works: 13 works in 32 publications in 1 language and 1,306 library holdings
Roles: Author, Editor
Publication Timeline
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Most widely held works by Michael E Summers
Exoplanets : diamonds worlds, super-Earths, pulsar planets, and the new search for life beyond our solar system by Michael E Summers( Book )

4 editions published in 2017 in English and held by 706 WorldCat member libraries worldwide

"The past few years have seen an incredible explosion in our knowledge of the universe. Since its 2009 launch, the Kepler satellite has discovered more than two thousand exoplanets, or planets outside our solar system. More exoplanets are being discovered all the time, and even more remarkable than the sheer number of exoplanets is their variety. In Exoplanets, astronomer Michael Summers and physicist James Trefil explore these remarkable recent discoveries: planets revolving around pulsars, planets made of diamond, planets that are mostly water, and numerous rogue planets wandering through the emptiness of space"--NoveList
Atmospheric science across the stratopause( Book )

7 editions published in 2000 in English and held by 231 WorldCat member libraries worldwide

Provides an integrated perspective on the troposphere, stratosphere, mesosphere, and thermosphere that creates a unified vision of atmospheric phenomena. The 27 review articles and research papers discuss chemistry, energetics, dynamics, long term changes, new experiments, and new models relevant to both atmospheric science and space science. Topics include the role of equatorial waves in the semiannual oscillation of the middle atmosphere, optical evidence of energy transport across the stratopause, ground-based microwave observations of middle atmospheric water vapor in the 1990s, and nighttime O2 and O3 profiles measured by MSX/UVISI using stellar occultation techniques. No index. Annotation copyrighted by Book News, Inc., Portland, OR
Exoplanets : diamond worlds, super Earths, pulsar planets, and the new search for life beyond our solar system by Michael E Summers( Recording )

6 editions published in 2017 in English and held by 95 WorldCat member libraries worldwide

New and varied exoplanets are being discovered every day. Astronomer Michael Summers and physicist James Trefil explore these remarkable recent discoveries
Exoplanets : diamon worlds, super earths, pulsar planets, and the new search for life beyond our solar system by Michael E Summers( Book )

1 edition published in 2017 in English and held by 6 WorldCat member libraries worldwide

Atmospheric science across the stratopause( )

1 edition published in 2000 in English and held by 4 WorldCat member libraries worldwide

Atmospheric science across the stratosphere( Book )

1 edition published in 2000 in English and held by 2 WorldCat member libraries worldwide

Discovery of a Water Vapor Layer in the Arctic Summer Mesosphere: Implications for Polar Mesospheric Clouds( Book )

1 edition published in 2001 in English and held by 1 WorldCat member library worldwide

We report the discovery of a layer of enhanced water vapor in the Arctic summer mesosphere that was made utilizing two new techniques for remotely determining water vapor abundances. The first utilizes Middle Atmosphere High Resolution Spectrograph Investigation (MAHRSI) OH measurements as a proxy for water vapor. The second is a reanalysis of Halogen Occultation Experiment (HALOE) water vapor data with a technique to simultaneously determine polar mesospheric cloud (PMC) ice particle extinction along with the water vapor abundance. These results reveal a narrow layer of enhanced water vapor centered between 82-84 km altitude and coincident with PMCs, that exhibits water vapor mixing ratios of 10-15 ppmv. This indicates that a higher degree of supersaturation is present in the PMC region, and that PMCs are thus more efficient at sequestering total water (both ice particles and vapor) within the layer, than previously believed
Atmospheric science across the stratopause( )

1 edition published in 2013 in English and held by 1 WorldCat member library worldwide

THOMAS 2.5 THz Measurements of Middle Atmospheric OH: Comparison With MAHRSI Observations and Model Results( Book )

1 edition published in 2000 in English and held by 1 WorldCat member library worldwide

In this work OH observations of the middle atmosphere performed by the improved 2.5 THz heterodyne spectrometer THOMAS (Tera Hertz OH Measurement Airborne Sounder) during the 1997 THOMAS/MAHRSI (Middle Atmosphere High Resolution Spectrograph investigation) campaign are presented. Results of the THOMAS OH measurements are compared to simultaneous MAHRSI OH observations and to photochemical model calculations using both standard HO(sub x) chemistry and a recently proposed change in HO(sub x) chemistry. The 40 km - 90 km OH column densities measured by THOMAS and MAHRSI show excellent agreement, the 50 km - 90 km OH column densities agree well within the measurement uncertainties throughout the diurnal cycle. The comparison of the observed and modeled OH column densities in the upper stratosphere and mesosphere suggests that neither model is capable of simultaneously reproducing the measurements in both regions
Theoretical studies of Io's atmosphere by Michael E Summers( )

2 editions published in 1985 in English and held by 1 WorldCat member library worldwide

Age of Air in a Zonally Averaged Two-Dimensional Model( )

1 edition published in 1998 in English and held by 0 WorldCat member libraries worldwide

The distribution of age-of-air in a two-dimensional, zonally averaged model of the atmosphere is examined. The age-of-air is determined from mixing ratios of a fictitious tracer with a linearly increasing tropospheric source. The impact of horizontal mixing is isolated by performing parallel calculations with and without horizontal mixing terms in the tracer evolution equation. We examine the evolution of the tracer over several model years, using different tropical heat sources as well as different amounts of planetary wave mixing and drag. Typical ages in the midstratosphere when horizontal mixing is included range from 3 to over 5 years, depending primarily on the strength of the model's prescribed tropical heat source. These values of age are within the range of observational estimates based on long-lived tracers with increasing tropospheric mixing ratios, such as HF, CO2 and SF6. Age determined from the horizontally unmixed tracer is reduced by 1 to 2 years. However, the evolution of the unmixed tracer is consistent with observed behavior of tropical water vapor oscillations in data from the HAlogen Occultation Experiment (HALOE). We found stronger than expected sensitivity of middle atmospheric age to prescribed heating in the tropical troposphere. This sensitivity in our model arises from small resulting changes to the residual vertical velocity in the tropics. These vertical velocity changes are in turn associated with net heating changes of 0.05-0.10 K/d in the tropical lower stratosphere. We argue that changes of this magnitude are within the uncertainties imposed by natural variations in the tropics
The 2.5 THz Heterodyne Spectrometer THOMAS: Measurement of OH in the Middle Atmosphere and Comparison with Photochemical Model Results( )

1 edition published in 2000 in English and held by 0 WorldCat member libraries worldwide

The interpretation of recent odd hydrogen measurements in the stratosphere from balloons and in the mesosphere from space indicates a serious lack of understanding in atmospheric HO(x) chemistry. In order to resolve these persisting problems, coincident measurements of HO(x) molecules and/or measurements that cover both altitude regions are desirable. In this work, the airborne 2.5 THz heterodyne spectrometer Terahertz OH Measurement Airborne Sounder (THOMAS) is introduced. Since the first THOMAS measurements in 1994/1995, the spectrometer was significantly improved by modification or replacement of individual components. The THOMAS instrumental setup and properties are presented together with a retrieval algorithm for atmospheric parameters based on a Phillips-Tikhonov regularization scheme. Furthermore, the results of a complete error assessment are given. In August 1997, during the second CRISTA/MAHRSI campaign (Cryogenic Infrared Spectrometers and Telescopes for the Atmosphere / Middle Atmosphere High Resolution Spectrograph Investigation), OH observations were performed by THOMAS covering altitudes between about 30 and 90 km over a full diurnal cycle. Hydroxyl column densities derived from THOMAS measurements are presented and compared to photochemical model results. The model calculations using the standard HO(x) chemistry systematically show higher values by about 15% for the 40-90 km and 50-90 km OH columns. Moreover, a recently proposed change of an HOx chemistry reaction rate is included into the comparison which, for the same altitude intervals, yields OH column densities that are about 10% lower than the THOMAS measurements. A detailed comparison of the THOMAS and MAHRSI measurements is presented in a separate publication
 
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Audience level: 0.28 (from 0.16 for Exoplanets ... to 0.99 for THOMAS 2.5 ...)

Atmospheric science across the stratopauseAtmospheric science across the stratopauseAtmospheric science across the stratosphere
Languages
English (27)

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Atmospheric science across the stratopauseAtmospheric science across the stratosphere