2,642 research outputs found

    Design and Development of an Ultraviolet All-Sky Imaging System

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    T.M. and J.M.-T. were supported by the UK Space Agency projects ST/W00190X/1 and ST/V00610X/1.Peer reviewedPublisher PD

    The challenges and possibilities of earthquake predictions using non-seismic precursors

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    Open Access via the Springer Compact AgreementPeer reviewedPublisher PD

    Wind Forecasts for Rocket and Balloon Launches at the Esrange Space Center Using the WRF Model

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    Atmospheric composition of exoplanets based on the thermal escape of gases and implications for habitability

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    Funding: This research has been funded by the Knut and Alice Wallenberg Foundation, Kempe Foundation, The County Administrative Board of Norrbotten and Luleå University of Technology. M.-P.Z.'s research at CAB has been partially supported by the Spanish State Research Agency (AEI) project no. MDM-2017-0737 Unidad de Excelencia ‘María de Maeztu’- Centro de Astrobiología (INTA-CSIC). Acknowledgements: We thank all the referees for their valuable comments. We are grateful for their constructive remarks, which led to a significant improvement to the manuscript.Peer reviewedPublisher PD

    Calibration of ExoMars 2020 GTS (Ground Temperature Sensor) and its application on two band pyrometry

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    EPSC Abstracts Vol. 13, EPSC-DPS2019-1330-2, 2019 EPSC-DPS Joint Meeting 2019Non peer reviewedPublisher PD

    Correction to "Energy Transport in the Thermosphere During the Solar Storms of April 2002"

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    We present corrected computations of the infrared power and energy radiated by nitric oxide (NO) and carbon dioxide (CO2) during the solar storm event of April 2002. The computations in our previous paper underestimated the radiated power due to improper weighting of the radiated power and energy with respect to area as a function of latitude. We now find that the radiation by NO during the April 2002 storm period accounts for 50% of the estimated energy input to the atmosphere from the solar storm. The prior estimate was 28.5%. Emission computed for CO2 is also correspondingly increased, but the relative roles of CO2 and NO remain unchanged. NO emission enhancement is still, far and away, the dominant infrared response to the solar storms of April 2002

    Sub-liquid and Atmospheric Measurement (SAM) instrument to autonomously monitor the biochemistry of natural aquatic ecosystems

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    Open Access via the ACS Agreement Ministerio de Ciencia e Innovación - PID2019-104205GB-C21; University of Aberdeen - SF10237-59 Funding This development work of the SAM instrument was undertaken with the help of the University of Aberdeen’s Round 3 of the “Internal Funding to Pump-Prime Interdisciplinary Research and Impact Activities” (SF10237–59) in 2021/22 and Dr. Allan and Norma Young Foundation “Lab starting grant” (CF95052-11). M.-P.Z. was supported by grant PID2019-104205GB-C21 funded by MCIN/AEI/v10.13039/501100011033. Acknowledgments The authors would like to acknowledge the support from the Allan and Norma Young Foundation. They thank and recognize the collaboration with the STFC-funded Boulby Underground Laboratory in Boulby Mine, North Yorkshire, UK, for providing access to deploy the SAM instrument in the brine pool at their facility. They also thank collaborators Dr. Deepak Kumaresan from Queen’s University Belfast and Alexandra Hillebrand-Voiculescu and Catalina Haidau from ″Emil Racovita″ Institute of Speleology, for the campaign to the sulfidic lake and Movile Cave in Mangalia, Romania, in October 2022 and for further testing and deployment of the SAM instrument.Peer reviewedPublisher PD

    Mid-Infrared Spectroscopy of Uranus from the Spitzer Infrared Spectrometer: 2. Determination of the Mean Composition of the Upper Troposphere and Stratosphere

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    Mid-infrared spectral observations Uranus acquired with the Infrared Spectrometer (IRS) on the Spitzer Space Telescope are used to determine the abundances of C2H2, C2H6, CH3C2H, C4H2, CO2, and tentatively CH3 on Uranus at the time of the 2007 equinox. For vertically uniform eddy diffusion coefficients in the range 2200-2600 cm2 s-1, photochemical models that reproduce the observed methane emission also predict C2H6 profiles that compare well with emission in the 11.6-12.5 micron wavelength region, where the nu9 band of C2H6 is prominent. Our nominal model with a uniform eddy diffusion coefficient Kzz = 2430 cm2 sec-1 and a CH4 tropopause mole fraction of 1.6x10-5 provides a good fit to other hydrocarbon emission features, such as those of C2H2 and C4H2, but the model profile for CH3C2H must be scaled by a factor of 0.43, suggesting that improvements are needed in the chemical reaction mechanism for C3Hx species. The nominal model is consistent with a CH3D/CH4 ratio of 3.0+-0.2x10-4. From the best-fit scaling of these photochemical-model profiles, we derive column abundances above the 10-mbar level of 4.5+01.1/-0.8 x 10+19 molecule-cm-2 for CH4, 6.2 +- 1.0 x 10+16 molecule-cm-2 for C2H2 (with a value 24% higher from a different longitudinal sampling), 3.1 +- 0.3 x 10+16 molecule-cm-2 for C2H6, 8.6 +- 2.6 x 10+13 molecule-cm-2 for CH3C2H, 1.8 +- 0.3 x 10+13 molecule-cm-2 for C4H2, and 1.7 +- 0.4 x 10+13 molecule-cm-2 for CO2 on Uranus. Our results have implications with respect to the influx rate of exogenic oxygen species and the production rate of stratospheric hazes on Uranus, as well as the C4H2 vapor pressure over C4H2 ice at low temperatures

    Distribution and Morphologies of Transverse Aeolian Ridges in ExoMars 2020 Rover Landing Site

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    We thank the efforts of the guest editor and the reviewers for their suggestions in improving the paper. We acknowledge the Wallenberg Foundation and the Kempe Foundation for supporting our Mars research activities in general. We thank Scott Nowicki for providing us the TES-derived rock abundance global dataset for Mars. We thank NASA, JPL, and University of Arizona for providing HiRISE images and DTMs free of charge. The maps in various figures have been created using ArcGIS version 10.6.1 (http://desktop.arcgis.com/en/arcmap/latest/get-started/setup/arcgis-desktop-quick-start-guide.htm).Peer reviewedPublisher PD
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