Articles | Volume 39, issue 1
https://doi.org/10.5194/angeo-39-255-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/angeo-39-255-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
ANGEO Communicates
| 
26 Feb 2021
ANGEO Communicates |
| 26 Feb 2021
| 26 Feb 2021
Semi-annual variation of excited hydroxyl emission at mid-latitudes
Mykhaylo Grygalashvyly
CORRESPONDING AUTHOR
Leibniz Institute of Atmospheric Physics, University Rostock, Schloss-Str. 6, 18225 Ostseebad Kühlungsborn, Germany
Alexander I. Pogoreltsev
Department of Meteorological Forecasting, Russian State Hydrometeorological University (RSHU), Saint Petersburg, Russia
Alexey B. Andreyev
Institute of the Ionosphere, National Center for Space Research and Technology, Almaty, Kazakhstan
Sergei P. Smyshlyaev
Department of Meteorological Forecasting, Russian State Hydrometeorological University (RSHU), Saint Petersburg, Russia
Gerd R. Sonnemann
Leibniz Institute of Atmospheric Physics, University Rostock, Schloss-Str. 6, 18225 Ostseebad Kühlungsborn, Germany
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Ashique Vellalassery, Gerd Baumgarten, Mykhaylo Grygalashvyly, and Franz-Josef Lübken
Ann. Geophys., 41, 289–300, https://doi.org/10.5194/angeo-41-289-2023, https://doi.org/10.5194/angeo-41-289-2023, 2023
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The solar cycle affects the H2O concentration in the upper mesosphere mainly in two ways: directly through photolysis and, at the time and place of NLC formation, indirectly through temperature changes. The H2O–Lyman-α response is modified by NLC formation, resulting in a positive response at the ice formation region (due to the temperature change effect on the ice formation rate) and a negative response at the sublimation zone (due to the photolysis effect).
Boris Strelnikov, Martin Eberhart, Martin Friedrich, Jonas Hedin, Mikhail Khaplanov, Gerd Baumgarten, Bifford P. Williams, Tristan Staszak, Heiner Asmus, Irina Strelnikova, Ralph Latteck, Mykhaylo Grygalashvyly, Franz-Josef Lübken, Josef Höffner, Raimund Wörl, Jörg Gumbel, Stefan Löhle, Stefanos Fasoulas, Markus Rapp, Aroh Barjatya, Michael J. Taylor, and Pierre-Dominique Pautet
Atmos. Chem. Phys., 19, 11443–11460, https://doi.org/10.5194/acp-19-11443-2019, https://doi.org/10.5194/acp-19-11443-2019, 2019
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Sounding rockets are the only means of measuring small-scale structures (i.e., spatial scales of kilometers to centimeters) in the Earth's middle atmosphere (50–120 km). We present and analyze brand-new high-resolution measurements of atomic oxygen (O) concentration together with high-resolution measurements of ionospheric plasma and neutral air parameters. We found a new behavior of the O inside turbulent layers, which might be essential to adequately model weather and climate.
Mykhaylo Grygalashvyly, Martin Eberhart, Jonas Hedin, Boris Strelnikov, Franz-Josef Lübken, Markus Rapp, Stefan Löhle, Stefanos Fasoulas, Mikhail Khaplanov, Jörg Gumbel, and Ekaterina Vorobeva
Atmos. Chem. Phys., 19, 1207–1220, https://doi.org/10.5194/acp-19-1207-2019, https://doi.org/10.5194/acp-19-1207-2019, 2019
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Based on rocket-borne true common volume observations of atomic oxygen, atmospheric band emission (762 nm), and background atmosphere density and temperature, one-step, two-step, and combined mechanisms of
O2(b1Σg+) formation were analyzed. We found new coefficients for the fit function based on self-consistent temperature, atomic oxygen, and volume emission observations. This can be used for atmospheric band volume emission modeling or the estimation of atomic oxygen by known volume emission.
Mikhail Y. Kulikov, Mikhail V. Belikovich, Mykhaylo Grygalashvyly, Gerd R. Sonnemann, Tatiana S. Ermakova, Anton A. Nechaev, and Alexander M. Feigin
Ann. Geophys., 35, 677–682, https://doi.org/10.5194/angeo-35-677-2017, https://doi.org/10.5194/angeo-35-677-2017, 2017
M. Grygalashvyly
Ann. Geophys., 33, 923–930, https://doi.org/10.5194/angeo-33-923-2015, https://doi.org/10.5194/angeo-33-923-2015, 2015
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The expressions that determine the altitude and number density at peak of the OH* layer were derived. OH* number density in the vicinity of the OH* layer is directly proportional to the atomic oxygen concentration and inversely proportional to the power of temperature. The peak of the layer number density is anti-correlated with the height of the peak. Atomic oxygen is responsible for the vertical separation of sub-layers with different vibrational numbers, and for the distance between them.
G. R. Sonnemann and M. Grygalashvyly
Ann. Geophys., 32, 277–283, https://doi.org/10.5194/angeo-32-277-2014, https://doi.org/10.5194/angeo-32-277-2014, 2014
G. R. Sonnemann and M. Grygalashvyly
Ann. Geophys., 31, 1591–1596, https://doi.org/10.5194/angeo-31-1591-2013, https://doi.org/10.5194/angeo-31-1591-2013, 2013
Ashique Vellalassery, Gerd Baumgarten, Mykhaylo Grygalashvyly, and Franz-Josef Lübken
Ann. Geophys., 41, 289–300, https://doi.org/10.5194/angeo-41-289-2023, https://doi.org/10.5194/angeo-41-289-2023, 2023
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The solar cycle affects the H2O concentration in the upper mesosphere mainly in two ways: directly through photolysis and, at the time and place of NLC formation, indirectly through temperature changes. The H2O–Lyman-α response is modified by NLC formation, resulting in a positive response at the ice formation region (due to the temperature change effect on the ice formation rate) and a negative response at the sublimation zone (due to the photolysis effect).
Andrey V. Koval, Wen Chen, Ksenia A. Didenko, Tatiana S. Ermakova, Nikolai M. Gavrilov, Alexander I. Pogoreltsev, Olga N. Toptunova, Ke Wei, Anna N. Yarusova, and Anton S. Zarubin
Ann. Geophys., 39, 357–368, https://doi.org/10.5194/angeo-39-357-2021, https://doi.org/10.5194/angeo-39-357-2021, 2021
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Numerical modelling is used to simulate atmospheric circulation and calculate residual mean meridional circulation (RMC) during sudden stratospheric warming (SSW) events. Calculating the RMC is used to take into account wave effects on the transport of atmospheric quantities and gas species in the meridional plane. The results show that RMC undergoes significant changes at different stages of SSW and contributes to SSW development.
Sergei P. Smyshlyaev, Pavel N. Vargin, Alexander N. Lukyanov, Natalia D. Tsvetkova, and Maxim A. Motsakov
Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2021-11, https://doi.org/10.5194/acp-2021-11, 2021
Revised manuscript not accepted
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The dynamical processes and changes in Arctic ozone during the winter-spring season 2019–2020 were analyzed using ozonesondes, reanalysis data and numerical experiments with chemistry-transport and trajectory models. The results of numerical experiments indicated that dynamical processes predominate in ozone loss, and the chemical ozone depletion is determined not only by heterogeneous processes on the surface of the polar stratospheric clouds, but by the gas-phase destruction as well.
Alexander Kurganskiy, Carsten Ambelas Skjøth, Alexander Baklanov, Mikhail Sofiev, Annika Saarto, Elena Severova, Sergei Smyshlyaev, and Eigil Kaas
Atmos. Chem. Phys., 20, 2099–2121, https://doi.org/10.5194/acp-20-2099-2020, https://doi.org/10.5194/acp-20-2099-2020, 2020
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The aim of the study was to evaluate three birch pollen source maps using a state-of-the-art atmospheric model Enviro-HIRLAM. Enviro-HIRLAM is a so-called online model where both weather and air pollution are calculated at all time steps.
The evaluation has been performed for 12 pollen observation sites located in Denmark, Finland, and Russia.
Boris Strelnikov, Martin Eberhart, Martin Friedrich, Jonas Hedin, Mikhail Khaplanov, Gerd Baumgarten, Bifford P. Williams, Tristan Staszak, Heiner Asmus, Irina Strelnikova, Ralph Latteck, Mykhaylo Grygalashvyly, Franz-Josef Lübken, Josef Höffner, Raimund Wörl, Jörg Gumbel, Stefan Löhle, Stefanos Fasoulas, Markus Rapp, Aroh Barjatya, Michael J. Taylor, and Pierre-Dominique Pautet
Atmos. Chem. Phys., 19, 11443–11460, https://doi.org/10.5194/acp-19-11443-2019, https://doi.org/10.5194/acp-19-11443-2019, 2019
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Sounding rockets are the only means of measuring small-scale structures (i.e., spatial scales of kilometers to centimeters) in the Earth's middle atmosphere (50–120 km). We present and analyze brand-new high-resolution measurements of atomic oxygen (O) concentration together with high-resolution measurements of ionospheric plasma and neutral air parameters. We found a new behavior of the O inside turbulent layers, which might be essential to adequately model weather and climate.
Mykhaylo Grygalashvyly, Martin Eberhart, Jonas Hedin, Boris Strelnikov, Franz-Josef Lübken, Markus Rapp, Stefan Löhle, Stefanos Fasoulas, Mikhail Khaplanov, Jörg Gumbel, and Ekaterina Vorobeva
Atmos. Chem. Phys., 19, 1207–1220, https://doi.org/10.5194/acp-19-1207-2019, https://doi.org/10.5194/acp-19-1207-2019, 2019
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Based on rocket-borne true common volume observations of atomic oxygen, atmospheric band emission (762 nm), and background atmosphere density and temperature, one-step, two-step, and combined mechanisms of
O2(b1Σg+) formation were analyzed. We found new coefficients for the fit function based on self-consistent temperature, atomic oxygen, and volume emission observations. This can be used for atmospheric band volume emission modeling or the estimation of atomic oxygen by known volume emission.
Yury M. Timofeyev, Sergei P. Smyshlyaev, Yana A. Virolainen, Alexander S. Garkusha, Alexander V. Polyakov, Maxim A. Motsakov, and Ole Kirner
Ann. Geophys., 36, 1495–1505, https://doi.org/10.5194/angeo-36-1495-2018, https://doi.org/10.5194/angeo-36-1495-2018, 2018
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Atmospheric ozone plays a vital role, absorbing the ultraviolet solar radiation and heating the air, thus forming the stratosphere itself. If not absorbed, UV radiation would reach Earth's surface in amounts that are harmful to a variety of lifeforms. Climate change may lead to increasing ozone depletion, especially in the Arctic. Observation and prediction of the ozone variability are crucial for the investigation of its nature and the prediction of potential increase in surface UV radiation.
Christoph Jacobi, Tatiana Ermakova, Daniel Mewes, and Alexander I. Pogoreltsev
Adv. Radio Sci., 15, 199–206, https://doi.org/10.5194/ars-15-199-2017, https://doi.org/10.5194/ars-15-199-2017, 2017
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There is continuous interest in coupling processes between the lower and middle atmosphere. Here we analyse midlatitude winds measured by radar at 82–97 km and find that especially in February they are positively correlated with El Niño. The signal is strong for the upper altitudes accessible to the radar, but weakens below. The observations can be qualitatively reproduced by numerical experiments using a mechanistic global circulation model.
Mikhail Y. Kulikov, Mikhail V. Belikovich, Mykhaylo Grygalashvyly, Gerd R. Sonnemann, Tatiana S. Ermakova, Anton A. Nechaev, and Alexander M. Feigin
Ann. Geophys., 35, 677–682, https://doi.org/10.5194/angeo-35-677-2017, https://doi.org/10.5194/angeo-35-677-2017, 2017
M. Grygalashvyly
Ann. Geophys., 33, 923–930, https://doi.org/10.5194/angeo-33-923-2015, https://doi.org/10.5194/angeo-33-923-2015, 2015
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The expressions that determine the altitude and number density at peak of the OH* layer were derived. OH* number density in the vicinity of the OH* layer is directly proportional to the atomic oxygen concentration and inversely proportional to the power of temperature. The peak of the layer number density is anti-correlated with the height of the peak. Atomic oxygen is responsible for the vertical separation of sub-layers with different vibrational numbers, and for the distance between them.
A. V. Koval, N. M. Gavrilov, A. I. Pogoreltsev, and E. N. Savenkova
Geosci. Model Dev. Discuss., https://doi.org/10.5194/gmdd-8-5643-2015, https://doi.org/10.5194/gmdd-8-5643-2015, 2015
Revised manuscript not accepted
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We implemented improved parameterizations of orographic gravity wave dynamical and thermal effects and QBO flows into a general circulation model and study the sensitivity of meridional circulation and vertical velocity to the parameterizations at altitudes up to 100km. Stationary OGW effects gives changes up to 40% in the meridional velocity and associated ozone fluxes in the stratosphere. Transitions from the easterly to westerly QBO phase may alter meridional and vertical velocities by 60%.
G. R. Sonnemann and M. Grygalashvyly
Ann. Geophys., 32, 277–283, https://doi.org/10.5194/angeo-32-277-2014, https://doi.org/10.5194/angeo-32-277-2014, 2014
G. R. Sonnemann and M. Grygalashvyly
Ann. Geophys., 31, 1591–1596, https://doi.org/10.5194/angeo-31-1591-2013, https://doi.org/10.5194/angeo-31-1591-2013, 2013
Related subject area
Subject: Terrestrial atmosphere and its relation to the sun | Keywords: Airglow
Terrestrial exospheric dayside H-density profile at 3–15 RE from UVIS/HDAC and TWINS Lyman-α data combined
Sporadic auroras near the geomagnetic equator: in the Philippines, on 27 October 1856
Jochen H. Zoennchen, Hyunju K. Connor, Jaewoong Jung, Uwe Nass, and Hans J. Fahr
Ann. Geophys., 40, 271–279, https://doi.org/10.5194/angeo-40-271-2022, https://doi.org/10.5194/angeo-40-271-2022, 2022
Short summary
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Exospheric Ly-α observations of UVIS/HDAC at CASSINI on its Earth swing-by and TWINS are combined to derive the exospheric H-density profile of the ecliptic dayside between 3–15 RE. At 10 RE nH=35 cm−3 is found in the vicinity of the subsolar point for quiet space weather conditions. Also a faster radial fall of the dayside H density above 8 RE (r−3) compared to lower distances of 3–7 RE (r−2.37) is found and possibly indicates enhanced loss of H atoms near the magnetopause and beyond.
Hisashi Hayakawa, José M. Vaquero, and Yusuke Ebihara
Ann. Geophys., 36, 1153–1160, https://doi.org/10.5194/angeo-36-1153-2018, https://doi.org/10.5194/angeo-36-1153-2018, 2018
Short summary
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A record has been found of an "aurora" observed on 27 October 1856 in the Philippines, practically at the magnetic equator. An analysis of this report indicates that it could belong to a "sporadic aurora" because of low magnetic activity at that time. We provide a possible physical mechanism that could explain the appearance of this sporadic, low-latitude aurora, according to the analyses on the observational report and magnetic observations at that time.
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Short summary
Ground-based observations show a phase shift in semi-annual variation of excited hydroxyl emissions at mid-latitudes compared to those at low latitudes. This differs from the annual cycle at high latitudes. We found that this shift in the semi-annual cycle is determined mainly by the superposition of annual variations of T and O concentration. The winter peak for emission is determined exclusively by atomic oxygen concentration, whereas the summer peak is the superposition of all impacts.
Ground-based observations show a phase shift in semi-annual variation of excited hydroxyl...
