David Newnham
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View article: Ground-based Ku-band microwave observations of ozone in the polar middle atmosphere
Ground-based Ku-band microwave observations of ozone in the polar middle atmosphere Open
Ground-based observations of 11.072 GHz atmospheric ozone (O3) emission have been made using the Ny-Ålesund Ozone in the Mesosphere Instrument (NAOMI) at the UK Arctic Research Station (latitude 78∘55′0′′ N, longitude 11∘55′59′′ E), Spitsb…
View article: Comparison of ground-based 11.072 GHz microwave observations of Arctic polar MLT ozone with SABER datasets
Comparison of ground-based 11.072 GHz microwave observations of Arctic polar MLT ozone with SABER datasets Open
<p>Ground-based observations of the ozone (O<sub>3</sub>) emission line at 11.072&#160;GHz have been made using the Ny &#197;lesund Ozone in the Mesosphere Instrument (NAOMI) at the UK Arctic Research Station (lat…
View article: Reply on RC1
Reply on RC1 Open
Abstract. Ground-based observations of 11.072âGHz atmospheric ozone (O3) emission have been made using the Ny-à lesund Ozone in the Mesosphere Instrument (NAOMI) at the UK Arctic Research Station (latitude 78â55â²0â²â²âN, longitud…
View article: Reply on RC2
Reply on RC2 Open
Abstract. Ground-based observations of 11.072âGHz atmospheric ozone (O3) emission have been made using the Ny-à lesund Ozone in the Mesosphere Instrument (NAOMI) at the UK Arctic Research Station (latitude 78â55â²0â²â²âN, longitud…
View article: Comment on amt-2021-339
Comment on amt-2021-339 Open
Abstract. Ground-based observations of 11.072âGHz atmospheric ozone (O3) emission have been made using the Ny-à lesund Ozone in the Mesosphere Instrument (NAOMI) at the UK Arctic Research Station (latitude 78â55â²0â²â²âN, longitud…
View article: Comment on amt-2021-339
Comment on amt-2021-339 Open
Abstract. Ground-based observations of 11.072âGHz atmospheric ozone (O3) emission have been made using the Ny-à lesund Ozone in the Mesosphere Instrument (NAOMI) at the UK Arctic Research Station (latitude 78â55â²0â²â²âN, longitud…
View article: Ground-based Ku-band microwave observations of ozone in the polar middle atmosphere
Ground-based Ku-band microwave observations of ozone in the polar middle atmosphere Open
Ground based observations of 11.072 GHz atmospheric ozone (O3) emission have been made using the Ny Ålesund Ozone in the Mesosphere Instrument (NAOMI) at the UK Arctic Research Station (latitude 78°55’0” N, longitude 11°55’59” E), Spitsber…
View article: Spatial Distributions of Nitric Oxide in the Antarctic Wintertime Middle Atmosphere During Geomagnetic Storms
Spatial Distributions of Nitric Oxide in the Antarctic Wintertime Middle Atmosphere During Geomagnetic Storms Open
Energetic electron precipitation leads to increased nitric oxide (NO) production in the mesosphere and lower thermosphere. NO distributions in the wintertime, high‐latitude Southern Hemisphere atmosphere during geomagnetic storms are inves…
View article: The Effect of Ozone Shadowing on the <i>D</i> Region Ionosphere During Sunrise
The Effect of Ozone Shadowing on the <i>D</i> Region Ionosphere During Sunrise Open
Diurnal very low frequency subionospheric radio wave phase measurements show a night‐to‐day transition pattern. During this sunrise transition a phase perturbation, which consist of a phase overshoot followed by a small phase recovery to n…
View article: Simulation study for ground-based Ku-band microwave observations of ozone and hydroxyl in the polar middle atmosphere
Simulation study for ground-based Ku-band microwave observations of ozone and hydroxyl in the polar middle atmosphere Open
The Ku-band microwave frequencies (10.70–14.25 GHz) overlap emissions from ozone (O3) at 11.072 GHz and hydroxyl radical (OH) at 13.441 GHz. These important chemical species in the polar middle atmosphere respond strongly to high-latitude …
View article: D‐Region High‐Latitude Forcing Factors
D‐Region High‐Latitude Forcing Factors Open
The subionospheric very low frequency (VLF) radio wave technique provides the possibility of investigating the response of the ionospheric D‐region to a diversity of transient and long‐term physical phenomena originating from above (e.g., …
View article: Simulation study for ground-based Ku-band microwave observations of ozone and hydroxyl in the polar middle atmosphere
Simulation study for ground-based Ku-band microwave observations of ozone and hydroxyl in the polar middle atmosphere Open
The Ku-band microwave frequencies (10.70–14.25 GHz) overlap emissions from ozone (O3) at 11.072 GHz and hydroxyl radical (OH) at 13.441 GHz. These important chemical species in the polar middle atmosphere respond strongly to high latitude …
View article: Observations and Modeling of Increased Nitric Oxide in the Antarctic Polar Middle Atmosphere Associated With Geomagnetic Storm‐Driven Energetic Electron Precipitation
Observations and Modeling of Increased Nitric Oxide in the Antarctic Polar Middle Atmosphere Associated With Geomagnetic Storm‐Driven Energetic Electron Precipitation Open
Nitric oxide (NO) produced in the polar middle and upper atmosphere by energetic particle precipitation depletes ozone in the mesosphere and, following vertical transport in the winter polar vortex, in the stratosphere. Medium‐energy elect…
View article: Simulation of submillimetre atmospheric spectra for characterising potential ground-based remote sensing observations
Simulation of submillimetre atmospheric spectra for characterising potential ground-based remote sensing observations Open
The submillimetre is an understudied region of the Earth's atmospheric electromagnetic spectrum. Prior technological gaps and relatively high opacity due to the prevalence of rotational water vapour lines at these wavelengths have slowed p…
View article: <i>D</i> -region ion–neutral coupled chemistry (Sodankylä IonChemistry, SIC) within the Whole Atmosphere Community Climate Model (WACCM 4)– WACCM-SIC and WACCM-rSIC
<i>D</i> -region ion–neutral coupled chemistry (Sodankylä IonChemistry, SIC) within the Whole Atmosphere Community Climate Model (WACCM 4)– WACCM-SIC and WACCM-rSIC Open
This study presents a new ion–neutral chemical model coupled into the Whole Atmosphere Community Climate Model (WACCM). The ionospheric D-region (altitudes ∼ 50–90 km) chemistry is based on the Sodankylä Ion Chemistry (SIC) model, a one-di…
View article: Simulation study for measurement of horizontal wind profiles in the polarstratosphere and mesosphere using ground-based observations of ozone andcarbon monoxide lines in the 230–250 GHz region
Simulation study for measurement of horizontal wind profiles in the polarstratosphere and mesosphere using ground-based observations of ozone andcarbon monoxide lines in the 230–250 GHz region Open
Meteorological and atmospheric models are being extended up to 80 km altitude but there are very few observing techniques that can measure stratospheric–mesospheric winds at altitudes between 20 and 80 km to verify model datasets. Here we …
View article: Simulation of sub-millimetre atmospheric spectra for characterizing potential ground-based remote sensing observations
Simulation of sub-millimetre atmospheric spectra for characterizing potential ground-based remote sensing observations Open
The sub-millimetre is an understudied region of the Earth's atmospheric electromagnetic spectrum. Prior technological gaps and relatively high opacity due to the prevalence of rotational water vapour lines at these wavelengths have slowed …
View article: Supplementary material to " <i>D</i> region ion-neutral coupled chemistry within a whole atmosphere chemistry-climate model"
Supplementary material to " <i>D</i> region ion-neutral coupled chemistry within a whole atmosphere chemistry-climate model" Open
Reaction 2,3 A 4 n E 5 Source[1] 6 Comments, recommendations RPE(1) O + + e -→ O + hv 4×10 -10 0.7 0 RPE(2) O 2 + + e -→ 2O 1.9×10 -7 0.7 0 [2] Rate coefficient measured over the temperature range of 100-1200K RPE(3) O 4 + + e -→ 2O 2 4.2×…
View article: <i>D</i> region ion-neutral coupled chemistry within a whole atmosphere chemistry-climate model
<i>D</i> region ion-neutral coupled chemistry within a whole atmosphere chemistry-climate model Open
This study presents a new ion-neutral chemical model coupled into the Whole Atmosphere Community Climate Model (WACCM). The ionospheric D region (altitudes ~ 50–90 km) chemistry is based on the Sodankylä Ion and Neutral Chemistry (SIC) mod…
View article: Measurement of horizontal wind profiles in the polar stratosphere and mesosphere using ground based observations of ozone and carbon monoxide lines in the 230–250 GHz region: Proof of concept
Measurement of horizontal wind profiles in the polar stratosphere and mesosphere using ground based observations of ozone and carbon monoxide lines in the 230–250 GHz region: Proof of concept Open
Meteorological and atmospheric models are being extended up to 80 km altitude but there are very few observing techniques that can measure stratospheric-mesospheric winds at altitudes between 20 km and 80 km to verify model data-sets. Here…
View article: Substorm‐induced energetic electron precipitation: Impact on atmospheric chemistry
Substorm‐induced energetic electron precipitation: Impact on atmospheric chemistry Open
Magnetospheric substorms drive energetic electron precipitation into the Earth's atmosphere. We use the output from a substorm model to describe electron precipitation forcing of the atmosphere during an active substorm period in April–May…