Influence of Solar Radiation on the Diurnal and Seasonal Variability of O3 and H2O in the Stratosphere and Lower Mesosphere, Based on Continuous Observations in the Tropics and the High Arctic

Palm, Mathias; Golchert, S. H. W.; Sinnhuber, Miriam; Hochschild, G.; Notholt, Justus

doi:10.1007/978-94-007-4348-9_8

Cited by 5 publications

(16 citation statements)

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“…(Haefele et al, 2008) found an afternoon enhancement in the observations of the ground-based microwave radiometer SOMORA at the Alpine station in Payerne, Switzerland. This enhancement is also seen in the summertime observations of OZORAM at the Arctic station at Ny-Ålesund, Svalbard (Palm et al, 2013). A monthly climatology of the diurnal ozone cycle was derived from 17 years of observations of GROMOS which is operated at Bern, Switzerland (Studer et al, 2014).…”

Section: Introductionmentioning

confidence: 73%

“…The diurnal cycle of ozone in the mesosphere has been thoroughly studied by means of ground-based microwave instruments (Penfield et al, 1976;Wilson and Schwartz, 1981;Lobsiger and Künzi, 1986;Zommerfelds et al, 1989;Connor et al, 1994;Palm et al, 2013) and other techniques (Vaughan, 1982;Ricaud et al, 1996). A sharp decrease in ozone volume mixing ratio (VMR) after sunrise of up to 65 % at 0.1 hPa was reported.…”

Section: Introductionmentioning

confidence: 99%

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Diurnal variation in middle-atmospheric ozone observed by ground-based microwave radiometry at Ny-Ålesund over 1 year

et al. 2018

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Abstract. We present an analysis of the diurnal ozone cycle from 1 year of continuous ozone measurements from two ground-based microwave radiometers in the Arctic. The instruments GROMOS-C and OZORAM are located at the AWIPEV research base at Ny-Ålesund, Svalbard (79 • N, 12 • E), and gathered a comprehensive time series of middleatmospheric ozone profiles with a high time resolution. An intercomparison was performed with EOS MLS and ozone sonde measurements and simulations with SD-WACCM. The measured data sets were used to study the photochemically induced diurnal cycle of ozone in the stratosphere and mesosphere. Throughout the year the insolation in the Arctic changes drastically from polar night to polar day. Accordingly, the seasonal variations in the diurnal ozone cycle are large. In the stratosphere we found a diurnal cycle throughout the entire period of polar day with the largest amplitude in April. In the mesosphere a diurnal cycle was detected in spring and fall. SD-WACCM has been proven to capture the diurnal cycle well and was therefore used to analyse the chemical reaction rates of ozone production and loss at equinox and summer solstice. Furthermore GROMOS-C proved capable of measuring the tertiary ozone layer above Ny-Ålesund in winter.

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Section: Introductionmentioning

confidence: 73%

Section: Introductionmentioning

confidence: 99%

Diurnal variation in middle-atmospheric ozone observed by ground-based microwave radiometry at Ny-Ålesund over 1 year

et al. 2018

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“…This enhancement is also seen in the summertime observations from OZORAM at the Arctic station at Ny-Ålesund, Svalbard (Palm et al, 2013). A monthly climatology of the diurnal ozone cycle was derived from 17 years of observations of GROMOS which is operated at Bern, Switzerland (Studer et al, 2014).…”

mentioning

confidence: 71%

“…The diurnal cycle of ozone in the mesosphere has been vastly studied by means of ground based microwave instruments (Penfield et al, 1976;Wilson and Schwartz, 1981;Lobsiger and Künzi, 1986;Zommerfelds et al, 1989;Connor et al, 1994;Palm et al, 2013) and other techniques (Vaughan, 1982;Ricaud et al, 1996). A sharp decrease in ozone volume mixing ratio (VMR) after sunrise of up to 65% at 0.1 hPa was reported.…”

mentioning

confidence: 99%

“…Palm et al (2013) published a time series of stratospheric ozone measured by OZORAM which covers three intervals of several days during summer 2010 and reported the existence of a diurnal variation during polar day. The monthly mean diurnal cycle measured by OZORAM in June 2011 was intercompared to model reanalyses and revealed a relative amplitude of 8% at 5 hPa (Schanz et al, 2014b).…”

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confidence: 99%

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Diurnal variation in middle atmospheric ozone by ground based microwave radiometry at Ny-Ålesund over 1 year

Schranz¹,

Vidal²,

Kämpfer³

et al. 2017

Preprint

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Abstract. We present an analysis of the diurnal ozone cycle from one year of continuous ozone measurements from two ground based microwave radiometers in the Arctic. The instruments GROMOS-C and OZORAM have been located at the AWIPEV research base at Ny-Ålesund, Svalbard (79• E) and gathered a comprehensive time series of middle atmospheric ozone profiles with a high time resolution. An intercomparison was performed with EOS MLS and ozone sonde measurements and simulations with SD-WACCM. The measured datasets were used to study the photochemically induced diurnal cycle of ozone 5 in the stratosphere and mesosphere. Throughout the year the insolation in the Arctic changes drastically from polar night to polar day. Accordingly, the seasonal variations in the diurnal ozone cycle are large. In the stratosphere we found a diurnal cycle throughout the whole period of polar day with the largest amplitude in April. In the mesosphere a diurnal cycle was detected in spring and fall. SD-WACCM has proved to well capture the diurnal cycle and was therefore used to analyse the chemical reaction rates of ozone production and loss at equinox and summer solstice. Furthermore GROMOS-C proofed capable of 10 measuring the tertiary ozone layer above Ny-Ålesund in winter.

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The Diurnal Variation in Stratospheric Ozone from MACC Reanalysis, ERA-Interim, WACCM, and Earth Observation Data: Characteristics and Intercomparison

et al. 2021

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In this study, we compare the diurnal variation in stratospheric ozone of the MACC (Monitoring Atmospheric Composition and Climate) reanalysis, ECMWF Reanalysis Interim (ERA-Interim), and the free-running WACCM (Whole Atmosphere Community Climate Model). The diurnal variation of stratospheric ozone results from photochemical and dynamical processes depending on altitude, latitude, and season. MACC reanalysis and WACCM use similar chemistry modules and calculate a similar diurnal cycle in ozone when it is caused by a photochemical variation. The results of the two model systems are confirmed by observations of the Superconducting Submillimeter-Wave Limb-Emission Sounder (SMILES) experiment and three selected sites of the Network for Detection of Atmospheric Composition Change (NDACC) at Mauna Loa, Hawaii (tropics), Bern, Switzerland (midlatitudes), and Ny-Ålesund, Svalbard (high latitudes). On the other hand, the ozone product of ERA-Interim shows considerably less diurnal variation due to photochemical variations. The global maxima of diurnal variation occur at high latitudes in summer, e.g., near the Arctic NDACC site at Ny-Ålesund, Svalbard. The local OZORAM radiometer observes this effect in good agreement with MACC reanalysis and WACCM. The sensed diurnal variation at Ny-Ålesund is up to 8% (0.4 ppmv) due to photochemical variations in summer and negligible during the dynamically dominated winter. However, when dynamics play a major role for the diurnal ozone variation as in the lower stratosphere (100–20 hPa), the reanalysis models ERA-Interim and MACC which assimilate data from radiosondes and satellites outperform the free-running WACCM. Such a domain is the Antarctic polar winter where a surprising novel feature of diurnal variation is indicated by MACC reanalysis and ERA-Interim at the edge of the polar vortex. This effect accounts for up to 8% (0.4 ppmv) in both model systems. In summary, MACC reanalysis provides a global description of the diurnal variation of stratospheric ozone caused by dynamics and photochemical variations. This is of high interest for ozone trend analysis and other research which is based on merged satellite data or measurements at different local time.

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Influence of Solar Radiation on the Diurnal and Seasonal Variability of O3 and H2O in the Stratosphere and Lower Mesosphere, Based on Continuous Observations in the Tropics and the High Arctic

Cited by 5 publications

References 35 publications

Diurnal variation in middle-atmospheric ozone observed by ground-based microwave radiometry at Ny-Ålesund over 1 year

Diurnal variation in middle-atmospheric ozone observed by ground-based microwave radiometry at Ny-Ålesund over 1 year

Diurnal variation in middle atmospheric ozone by ground based microwave radiometry at Ny-Ålesund over 1 year

The Diurnal Variation in Stratospheric Ozone from MACC Reanalysis, ERA-Interim, WACCM, and Earth Observation Data: Characteristics and Intercomparison

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