Papers by Wolfgang Steinbrecht
Handbook of Air Quality and Climate Change, 2022
provided lidar measurements of ozone and temperature at several locations. Data quality is insure... more provided lidar measurements of ozone and temperature at several locations. Data quality is insured through regular inter-comparisons. A synthesis is required. Please check the proofs of your paper carefully. Your proofs will not be read in detail by staff after you have returned them to us. It is your responsibility to ensure that the proofs have been read carefully. Translation errors between word-processor files and typesetting systems can occur so the whole proof needs to be read even if an electronic file has been supplied. Please pay particular attention to: tabulated material (this may have been rekeyed); equations; numerical data; figures and graphics; and references. If you have not already done so and wish to indicate the corresponding author(s) please mark their name(s) with an asterisk. Please fax or e-mail your corrections to us where possible. This proof reflects the content and general style of the paper without the stylistic complexity of the final printed page; howev...
Atmospheric Measurement Techniques, 2021
For the first time in serveral years, the El Nino-Southern Oscillation did not dominate regional ... more For the first time in serveral years, the El Nino-Southern Oscillation did not dominate regional climate conditions around the globe. A weak La Ni a dissipated to ENSOneutral conditions by spring, and while El Nino appeared to be emerging during summer, this phase never fully developed as sea surface temperatures in the eastern conditions. Nevertheless, other large-scale climate patterns and extreme weather events impacted various regions during the year. A negative phase of the Arctic Oscillation from mid-January to early February contributed to frigid conditions in parts of northern Africa, eastern Europe, and western Asia. A lack of rain during the 2012 wet season led to the worst drought in at least the past three decades for northeastern Brazil. Central North America also experienced one of its most severe droughts on record. The Caribbean observed a very wet dry season and it was the Sahel's wettest rainy season in 50 years. Overall, the 2012 average temperature across glo...
El artículo aborda el problema de la investigación sobre lo imaginario cuando se parte de la base... more El artículo aborda el problema de la investigación sobre lo imaginario cuando se parte de la base de una investigación sobre el universo material. Se traza un panorama de la evolución del concepto de materia en la filosofía y ciencia de occidente, hasta llegar a las concepciones modernas basadas en los descubrimientos
Atmospheric Chemistry and Physics, 2021
Spaceand ground-based measurements near five stations of the Network for the Detection of Atmosph... more Spaceand ground-based measurements near five stations of the Network for the Detection of Atmospheric Composition Change (NDACC) demonstrate the evolution of upper stratospheric ozone and temperature over the last 30 years. At all stations, ozone has been decreasing by about 15% from 1979 to the late 1990s. Since then, however, ozone levels have been stable or slightly increasing. This evolution is consistent with the strong increase of anthropogenic chlorine from 1979 until the late 1990s, and the beginning chlorine decline achieved by the 1987 Montreal protocol. Agreement between different instruments, as well as with CCMVal model simulations is good. The situation is less clear for upper stratospheric temperature. Measurements at the stations show good agreement with NCEP and ERA-40 analyses, but higher variability than zonal means. Only the wide zonal mean SSU data, which also average over a very wide altitude range, show a clear cooling by about 1 K per decade until around 1995...
Journal of Geophysical Research: Atmospheres, 2020
Geophysical Research Letters, 2021
Atmospheric Measurement Techniques, 2020
Journal of Geophysical Research: Atmospheres, 2020
Atmosphere, 2020
In this paper, we compare model calculations of ozone profiles and their variability for the peri... more In this paper, we compare model calculations of ozone profiles and their variability for the period 1998 to 2016 with satellite and lidar profiles at five ground-based stations. Under the investigation is the temporal impact of the stratospheric halogen reduction (chemical processes) and increase in greenhouse gases (i.e., global warming) on stratospheric ozone changes. Attention is given to the effect of greenhouse gases on ultraviolet-B radiation at ground level. Our chemistry transport and chemistry climate models (Oslo CTM3 and EMAC CCM) indicate that (a) the effect of halogen reduction is maximized in ozone recovery at 1–7 hPa and observed at all lidar stations; and (b) significant impact of greenhouse gases on stratospheric ozone recovery is predicted after the year 2050. Our study indicates that solar ultraviolet-B irradiance that produces DNA damage would increase after the year 2050 by +1.3% per decade. Such change in the model is driven by a significant decrease in cloud c...
Atmospheric Chemistry and Physics, 2018
Comptes Rendus Geoscience, 2018
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Papers by Wolfgang Steinbrecht