Prozessstudien der stratosphärischen Chemie und Dynamik mit Hilfe des Chemie-Klima-Modells ECHAM5/MESSy1

Im Chemie-Klima-Modell ECHAM5/MESSy1 wurde eine neue Parameterisierung der Polaren Stratosphärischen Wolken (PSC) implementiert und deren Auswirkung auf die polare Ozonchemie untersucht. Der neue PSC-Algorithmus berücksichtigt dabei unter anderem das Wachstum und die Sedimentation von NAT-Partikeln im polaren Wirbel

Gemeinsam zum Innovationserfolg? Verbreitung und Effekte von Innovationskooperationen bei nicht forschungsintensiven Betrieben im Verarbeitenden Gewerbe

Für die Bewältigung der aktuellen Wirtschaftskrise wird Innovationen eine wichtige Bedeutung beigemessen. Nach dem Motto Stillstand ist Rückstand ermöglichen Innovationen bei Unternehmen, gestärkt aus der Krise hervorzugehen und durch marktreife Neuentwicklungen frühzeitig von einem Wiederaufschwung zu profitieren. Produkt-, Service-, organisatorische oder technische Prozessinnovationen sind wichtige Stellhebel für den langfristigen Unternehmenserfolg. Gerade die Entwicklung neuer Produkte kann durch erhöhte Investitionen in betriebliche Forschung und Entwicklung (FuE) gefördert werden. Viele Unternehmen in Deutschland weisen jedoch keine oder nur geringe FuE-Aktivitäten auf und können daher von dieser innovationstrategischen Option in der Krise aufgrund mangelnder Ressourcen nicht in gleichem Maße Gebrauch machen wie stärker forschungsintensive Unternehmen. Die Teilnahme an FuE- bzw. Innovationskooperationen stellt daher insbesondere für nicht forschungsintensive Unternehmen eine Möglichkeit dar, eigene fehlende FuE-Kompetenzen zu kompensieren und Innovationsprojekte zu realisieren, die aus eigener Kraft vielleicht nicht gestemmt werden könnten. Die Ergebnisse zeigen, dass nicht forschungsintensive Betriebe, die in FuE-Kooperationen neue Technologieimpulse aufnehmen, deutlich häufiger Produktinnovationen hervorbringen und in vermarktbare Produkte umsetzen. --

Comparison of XCO abundances from the Total Carbon Column Observing Network and the Network for the Detection of Atmospheric Composition Change measured in Karlsruhe

We present a comparison of Karlsruhe XCO records (April 2010–December 2014) from the Total Carbon Column Observing Network (TCCON) and from the spectral region covered by the Network for the Detection of Atmospheric Composition Change (NDACC). The Karlsruhe TCCON Fourier transform infrared (FTIR) spectrometer allows us to record spectra in the mid-infrared (MIR) and near-infrared (NIR) spectral region simultaneously, which makes Karlsruhe a favourable FTIR site to directly compare measurements from both spectral regions. We compare XCO retrieved from the fundamental absorption band at 4.7 µm (as used by NDACC) and first overtone absorption band at 2.3 µm (TCCON-style measurements). We observe a bias of (4.47 ± 0.17) ppb between both data sets with a standard deviation of 2.39 ppb in seasonal variation. This corresponds to a relative bias of (4.76 ± 0.18) % and a standard deviation of 2.28 %. We identify different sources which contribute to the observed bias (air-mass-independent correction factor, air-mass-dependent correction factor, isotopic identities, differing a priori volume mixing ratio profiles) and quantify their contributions. We show that the seasonality in the residual of NDACC and TCCON XCO can be largely explained by the smoothing effect caused by differing averaging kernel sensitivities between the MIR and NIR spectral region. This study aims to improve the comparability of NDACC and TCCON XCO validation data sets as desired for potential future satellite missions and model studies

Future Potentials and Strategies of non-research-intensive Industries in Germany – Impacts on Competitiveness and Employment. Summary

Non-research-intensive industries and businesses have played a comparatively minor role in the economic and innovation policy debate so far. Due to the strong focus of the political discussion on research-intensive sectors, the potential of non-research-intensive industries and businesses for Germany as a business location was usually not attributed any particular significance in the past. Based on growth theory considerations, intensive research and development (R&D) was usually associated with higher economic growth and greater international competitiveness. This report focuses on non-research-intensive sectors and companies and addresses the question of what direct and, above all, indirect contributions these sectors make to Germany\u27s international competitiveness and what future potential results from this. It examines the competitive and innovation strategies pursued by research-intensive companies and the extent to which current economic developments create pressure for change that could affect the market position and survival of research-intensive companies in the future. Furthermore, the question is addressed as to which developments are foreseeable with regard to competitiveness and thus with regard to employment opportunities in non-research-intensive industries. Finally, it is clarified which effects on the qualification requirements of these employees are foreseeable due to current developments. The analysis of the macroeconomic importance of non-research-intensive industries is based on official statistical data at the national and international level. The analyses at the company level are based on a telephone survey of more than 200 non-research-intensive companies and 88 particularly research-intensive companies in the German manufacturing sector. Supplementary evaluations are carried out using data from the survey "Modernisation of Production 2009" by the Fraunhofer ISI. The data includes information on topics such as the market environment, the competitive strategy, the specific innovation patterns, the competence equipment, the ability to absorb and implement external information, the protection and importance of different forms of knowledge or the future opportunities and risks of these enterprises

Highly Enantioselective Catalytic Asymmetric Synthesis of a (R)-Sibutramin Precursor

The first highly enantioselective, catalytic asymmetric synthesis of di-des-methylsibutramine 3 is described. Dienamide 10, prepared by acetic acid anhydride quenching of the condensation product of nitrile 4 with a methallyl magnesium chloride, proved to be an excellent substrate for ruthenium-catalyzed asymmetric hydrogenation with atropisomeric diphosphine ligands. Hydrogenation with a ruthenium/(R)- MeOBiPheP catalyst at S/C = 500, gave the chiral amide (R)-9 in 98.5% ee in almost quantitative yield. After acidic amide hydrolysis the desired amine (R)-3 was obtained without erosion of enantioselectivity. It is anticipated that the overall process will be amenable to large-scale production

Measurements and Modelling of Total Ozone Columns near St. Petersburg, Russia

The observed ozone layer depletion is influenced by continuous anthropogenic activity. This fact enforced the regular ozone monitoring globally. Information on spatial-temporal variations in total ozone columns (TOCs) derived by various observational methods and models can differ significantly due to measurement and modelling errors, differences in ozone retrieval algorithms, etc. Therefore, TOC data derived by different means should be validated regularly. In the current study, we compare TOC variations observed by ground-based (Bruker IFS 125 HR, Dobson, and M-124) and satellite (OMI, TROPOMI, and IKFS-2) instruments and simulated by models (ERA5 and EAC4 re-analysis, EMAC and INM RAS—RSHU models) near St. Petersburg (Russia) between 2009 and 2020. We demonstrate that TOC variations near St. Petersburg measured by different methods are in good agreement (with correlation coefficients of 0.95–0.99). Mean differences (MDs) and standard deviations of differences (SDDs) with respect to Dobson measurements constitute 0.0–3.9% and 2.3–3.7%, respectively, which is close to the actual requirements of the quality of TOC measurements. The largest bias is observed for Bruker 125 HR (3.9%) and IKFS-2 (−2.4%) measurements, whereas M-124 filter ozonometer shows no bias. The largest SDDs are observed for satellite measurements (3.3–3.7%), the smallest—for ground-based data (2.3–2.8%). The differences between simulated and Dobson data vary significantly. ERA5 and EAC4 re-analysis data show slight negative bias (0.1–0.2%) with SDDs of 3.7–3.9%. EMAC model overestimates Dobson TOCs by 4.5% with 4.5% SDDs, whereas INM RAS-RSHU model underestimates Dobson by 1.4% with 8.6% SDDs. All datasets demonstrate the pronounced TOC seasonal cycle with the maximum in spring and minimum in autumn. Finally, for 2004–2021 period, we derived a significant positive TOC trend near St. Petersburg (~0.4 ± 0.1 DU per year) from all datasets considered

The Michelson Interferometer for Passive Atmospheric Sounding global climatology of BrONO2 2002–2012: a test for stratospheric bromine chemistry

We present the first observational dataset of vertically resolved global stratospheric BrONO2 distributions from July 2002 until April 2012 and compare them to results of the atmospheric chemical climate model ECHAM/MESSy Atmospheric Chemistry (EMAC). The retrieved distributions are based on space-borne measurements of infrared limb-emission spectra recorded by the Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) on Envisat. The derived vertical profiles of BrONO2 volume mixing ratios represent 10∘ latitude bins and 3 d means, separated into sunlit observations and observations in the dark. The estimated uncertainties are around 1–4 pptv, caused by spectral noise for single profiles as well as for further parameter and systematic errors which may not improve by averaging. Vertical resolutions range from 3 to 8 km between 15 and 35 km altitude. All leading modes of spatial and temporal variability of stratospheric BrONO2 in the observations are well replicated by the model simulations: the large diurnal variability, the low values during polar winter as well as the maximum values at mid and high latitudes during summer. Three major differences between observations and model results are observed: (1) a model underestimation of enhanced BrONO2 in the polar winter stratosphere above about 30 km of up to 15 pptv, (2) up to 8 pptv higher modelled values than observed globally in the lower stratosphere up to 25 km, most obvious during night, and (3) up to 5 pptv lower modelled concentrations at tropical latitudes between 27 and 32 km during sunlit conditions. (1) is explained by the model missing enhanced NOx produced in the mesosphere and lower thermosphere subsiding at high latitudes in winter. This is the first time that observational evidence for enhancement of BrONO2 caused by mesospheric NOx production is reported. The other major inconsistencies (2, 3) between EMAC model results and observations are studied by sensitivity runs with a 1D model. These tentatively hint at a model underestimation of heterogeneous loss of BrONO2 in the lower stratosphere, a simulated production of BrONO2 that is too low during the day as well as strongly underestimated BrONO2 volume mixing ratios when loss via reaction with O(3P) is considered in addition to photolysis. However, considering the uncertainty ranges of model parameters and of measurements, an unambiguous identification of the causes of the differences remains difficult. The observations have also been used to derive the total stratospheric bromine content relative to years of stratospheric entry between 1997 and 2007. With an average value of 21.2±1.4 pptv of Bry at mid latitudes where the modelled adjustment from BrONO2 to Bry is smallest, the MIPAS data agree with estimates of Bry derived from observations of BrO as well as from MIPAS-Balloon measurements of BrONO2.</p