Bücher- und Zeitschriftenschau     

Karl L. Henning  St. 《International Journal of Earth Sciences》1914,5(7):500-509

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Die paläogeographische Auswertung der Schrägschichtung     

Henning Illies 《International Journal of Earth Sciences》1951,39(1):234-237

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Joint AVO inversion, wavelet estimation and noise-level estimation using a spatially coupled hierarchical Bayesian model   总被引：1，自引：0，他引：1  

Arild Buland  Henning Omre 《Geophysical Prospecting》2003,51(6):531-550

The main objective of the AVO inversion is to obtain posterior distributions for P-wave velocity, S-wave velocity and density from specified prior distributions, seismic data and well-log data. The inversion problem also involves estimation of a seismic wavelet and the seismic-noise level. The noise model is represented by a zero mean Gaussian distribution specified by a covariance matrix. A method for joint AVO inversion, wavelet estimation and estimation of the noise level is developed in a Bayesian framework. The stochastic model includes uncertainty of both the elastic parameters, the wavelet, and the seismic and well-log data. The posterior distribution is explored by Markov-chain Monte-Carlo simulation using the Gibbs' sampler algorithm. The inversion algorithm has been tested on a seismic line from the Heidrun Field with two wells located on the line. The use of a coloured seismic-noise model resulted in about 10% lower uncertainties for the P-wave velocity, S-wave velocity and density compared with a white-noise model. The uncertainty of the estimated wavelet is low. In the Heidrun example, the effect of including uncertainty of the wavelet and the noise level was marginal with respect to the AVO inversion results.  相似文献   

Übersicht der Veröffentlichungen der U. S. Geological Survey     

Charles L. Henning 《International Journal of Earth Sciences》1912,3(1):56-70

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The second Aerosol Characterization Experiment (ACE‐2)     

Henning Rodhe 《Tellus. Series B, Chemical and physical meteorology》2000,52(2):109-109

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The use of benthic indicators in Europe: from the Water Framework Directive to the Marine Strategy Framework Directive   总被引：1，自引：0，他引：1  

Van Hoey G  Borja A  Birchenough S  Buhl-Mortensen L  Degraer S  Fleischer D  Kerckhof F  Magni P  Muxika I  Reiss H  Schröder A  Zettler ML 《Marine pollution bulletin》2010,60(12):2187-2196

The Water Framework Directive (WFD) and the Marine Strategy Framework Directive (MSFD) are the European umbrella regulations for water systems. It is a challenge for the scientific community to translate the principles of these directives into realistic and accurate approaches. The aim of this paper, conducted by the Benthos Ecology Working Group of ICES, is to describe how the principles have been translated, which were the challenges and best way forward. We have tackled the following principles: the ecosystem-based approach, the development of benthic indicators, the definition of ‘pristine’ or sustainable conditions, the detection of pressures and the development of monitoring programs. We concluded that testing and integrating the different approaches was facilitated during the WFD process, which led to further insights and improvements, which the MSFD can rely upon. Expert involvement in the entire implementation process proved to be of vital importance.  相似文献   

A "critical" climatic evaluation of last interglacial (MIS 5e) records from the Norwegian Sea     

Henning A. Bauch  & Helmut Erlenkeuser 《Polar research》2008,27(2):135-151

Sediment cores from the Norwegian Sea were studied to evaluate interglacial climate conditions of the marine isotope stage 5e (MIS 5e). Using planktic forminiferal assemblages as the core method, a detailed picture of the evolution of surface water conditions was derived. According to our age model, a step-like deglaciation of the Saalian ice sheets is noted between ca. 135 and 124.5 Kya, but the deglaciation shows little response with regard to surface ocean warming. From then on, the rapidly increasing abundance of subpolar forminifers, concomitant with decreasing iceberg indicators, provides evidence for the development of interglacial conditions sensu stricto (5e- ss ), a period that lasted for about 9 Ky. As interpreted from the foraminiferal records, and supported by the other proxies, this interval of 5e- ss was in two parts: showing an early warm phase, but with a fresher, i.e., lower salinity, water mass, and a subsequent cooling phase that lasted until ca. 118.5 Kya. After this time, the climatic optimum with the most intense advection of Atlantic surface water masses occurred until ca. 116 Kya. A rapid transition with two notable climatic perturbations is observed subsequently during the glacial inception. Overall, the peak warmth of the last interglacial period occurred relatively late after deglaciation, and at no time did it reach the high warmth level of the early Holocene. This finding must be considered when using the last interglacial situation as an analogue model for enhanced meridional transfer of ocean heat to the Arctic, with the prospect of a future warmer climate.  相似文献   

Regional temperature response due to indirect sulfate aerosol forcing: impact of model resolution     

A.?M.?L.?EkmanEmail author  Henning?Rodhe 《Climate Dynamics》2003,21(1):1-10

A regional atmospheric climate model, including an interactive module of the tropospheric sulfur cycle, has been used to conduct yearlong equilibrium simulations of the temperature response due to anthropogenic sulfate aerosol forcing on cloud albedo. A main purpose is to examine differences in the magnitudes as well as patterns of forcing and response between simulations conducted with high (0.4° × 0.4°, HR) and low (2.0° × 2.0°, LR) spatial resolutions. Averaged over the model domain, the annual mean indirect forcing differs by only 7% between HR and LR and there is no difference in the annual mean temperature response. The results thus indicate that it is not important to represent small-scale variability (=2.8°) when the average indirect climate effect over Europe is considered. However, a notable difference in the geographical distributions of forcing and response is obtained when different resolutions are employed. In addition, a clear correspondence between the patterns of radiative forcing and temperature response is obtained when HR is used. The correspondence is less obvious in the LR simulation. It is interesting to compare the present results with those of Roeckner et al. 1999, who found a poor correspondence between the patterns of forcing and response in their simulations using a coarse resolution GCM.  相似文献   

Seasonal variability of benthic indices: an approach to test the applicability of different indices for ecosystem quality assessment     

Reiss H  Kröncke I 《Marine pollution bulletin》2005,50(12):1490-1499

In recent studies, several benthic biological indices were developed or used to assess the ecological quality status of marine environments. In the present study the seasonal variability of several univariate and multimetric indices was studied on a monthly scale (September 2000 until May 2002) in different areas of the North Sea such as the German Bight, the Oyster Ground and the Dogger Bank. The stations were chosen to reflect a gradient in the hydrographic regime, temperature and organic matter supply. The seasonal variability was highest for the univariate indices such as the Shannon–Wiener Index and the Hurlbert Index. Thus, due to sensitivity to recruitment the corresponding ecological status ranged from ‘good’ to ‘poor’ depending on the season. For the multimetric indices such as the AMBI or the BQI the seasonal variability and the corresponding ecological status were low. The results are discussed concerning possible consequences for ecological quality assessment especially related to the Water Framework Directive (WFD).  相似文献   

Far-Infrared Photometry of Circumstellar Matter Around Intermediate Mass Stars     

P. Ábrahám  Ch. Leinert  D. Lemke  A. Burkert  Th. Henning 《Astrophysics and Space Science》1997,255(1-2):45-51

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