Studies of aerosols advected to coastal areas with the use of remote techniques     

Tymon Zieliński  Tomasz Petelski  Przemysław Makuch  Agata Strzałkowska  Agnieszka Ponczkowska  Krzysztof M. Markowicz  Georgius Chourdakis  George Georgoussis  Susanne Kratzer 《Acta Geophysica》2012,60(5):1359-1385

This paper presents the results of the studies of aerosol optical properties measured using lidars and sun photometers. We describe two case studies of the combined measurements made in two coastal zones in Crete in 2006 and in Rozewie on the Baltic Sea in 2009. The combination of lidar and sun photometer measurements provides comprehensive information on both the total aerosol optical thickness in the entire atmosphere as well as the vertical structure of aerosol optical properties. Combination of such information with air mass back-trajectories and data collected at stations located on the route of air masses provides complete picture of the aerosol variations in the study area both vertically and horizontally. We show that such combined studies are especially important in the coastal areas where depending on air mass advection directions and altitudes the influence of fine or coarse mode (in this case possibly sea-salt) particles on the vertical structure of aerosol optical properties is an important issue to consider.  相似文献   

Wavelet Characteristics of Hydrological and Dissolved Oxygen Time Series in a Lowland River     

Agnieszka Rajwa-Kuligiewicz  Robert J. Bialik  Paweł M. Rowiński 《Acta Geophysica》2016,64(3):649-669

In this study, we investigated the temporal variability of dissolved oxygen and water temperature in conjunction with water level fluctuations and river discharge in the Narew lowland river reach. For this purpose, high resolution hydrologic and water quality time series have been used. Spectral analyses of time series using continuous wavelet transform scheme have been applied in order to identify characteristic scales, its duration, and localisation in time. The results of wavelet analysis have shown a great number of periodicities in time series at the inter-annual time scale when compared to the classical Fourier analysis. Additionally, wavelet coherence revealed the complex nature of the relationship between dissolved oxygen and hydrological variables dependent on the scale and localisation in time. Hence, the results presented in this paper may provide an alternative representation to a frequency analysis of time series.  相似文献   

Report on anisakid nematodes in polar regions – Preliminary results     

Joanna Dzido  Agnieszka Kijewska  Magdalena Rokicka  Agnieszka Świątalska-Koseda  Jerzy Rokicki 《Polar Science》2009,3(3):207-211

The aim of this study is to extend our knowledge of the distribution of anisakid nematode parasites in Arctic and Antarctic polar regions. We examined vertebrate (fish) taxa characteristic of the faunas in both polar regions for the presence of parasitic nematodes. The material was collected from Svalbard (Arctic) between July and August 2008 and from King George Island (South Shetland Islands, Antarctic Peninsula) between November 2007 and January 2008. In addition, faecal, bird, and invertebrate samples were collected and examined for the presence of anisakid nematodes or eggs. Anisakis simplex s.s. was found in the body cavity of Arctic cod, and Contracaecum sp. and Pseudoterranova sp. were found in Antarctic notothenioids. Eggs of Anisakis sp. and Contracaecum sp. were recovered from the faeces of Mirounga leonina. We present the first record of the occurrence of A. simplex C in the Antarctic fishes Notothenia coriiceps and Notothenia rossii.  相似文献   

Usefulness of the Modified NRCS-CN Method for the Assessment of Direct Runoff in a Mountain Catchment     

Andrzej Wałęga  Agnieszka Rutkowska 《Acta Geophysica》2015,63(5):1423-1446

The aim of this study was to evaluate the usefulness of modified methods, developed on the basis of NRCS-CN method, in determining the size of an effective rainfall (direct runoff). The analyses were performed for the mountain catchment of the Kamienica river, right-hand tributary of the Dunajec. The amount of direct runoff was calculated using the following methods: (1) Original NRCS-CN model, (2) Mishra—Singh model (MS model), (3) Sahu Mishra Eldho model (SME model), (4) Sahu 1-p model, (5) Sahu 3-p model, and (6) Q_base model. The study results indicated that the amount of direct runoff, determined on the basis of the original NRCS-CN method, may differ significantly from the actually observed values. The best results were achieved when the direct runoff was determined using the SME and Sahu 3-p model.  相似文献   

Assessment of the Kraków inhabitants’ health risk caused by the exposure to inhalation of outdoor air contaminants     

Agnieszka?Gruszecka-KosowskaEmail author 《Stochastic Environmental Research and Risk Assessment (SERRA)》2018,32(2):485-499

Health risk associated with the exposure to the polluted atmospheric air inhalation was estimated for the residents of Kraków, Poland. The air pollution concentration data were obtained from the air-quality monitoring system of the city in 2007–2016. The carcinogenic risk of the studied subpopulations was not acceptable under the formula of C₆H₆ > BaP > As(PM10) > Cd(PM10) > Pb(PM10) > Ni(PM10). The total carcinogenic risk (Rt) amounted to 3.04E?04 for children, 2.22E?04 for infants, 1.45E?04 for women, and 1.22E?04 for men. The same risk was calculated for the top three locations of the monitoring stations in this respect, within the city of Kraków: Kurdwanów Housing Estate, Nowa Huta district, and Krasińskiego Av. Non-carcinogenic risk in the case of all six monitoring stations and in respect of all the studied subpopulations, resulting from the exposure to PM10 and for NO₂ for all stations in case of children and infants, as well as, for adults at Krasińskiego Av. and Dietla Str. stations was rated medium. For C₆H₆ in the case of adults, children, and infants the risk was rated low. The total risk (HI) of non-carcinogenic pollution was rated medium and ranged as follows: 6.53 for children, 4.70 for infants, 3.19 for women, and 2.67 for men. That type of risk was decreasing at the station locations as follows: Krasińskiego Av. > Dietla Str. > Nowa Huta district > Kurdwanów Housing Estate > Z?oty Róg Str. > Piastów Housing Estate.  相似文献   

Temporal and spatial variability of extreme river flow quantiles in the Upper Vistula River basin,Poland          下载免费PDF全文

Agnieszka Rutkowska  Patrick Willems  Charles Onyutha  Wojciech Młocek 《水文研究》2017,31(7):1510-1526

Temporal and spatial variability in extreme quantile anomalies of seasonal and annual maximum river flows was studied for 41 gauging stations at rivers in the Upper Vistula River basin, Poland. Using the quantile perturbation method, the temporal variability in anomalies was analysed. Interdecadal oscillating components were extracted from the series of anomalies using the Hilbert‐Huang transform method. Period length, part of variance of each component, and part of unexplained variance were assessed. Results show an oscillating pattern in the temporal occurrence of extreme flow quantiles with clusters of high values in the 1960–1970s and since the late 1990s and of low values in the 1980s and at the beginning of the 1990s. The anomalies show a high variability on the right bank of the Upper Vistula River basin during the summer season with the highest values in catchments located in the western and south‐western parts of the basin. River flow extreme quantiles were found to be associated with large‐scale climatic variables from the regions of the North Atlantic Ocean, Scandinavia, Eastern Europe, Asia, and, to a lesser extent, the Pacific Ocean. Similarities between temporal variability of river flows and climatic factors were revealed. Results of the study are important for flood frequency analysis because a long observation period is necessary to capture clusters of high and low river flows.  相似文献   

Statistics of Turbulence in the Stable Boundary Layer Affected by Gravity Waves   总被引：1，自引：1，他引：0  

Zbigniew Sorbjan  Agnieszka Czerwinska 《Boundary-Layer Meteorology》2013,148(1):73-91

In order to investigate effects of interactions between turbulence and gravity waves in the stable boundary layer on similarity theory relationships, we re-examined a dataset, collected during three April nights in 1978 and in 1980 on the 300-m tower of the Boulder Atmospheric Observatory (BAO). The BAO site, located in Erie, Colorado, USA, 30 km east of the foothills of the Rocky Mountains, has been known for the frequent detection of wave activities. The considered profiles of turbulent fluxes and variances were normalized by two local, gradient-based scaling systems, and subsequently compared with similarity functions of the Richardson number, obtained based on data with no influence of gravity currents and topographical factors. The first scaling system was based on local values of the vertical velocity variance $\sigma _\mathrm{w}$ and the Brunt–Väisäla frequency $ N,$ while the second one was based on the temperature variance $\sigma _{\theta }$ and $N.$ Analysis showed some departures from the similarity functions (obtained for data with virtually no influence of mesoscale motions); nonetheless the overall dependency of dimensionless moments on the Richardson number was maintained.  相似文献   

Environmental and climatic reconstructions during Marine Oxygen Isotope Stage 3 from Gossau, Swiss Midlands, based on coleopteran assemblages     

MONIKA JOST-STAUFFER  GEOFFREY RUSSELL COOPE  CHRISTIAN SCHLÜCHTER 《Boreas: An International Journal of Quaternary Research》2005,34(1):53-60

The well-known lower lignite layer at Gossau (15 km SE of Zürich, Switzerland) has been radiocarbon-dated to between 30 000 and 54 000 yr BP. Though these dates may be considered to be beyond the acceptable limit of the technique, there can be little doubt on stratigraphical grounds that the deposits date from some early part of MOI Stage 3. The lower lignite has yielded 49 taxa of beetles from which a detailed palaeoenvironmental picture can be reconstructed. Quantified palaeotemperature estimates using the Mutual Climatic Range method, based on this fossil assemblage, indicate that the climate was cold and considerably more continental than it is today in the Swiss Midlands and close to the thermal limit for the growth of trees. The fauna bears similarities to others from the same general period in northern Europe.  相似文献   

A traveler's guide to Mars by William K. Hartmann     

Agnieszka P. Baier 《Meteoritics & planetary science》2003,38(9):1419-1420

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Shapes and rotational properties of thirty asteroids from photometric data     

Johanna Torppa  Tadeusz Micha?owski  Agnieszka Kryszczyńska  Richard Kowalski 《Icarus》2003,164(2):346-383

We have analyzed photometric lightcurves of 30 asteroids, and present here the obtained shapes, rotational periods and pole directions. We also present new photometric observations of five asteroids. The shape models indicate the existence of many features of varying degrees of irregularity. Even large main-belt asteroids display such features, so the resulting poles and periods are more consistent than those obtained by simple ellipsoid-like models. In some cases the new rotational parameters are rather different from those obtained previously, and in a few cases there were no proper previous estimates at all.  相似文献