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1
Content available remote Impact of climate warming on the surface water temperature of plateau lake
EN
Lake surface water temperature (LSWT) is a vital indicator in evaluating the ecological environment and has a direct or indirect impact on regulating physical, chemical, and ecological processes of lakes. Changes in LSWT have a huge impact on the water quality, ecosystem function, and biome composition of the entire lake. In this study, we selected Dianchi Lake as the research area, the monthly average LSWT data collected at the monitoring station from 1998 to 2009 were used as the calibration dataset. The error analysis dataset is the average annual temperatures of the Dianchi Lake extracted from MODIS remote sensing images from 2001 to 2017. The daily average LSWT of Dianchi Lake was estimated by the air–water model and the historical changes from 1980 to 2017 of the LSWT were reproduced. The research draws a conclusion that the LSWT of Dianchi Lake has been greatly afected by air temperature over the past 37 years. LSWT and the annual average air temperature correlation coefcient were R>0.9. Both the air temperature and LSWT assumed an increasing tendency. The annual average LSWT increased with the rate of 0.36 °C/decade, and the annual average warming rate of the air temperature was 0.47 °C/decade. The monthly average LSWT and air temperature showed a signifcant correlation at a confdence interval of α=0.001. The LSWT of Dianchi Lake increased signifcantly in February, March, and December. The periodicity of the seasonal mean air temperature change was consistent with that of the LSWT in Dianchi Lake. The relative lag of the thermal response of the LSWT to climate warming was also observed. This study flls in the gaps in the long-term sequence data on the LSWT of Dianchi Lake and reveals the efect of climate warming on the LSWT of low-latitude plateau lakes.
2
Content available remote Charakterystyka środowiskowa systemów ETICS w latach 2014-2019
PL
W artykule przedstawiono oszacowanie oddziaływań środowiskowych obliczonych z wykorzystaniem metody oceny cyklu życia (LCA) dla złożonego systemu izolacji cieplnej ETICS. Analizie poddano wyniki uzyskane na podstawie danych dotyczących produkcji w 2012 r. i w 2017 r. w pięciu lokalizacjach produkcyjnych na terenie Polski. Cykl życia, będący przedmiotem analizy, obejmował moduły od A1 do A3, tj. od wydobycia surowców aż do gotowego wyrobu dostarczonego do bramy fabryki. Porównanie wartości wskaźników charakterystyki środowiskowej badanych systemów ETICS wskazuje, że w rozpatrywanych pięciu latach nastąpiło zmniejszenie ich negatywnego wpływu na środowisko naturalne.
EN
The paper presents the impact of the External Thermal Insulation Composite System (ETICS) on the natural environment. Analysis of environmental impact factors was conducted based on the life cycle assessment (LCA) methodology. Experimental results were obtained from the verified inventory data from the production at five different locations, following the year 2012 and 2017, respectively.The life cycle analysis of the examined products covered modules from A1 to A3, i.e. from raw materials extraction, up to the finished, packed product at the factory gate. Results of the LCA showed that within the last five years, the negative impact of the ETICS system on the natural environment decreased significantly.
3
Content available remote Changes in Air Temperature in Poland at Around Noon in the Years 1951-2018
EN
The paper characterises the variability of thermal conditions in Poland at around noon in the years 1951–2018. Based on the data from Kołobrzeg, Poznań and Kraków, the average monthly, seasonal and annual values of air temperature were calculated along with standard deviation, maximum and minimum temperature values, as well as the average values of temperature in the consecutive decades of the studied period. Moreover, values of linear trends were determined along with statistical significance at a level of 0.05, as well as values of the deviations of temperature from a long-term average, which were smoothed by means of 10-year moving averages. The research indicated a statistically significant increase in air temperature, both annual and in individual seasons. Particularly noticeable warming was noted in the winter-spring period, especially in Krakow; the smallest one occurred in autumn. The increase in temperature in the studied years was influenced mostly by the years 2011–2018. Also, higher contrast of thermal conditions compared to other seasons of the year was observed in the winter-spring season.
EN
The aim of this work was to analyse the response of dominant tree species to the changing climate in a subtropical evergreen broad-leaved forest in China. We investigated the main leaf phenology and herbivory parameters of four typical trees (i.e., Schima superba, Castanopsis fargesii, Castanopsis sclerophylla and Cyclobalanopsis sessilifolia) in spring from 2010 to 2014 in the Tiantong National Forest Research Station in eastern China. The results showed that the accumulated temperature was the principle factor which affected the leaf phenology and herbivory. All four trees got an earlier, shorter and more synchronised leaf expansion in years with higher accumulated temperature, and also they suffered more sever leaf damage in these years. However the trees responded differently to climate warming in leaf phenology and herbivory. The S. superba and Ca. sclerophylla were more sensitive to the varying accumulated temperature than the Ca. fargesii and Cy. sessilifolia both in leaf phenology and herbivory during leaf expansion. We suggest that the observed variations in leaf phenology and leaf traits to the changing accumulated temperature should be taken into consideration for pest management and community stability maintenance in forests adapting to the changing climate.
EN
Uncontrolled methane release from clathrates may intensify global warming, causes deoxygenation and changes of pH of oceanic water, prompt tsunami and other hazards. On the other hand, it can be a great source of unconventional fossil fuels in the future, when conventional sources will be depleted and renewable sources not enough developed. The problem is how to ensure its safe exploitation. Methane clathrate breakdown, environmental impacts and feedback between them are presented and possible commercial methods of methane exploitation are compared. Finally, a selected method of methane clathrate exploitation that minimalizes environmental hazards is proposed. Among possible methods such as thermal stimulation, depressurization, inhibitor injection and gas exchange, only the latter one is ecologically friendly and can diminish climate warming with simultaneous CO2 sequestration.
6
Content available remote Czy energetyka oparta na spalaniu ma wpływ na efekt cieplarniany?
PL
Od 1973 roku, czyli od pierwszego kryzysu energetycznego, mieszkańcy Ziemi zaczęli żyć w poczuciu zagrożenia utratą dostępu do energii. Mówiono i pisano dużo o kończących się zasobach paliw kopalnych, zapowiadano też, że zanim osiągniemy dno w zasobach surowców energetycznych ich ceny będą tak wysokie, że przestaną być powszechnie dostępne. Odkrywanie nowych zasobów surowców energetycznych, energooszczędne technologie, odnawialne źródła energii znacznie to poczucie zagrożenia złagodziły. Dla odmiany w 1992 roku na konferencji w Rio de Janeiro wywołano nowe widmo grożące wyniszczeniem Ziemi i ludzkości. Jest nim dwutlenek węgla jako efekt procesów spalania. W przedstawionym referacie zestawiono ważniejsze czynniki przemawiające za i przeciw zagrożeniom związanym z emisją dwutlenku węgla do atmosfery. W rozważaniach uwzględniono m.in. charakterystyki absorpcji promieniowania w atmosferze w zależności od stężenia i temperatury dwutlenku węgla, zmiany stężenia dwutlenku węgla w atmosferze w krótszych i dłuższych przedziałach czasu, wahania poziomu wód oceanicznych i związek odchyleń temperatury od jej wartości średniej a aktywnością Słońca.
EN
Since the first energy crisis 1973 people started to worry about losing the access to energy sources. The public discussion about this issue raged at that time. It was said that even before the fossil fuel sources end up the prices rise to a level unreachable for an average consumer. That fear was eased by discoveries of new energy sources, energy saving technologies and renewable energy sources. In 1992 during the conference in Rio de Janeiro emerged a threat which was predicted to bring our planet to an end. Its CO2 that comes from burning of fossil fuels. This paper presents positive and negative arguments related to CO2 emission to the atmosphere. There are considered aspects like absorption of radiation in the atmosphere in correlation to concentration and temperature of CO2, changes in concentration of CO2 in longer or shorter time periods, vacillation of ocean surface level, relation between temperature changes from its the average and the sun activity.
PL
W ostatnich latach pojawiają się coraz częściej sygnały z północnej Europy (>60 N), wskazujące na istotne zmiany zachodzące w przebiegu wieloletniej liczebności norników i lemingów. Zmiany te, polegające na zaniku regularnych cykli populacyjnych o wysokiej amplitudzie i pojawieniu się w ich miejsce niecyklicznych fluktuacji na stosunkowym niskim poziomie liczebności, przypisywane są globalnemu ociepleniu klimatu, najsilniej zaznaczającemu się w północnej i umiarkowanej strefie klimatycznej w okresie zimy. Dane zaprezentowane w tym artykule (1) przedstawiają podobne zmiany dynamikiliczebności w populacjach dwóch gatunków norników w Polsce w okresie ostatnich 25 lat; (2) wskazują, które czynniki meteorologiczne są najistotniejsze dla zimowej przeżywalności norników oraz (3) wykazują statystycznie, że te właśnie czynniki w ostatnim półwieczu zmieniały się niekorzystnie dla norników w miarę ocieplania się klimatu. Ponadto, przedstawiono zależność pomiędzy obniżającą się liczebnością norników a spadkiem zagęszczenia zwierzyny drobnej w Polsce w okresie ostatnich 20 lat, sugerującą, że niedostatek norników jest przyczyną nadmiernej redukcji zwierzyny drobnej przez drapieżniki, dla których norniki, szczególnie w latach masowego występowania, stanowiły poprzednio podstawowe źródło pokarmu.
EN
Recently, several reports from Northern Europe (>60 N) indicated significant change in population dynamics of voles and lemmings. The change from high–amplitude regular cycles to acyclic fluctuations at relatively low level is regarded as an effect of climate warming, most pronounced in winter. Data presented in this article (1) show similar changes in the dynamics of two vole species in Poland over last 25 years, (2) indicate which winter weather factors are most important for successful survival of voles and (3) demonstrate that those factors changed to disadvantage of overwintering voles, over last half–century due to global warming. The decline in vole abundance is indicated as an indirect cause for the fall in the abundance of small game observed in Poland over the last 20 years.
EN
The announcement of the European Commission concerning the European strategy in frame of power industry was published in 2007[1]. The document contains the main priorities of energetic politics of EU even to 2050. They are: - joint energy market - counteraction of the climate warming - European strategy for the security of energy supply in the case of the sharp energetic crisis. All priorities are connected with each other. They have the aims: on the one hand creating new ecological technologies of electric energy generation on the large scale and its distribution and on the other hand construction of new installations using different energy sources both conventional and unconventional supplying mainly heat energy, also in frame of the dispersed power industry.
EN
The influence of air and soil warming on root vole (Microtus oeconomicus L.) population was studied in winter period in top open chambers (OTC) (0,8-1,8 m2) warmed byy conical fiberglass material and situated in alpine meadow (33250 m) at Quinghai-Tibet Plateau, China. The OTCs were distributed on an area of 30x30 m of experimental warming site; another site of the same area was a control one. The root vole population was investigated on two pairs of sites in "low-grazing" (by sheep) parts of the meadow; mark-recapture method was used. The winter-season averaged air and soil temperature inside of the chambers were 1.3°C higher than the temperature outside the chambers. The warming in the chambers had no statistically significant effect on root vole numbers, on average body mass of individual, and on average body mass of males and females. In conclusion, as small as 1.33°C warming of soil and air introduced locally and on small (several m2) scale, in the alpine meadow habitat in winter period, has possibly no effect on root vole numbers and biomass.
10
EN
The aim of the paper is to evaluate the main patterns of temperature variations in Poland in the second half of the XX-th century. It concerns mainly the answers to 3 questions: 1) at what degree are the averaged values of temperature changed in the period 1951-2000, 2) how are the cyclic components of the observed changes, 3) are there any empirical proofs of the realisation of climate scenarios in which the warming is predicted? The spatially averaged time series of air temperature registered at 51 meteorological stations have been analysed. Several statistical methods have been used both for trends and periodicity identification: analysis of linear regression, the method of rank trend of Mann-Kendall, cumulative deviations, the J. Boryczka method of regression sinusoids, the spectral analysis after Blackmann and Tukey (1958) and singular spectral analysis (SSA) after Vautard (1992). The rise of annual mean temperature in Poland in 50-year period has been estimated as 0.9 centigrade. An increase in temperature intensified significantly after 1980. This warming occurred especially in the spring, in January, February, July and August. The temperature values in spring in 1980. and 1990. were higher then ones estimated in climate scenario (HadCM2 GS) for the middle of XXI-th century. The oscillation of the period of ca 8-year in the annual and December-March monthly temperatures has been found. It explains 31-42 percent of the observed temperature variations. On the other hand - the linear rising trend explains only 9 percent of variation. The climate model HadCM2 GS predicts the rise of annual temperature in Poland in 2050. by 1.4 centigrade from the 1981-2000 mean. However, the coincidence of the simulation with the observed temperature variation in the past is rather weak; differences concern especially the seasonal distribution of temperature changes.
EN
In the report the results of statistical analysis of the mean monthly and annual air temperature series in Poland in the period 1951-2000 have been presented. The calculated means have been based on data from 51 weather stations located at the altitude below 1000 m above the sea level. The mean of the year 2000 was a maximum value of all since 1951 and probably since the end of 18th century. The analysis of order of appearance of rising values using the method of rank trend of Mann--Kendall, has proved an essential positive trend of average annual, March and May temperature values in the period of 1951-2000. This effect has been confirmed by a simple linear trend analysis. The rise of annual mean in 50-year period has been estimated as 0,9 centigrade. The highest May, August and annual average values of temperatures in the period of 1981-2000 proved to be higher than in the period of 1951-2000. In the long-term time series of 1951-2000 a shorter 7-8 year period oscillations around average has been found. In the 80s. and 90s. the significant rise in the mean annual air temperature occurred. Some reasons of climate warming have been discussed including intensification of zonal circulation and rise of insolation in the end of studied 50-year period. The coincidence of climate warming in Poland with global temperature rise has been also stressed
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