Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

Wyszukujesz frazę "climate data" wg kryterium: Temat


Tytuł:
Multi-criteria simulation model for determining dengue outbreaks
Autorzy:
Jakubowski, Piotr
Erandi, Hasitha
Mahasinghe, Anuradha
Perera, Sanjeewa
Ameljańczyk, Andrzej
Tematy:
climate data
mobility
fuzzy sets
Pareto optimization
Pokaż więcej
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Powiązania:
https://bibliotekanauki.pl/articles/1839259.pdf  Link otwiera się w nowym oknie
Opis:
In this study, we develop a multi-criteria model to identify dengue outbreak periods. To validate the model, we performed a simulation using dengue transmission-related data in Sri Lanka’s Western Province. Our results indicated that the developed model can be used to predict a dengue outbreak situation in a given region up to one month in advance.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Drought prediction in the Lepelle River basin, South Africa under general circulation model simulations
Autorzy:
Ikegwuoha, Darlington C.
Dinka, Megersa O.
Tematy:
drought
high-resolution-climate-data
Lepelle-River-Basin
representative concentration pathways (RCPs)
weather evaluation and planning (WEAP)
Pokaż więcej
Wydawca:
Instytut Technologiczno-Przyrodniczy
Powiązania:
https://bibliotekanauki.pl/articles/946901.pdf  Link otwiera się w nowym oknie
Opis:
This study aims to evaluate changes in the frequency and severity of historical droughts (1980–2018) and then model future droughts occurrences (2019–2099) in the Lepelle River Basin (LRB), using Intergovernmental Panel on Climate Change (IPPC) General Circulation Model (GCM) simulations for two representative concentration pathways (RCP8.5 and RCP4.5). Firstly, the present-day and future hydrology of the LRB are modelled using the weather evaluation and planning (WEAP) model. Mann–Kendall tests are conducted to identify climate trends in the LRB. The reconnaissance drought index (RDI) and the streamflow drought index (SDI) are employed to explore hydro-meteorological droughts in the Lepelle River Basin, South Africa. The RDI and SDI are plotted over time to assess drought magnitude and duration. The simulated temporal evolution of RDI and SDI show a significant decrease in wetting periods and a concomitant increasing trend in the dry periods for both the lower and middle sections of the LRB under RCP4.5 as the 22nd century is approached. Lastly, the Spearman and Pearson correlation matrix is used to determine the degrees of association between the RDI and SDI drought indices. A strong positive correlation of 0.836 is computed for the middle and lower sections of the LRB under the RCP8.5 forcing. Further findings indicate that severe to extreme drought above –2.0 magnitude are expected to hit the all three sections of the LRB between 2080 and 2090 under RCP8.5. In the short term, it is suggested that policy actions for drought be implemented to mitigate possible impacts on human and hydro-ecological systems in the LRB.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Using artificial neural networks to predict the reference evapotranspiration
Autorzy:
Abo El-Magd, Amal
Baraka, Shaimaa M.
Eid, Samir F.M.
Tematy:
climate data
ETo calculator
feedforward artificial neural networks
Penman-Monteith method
reference evaporation
root mean square error
Pokaż więcej
Wydawca:
Instytut Technologiczno-Przyrodniczy
Powiązania:
https://bibliotekanauki.pl/articles/27312640.pdf  Link otwiera się w nowym oknie
Opis:
Artificial neural network models (ANNs) were used in this study to predict reference evapotranspiration (ETo) using climatic data from the meteorological station at the test station in Kafr El-Sheikh Governorate as inputs and reference evaporation values computed using the Penman-Monteith (PM) equation. These datasets were used to train and test seven different ANN models that included different combinations of the five diurnal meteorological variables used in this study, namely, maximum and minimum air temperature (Tmax and Tmin ), dew point temperature (Tdw), wind speed (u), and precipitation (P), how well artificial neural networks could predict ETo values. A feed-forward multi-layer artificial neural network was used as the optimization algorithm. Using the tansig transfer function, the final architected has a 6-5-1 structure with 6 neurons in the input layer, 5 neurons in the hidden layer, and 1 neuron in the output layer that corresponds to the reference evapotranspiration. The root mean square error (RMSE) of 0.1295 mm∙day -1 and the correlation coefficient (r) of 0.996 are estimated by artificial neural network ETo models. When fewer inputs are used, ETo values are affected. When three separate variables were employed, the RMSE test values were 0.379 and 0.411 mm∙day -1 and r values of 0.971 and 0.966, respectively, and when two input variables were used, the RMSE test was 0.595 mm∙day -1 and the r of 0.927. The study found that including the time indicator as an input to all groups increases the prediction of ETo values significantly, and that including the rain factor has no effect on network performance. Then, using the Penman-Monteith method to estimate the missing variables by using the ETo calculator the normalised root mean squared error (NRMSE) reached about 30% to predict ETo if all data except temperature is calculated, while the NRMSE reached about of 13.6% when used ANN to predict ETo using variables of temperature only.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Agro-climatic zoning in Egypt to improve irrigation water management
Wyznaczanie agroklimatycznej strefowości w Egipcie w celu poprawy gospodarki wodnej
Autorzy:
Noreldin, T.
Ouda, S.
Amer, A.
Tematy:
30-year climate data
efficient water use
governorates
Penman–Monteith equation
potential evapotranspiration
ewapotranspiracja potencjalna
gubernatorstwo
równanie Penmana-Monteitha
trzydziestoletnie dane klimatyczne
wydajne użytkowanie wody
Pokaż więcej
Wydawca:
Instytut Technologiczno-Przyrodniczy
Powiązania:
https://bibliotekanauki.pl/articles/292667.pdf  Link otwiera się w nowym oknie
Opis:
The objective of this paper was to develop agro-climatic zones in the old cultivated lands of Egypt in the Nile Delta and Valley using climate normals from 1985–2014 to facilitate better irrigation water management under water scarcity conditions. 30-yearmonthly climate data were collected for 17 agricultural governorates in Egypt and yearly averages and 30-year averages were calculated. BISm model was used to calculate yearly averages of potential evapotranspiration (PET) and 30-year average for each governorate. Analysis of variance was done using one factor randomize complete block design, with number of years as replicates. Furthermore, the mean, the range and R2 were calculated to test the strength of the relationship between PET and climate elements. The means of PET for each governorate was separated and ranked in ascending order using least significant difference test (LSD0.05). The results identified 7 agro-climatic zones (LSD0.05 = 0.146). These zones were: (1) Alexandria; (2) Demiatte, Kafr El-Sheikh and Dakhlia; (3) El-Behira, and El-Gharbia; (4) El-Minofia, El-Sharkia, El-Kalubia, Giza and El-Fayom; (5) Beni Sweif, El-Minia, Assuit and Sohag; (6) Qena; and (7) Aswan. Such zoning will increase the ability of the Egyptian policy makers to prepare the appropriate water management and development policies as a result of the availability of proper information on each zone aiming at efficient use of the limited water resources.
W pracy wyodrębniono strefy agroklimatyczne na uprawianych od dawna ziemiach doliny i delty Nilu w Egipcie na podstawie danych klimatycznych z lat 1985–2011 w celu usprawnienia zarządzania nawodnieniami w warunkach deficytu wody. Zebrano miesięczne dane klimatyczne z 30 lat z 17 gubernatorstw o charakterze rolniczym w Egipcie i obliczono wartości średnie roczne analizowanych parametrów oraz średnie z 30 lat. Użyto modelu BISm do obliczenia średnich rocznych wartości ewapotranspiracji potencjalnej (ETP) i średniej wartości ETP z 30 lat dla każdego gubernatorstwa. Przeprowadzono jednoczynnikową analizę wariancji losowych bloków z liczbą lat jako powtórzeniem. Ponadto obliczono średnią, zakres i współczynnik determinacji R2 dla ustalenia siły zależności pomiędzy ETP i czynnikami klimatycznymi. Średnie wartości ETP obliczono dla każdego gubernatorstwa i uporządkowano rosnąco, stosując test najmniejszej istotnej różnicy (LSD0,05). Wyodrębnione strefy to: 1) Aleksandria, 2) Demiatte, Kafr El-Sheikh i Dakhlia, 3) El-Behira i El-Gharbia, 4) El-Minofia, El-Sharkia, El-Kalubia, Giza i El-Fayom, 5) Beni Sweif, El-Minia, Assuit i Sohag, 6) Qena i 7) Assuan. Podział na te strefy przyczyni się do zwiększenia zdolności czynników decyzyjnych w Egipcie do prowadzenia odpowiedniej gospodarki wodnej i polityki rozwoju dzięki dostępności do właściwej informacji o każdej strefie w celu efektywnego użytkowania ograniczonych zasobów wodnych.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Temperature and Rainfall Trend in Alaknanda Valley Srinagar Garhwal, Uttarakhand, India
Autorzy:
Negi, R. S.
Sagar Gautam, Alok Sagar
Singh, Santosh
Tematy:
Climate Change
Meteorological data
Rainfall
Temperature
Trend
Pokaż więcej
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Powiązania:
https://bibliotekanauki.pl/articles/1164126.pdf  Link otwiera się w nowym oknie
Opis:
The rainfall and temperatures are the most important parameters among the atmosphere as these parameters decide the ecological situation of the specific area, which affects the agricultural productivity. The temperature, and rainfall trends are analysed for meteorological data of Automatic Weather Station (AWS), was installed September 2009 with 22 meteorological parameters in the Department of Rural Technology, HNB Garhwal, University, Srinagar Garhwal, and Uttarakhand. In the study assess the seven-year change in temperature and rainfall has been examination by linear tread analysis. It is observed that in velley of Srinagar Garhwal, Uttarakhand, coefficient of variation for mean temperature for Srinagar Garhwal Valley is highest in the month of February and lowest in the month of August. This means that mean temperature is most stable in the month of August and total monthly rainfall observed highest in the month of November and minimum for the month of July. This shows that rainfall is more stable in the month of July and is more variable in the month of November for the Valley.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The climate of Łeba
Warynki klimatyczne Łeby
Autorzy:
Baranowski, D.
Tematy:
Leba town
climate
sea coast
tourist infrastructure
health resort
holiday
climate condition
meteorological data
Pokaż więcej
Wydawca:
Akademia Pomorska w Słupsku
Powiązania:
https://bibliotekanauki.pl/articles/85117.pdf  Link otwiera się w nowym oknie
Opis:
Quickly developing tourist infrastructure of Łeba, including the needs of the city as a health resort and a perfect place for holiday at any time of the year, requires an elaboration of the comprehen-sive climatic characteristics. Taking into consideration the needs of the typical holiday makers and people with respiratory, circulatory and rheumatic diseases or metabolic disorders, elaboration of an appropriate description of the local climatic conditions in one of the most often visited spa on the Polish sea coast is more and more crucial. Daily meteorological data from the IMGW weather station in Łeba for the period 1986-2005 were the basis for this paper. The climatological analysis, besides the characteristics of the air tempera- ture and precipitation, includes the distribution of other principal meteorological elements (pres-sure, wind, sunshine hours, cloudiness, relative humidity) and the frequency of weather phenom-ena (fogs, storms).
W dobie szybko rozwijającej się szeroko rozumianej infrastruktury turystycznej Łeby, uwzględniającej zarówno potrzeby lecznictwa uzdrowiskowego, jak i aktywnego spędzania czasu wolnego czy wypoczynku, opracowanie warunków klimatycznych jednego z najliczniej odwiedzanych kurortów polskiego wybrzeża jest zagadnieniem pierwszoplanowym. Ułatwi to nie tylko przygotowanie profesjonalnej oferty turystycznej lecz również, jak mam nadzieję, będzie bodźcem do dalszych, bardziej szczegółowych analiz z tego zakresu. Podstawą opracowania są codzienne dane pomiarowe ze stacji synoptycznej IMGW w Łebie z lat 1986-2005. Analiza klimatyczna, oprócz charakterystyk termicznych i opadowych, uwzględnia również rozkład innych podstawowych elementów meteorologicznych (ciśnienia, wiatru, usłonecznienia, zachmurzenia, wilgotności względnej) oraz częstość występowania wybranych zjawisk pogodowych (mgieł i burz).
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Method to Incorporate Transition Risk Stress Testing Into Probability of Default (PD) Models for Retail Portfolios
Autorzy:
Ptak-Chmielewska, Aneta
Kopciuszewski, Paweł
Toledo, Alvaro Fernandez
Tematy:
stress tests
climate risk
NGFS data
Pokaż więcej
Wydawca:
Uniwersytet Warszawski. Wydawnictwo Naukowe Wydziału Zarządzania
Powiązania:
https://bibliotekanauki.pl/articles/60553679.pdf  Link otwiera się w nowym oknie
Opis:
Climate risk is one of the type of risks in a bank’s portfolio which is not fully recognized, and its impact on the future overall risk changes is hidden due to lack of sufficient knowledge at the moment. One of the most common data comes from Network for Greening the Financial System (NGFS) scenarios related to climate change (physical risk) and climate policy and technology trends (transition risk). In the paper we focused on the transition risk scenarios and their impact on the economy and in particular on credit risk. Our main goal was to check the tendency in the probability of default (PD) default prediction in relation to climate risk potential future scenarios. We used data related to credit risk observed in Southern Europe banks for mortgage products for the years 2003–2019. Based on PD models we predicted the changes in the PD parameter over many years ahead by considering the set of scenarios collected in NGFS data. We selected the two scenarios ‘carbon tax revenue from the residential and commercial sector’ and ‘electricity price at the final level in the transportation sector’ for building the final models. From the PD logit model and linear predictors for the PD model we found that the main determinants predicting PD correlating with NGFS scenarios are LTV, customer income, unemployment rate, and crude oil prices. The quality of univariate models is above average, and the quality of the PD model is on an average level. The proposed models can be used in banking as stress tests in climate risk management.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The kinematic and thermodynamic environment during cloud-to-ground lightning occurrence in Poland
Autorzy:
Sulik, Sławomir
Taszarek, Mateusz
Tematy:
lightning
thunderstorm
convection
climate change
reanalysis data
Polska
Pokaż więcej
Wydawca:
Instytut Meteorologii i Gospodarki Wodnej - Państwowy Instytut Badawczy
Powiązania:
https://bibliotekanauki.pl/articles/58906736.pdf  Link otwiera się w nowym oknie
Opis:
This study identifies convective and kinematic parameters that positively influence elevated values of cloud-to-ground lightning flashes (CGs) in Poland. The analysis used data from the PERUN lightning detection and location system from IMGW-PIB and reanalyses of the ERA5 model from ECMWF for the period 2002-2020. In addition, a spatial-temporal distribution analysis was carried out for the period 1940-2022, covering the key parameters necessary for the appearance of convection. Results showed that thunderstorms most often occur in the summer, but also that there are increasingly favorable conditions for the appearance of organized multicellular systems in the spring. CG flashes most often form in a most-unstable convective available potential energy (MU CAPE) environment of about 1300 J/kg along with vertical wind shear (0-6 km AGL bulk wind shear) of 13-14 m/s. Using the WMAXSHEAR parameter, it was possible to conclude that overlapping CAPE and DLS values of about 500 m2/s2 imply increased electrical activity. At the same time, a high correlation with the Hail Size Index (HSI) parameter implies a positive relationship between the occurrence of hailstorms and an increased number of CGs generated in the case of supercells. The research also found a gradual increase in air temperature, MU CAPE, MU Mixing Ratio and the MU WMAXSHEAR parameter for the area under study.
Dostawca treści:
Biblioteka Nauki
Artykuł

Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies