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    Wyświetlanie 1-7 z 7
    Tytuł:
    Application of the BAI index for the classification of the burned area in ground measurements
    Autorzy:
    Szajewska, Anna
    Powiązania:
    https://bibliotekanauki.pl/articles/973062.pdf
    Data publikacji:
    2019
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    BAI
    burned area classification
    remote sensing
    wildfire
    Opis:
    Quick determination of the area of the burned forest or field caused by the fire is important when estimating losses, monitoring the rebirth of vegetation on the site of fire and planning strategies for forest reconstruction. In order to provide quick information about the area burned by large fires, the BAI index (Burn Area index) is used. This index is obtained using optical methods of satellite remote sensing. In Poland, most fires are the fires of soil cover, the area of which does not exceed 1 ha. In such cases, the use of satellite technology is not applicable due to a number of limitations that are discussed in the text. The article presents the possibility of using the BAI index from a small height. Since the BAI index was originally used for satellite measurements, the article discusses the differences in ground measurements. Experimental research has been described and results from controlled firing have been presented.
    Źródło:
    Measurement Automation Monitoring; 2019, 65, 2; 37-40
    2450-2855
    Pojawia się w:
    Measurement Automation Monitoring
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evidence of wildfires during deposition of the Upper Silesian Keuper succession, southern Poland
    Autorzy:
    Kubik, R.
    Uhl, D.
    Marynowski, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/191789.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    charcoals
    wildfire
    fusinite reflectance
    taphonomy
    Upper Triassic
    Polska
    Opis:
    Charcoals from the Upper Triassic vertebrate-bearing clays of the Zawiercie area (Upper Silesia, S-Poland) were analyzed using petrographic methods, to reconstruct burning temperatures as well as taphonomic processes. SEM and reflected light microscopy show excellent preservation of charcoals most probable connected with early diagenetic permineralization by calcite. The charcoal was assigned to three morphotypes, probably corresponding to three different fossil taxa. Fusinite reflectance data suggest, that the highest temperature reached above 600 °C (fusinite reflectance of 3.59%), what counterparts to the lower limit crown fire temperature. The values for most of the samples are lower (ca. 1% to 2.5%) what is typical for surface fires. In many cases fusinite reflectance values depends on the measured zone within the sample. Such zonation formed due to charring tem- perature differences. In zones remote from the potential fire source, reflectance values gradually decreases. It implies that calculation of fire temperatures based on average fusinite reflectance values might be too far-reaching simplification. Occurrence of fungal hyphae within the charcoal supports the interpretation of a predomination of surface fire, consuming dead twigs and stems. The low content of micro-charcoals in charcoal-bearing rocks as well as rounded to sub-rounded shapes of large specimens indicates that they were transported after burning, deposited away from the burning area, and finally early diagenetic mineralization.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2015, 85, 4; 685-696
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Experimental and Case studies of Long-distance Multi-hopping Data Transmission Techniques for Wildfire Sensors Using the LoRa-Based Mesh Sensor Network
    Autorzy:
    Khonrang, Jarun
    Somphruek, Mingkwan
    Duangnakhorn, Pairoj
    Siri, Atikhom
    Boonlom, Kamol
    Powiązania:
    https://bibliotekanauki.pl/articles/27311934.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    LoRa-Based Mesh Sensor
    Wireless Internet of Things Technology (WIoT)
    Wildfire Sensor
    Opis:
    This study proposes the LoRa-Based Mesh Sensor Network without relying on LoRaWAN connection sending the communication data in the form of Star-to-Star, it can be sends the data in the form of peer-to-peer without the gateway. In the case that a longer distance is needed, the system is connected by a means of multi-hop presenting the hardware and software model through the use of low voltage power. Then, the testing is done using point to point and the received signal is measured by a gauge and compared with the model in accordance with the theoretical principle.
    Źródło:
    International Journal of Electronics and Telecommunications; 2023, 69, 3; 419--424
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Long-term fire effects of the drained open fen on organic soils
    Długotrwały wpływ pożaru osuszonego torfowiska niskiego na właściwości gleb organicznych
    Autorzy:
    Sulwiński, M.
    Mętrak, M.
    Suska-Malawska, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/205150.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    wetland fire
    peat fire
    fen
    wildfire
    obszar wypalony
    obszar niewypalony
    gleba torfowa
    torfowisko
    pożar
    Opis:
    Fire has considerable impact on vegetation and organic soils properties. As we observed that the differences between vegetation of burnt and unburnt areas on the rich fen are visible 11 years after the fire, we assumed that the post-fire changes are long lasting, yet limited exclusively to the burnt areas. In order to check this hypothesis we studied spatial differentiation of physical and chemical properties of soils, and productivity capacities of burnt and unburnt areas in the fen in Biebrza National Park. We took soil samples from the neighboring burnt and unburnt areas, from the depth of 0–30 cm and 30–50 cm. We analyzed 21 parameters of the soils including: pH, ash content, moisture, bulk density, exchangeable K, Na, Ca, available P, N-NH4+, N-NO3−, total N, C, K, Na, Ca, Mg, Fe, P; and calculated C:N, C:P ratios. Surface layer of the burnt soils differed significantly from the unburnt soils in respect of 17 out of 21 parameters. The most pronounced difference was observed for available phosphorous (on average 6 times higher for the burnt soils). The differences in the deeper layer were mostly insignificant. The burnt areas were also characterized by twofold higher plant productivity than recorded for the unburnt areas. The influence of fire on peaty soils was long lasting but mostly limited to the surface layer of the soils. In the case of particular soil features, the post-fire differences were modified by advanced muck formation (moorshing) processes in the unburnt areas. Since the fire led to long lasting increase of fertility, the recovery of fen vegetation is unlikely.
    Pożary wpływają istotnie na roślinność oraz właściwości gleb organicznych. Zaobserwowano, że nawet po 11 latach od wystąpienia podpowierzchniowego pożaru torfowiska niskiego wciąż istnieją wyraźne różnice pokrywy roślinnej obszarów wypalonych i niewypalonych. Na tej podstawie założono, że wpływ pożaru na ekosystem torfowiskowy jest długotrwały, jednak nie jest widoczny na sąsiednich obszarach niewypalonych. W celu weryfikacji tej hipotezy zbadano właściwości fizyczne i chemiczne gleby, a także produktywność biomasy roślinnej na torfowisku niskim zlokalizowanym w Biebrzańskim Parku Narodowym. Z sąsiadujących obszarów wypalonych oraz niewypalonych, z głębokości 0–30 cm oraz 30–50 cm pobrano próby gleby torfowej. Przeanalizowano 21 cech gleby: pH, popielność, wilgotność, gęstość, wymiennie związane K, Na, Ca, dostępne dla roślin P, N-NH4+, N-NO3-, całkowite N, C, K, Na, Ca, Mg, Fe, P; oraz obliczono stosunki C:N, C:P, Fe:P. W 17 na 21 przebadanych cech stwierdzono istotne różnice w chemizmie wierzchniej warstwy gleby pobranej z miejsc wypalonych i niewypalonych. Najbardziej wyraźną różnicą było zwiększenie (średnio sześciokrotnie) zawartości dostępnego P w glebach z obszarów wypalonych. W większości badanych cech warstwy głębszej nie stwierdzono istotnych różnic. Obszary wypalone charakteryzowały się dwukrotnie wyższą produktywnością biomasy roślinnej. Stwierdzono, że wpływ pożaru na glebę torfową jest długotrwały i ograniczony głównie do jej wierzchniej warstwy. Część zaobserwowanych różnic może jednak wynikać z postępującego procesu murszenia torfu, zachodzącego na obszarach niewypalonych. Z powodu zwiększenia dostępności pierwiastków biogennych scenariusz powrotu typowych zbiorowisk torfowisk niskich na obszary wypalone nie wydaje się prawdopodobny.
    Źródło:
    Archives of Environmental Protection; 2017, 43, 1; 11-19
    2083-4772
    2083-4810
    Pojawia się w:
    Archives of Environmental Protection
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Radiative power of wildfires in Siberia on the basis of TERRA/Modis imagery processing
    Autorzy:
    Ponomarev, E.I.
    Powiązania:
    https://bibliotekanauki.pl/articles/38456.pdf
    Data publikacji:
    2013
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    radiative power
    wildfire
    Siberia
    TERRA/Modis imagery processing
    satellite technique
    fire radiative power
    Opis:
    Variety of radiation power of wildfire was investigated by processing TERRA/Modis imagery in 4 μm spectral band. Fire radiative power (FRP) was used for calibrating high-temperature event database obtained by the satellite technique. An analysis was performed on the database of Siberian wildfires for 2010– 2012. Dynamics of FRP was investigated for a number of wildfires including some cases of crown fire. FRP variation was evaluated for various forest zones of Siberia. Classification of wildfires was elaborated in terms of FRP value as a GIS-layer over the territory of Siberia.
    Źródło:
    Folia Forestalia Polonica. Series A . Forestry; 2013, 55, 2
    0071-6677
    Pojawia się w:
    Folia Forestalia Polonica. Series A . Forestry
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Specjacja fosforu w leśnych glebach rdzawych na obszarach popożarowych
    Phosphorus fractionation in forest Brunic Arenosols of post-fire areas
    Autorzy:
    Jonczak, J.
    Olejarski, I.
    Janek, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/985713.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    Nadlesnictwo Rudy Raciborskie
    tereny popozarowe
    gleby lesne
    gleby rdzawe
    gleby popozarowe
    fosfor
    specjacja chemiczna
    phosphorus
    sequential extraction
    wildfire
    brunic arenosols
    leaching
    Opis:
    The studies on contents and profile distribution of total phosphorus and its fractions extracted according to the procedure of Hedley et al. [1982] in a modification of O’Halloran et al. [1987] in forest Brunic Arenosols of post−fire areas in the Rudy Raciborskie Forest District (S Poland) were undertaken. Five soil profiles developed from fluvioglacial sandy deposits of the Oder Glaciation were described and sampled 21 years after the fire occurrence and analyzed using standard procedures. Total content of the element was among typical for Brunic Arenosols of Poland, ranging from 683.1 to 880.4 mg/kg in Ofh horizons, from 154.2 to 566.5 mg/kg in mineral horizons affected by soil−forming processes and from 115.5 to 384.2 mg/kg in parent material. The content of distinguished phosphorus fractions varied, reflecting the effect of environmental factors and brunification soil−forming process. Residual fraction predominated in parent material, organic in O and most of A−horizons and bounded to sesquioxides in B−horizons. The observed proportions between residual fraction and sum of the remaining fractions were typical for soils of old−glacial areas, reflecting considerable degree of mineral substrate weathering. An effect of fire was not clear due to the lack of a reference soil. However, the studied soils showed some specific features, that can be explained by the influence of fire. Low content of fraction bounded to calcium and apatites is the first and elevated concentration of fraction bounded to sesquioxides in parent material is the other one. Profile distribution patterns of mentioned above fractions suggest leaching of phosphorus labile forms and their stabilization in deeper parts of the studied soils. This process could be initialized or accelerated by fire. Finally, it can be concluded, that studied properties of the contemporary soils are stronger influenced by pine forest vegetation than by fire before 21 years.
    Źródło:
    Sylwan; 2019, 163, 05; 396-406
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Triassic micro-charcoal as a promising puzzle piece in palaeoclimate reconstruction: An example from the Germanic Basin
    Autorzy:
    Götz, Anette E.
    Uhl, Dieter
    Powiązania:
    https://bibliotekanauki.pl/articles/2171822.pdf
    Data publikacji:
    2022
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    wildfire
    palaeoclimate
    Triassic
    Peri-Tethys
    Germany
    Opis:
    Fossil charcoal is the primary source of evidence for palaeo-wildfires and has gained increasing interest as a proxy in the reconstruction of past climates and environments. Today, increasing temperatures and decreasing precipitation/humidity appear to correlate with increases in the frequency and intensity of wildfires in many regions worldwide. Apart from appropriate climatic conditions, sufficient atmospheric oxygen (>15%) is a necessary precondition to sustain combustion in wildfires. The Triassic has long been regarded as a period without evidence of wildfires; however, recent studies on macro-charcoal have provided data indicating their occurrence throughout almost the entire Triassic. Still, the macro-palaeobotanical record is scarce and the study of micro-charcoal from palynological residue is seen as very promising to fill the gap in our current knowledge on Triassic wildfires. Here, the authors present the first, verified records of micro-charcoal from the Triassic of the Germanic Basin, complementing the scarce macro-charcoal evidence of wildfires during Buntsandstein, Muschelkalk and Keuper (Anisian-Rhaetian). The particles analysed by means of scanning electron microscopy (SEM) show anatomical features typical of gymnosperms, a major element of the early Mesozoic vegetation following the initial recovery phase after the PT-boundary event. From the continuously increasing dataset of Triassic charcoal, it becomes apparent that the identification of wildfires has a huge potential to play a crucial role in future studies, deciphering Triassic climate dynamics. The first SEM study of micro-charcoal from palynological residue spanning the entire Triassic period, presented here, is a key technique to further unravel the charcoal record as a puzzle piece in palaeoclimate reconstruction.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2022, 92, 3; 219--231
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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