نتایج جستجو برای: fires

تعداد نتایج: 9134  

2000
Martin Khor

The first is the burning of large tracts of forests in Indonesia (in Sumatra and Kalimantan, the Indonesian part of Borneo). Estimates of the total area of forest damaged by the fires vary from the official figure of 750,000 hectares to the figure of 1.7 million hectares made by the Indonesian environmental group WALHI.1 The forest fires, which have been going on for months, have created an eno...

Journal: :Theoretical population biology 2006
Stefano Maggi Sergio Rinaldi

We present a very simple "impact" model for the description of forest fires and show that it can mimic the known characteristics of wild fire regimes in savannas, boreal forests, and Mediterranean forests. Moreover, the distribution of burned biomasses in model generated fires resemble those of burned areas in numerous large forests around the world. The model has also the merits of being the f...

2011
KARL FRIDOLF

An experiment was carried out to examine the subjective estimation of fire growth for young adults and their perceived ability to extinguish fires. In the experiment, participants filled out a questionnaire consisting of two parts. The first part involved prediction of fire growth, and the participants were asked to estimate the times between different stages of fires. The second part involved ...

Journal: :Remote Sensing 2016
Astrid Verhegghen Hugh Eva Guido Ceccherini Frédéric Achard Valéry Gond Sylvie Gourlet-Fleury Paolo Omar Cerutti

In this study, the recently launched Sentinel-2 (S2) optical satellite and the active radar Sentinel-1 (S1) satellite supported by active fire data from the MODIS sensor were used to detect and monitor forest fires in the Congo Basin. In the context of a very strong El Niño event, an unprecedented outbreak of fires was observed during the first months of 2016 in open forests formations in the n...

2012
Melissa Anne Pfeffer Bärbel Langmann Angelika Heil Hans-F. Graf

The regional atmospheric chemistry and climate model REMOTE has been used to conduct numerical simulations of the atmosphere during the catastrophic Indonesian fires of 1997. These simulations represent one possible scenario of the event, utilizing the RETRO wildland fire emission database. Emissions from the fires dominate the atmospheric concentrations of O(3), CO, NO(2), and SO(2) creating m...

Journal: :CoRR 2012
M. P. Sivaram Kumar S. Rajasekaran

One of the major impacts of climatic changes is due to destroying of forest. Destroying of forest takes place in many ways but the majority of the forest is destroyed due to wild forest fires. In this paper we have presented a path planning algorithm for extinguishing fires which uses Wireless Sensor and Actor Networks (WSANs) for detecting fires. Since most of the works on forest fires are bas...

2016
Kai Yang Rencheng Zhang Jianhong Yang Canhua Liu Shouhong Chen Fujiang Zhang

Arc faults can produce very high temperatures and can easily ignite combustible materials; thus, they represent one of the most important causes of electrical fires. The application of arc fault detection, as an emerging early fire detection technology, is required by the National Electrical Code to reduce the occurrence of electrical fires. However, the concealment, randomness and diversity of...

2014
Christopher D. O’Connor Donald A. Falk Ann M. Lynch Thomas W. Swetnam

In recent decades fire size and severity have been increasing in high elevation forests of the American Southwest. Ecological outcomes of these increases are difficult to gauge without an historical context for the role of fire in these systems prior to interruption by Euro-American land uses. Across the gradient of forest types in the Pinaleño Mountains, a Sky Island system in southeast Arizon...

1998
Yoram J. Kaufman Chris Justice Luke Flynn Jackie Kendall Darold E. Ward

NASA plans to launch the Moderate Resolution Imaging Spectroradiometer (MODIS) on the polar orbiting Earth Observation System (EOS) for morning and evening global observations in 1998 and afternoon and night observations in 2000. These 4 MODIS daily fire observations will advance global fire monitoring with special 1 km resolution fire channels at 4 μm and 11 μm, with high saturation at 500K an...

Journal: :Philosophical Transactions of the Royal Society B: Biological Sciences 2008
Luiz Eduardo O.C Aragão Yadvinder Malhi Nicolas Barbier Andre Lima Yosio Shimabukuro Liana Anderson Sassan Saatchi

Understanding the interplay between climate and land-use dynamics is a fundamental concern for assessing the vulnerability of Amazonia to climate change. In this study, we analyse satellite-derived monthly and annual time series of rainfall, fires and deforestation to explicitly quantify the seasonal patterns and relationships between these three variables, with a particular focus on the Amazon...

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