نتایج جستجو برای: burned area
تعداد نتایج: 588132 فیلتر نتایج به سال:
[1] This paper presents an evaluation of advanced very high resolution radiometer (AVHRR)-based remote sensing algorithms for detecting active vegetation fires [Li et al., 2000a] and mapping burned areas [Fraser et al., 2000] throughout North America. The procedures were originally designed for application in Canada with AVHRR data aboard the NOAA 14 satellite. They were tested here with both N...
[1] We used historic records from 1959–99 to explore fire regime characteristics at ecozone scales across the entire North American boreal region (NABR). Shifts in the NABR fire regime between the 1960s/70s and the 1980s/90s were characterized by a doubling of annual burned area and more than a doubling of the frequency of larger fire years because of more large fire events (>1,000 km). The pro...
Fire is a major disturbance factor influencing the formation and maintenance of oak (Quercus)-dominated forests of eastern North America. Fire suppression practices have resulted in declining oak dominance, and caused the loss of oak seedlings due to poor light regimes and vegetative competition. Both wildfires and prescribed fires can alter forest stand composition and influence succession. Fi...
Collectively, landscape structure, fuel loading, and weather control wildland fires. Our objective was to examine the impacts of landscape structure, weather and fire-ignition location on fire spread using FARSITE. We simulated surface fires in the Chequamegon National Forest, Wisconsin, on five landscapes: a control and four harvested landscapes created using HARVEST by varying the amount (2% ...
Rainfall simulations allow for controlled comparisons of runoff and erosion among ecosystems and land cover conditions. Runoff and erosion can increase greatly following fire, yet there are few rainfall simulation studies for post-fire plots, particularly after severe fire in semiarid forest. We conducted rainfall simulations shortly after a severe fire (Cerro Grande) in ponderosa pine forest n...
Early goal directed therapy (EGDT) provided at the earliest stages of burn shock, has significant benefits for ordinary burn patients, however, its effect on patients with more than 80% of total surface area burned (TBSA) still remains unclear. In this study, 34 extensively burned patients with (87.3±5.6)% of total surface area burned were collected from January 2008 to January 2014. All burn p...
Forest fires are frequent in the Siberian taiga and are predicted to increase in frequency as a result of increased fire risk under drought conditions, and prolonged fire seasons caused by climate change. There is, however, some uncertainty as to the extent to which drought influences forest fire frequency at a regional scale. Here, we present an analysis of satellite derived soil moisture anom...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید