نتایج جستجو برای: fire and earth
تعداد نتایج: 16850928 فیلتر نتایج به سال:
An April–May 2000 ‘‘Coon Creek Fire’’ burned f 37.5 km of the Sierra Ancha Mountains, 32.3 km miles north of Globe, AZ—including 25 sandstone and 19 diorite boulders surveyed in 1989 and resurveyed after the burn, after the summer 2000 monsoon season, and after the winter 2001 season. When viewed from the perspective of cumulative eroded area, both sandstone and diorite displayed bimodal patter...
* Corresponding author. Abstract – Earth observations are one way to reduce the risk to standing forests from damages caused by wild fires, since they enable early warning systems, preventive actions and faster extinguishing of fires, before they spread out. Another channel through which fire hazard can be reduced is the thinning of the forest, so the risk of a fire occurring becomes partially ...
Projected climatic warming has direct implications for future disturbance regimes, particularly fire-dominated ecosystems at high latitudes, where climate warming is expected to be most dramatic. It is important to ascertain the potential range of climate change impacts on terrestrial ecosystems, which is relevant to making projections of the response of the Earth system and to decisions by pol...
apart from other aspects, desert is a natural environment and is one of the appealing terrestrial elements. putting its symbolic and fictional senses aside, the term “desert” bears mystic sense more than material sense. in addition to the worlds materialistic experiences, desert has attracted the attention of writers because it creates a kind of inner experience, which returns the individual in...
Infrared sensors on board satellites have been widely used to collect statistics on fires, but not for fire control. Since the polar-orbiting satellites cover the northern Earth latitudes several times a day, their data are particularly suitable for detecting boreal forest fires. Currently, radiometers on board NOAA and ERS-2 satellites are used for operational fire management in Finland. Telef...
Fire is an essential Earth system process that alters ecosystem and atmospheric composition. Here we assessed long-term fire trends using multiple satellite data sets. We found that global burned area declined by 24.3 ± 8.8% over the past 18 years. The estimated decrease in burned area remained robust after adjusting for precipitation variability and was largest in savannas. Agricultural expans...
Reconstruction of fire regimes through integrated paleoecological proxy data and ecological modeling
Fire is a key ecological process affecting vegetation dynamics and land cover. The characteristic frequency, size, and intensity of fire are driven by interactions between top-down climate-driven and bottom-up fuel-related processes. Disentangling climatic from non-climatic drivers of past fire regimes is a grand challenge in Earth systems science, and a topic where both paleoecology and ecolog...
Forest fires greatly affect forest ecosystems, causing the loss of their biodiversity and resilience. In addition, they have a strong impact on global carbon balance and, ultimately, climate change. This article analyzes studies remote sensing techniques data used to estimate area burnt, fire severity, impacts, patterns reforestation at level. The study discusses results an analysis based 329 s...
Throughout much of the history of ecological science, wildfires were viewed as disasters that destroyed ecosystems. Currently, however, most scientists and managers have overcome this shortsighted view and now consider fires as ecological processes that influence structure and function in many ecosystems worldwide. Despite this, there remain several outstanding controversies regarding fire's ro...
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