Human impacts prior to the Industrial Revolution are not well constrained. We investigate
whether the decline in global atmospheric CO 2 concentration by 7–10 ppm in the late …

Time is divided by geologists according to marked shifts in Earth's state. Recent global
environmental changes suggest that Earth may have entered a new human-dominated …

Fires have influenced atmospheric composition and climate since the rise of vascular plants,
and satellite data have shown the overall global extent of fires. Our knowledge of historic fire …

This chapter addresses the biogeochemical cycles of carbon dioxide (CO2), methane (CH4),
and nitrous oxide (N2O). The three greenhouse gases have increased in the atmosphere …

Whether ignited by lightning or by Native Americans, fire once shaped many North American
ecosystems. Euro–American settlement and 20th‐century fire suppression practices …

We synthesize existing sedimentary charcoal records to reconstruct Holocene fire history at
regional, continental and global scales. The reconstructions are compared with the two …

The location, timing, spatial extent, and frequency of wildfires are changing rapidly in many
parts of the world, producing substantial impacts on ecosystems, people, and potentially …

Climate is an important control on biomass burning, but the sensitivity of fire to changes in
temperature and moisture balance has not been quantified. We analyze sedimentary …

Fire is an integral component of the Earth system that will critically affect how terrestrial
carbon budgets and living systems respond to climate change. Paleo and observational …

A series of publications purport to provide evidence that the Earth was subjected to an
extraterrestrial event or events at∼ 12.9 ka creating an environmental cataclysm and the …