BACKGROUND Humans are altering the planet, including long-term global geologic
processes, at an increasing rate. Any formal recognition of an Anthropocene epoch in the …

Methane (CH4) is produced in many natural systems that are vulnerable to change under a
warming climate, yet current CH4 budgets, as well as future shifts in CH4 emissions, have …

It is unequivocal that the increases in atmospheric carbon dioxide (CO2), methane (CH4)
and nitrous oxide (N2O) since the pre-industrial period are caused by human activities. The …

Atmospheric methane grew very rapidly in 2014 (12.7±0.5 ppb/year), 2015 (10.1±0.7
ppb/year), 2016 (7.0±0.7 ppb/year), and 2017 (7.7±0.7 ppb/year), at rates not observed …

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 …

From 2007 to 2013, the globally averaged mole fraction of methane in the atmosphere
increased by 5.7±1.2 ppb yr− 1. Simultaneously, δ13CCH4 (a measure of the 13C/12C …

Recent bursts in the incidence of large wildfires worldwide have raised concerns about the
influence climate change and humans might have on future fire activity. Comparatively little …

The Earth's climate is determined by a number of complex connected physical, chemical and
biological processes occurring in the atmosphere, land and ocean. The radiative properties …