Carbon reserves released?

Article Abstract:

Recent research suggests that high-latitude ecosystems are responding to observed global warming by releasing stored carbon as carbon dioxide (CO2). One study measuring the CO2 flux over Alaska's tundra and another which reports a north-south atmospheric CO2 gradient are both consistent with the hypothesis that the tundra has become a net carbon producer. Models used for terrestrial carbon storage remain simplistic. They are unable yet to account for the effect of increased precipitation on carbon storage or gauge the role of the oceans in the cycle.

---

Recent change of Arctic tundra ecosystems from a net carbon carbon dioxide sink to a source

Article Abstract:

Data from Alaska's North Slope show the tundra has become a net source of carbon dioxide (CO2). The tundra has historically been a CO2 sink as the carbon cycle stored carbon in the form of only partially decomposed plant remains. Recent warming may have lowered the water table which, in turn, increased plant decomposition and concentration of atmospheric CO2. If the recent warming resulted from increased greenhouse gas concentration, then the tundra ecosystem may be part of a positive feedback loop with global warming and atmospheric CO2.

Arctic regions

---

Acclimation of ecosystem CO2 exchange in the Alaskan Arctic in response to decadal climate warming

Article Abstract:

Summer CO2 flux data for Arctic ecosystems between 1960 and 1998 were studied.

Biotic communities, Tundra ecology

Similar abstracts:

• Abstracts: Primary cortical representation of sounds by the coordination of action-potential timing. Cortical remodelling induced by activity of ventral tegmental dopamine neurons
• Abstracts: Perturbation of vast ecosystems in the absence of adequate science: Alaska's Arctic Refuge. Spatiotemporal dynamics of endangered species hotspots in the United States
• Abstracts: Perturbation of vast ecosystems in the absence of adequate science: Alaska's Arctic Refuge. part 2 Reply to Povilitis: another conservation conundrum
• Abstracts: Association of Sos Ras exchange protein with Grb2 is implicated in tyrosine kinase signal transduction and transformation
• Abstracts: Aposematic coloration enhances chemosensory recognition of noxious prey in the garter snake Thamnophis radix. Prior exposure to prey cues influences chemical prey preference and prey choice in neonatal garter snakes

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.