Sentences with phrase «ecosystems carbon uptake»

In tropical ecosystems carbon uptake is reduced at higher temperatures.

Wårlind, D., Smith, B., Hickler, T., and Arneth, A.: Nitrogen feedbacks increase future terrestrial ecosystem carbon uptake in an individual - based dynamic vegetation model, Biogeosciences, 11, 6131 - 6146, doi: 10.5194 / bg -11-6131-2014, 2014 link

Not exact matches

The centre runs research programmes in climate variability and change, the monitoring of sea levels, ocean uptake of carbon dioxide, and Antarctic marine ecosystems.

«When you think from a climate point of view, you're not having carbon uptake across all this landscape for many decades when there's very little plant cover,» study co-author Steve Running, a University of Montana professor who models ecosystem functions, said.

The plants and their carbon uptake help the landscape provide certain «ecosystem services,» including food production, biodiversity and wildlife habitat, all of which are severely degraded when the landscape is denuded by oil and gas development.

Researchers say that much more work is needed to understand how nutrient dynamics will affect carbon uptake — particularly in forest ecosystems, which are expected to be important carbon sinks.

«With such improved satellite data we can for the first time combine global SIF observations with in - situ ecosystem scale data of gross carbon uptake.

Research conducted by Jin - Soo Kim and Professor Jong - Seong Kug from the Division of Environmental Science and Engineering at Pohang University of Science and Technology (POSTECH), in collaboration with Professor Su - Jong Jeong from the School of Environmental Science and Engineering at South University of Science and Technology of China, has shown that the warmer Arctic has triggered cooler winters and springs in North America, which has in turn weakened vegetation growth and lowered carbon uptake capacity in its ecosystems.

These variations originate primarily from fluctuations in carbon uptake by land ecosystems driven by the natural variability of the climate system, rather than by oceans or from changes in the levels of human - made carbon emissions.

Variability in carbon uptake and (re) cycling in Antarctic cryptoendolithic microbial ecosystems demonstrated through radiocarbon analysis of organic biomarkers — A. L. Brady — GE Biology

The researchers at the Laboratory for Climate Sciences and the Environment at Gif sur Yvette analysed computer models of the interactions between climate and the biosphere, and combined them with observations of carbon dioxide uptake from ecosystems, and records of crop yields.

For example, with some species of coccolithophores increasing in abundance at the expense of others, the ocean ecosystem might shift towards species that carry more carbon away from the surface and into the ocean interior, causing greater uptake of carbon into the oceans (See Langer et al., 2007).

The ocean uptake of excess atmospheric carbon dioxide, the excess above preindustrial levels driven by human emissions, causes well - understood and substantial changes in seawater chemistry that can affect marine organisms and ecosystems.

Gu's research indicates that the maximum uptake of carbon dioxide by plant ecosystems occurs when cloud cover is about 50 percent.

Thawing permafrost also delivers organic - rich soils to lake bottoms, where decomposition in the absence of oxygen releases additional methane.116 Extensive wildfires also release carbon that contributes to climate warming.107, 117,118 The capacity of the Yukon River Basin in Alaska and adjacent Canada to store carbon has been substantially weakened since the 1960s by the combination of warming and thawing of permafrost and by increased wildfire.119 Expansion of tall shrubs and trees into tundra makes the surface darker and rougher, increasing absorption of the sun's energy and further contributing to warming.120 This warming is likely stronger than the potential cooling effects of increased carbon dioxide uptake associated with tree and shrub expansion.121 The shorter snow - covered seasons in Alaska further increase energy absorption by the land surface, an effect only slightly offset by the reduced energy absorption of highly reflective post-fire snow - covered landscapes.121 This spectrum of changes in Alaskan and other high - latitude terrestrial ecosystems jeopardizes efforts by society to use ecosystem carbon management to offset fossil fuel emissions.94, 95,96

One mechanism by which fossil fuel emissions increase carbon uptake is by fertilizing the biosphere via provision of nutrients essential for tissue building, especially nitrogen, which plays a critical role in controlling net primary productivity and is limited in many ecosystems.

Impacts of large - scale and persistent changes in the MOC are likely to include changes to marine ecosystem productivity, fisheries, ocean carbon dioxide uptake, oceanic oxygen concentrations and terrestrial vegetation [Working Group I Fourth Assessment 10.3, 10.7; Working Group II Fourth Assessment 12.6, 19.3].

Researchers say that much more work is needed to understand how nutrient dynamics will affect carbon uptake — particularly in forest ecosystems, which are expected to be important carbon sinks.

The net uptake of carbon in terrestrial ecosystems has, over the past 5 decades, fluctuated between zero in some years to nearly 6 Gt C yr − 1 in others [29].

Prolonged suppression of ecosystem carbon dioxide uptake after an anomalously warm year.

Developed by Jain and his graduate students, the model includes complex physical and chemical interactions among carbon - dioxide emissions, climate change, and carbon - dioxide uptake by oceans and terrestrial ecosystems.