Results 261 to 270 of about 3,482,440 (295)
Some of the next articles are maybe not open access.
Net Ecosystem Exchange of CO2 in Permafrost Larch Ecosystems
2009Carbon dioxide exchange between the ecosystem and the atmosphere would be a major component for carbon budget at boreal forests. In this chapter, net ecosystem exchange (NEE) of CO2 at a permafrost larch ecosystem will be discussed, based on a micrometeorological (tower flux) measurement.
openaire +1 more source
Subnivean Arctic and sub-Arctic net ecosystem exchange (NEE)
Progress in Physical Geography: Earth and Environment, 2013In the Arctic and sub-Arctic, up to half of annual net ecosystem exchange (NEE) occurs during the snow season. Subnivean soil respiration can persist at a greater rate when the overlying snowpack has a lower thermal conductivity, and the rate of photosynthetic uptake at the start and end of the snow season can be diminished by ...
Kristina A. Luus +3 more
openaire +1 more source
Net ecosystem exchange, evapotranspiration and canopy conductance in a riparian forest
Agricultural and Forest Meteorology, 2011Abstract The ecosystem fluxes of mass and energy were quantified for a riparian cottonwood (Populus fremontii S. Watson) stand, and the daily and seasonal courses of evapotranspiration, CO2 flux, and canopy conductance were described, using eddy covariance.
John Kochendorfer +4 more
openaire +1 more source
Mapping the Net Ecosystem Exchange of Co2 of Global Terrestrial Systems
2022Net ecosystem exchange of CO2 (NEE) is a useful tool to analyze the carbon balance of different areas. Since it is impossible to measure NEE in-situ at a regional or global scale, this study has conducted a NEE estimation model to map the NEE of global terrestrial systems.
Yi Lian +9 more
openaire +1 more source
The Net Ecosystem Exchange at Permafrost in Cambridge Bay, Nunavut, Canada
Polar Knowledge Aqhaliat Report, 2019There are large uncertainties in understanding the timing and magnitude of the permafrost carbon- climate feedback. This is, in part, due to lack of field measurements. To better understand the mechanisms of exchange processes and to improve climate models, it is important to continuously monitor carbon exchanges at various permafrost locations in the ...
Juyeol Yun +7 more
openaire +1 more source
Annual net ecosystem carbon exchange by a sugar beet crop
Agricultural and Forest Meteorology, 2006Eddy covariance measurements of CO2 fluxes were conducted in 2004 at the agricultural site of Lonzee, Belgium, over a sugar beet crop. Additional measurements of biomass net primary production and leaf area index (LAI) were carried out. The response of the fluxes to climatic and non-climatic variables was analysed.
Moureaux, Christine +4 more
openaire +2 more sources
Net CO 2 exchange of a subarctic mountain birch ecosystem
Theoretical and Applied Climatology, 2001Net ecosystem CO2 exchange was measured over a mountain birch forest in northern Finland throughout the growing season. The maximal net CO2 uptake rate of about − 0.5 mg(CO2) m−2 s−1 was observed at the end of July. The highest nocturnal respiration rates in early August were 0.2 mg(CO2) m−2 s−1.
M. Aurela, J.-P. Tuovinen, T. Laurila
openaire +1 more source
Net ecosystem exchange of grassland in contrasting wet and dry years
Agricultural and Forest Meteorology, 2006Temperate grasslands represent about 32% of the earth’s land area and cover approximately 56% of the area of Ireland; yet their role as sources/sinks of atmospheric CO2 is not well quantified. We used an eddy covariance (EC) system to measure the net ecosystem exchange (NEE) at a managed grassland site in southern Ireland for 2 years.
Vesna Jaksic +6 more
openaire +1 more source
Nitrogen effects on net ecosystem carbon exchange in a temperate steppe
Global Change Biology, 2009AbstractIt has widely been documented that nitrogen (N) enrichment stimulates plant growth and net primary production. However, there is still dispute on how N addition affects net ecosystem CO2 exchange (NEE), which represents the balance between ecosystem carbon (C) uptake and release.
SHULI NIU +6 more
openaire +1 more source
Net Ecosystem Exchange (NEE) of the Island of Pianosa.
2004The overall gas exchange occurring between Mediterranean ecosystems and the atmosphere has been rarely quantified experimentally, but due to the occurrence of prolonged summer drought that limits gas exchange, the potential carbon (C) sink of Mediterranean ecosystems is generally considered low.
Vaccari FP +7 more
openaire +2 more sources