Results 41 to 50 of about 861,969 (281)

Improving model estimates of gross primary production [PDF]

Eos, Transactions American Geophysical Union, 2011
Balancing the global carbon budget is a daunting task complicated by the fact that even the most essential values elude direct observation. Gross primary production, the amount of carbon used by terrestrial vegetation to fuel its annual growth, is often estimated by extrapolation from observations using climate models, including the Community Land ...
openaire   +1 more source

Tropical forest temperature thresholds for gross primary productivity [PDF]

Ecosphere, 2018
AbstractTropical forests are hyper‐diverse and perform critical functions that regulate global climate, yet they are also threatened by rising temperatures. Canopy temperatures depart considerably from air temperatures, sometimes by as much as air temperatures are projected to increase by the end of this century; however, canopy temperatures are rarely
Stephanie Pau, Matteo Detto, Youngil Kim, Christopher J. Still   +3 more
openaire   +1 more source

A methodology for parameter estimation in seaweed productivity modelling [PDF]

, 1993
This paper presents a combined approach for parameter estimation in models of primary production. The focus is on gross primary production and nutrient assimilation by seaweeds.
A Rable, BA Macler, BH Brinkhuis, FI Dromgoole, FI Dromgoole, HO Pires, JG Ferreira, KE Arnold, KH Mann, KM Khailov, M Torres, MM Littler, MS Murthy, R Margalef, R Santos, RA Melo, RA Vollenweider, RG Wiegert, RJ Búesa, RM Fujita, S Fredriksen, TR Parsons   +21 more
core   +1 more source

Structural Uncertainty in Model-Simulated Trends of Global Gross Primary Production

Remote Sensing, 2013
Projected changes in the frequency and severity of droughts as a result of increase in greenhouse gases have a significant impact on the role of vegetation in regulating the global carbon cycle. Drought effect on vegetation Gross Primary Production (GPP)
Zaichun Zhu, Jun Xiong, Sangram Ganguly, Cristina Milesi, Weile Wang, Hirofumi Hashimoto, Ramakrishna R. Nemani   +6 more
doaj   +1 more source

A Broadband Green-Red Vegetation Index for Monitoring Gross Primary Production Phenology

Journal of Remote Sensing, 2022
The chlorophyll/carotenoid index (CCI) is increasingly used for remotely tracking the phenology of photosynthesis. However, CCI is restricted to few satellites incorporating the 531 nm band.
Gaofei Yin, Aleixandre Verger, Adrià Descals, Iolanda Filella, Josep Peñuelas   +4 more
doaj   +1 more source

Predicting the effects of climate change on water yield and forest production in the northeastern United States [PDF]

, 1995
Rapid and simultaneous changes in temperature, precipitation and the atmospheric concentration of CO2 are predicted to occur over the next century. Simple, well-validated models of ecosystem function are required to predict the effects of these changes ...
Aber, John D, Federer, C. Anthony, Goulden, Michael L, Kicklighter, David W, Lathrop, Richard G Jr, Melillo, Jerry M, Ollinger, Scott V, Reich, Peter B   +7 more
core   +2 more sources

Large historical growth in global terrestrial gross primary production

Nature, 2017
Growth in terrestrial gross primary production (GPP)-the amount of carbon dioxide that is 'fixed' into organic material through the photosynthesis of land plants-may provide a negative feedback for climate change. It remains uncertain, however, to what extent biogeochemical processes can suppress global GPP growth. As a consequence, modelling estimates
Campbell, J. E., Berry, J. A., Seibt, U., Smith, S. J., Montzka, S. A., Launois, Thomas, Belviso, Sauveur, Bopp, Laurent, Laine, M.   +8 more
openaire   +4 more sources

The newfound relationship between extrachromosomal DNAs and excised signal circles

FEBS Letters, EarlyView.
Extrachromosomal DNAs (ecDNAs) contribute to the progression of many human cancers. In addition, circular DNA by‐products of V(D)J recombination, excised signal circles (ESCs), have roles in cancer progression but have largely been overlooked. In this Review, we explore the roles of ecDNAs and ESCs in cancer development, and highlight why these ...
Dylan Casey, Zeqian Gao, Joan Boyes
wiley   +1 more source

What’s the matter in phytoplankton? Highlighting the importance of stoichiometric traits in lake ecosystem models

Frontiers in Ecology and Evolution
IntroductionAccurate models of lake primary production are crucial for understanding ecosystem function and predicting ecosystem responses to global change. However, current research in lake ecosystem modeling has emphasized environmental characteristics
Carly R. Olson, Daniel Gschwentner, Annemieke M. Drost, Annemieke M. Drost, Joseph Mohan, Helena C. L. Klip   +5 more
doaj   +1 more source

Identification of a general light use efficiency model for gross primary production [PDF]

Biogeosciences, 2011
Non-stationary and non-linear dynamic time series analysis tools are applied to multi-annual eddy covariance and micrometeorological data from 44 FLUXNET sites to derive a light use efficiency model for gross primary production on a daily basis.
J. E. Horn, K. Schulz
doaj   +1 more source