Data/hora: 21/06/2024 18:18:44

Biblioteca(s): | Embrapa Pantanal.
Data corrente: | 03/07/1997
Data da última atualização: | 31/03/2017
Autoria: | POTTER, C. S.; RANDERSON, J. T.; FIELD, C. B.; MATSON, P. A.; VITOUSEK, P. M.; MOONEY, H. A.; KLOOSTER, S. A.
Título: | Terrestrial ecosystem production: a process model based on global satellite and surface data.
Ano de publicação: | 1993
Fonte/Imprenta: | Global Biogeochemical Cycles, v.7, n.4, p.811-841, Dec. 1993.
Idioma: | Inglês
Conteúdo: | This paper presents a modeling approach aimed at seasonal resolution of global climatic and edaphic controls on patterns of terrestrial ecosystem production and soil microbial respiration. We use satellite imagery (Advanced Very High Resolution Radiometer and International Satellite Cloud Climatology Project Solar Radiation), along with historical climate (monthly temperature and pricipitation) and soil attributes (texture, C and N contents) from global (1) data sets as model inputs. The Carnegie-Ames-Stanford approach (CASA) Biosphere model runs on a monthly time interval to simulate seasonal patterns in net plan carbon fixation, biomass and nutrient allocation, litterfall, soil nitrogen mineralization, and microbial CO2 production. The model estimate of global terrestrial net primary production is 48 Pg C yr-1 with a maximum light use efficiency of 0.39 g C MJ-1 PAR. Over 70% of terrestrial net production takes place between 30 N and 30 S latitude. Steady state pools of standing litter represent global storage of around 174 Pg C (94 and 80 Pg C in nonwoody and woody pools, respectively), whereas the pool of soil C in the top 0.3 m that is turning over on decadal time scales comprises 300 Pg C. Seasonal variations in atmospheric CO2 concentrations from three stations in the Geophysical Monitoring for Climate Change Flask Sampling Network correlate significantly with estimated net ecosystem production values averaged over 50-80 N, 10-30 N, and 0-10 N.
Palavras-Chave: | Ecossistema terrestre; Global satellite; Modelling; Modelo; Primary production; Producao primaria; Terrestrial ecosystem.
Categoria do assunto: | --
Registro original: | Embrapa Pantanal (CPAP)
Exemplares: | CPAP - (34500-1) - ADC - SP - PP - SP15252 -  - 15252 - DIS