Presentation on theme: "Mesoclimate of the LBA-ECO Santarem Study Area David Fitzjarrald Ricardo Sakai Osvaldo Moraes Matt Czikowsky Otavio Acevedo Raimundo Cosme de Oliveira."— Presentation transcript:
Mesoclimate of the LBA-ECO Santarem Study Area David Fitzjarrald Ricardo Sakai Osvaldo Moraes Matt Czikowsky Otavio Acevedo Raimundo Cosme de Oliveira Junior CD-03 University at Albany, SUNY Universidade Federal de Santa Maria EMBRAPA Amazonia Oriental
LBA-ECO weather station network Resurrected at the behest of the LBA Science Team (Miami meeting). Motivation: Determine regional biases/seasonal differences (develop a methodology to determine context in which flux observations are made.) * Study the physical basis for the river breeze identify mesoclimatic variabilities: Cloudiness (incident solar radiation) *Temperature/Humidity * Precipitation *gasp) support model studies… *Accommodate the few remaining literalists who use real (vs. reanalysis) data
LBA-ECO STM site special features… Large seasonal variation High correlation precipitation/ENSO signal World class amplitude semidiurnal atm P tide Strong influence river breeze/easterly interaction
Recent years in the LBA-ECO STM region: P bel P bel - P stm T stm U stm S O index Precipitacao CIRSAN
q sat Intraannual variability small but important… C p T L q RH smaller
This presentation from now on: Focus on diurnal variability ( & seasonal) Other (continuing) work Identify inland penetration of River breeze; frequency of occurrence; Gauge seasonal/interannual varibility; Minimize biases in standard climate data. Identify local wind circulations (e.g., Acevedo et al. presentation yesterday.)
Silva Dias et al., 2003 Cloudiness delineates the river….
River breeze mesoscale pressure gradient can extract from station data; looks like model simulation results(Silva Dias et al., 2003)
River-inland differences : 2 C temperature bias 20% cloud reduction in Kdn Still searching for the precipitation signal River breeze expressed actively for slack easterly cases. Cloud base determined by thermodynamics in cleared areas. Nocturnal winds appreciable only along river (a counter-current nocturnal river of air) River convective day and night.