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COSMOS Soil Moisture and Water Vapor and Carbon Dioxide Fluxes

COSMOS Soil Moisture and Water Vapor and Carbon Dioxide Fluxes. Russell Scott. Savanna. Creosote Shrubland. Grassland. Grassland. Riparian Woodland. Riparian Grassland and Shrubland.

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COSMOS Soil Moisture and Water Vapor and Carbon Dioxide Fluxes

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  1. COSMOS Soil Moisture and Water Vapor and Carbon Dioxide Fluxes Russell Scott

  2. Savanna Creosote Shrubland Grassland Grassland Riparian Woodland Riparian Grassland and Shrubland SECA consists of an array of eddy covariance towers placed throughout southern Arizona to address a number of issues related the functioning of ecosystems in semiarid areas.

  3. Walnut Gulch Experimental Watershed

  4. How do interannualand intra-annual variations on precipitation affects H2O and CO2exchange in semiarid ecosystems Cosmos and TDR soil moisture Cosmos and ET Cosmos and CO2 flux

  5. Site Layout KN? TDR profiles, Watershed Flume Cosmos, Metflux, Phenocam

  6. Flux sites

  7. From TDR profiles B horizon clays inhibit deep infiltration

  8. Evaporation 7 mm runoff Faster decay when plants inactive slower decay when plants active

  9. Active plants

  10. Carbon dioxide flux release uptake

  11. Ecosystem respiration and photosynthesis

  12. These thresholds are really important for modeling but more information relative to shallow or deep moisture is critical

  13. Soil respiration R2=0.68

  14. Conclusions • Good news • Cosmos provides soil moisture at a spatial resolution commensurate with EC fluxes • Preliminary comparisons show that Cosmos data is highly complementary to understanding water and CO2 fluxes • Needs • Effective depth seems too deep • Modeled disaggregated products needed (very shallow and deep soil moisture) from assimilation of COSMOS data into soil moisture models

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