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ARC Railroad Valley 2011. Provide data to support calibration of GOSAT Explore local sources of CO 2 and methane Demonstrate greenhouse gas vertical profile measurement capability from Alpha Jet Demonstrate flux measurements from SIERRA. SIERRA Team: Surveys of CO 2 , CH 4 , 3-D winds

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arc railroad valley 2011
ARC Railroad Valley 2011
  • Provide data to support calibration of GOSAT
  • Explore local sources of CO2 and methane
  • Demonstrate greenhouse gas vertical profile measurement capability from Alpha Jet
  • Demonstrate flux measurements from SIERRA
  • SIERRA Team:
    • Surveys of CO2, CH4, 3-D winds
    • CO2 Vertical profiles
  • Ground-based Teams:
    • Ambient CO2, CH4, 3-D winds
    • Soil properties, gas samples, microbiology
  • Alpha Jet Team:
    • CO2, CH4, H2O, O3 Vertical profiles and transits to/from ARC
co 2 ch 4 data sets
CO2, CH4 Data Sets
  • Ground-based
    • mid-day at base camp under GOSAT overpasses: June 19, 20, 22, 23, 25, 26
    • diurnal cycles
    • mobile sleuthing
  • SIERRA
    • June 17: CH4 playa survey
    • June 18: CH4 at springs and oil wells
    • June 20*: CO2 stacked circles at base camp
    • June 21*: CH4 oil well mapping
    • June 22: CO2 stacked circles at base camp
    • (*MMS data also available)
  • Alpha Jet
    • vertical profiles under GOSAT
      • June 22, 23, 25, 26
sierra highlights
SIERRA Highlights

CO2 stacked circles

mapping methane over playa

mapping methane over springs

mapping methane over oil wells

diurnal variability
Diurnal Variability
  • CO2 at ground level
  • noon on 6/20 through noon on 6/21
  • drawdown overnight: uptake into soil
  • consistent with other desert environments; magnitude currently an open research question
soil and microbiology data
Soil and Microbiology Data

Ground truthing for methane hotspots

Kate Springs

Bubble characteristics:

CH4 = 84.32 ± 0.13 %

C2H6= 7.88 ± 0.16 ppm

C1/C2 = 105000

Sediment POC = 3.37 ± 0.8%

Kate Springs

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