| Report Year: 2009 |
| Lake Iowa, Iowa County |
| Carbon Balance Table |
| Parameter | 7/21/2009 | 6/16/2009 | 2009 | 2008 | 2007 | 2006 | 2005 | 2004 | 2003 | 2002 | 2001 | 2000 |
| Alkalinity as CaCO3 (mg/L) | 101 | 114 | 107.5 | - | - | - | 98.5 | 117.8 | 74.0 | 93.2 | 82.7 | 151.0 |
| Dissolved Organic Carbon (mM) | 0.58 | 0.51 | 0.54 | - | - | - | 0.76 | 0.47 | 1.00 | 0.77 | - | - |
| Temperature (oC) | 22.6 | 21.2 | 21.9 | - | - | - | 25.4 | 23.2 | 25.0 | 26.6 | 22.9 | 26.2 |
| Specific Conductivity (μS/cm) | 240.0 | 270.0 | 255.00 | - | - | - | 272.29 | 321.15 | 256.80 | 364.49 | 235.05 | 236.44 |
| pH | 8.5 | 8.3 | 8.4 | - | - | - | 9.5 | 8.5 | 8.7 | 8.9 | 9.1 | 8.9 |
| I (Ionic Strength ?) | 0.0420 | 0.0473 | 0.0446 | - | - | - | 0.0477 | 0.0562 | 0.0450 | 0.0638 | 0.0411 | 0.0414 |
| Dissolved Inorganic Carbon (mM) | 1.98 | 2.25 | 2.12 | - | - | - | 1.54 | 2.28 | 1.39 | 1.72 | 1.48 | 2.83 |
| pCO2 (μatm) | 318 | 497 | 407.6 | - | - | - | 24.8 | 418.9 | 146.7 | 122.2 | 54.5 | 233.1 |
| Equilibrium CO2 | 13.58 | 14.14 | 13.86 | - | - | - | 12.54 | 13.35 | 13.59 | 12.16 | 13.56 | 12.24 |
| CO2 (μM) | 11.68 | 18.98 | 15.33 | - | - | - | 0.88 | 14.77 | 5.15 | 4.02 | 2.03 | 7.90 |
| Δ CO2 from Equilibrium | -1.891 | 4.841 | 1.47 | - | - | - | -11.66 | 1.42 | -8.43 | -8.13 | -11.53 | -4.34 |
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