CO 2 fluxes following simulated monsoon rain events

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CO 2 fluxes following simulated monsoon rain events. Rene Aguilera Mentor: Shirley Kurc, University of Arizona August 16 th , 2007 Sevilleta LTER - REU Symposium. Photo Credit: Doug Moore. How do ecosystems respond to changes in precipitation patterns?. Photo Credit: Greg Greene. - PowerPoint PPT Presentation

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<ul><li><p>CO2 fluxes following simulated monsoon rain eventsRene AguileraMentor: Shirley Kurc, University of Arizona</p><p>August 16th, 2007Sevilleta LTER - REU Symposium</p><p>Photo Credit: Doug Moore</p></li><li><p>How do ecosystems respond to changes in precipitation patterns? Photo Credit: Greg Greene</p></li><li><p>Monsoon Rainfall Manipulation Experiment (MRME): Water addition alters size and frequency of rainstorms during the summer monsoon (July Sept) at the black grama grassland.Treatment 1: Ambient rainfall onlyControl</p><p>Treatment 2: One 5 mm storm each weekSmall</p><p>Treatment 3: One 20 mm storm each monthLargeSame amount of water addition, different timing!</p></li><li><p>Hypothesis 1: In the first day or two following all rainfall events, CO2 will be released, followed by a period of lagged CO2 uptake (Potts et al. 2006, Huxman et al. 2004)Hypothesis 2: Over the course of the monsoon season, there will be less CO2 response following the treatment of more frequent small storms than infrequent large storms. (Spoonseller 2007).</p></li><li><p>How do I measure CO2 flux? Whole plant chamberLicor-7500~ 380 ppmEither soil is releasing carbon (respiration) or plants are taking up carbon (sequestration), so that concentration in chamber will become higher or lower than ambient.</p></li><li><p>Licor-7500 sensor head Flags outline measured areaFanTripod to mount sensor head</p></li><li><p>Apply chamberWater increases as plants transpireRemove ChamberExample of How Water Bends</p></li><li><p>Water increases as plants transpireWater flux is the slope of this line!Example of How Water Bends</p></li><li><p>Example of How Carbon Dioxide Bends</p><p>0710-000</p><p>Relative TimeTemperaturePressureAux InputCO2 AbsorptanceCO2 mmol/m3CO2 mg/m3CO2 umol/molH2O AbsorptanceH2O mmol/m3H2O g/m3H2O mmol/molH2O(C)Cooler Voltage</p><p>0.0426.1183.9200.071913.3585.1394.260.0532406.17.30912.047.071.62</p><p>0.9926.1183.9800.071313.3585.2394.060.0528406.47.31512.047.081.62</p><p>1.9226.1183.9500.071113.32585.9394.660.0531406.77.32112.057.091.62</p><p>326.1183.9400.072213.31585.6394.470.0533406.87.32312.067.091.62</p><p>3.9826.1383.9700.071613.3585.3394.180.0534406.47.31412.047.081.62</p><p>4.9126.1383.9500.072113.29584.8393.920.0536406.37.31412.047.081.62</p><p>5.9826.1183.9400.071113.3585.3394.30.0536406.77.32112.067.091.62</p><p>6.9126.1183.9400.072313.29584.6393.820.0535407.97.34312.097.131.62</p><p>7.9626.1183.9500.071313.29584.9393.960.0534407.47.33412.087.111.62</p><p>8.9626.1183.9200.071313.3585.1394.220.0536407.37.33212.087.111.62</p><p>9.9626.1383.9800.072113.3585393.940.0533407.37.33212.077.111.62</p><p>10.9826.1183.9500.071413.29584.6393.80.05354077.32612.067.11.62</p><p>11.9726.1383.9500.07213.29584.8393.970.0539407.37.33212.077.111.62</p><p>12.926.1383.9400.071713.29584.8393.970.0531407.17.32812.077.11.62</p><p>13.9726.1383.9400.071413.29584.9394.010.0536407.97.34212.097.131.62</p><p>14.9126.1183.9400.07113.3585.1394.130.0535408.77.35712.117.161.62</p><p>15.8926.1183.9400.072413.29584.8393.910.0542408.57.35212.117.151.62</p><p>16.9126.1183.9400.07113.29584.7393.880.0532408.17.34512.097.141.62</p><p>17.9326.1183.9400.072113.3585.1394.120.0536407.77.33812.087.121.62</p><p>18.9626.1183.9500.071713.3585394.080.0538409.77.37512.147.21.62</p><p>19.9126.1183.9400.072413.29584.9393.980.0543408.67.35412.117.161.62</p><p>20.9626.1183.9500.071613.29584.7393.880.0541409.17.36412.127.171.62</p><p>21.9126.1183.9500.071613.29584.7393.880.0537408.27.34812.17.141.62</p><p>22.8926.1183.9400.071613.29585394.050.0533408.87.35912.127.171.62</p><p>23.9626.1183.9400.072313.31585.5394.380.0534408.97.35912.127.171.62</p><p>24.9326.1183.9500.071413.29584.7393.860.0532408.47.35112.17.151.62</p><p>25.9126.0983.9500.071713.28584.3393.570.0538407.97.34312.097.131.62</p><p>26.9626.1383.9500.071713.29584.7393.90.0539408.47.35112.117.151.62</p><p>27.9826.1183.9500.072513.3585.3394.260.0542408.87.35812.127.161.62</p><p>28.9826.1183.9400.072113.3585.2394.180.0537409.47.36812.137.181.62</p><p>29.9226.1183.9500.071813.3585.2394.190.0537409.37.36712.137.181.62</p><p>30.8826.1183.9500.072213.3585.1394.120.0534408.87.35812.127.161.62</p><p>31.9726.1383.9400.071913.3585.1394.180.0542408.17.34612.17.141.62</p><p>32.9326.1583.9400.07113.3585.3394.290.0537408.97.3612.127.171.63</p><p>33.9626.1183.9500.071513.3585394.090.0537408.87.35812.127.161.62</p><p>34.9126.1383.9200.071713.3585.3394.390.0534409.87.37612.157.21.62</p><p>35.8826.1383.9400.072213.29584.8393.930.0537409.37.36712.137.181.62</p><p>36.9726.1183.9500.071713.32586.1394.80.054409.67.37312.147.191.62</p><p>37.926.1583.9500.071113.3585.4394.360.0538409.77.37512.157.21.62</p><p>38.9626.1383.9400.07113.3585.3394.330.05384097.36212.127.171.62</p><p>39.9626.1383.9700.071813.3585.2394.130.05424097.36212.127.171.62</p><p>40.8926.138400.071113.3585.4394.10.05364097.36112.117.171.62</p><p>41.9726.1583.9500.07213.31585.6394.510.0535409.87.37612.157.21.62</p><p>42.9726.1183.9500.071413.3585394.080.0536408.67.35612.117.161.62</p><p>43.9626.1383.9500.072213.3585.2394.230.0541409.17.36412.137.181.62</p><p>44.9126.1383.9500.071213.31585.4394.370.0534409.17.36312.127.171.62</p><p>45.9826.1183.9400.071513.29584.6393.810.0531409.37.36812.137.181.62</p><p>46.9626.1583.9800.071813.29584.7393.750.0538408.87.35812.117.161.62</p><p>47.9626.1383.9500.071613.29584.93940.0534409.27.36612.137.181.62</p><p>48.9126.1383.9500.071113.28584.2393.550.0538409.27.36512.137.181.62</p><p>49.9226.1283.9500.072513.29585394.050.0537409.67.37412.147.191.62</p><p>50.9826.1383.9500.070913.29584.9393.990.05354097.36212.127.171.62</p><p>51.9926.1183.9400.071613.31585.5394.430.0532409.67.37312.147.191.62</p><p>52.9926.1583.9400.072313.29585394.110.0536409.57.37212.147.191.62</p><p>53.926.1283.9400.072113.29584.7393.880.05354097.36112.127.171.62</p><p>54.9126.1183.9400.071513.29584.8393.920.0537409.37.36812.137.181.62</p><p>55.8926.1383.9200.071913.3585.3394.420.0539408.67.35412.117.161.62</p><p>56.9826.1583.9200.07113.3585.2394.340.0533409.57.37212.147.191.62</p><p>57.9626.1583.9500.072613.29584.93940.0542409.37.36712.137.181.62</p><p>58.9226.1383.9500.07113.3585394.10.0535410.27.38312.167.211.62</p><p>59.9926.1383.9200.072313.3585.1394.270.0536409.67.37312.147.191.62</p><p>60.9926.1383.9500.071413.3585.4394.310.0536409.37.36812.137.181.62</p><p>61.9626.1383.9500.072213.3585.4394.320.0537409.57.37212.147.191.62</p><p>62.9626.1583.9500.072413.31585.6394.50.0542409.77.37412.147.21.62</p><p>63.9126.1183.9500.072613.31585.8394.590.0541410.27.38312.167.211.62</p><p>64.9226.1283.9200.072613.31585.5394.540.0538410.97.39612.187.241.62</p><p>65.9126.1383.9400.072213.3585.3394.270.0536410.37.38512.167.221.62</p><p>66.9326.1583.9400.071313.31585.5394.440.0542409.77.37512.147.21.62</p><p>67.9326.1583.9500.071213.3585.1394.20.0537409.57.3712.147.191.62</p><p>68.8926.1283.9500.07213.32585.9394.680.0534409.87.37612.147.21.62</p><p>69.9626.1383.9500.071713.28584.4393.70.0539410.37.38612.167.221.62</p><p>70.9126.1483.9500.071613.32586.3394.950.0533409.87.37712.157.21.62</p><p>71.9626.1583.9400.072313.3585.2394.220.0537410.37.38612.167.221.62</p><p>72.9226.1583.9500.071613.28584.2393.570.0537409.47.36912.137.191.62</p><p>73.8926.1483.9200.071613.31585.5394.570.0537409.57.37212.147.191.62</p><p>74.9726.1783.9400.071413.33586.3395.040.0536411.47.40512.27.261.62</p><p>75.9826.1583.9500.071413.32585.9394.70.0536411.37.40412.197.261.62</p><p>76.9626.1583.9400.071913.33586.6395.210.0542410.87.39412.187.241.62</p><p>77.9626.1583.9400.071513.3585.1394.210.0531410.37.38512.167.221.62</p><p>78.926.1583.9500.071313.3585.3394.310.0537409.47.36912.147.191.62</p><p>79.9826.1583.9500.071613.31585.6394.510.054409.67.37312.147.21.62</p><p>80.9226.1583.9500.071513.29584.6393.830.0534410.27.38412.167.221.62</p><p>81.9926.1583.9500.071613.3585.2394.230.0531410.27.38412.167.221.62</p><p>82.9326.1583.9400.071113.3585.1394.180.0539410.67.39112.177.231.62</p><p>83.8826.1683.9500.072413.29585394.110.0536411.57.40712.27.261.62</p><p>84.9626.1583.9200.071213.31585.4394.520.0537409.57.37212.147.191.62</p><p>85.9626.1483.9400.072113.29584.6393.860.05374107.3812.157.211.62</p><p>86.9726.1583.9200.071913.3585.1394.30.054411.67.40812.27.261.62</p><p>87.9726.1583.9400.071813.32586394.820.05384117.39912.187.251.62</p><p>88.9626.1583.9500.071313.3585394.090.0537411.27.40112.197.251.62</p><p>89.9326.1683.9400.07213.31585.5394.470.0543410.47.38712.177.221.62</p><p>90.9626.1683.9700.072713.3585.2394.180.0538410.97.39612.187.241.62</p><p>91.9126.1683.9500.071513.29584.8393.970.0544410.97.39712.187.241.62</p><p>92.9726.1683.9400.072613.29584.7393.960.0537410.37.38612.167.221.62</p><p>93.8926.1683.9500.071213.32586.2394.920.0544410.77.39312.187.241.62</p><p>94.9326.1683.9500.07113.32586.3394.990.0542410.67.39112.177.231.62</p><p>95.9226.1683.9500.071613.32586.1394.830.0543410.97.39612.187.241.62</p><p>96.8926.1683.9400.071713.3585.3394.340.0534409.87.37612.157.21.62</p><p>97.9226.1683.9200.071613.33586.7395.390.0536410.87.39512.187.241.62</p><p>98.9826.1983.9500.071813.33586.4395.070.0539411.17.412.197.251.62</p><p>99.9626.283.9200.071713.32585.9394.930.0539410.37.38612.177.221.62</p><p>100.9726.283.9100.071413.32586395.030.0538410.97.39612.197.241.62</p><p>101.9326.1883.9200.070913.31585.7394.760.0537410.77.39312.187.241.62</p><p>102.9826.283.9500.071213.32586394.870.054410.67.3912.177.231.62</p><p>103.9726.1883.9400.071913.32586.1394.920.0544410.57.38912.177.231.62</p><p>104.9826.1683.9400.071213.3585.4394.40.0534410.67.39112.177.231.62</p><p>105.9626.1883.9500.071213.31585.8394.660.0538410.57.38912.177.231.62</p><p>106.926.1683.9500.071713.32586.2394.910.0539411.27.40112.197.251.62</p><p>107.9726.1683.9500.071813.31585.9394.70.054410.97.39612.187.241.62</p><p>108.9626.1683.9400.072413.3585.4394.380.0535410.57.3912.177.231.62</p><p>109.9826.1683.9200.072413.31585.4394.560.0538411.77.4112.217.271.62</p><p>110.9826.1683.9500.071613.32586394.770.05434117.39812.187.251.62</p><p>112.4826.1683.9500.070813.32586394.770.05374127.41612.217.281.62</p><p>112.9826.1683.9500.071913.3585.1394.220.0533411.47.40512.197.261.62</p><p>113.9226.1883.9400.070913.33586.3395.060.0539410.47.38712.177.221.62</p><p>114.9226.1883.9200.070913.33586.6395.380.0537410.87.39412.187.241.62</p><p>115.9826.1883.9400.071513.31585.5394.530.05344117.39712.187.241.62</p><p>116.8926.1883.9500.072413.29584.9394.080.054411.27.40212.197.251.62</p><p>117.9826.283.9400.071313.29585394.180.0536410.37.38612.177.221.62</p><p>118.9226.1883.9500.072113.31585.7394.630.05384127.41612.217.281.62</p><p>119.9626.1883.9400.071213.3585.4394.40.0538411.37.40312.197.251.62</p><p>120.926.1883.9400.071913.31585.5394.520.0538411.97.41512.217.281.62</p><p>121.9126.1883.9500.071513.31585.5394.50.0538411.47.40412.197.261.62</p><p>12326.1883.9200.071913.33586.3395.180.0539411.57.40712.27.261.62</p><p>123.9826.283.9200.07213.33586.6395.360.054411.37.40412.27.261.62</p><p>124.9226.283.9700.071913.31585.7394.520.0538411.27.40212.197.251.62</p><p>125.9826.2283.9200.071713.32586.2395.10.0534411.87.41212.217.271.62</p><p>12726.283.9500.071913.34587395.540.0538411.37.40312.197.261.62</p><p>127.9226.283.9200.072113.31585.8394.840.0538411.67.40912.217.271.62</p><p>12926.2283.9700.071613.3585394.10.054411.67.40912.27.271.62</p><p>129.9326.2283.9400.071713.3585394.210.0537411.57.40712.27.271.62</p><p>0710-300</p><p>Relative TimeTemperaturePressureAux InputCO2 AbsorptanceCO2 mmol/m3CO2 mg/m3CO2 umol/molH2O AbsorptanceH2O mmol/m3H2O g/m3H2O mmol/molH2O(C)Cooler Voltage</p><p>0.1926.4983.8700.073213.69602.3406.610.05434137.43412.277.331.58</p><p>1.2126.4983.8900.07413.7602.9406.880.0539411.67.40912.227.281.58</p><p>2.2226.5383.8700.073413.72603.8407.660.0539411.97.41412.247.291.58</p><p>3.2126.583.8900.073513.66601.2405.750.0539411.77.41112.237.291.58</p><p>4.2726.4983.900.073313.63599.7404.670.054412.47.42212.247.311.58</p><p>5.2126.4983.900.073313.69602.2406.410.0542412.47.42312.257.311.58</p><p>6.1926.4983.900.073913.7602.6406.660.0539412.67.42712.257.321.58</p><p>7.1826.4783.8700.07313.65600.8405.570.054414.27.45612.37.371.58</p><p>8.1826.4983.900.072813.63599.9404.80.0544137.43412.267.331.58</p><p>9.1826.5183.8700.073313.61599.1404.440.05414137.43412.277.331.58</p><p>10.1626.5183.8700.073113.64600.1405.130.0539413.47.4412.287.351.58</p><p>11.1726.5183.900.073713.61599404.280.0541413.77.44712.297.361.58</p><p>12.1826.583.8900.073113.61598.9404.210.0541413.67.44412.287.351.58</p><p>13.226.5183.8700.073213.61598.6404.150.0541413.97.44912.297.361.58</p><p>14.226.4983.8700.073113.57597.1403.120.0543413.57.44312.287.351.58</p><p>15.226.4983.900.073213.56596.5402.560.0539413.37.43912.277.341.58</p><p>16.1726.4983.8700.072913.58597.4403.280.0542413.87.44812.297.361.58</p><p>17.1826.4983.900.073313.55596.1402.240.0542413.77.44712.287.361.58</p><p>18.226.4983.900.073613.6598.3403.750.054414.57.4612.317.381.58</p><p>19.226.4983.8700.072813.61599.1404.430.0542414.77.46412.327.391.58</p><p>20.1726.4983.8700.072713.56596.5402.720.0541414.27.45612.37.371.58</p><p>21.1726.4983.8700.072613.59597.9403.670.0542414.47.45912.317.381.58</p><p>22.226.4983.900.072413.55596.4402.460.0542415.57.47912.347.421.58</p><p>23.1926.4983.8700.072813.55596.4402.590.0537414.37.45712.317.381.59</p><p>24.1826.4983.8700.072813.58597.5403.350.0543414.37.45712.317.381.58</p><p>25.1726.4983.8700.073113.57597.2403.160.0541415.47.47812.347.421.58</p><p>26.1726.4983.8700.072713.56596.5402.660.0541414.77.46512.327.391.58</p><p>27.1726.4783.8700.073313.53595.4401.940.0542415.47.47812.347.421.58</p><p>28.1726.4783.8900.072413.53595.3401.760.0543414.97.46812.327.41.58</p><p>29.226.4783.8700.072913.56596.5402.640.0543414.97.46912.327.41.58</p><p>30.1826.4783.8700.072913.55596.4402.60.0542415.17.47112.337.41.58</p><p>31.1826.4783.900.07313.55596.1402.220.054415.47.47612.337.411.58</p><p>32.226.4783.900.073213.53595.2401.670.054415.67.4812.347.421.58</p><p>33.1726.583.8700.072913.54595.9402.30.054415.77.48312.357.431.58</p><p>34.1726.4783.900.072713.52594.7401.310.0541415.97.48612.357.431.58</p><p>35.1726.583.8700.073213.54595.9402.30.0545416.77.50112.387.461.58</p><p>36.226.5183.900.072413.55596402.230.0539416.47.49512.377.451.58</p><p>37.1726.4783.8700.072913.52595.1401.710.0542416.27.49112.367.441.58</p><p>38.1726.4783.8700.072613.53595.2401.810.0544416.47.49412.377.451.58</p><p>39.1826.4783.900.073113.53595.4401.820.0544416.37.49412.367.451.58</p><p>40.1826.583.8900.072913.53595.1401.660.0544416.77.50112.377.461.58</p><p>41.1726.583.900.073213.53595.5401.850.0544416.47.49412.367.451.58</p><p>42.1726.4783.900.072513.51594.4401.110.0544415.97.48612.357.431.58</p><p>43.226.4583.8900.07313.53595.2401.660.0543416.97.50512.387.471.58</p><p>44.1926.4583.900.07313.51594.4401.090.0543417.17.50812.387.471.58</p><p>45.1726.4583.8700.073213.52594.8401.490.05464177.50612.387.471.58</p><p>46.1826.4583.8700.07313.5594.1401.040.0543416.67.49812.377.461.58</p><p>47.1826.4583.8700.072313.48593.2400.380.0543416.17.4912.367.441.58</p><p>48.1726.4583.900.072413.48593400.150.0543416.97.50412.387.471.58</p><p>49.226.4583.8700.072113.47592.8400.160.0546416.97.50412.387.471.58</p><p>50.1726.4583.8700.072813.48593.3400.470.0544417.47.51212.47.481.58</p><p>51.1726.4783.8700.072113.47592.9400.210.0546417.77.51912.417.51.58</p><p>52.226.4783.8700.072413.46592.3399.790.0542416.57.49712.377.451.58</p><p>53.226.4783.8700.072213.46592.2399.790.0545417.27.5112.397.481.58</p><p>54.226.4783.8700.072513.47592.6400.070.0543417.57.51512.47.491.58</p><p>55.226.4583.8700.072713.48593.2400.40.0544417.77.51812.417.491.58</p><p>56.226.4583.8700.07213.46592.1399.670.0542416.47.49512.377.451.58</p><p>57.1726.4583.8700.072813.47592.8400.150.0543417.27.50912.397.481.58</p><p>58.1726.4583.8700.072713.46592.4399.90.0545416.87.50212.387.461.58</p><p>59.1726.4583.8700.071913.47592.7400.10.05454177.50712.397.471.58</p><p>60.2126.4583.8700.072313.48593.3400.490.0542417.37.51212.397.481.58</p><p>61.1826.4783.8700.072613.47592.8400.180.0545417.57.51512.47.491.58</p><p>62.1726.4583.8700.072513.44591.5399.240.054416.77.50112.387.461.58</p><p>63.226.4583.900.072213.44591.3399.010.0545417.57.51412.397.491.58</p><p>64.1726.4583.900.072213.45592399.460.0543416.77.50112.377.461.58</p><p>65.226.4583.8700.072513.46592.2399.760.0542417.77.51912.417.51.58</p><p>66.226.4583.8700.072413.46592.2399.720.0542417.97.52...</p></li></ul>

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