Water relations data excercise

Data from two summerdays from SMEAR II measurement station. Excel file includes: column 1. title: Time, description: time for the measurements of water vapor concentration, temperature and transpiration rate, unit: dd.mm.yyyy 00:00, source: timer column 2. title: Water vapor concentration in air (g/m3), description: water vapor concentration in air, unit: g/m3, source: eddy covariance column 3. title: Temperature (Ce), description: temperature of the time of measurements, unit: celcius, source: thermometer column 4. title: Transpiration rate (mg/m2s), description: transpiration rate of water from a 15 meter pine tree (expressed per needle area), unit: mg/m2, source: field measurement column 5: empty column 6. title: Time, description: time for the measurement of sap flow rate, unit: dd.mm.yyyy 00:00, source: timer column 7. title: Sap flow rate (mg/m2s), description: xylem sap flow rate at the tree base, unit: mg/m2s, source: field measurements