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Aircraft at WBI - Cessna 421B	Map of West Branch, Iowa

Inlet at WBI is on pilot’s front right window

WBI samples are collected over flat agricultural land near West Branch in east central Iowa. Flights are conducted over a tall communications tower that also houses air sampling equipment. Sample collection via aircraft began in September 2004, originally over Rawley, Iowa (RIA), approximately 90 km to the northwest of the current site. The aircraft sampling was relocated to WBI in January 2008 to coordinate with air sample collection and monitoring at the WBI tower. Flights are conducted by Jeff Smalley and Dr. Dirk Brom of Hap’s Air Service based in Ames, Iowa.

WBI Site Data

Figure 1: Annual Climatology is a compilation of all Carbon Dioxide (CO2) time series data that has been collected with the Mauna Loa (MLO) trend removed. The Historical profile includes every CO2 measurement (excluding flagged data) for each month, at each altitude and has been binned to get the monthly average.

Figure 2: Annual Climatology is a compilation of all Carbon Monoxide (CO) time series data that has been collected with the Mauna Loa (MLO) trend removed. The Historical profile includes every CO measurement (excluding flagged data) for each month, at each altitude and has been binned to get the monthly average.

Figure 3: Annual Climatology is a compilation of all Sulfur Hexafluoride (SF6) time series data that has been collected with the Mauna Loa (MLO) trend removed. The Historical profile includes every SF6 measurement (excluding flagged data) for each month, at each altitude and has been binned to get the monthly average.

Figure 4: Annual Climatology is a compilation of all Methane (CH4) time series data that has been collected with the Mauna Loa (MLO) trend removed. The Historical profile includes every CH4 measurement (excluding flagged data) for each month, at each altitude and has been binned to get the monthly average.

Figure 5: Annual Climatology is a compilation of all Nitrous Oxide (N2O) time series data that has been collected with the Mauna Loa (MLO) trend removed. The Historical profile includes every N2O measurement (excluding flagged data) for each month, at each altitude and has been binned to get the monthly average.