Campaign : Water Vapor IOP
2000.09.18 - 2000.10.08
Lead Scientist : Henry Revercomb
Data Availability
Yes
For data sets, see below.
Description
Scientific hypothesis: 1. Microwave radiometer (MWR) observations of the 22 GHz water vapor line can accurately constrain the total column amount of water vapor (assuming a calibration accuracy of 0.5 degC or better, which translates into 0.35 mm PWV).
2. Continuous profiling by Raman lidar provides a stable reference for handling sampling problems and observes a fixed column directly above the site only requiring a single height- independent calibration factor.
3. Agreement between the salt-bath calibrated in-situ probes, chilled mirror hygrometers, DIAL, and MWR can be achieved. All of these techniques are considered capable of measuring water vapor with a high absolute accuracy. More details are given in the Science Plan.
Approach to test hypothesis: Operate the CART, ETL CSR, and JPL J-unit MWRs in continuous TIP-cal mode so that their calibration can constantly be monitored. Periodically, use a LN2 blackbody target on the MWRs to verify their calibration. Utilize the scanning capability of the NASA/GSFC Raman lidar to investigate the horizontal homogeneity of the sky during several periods when the MWRs are collecting TIP-cal data.
Operate the MPI DIAL, comparing it to the MWR-calibrated CART Raman lidar and tower-calibrated NASA/GSFC Raman lidar.
Launch dual-sondes (with the new RS-90s) to continue the characterization of the radiosondes performed during the first two WVIOPs.
GPS measurements at the CF and/or Lamont to provide a data set which can be compared and evaluated against the other measures of PWV.
Chilled mirrors at the surface and 60-m tower levels to demonstrate repeatability of the agreement between the chilled mirrors and the Vaisala in-situ probes at those levels shown in the 1997 WVIOP. More details are given in the Science Plan.
Other Contacts
Lead Scientist Coordinator: Dave Tobin Doug Sisterson, SGP CART Site Program Manager Marv Wesely, ARM SGP Instrument Team Leader Dave Turner, Data and Science Integration Team (DSIT) Contact
Campaign Data Sets
| Campaign Participant | Data Set | Archived Data |
|---|---|---|
| Boesenberg, Jens | DIAL Lidar | Order Data |
| Cimini, Domenico | MWR | Order Data |
| Gallagher, Frank | Dataplane | Order Data |
| Gutman, Seth | GPS | Order Data |
| Keihm, Stephen | JPL MWR | Order Data |
| Lesht, Barry | BBSS | Order Data |
| Morris, Victor | CART MWR | Order Data |
| Revercomb, Henry | AERIBAGO | Order Data |
| Schmid, Beat | Sunphotometer | Order Data |
| Turner, David | CART RL | Order Data |
| Westwater, Ed | ETL MWR | Order Data |
| Whiteman, David | GSFC RL | Order Data |
