Methods to homogenize wind speeds from ships and buoys
Abstract
Marine winds reported by Voluntary Observing Ships (VOS) and moored buoys require adjustment to provide a homogeneous record of the marine climate. Known sources of inhomogeneity arise from differences in measurement height and method, averaging method and atmospheric stability; methods are available to correct for these. However, significant differences remain in a paired dataset of ship and buoy winds. Regression methods to remove this remaining inconsistency are discussed, and a ranked regression method chosen as most appropriate to adjust ship wind speeds to yield a similar distribution. We show the factors, such as vessel type, that affect the regression results. The corrections, derived from a high-quality paired dataset with rigorous quality control, are effective at reducing inhomogeneity in monthly mean wind speed distributions derived from the International Comprehensive Ocean-Atmosphere Data Set.
- Publication:
-
International Journal of Climatology
- Pub Date:
- June 2005
- DOI:
- 10.1002/joc.1176
- Bibcode:
- 2005IJCli..25..979T
- Keywords:
-
- wind speed;
- buoy;
- VOS;
- bias;
- ranked regression