The 5th Conference on Polar Meteorology and Oceanography

4.2
ANALYSES OF LONG-TERM 10-METER WIND FIELDS OVER THE ARCTIC BASIN

Jennifer Francis, Rutgers University, New Brunswick, NJ; and A. Munchow and R. Cermak

A ten to twenty year data set of daily-average 10-meter wind velocities had been computed from the NASA/NOAA TOVS (TIROS Operational Vertical Sounder) Polar Pathfinder Data Set. The bulk boundary-layer stratification derived from TOVS temperature profiles is used to correct to the 10-meter level geostrophic winds computed from NCEP Reanalysis surface pressure fields. These winds are compared to observations from field experiments and coastal stations in the Arctic Basin and have an accuracy of approximately 10% in magnitude and 20 degrees in direction. We analyze these fields using EOFs to reveal mean spatial relationships, then relate them to previously identified patterns such as the North Atlantic Oscillation and the Arctic Oscillation. We also examine anomalies over the period of record to investigate temporal variability. Divergence of the winds is computed and compared to TOVS-derived surface temperature fields to relate lead formation to wind forcing. These analyses are in progress: results will be reported in the manuscript and at the meeting

The 5th Conference on Polar Meteorology and Oceanography