On the Relationship between the Kinematic Characteristics of Wind in Tropical Cyclones and Gravity Anomalies

Abstract

The existence of relationships between the kinematic characteristics of wind (maximum velocity and its acceleration) in a tropical cyclone (TC) and the values of gravity anomalies (vertical and horizontal components, respectively, vertical components of gravity anomalies (VGAs) and horizontal components of the gravity anomalies (HGAs)) along the paths of movement of TCs is established. It is shown that the changes in VGA and wind velocity are in general close in antiphase and to a certain extent correlate qualitatively. An analysis of wind accelerations and the corresponding values of VGA has not revealed a clear correspondence in their comparison. Changes in HGA values are close to changes in wind velocity and correlate well at the qualitative level, except for the entry of a TC to dry land and the movement of a TC across a highly anomalous region. A comparison of changes in maximum velocity and acceleration of wind to changes in HGA values is performed for the first time.