Tropical cyclone reconnaissance with the Global Hawk: operational thresholds and characteristics of convective systems over the tropical Western North Pacific
Damron, David W.
Harr, Patrick A.
MetadataShow full item record
In a tropical cyclone (TC), in situ observations measure storm location, intensity, and structure. These parameters are valuable for initializing numerical models and providing forecasters with current conditions on which to base their forecast. Over the western North Pacific (WPAC), a lack of in situ observations in TCs is hypothesized to be one component that contributes to a recent leveling of forecast skill. In this study, the use of a Global Hawk (GH) unmanned aerial vehicle as an observing platform for TCs over the WPAC is examined. It is hypothesized that the GH can greatly benefit the Department of Defense by reducing the uncertainty in TC track forecasts, which has been mandated by the U.S. Pacific Command as a priority for increasing the area of sea maneuverability A limit to successful GH operations is the ability to operate at altitudes above typical cloud tops of WPAC TCs. A climatology of WPAC TC cloud-top heights and temperatures was examined to relate these parameters to storm characteristics. It is concluded that use of a GH for tropical cyclone reconnaissance in the WPAC is a viable option to provide in situ observations of tropical cyclone characteristics for improved model and operational forecasts.
Approved for public release; distribution is unlimited.
Showing items related by title, author, creator and subject.
Harr, Patrick A.; Carr, L.E., III; Elsberry, Russell L. (1997-09-30);Globally, tropical cyclone characteristics such as activity, genesis location, and track types have been observed to vary over space and time scales that range from seasonal to that of an individual cyclone. Because of ...
Li, T.; Wang, B.; Chang, C.-P.; Zhang, Y. (2003);A conceptual coupled atmosphere-ocean model was constructed to understand the origin of the Indian Ocean Dipole Mode (IODM). In the model various positive and negative air-sea feedback processes were involved. Among them ...
Harr, Patrick A. (2001-09-30);The long-term goals are to understand how variabilities in the large-scale atmospheric environment and the internal tropical cyclone structure influence tropical cyclone track and intensity characteristics and define how ...