Data Structures Through C In Depth By S K Srivastava Pdfl

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Lauro Beriault

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Jan 25, 2024, 3:08:11 PM1/25/24

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Freezing rain is a meteorological event that occurs during the winter months in parts of the United States and southern Canada. Freezing rain poses a serious threat to surface transportation and electric power transmission (e.g., Martner et al. 1993; Bendel and Paton 1981; Regan 1998). The synoptic conditions that produce freezing rain have been studied previously and are fairly well understood (e.g., Bernstein et al. 1998; Cortinas 2000). Freezing rain usually results from a layer of warm (T > 0C) air overriding a shallow layer of cold (T < 0C) air with subfreezing temperatures at the surface. Typically, snow falls into the warm layer of air and melts. When the melted snowflakes fall through the layer of subfreezing air just above the surface, they do not refreeze, but rather become supercooled. The drops freeze upon contact at the surface. The depth of the cold layer is critical in determining the precipitation type observed at the surface. If the depth of the cold layer is sufficiently deep, that is, >400 m, the supercooled drops may refreeze to become ice pellets (Zerr 1997; Cortinas 2000).

The data used in this research were collected during the STORM-FEST field project (Szoke et al. 1994). This project was coordinated and funded by several agencies. The field project focused on studying the dynamics and structure of fronts associated with winter storms and the resulting precipitation over the central United States. STORM-FEST was operational from 1 February through 15 March 1992. The study area of STORM-FEST covered several states in the central United States with most of the focus on Kansas, Missouri and Oklahoma. This study area can be seen in Fig. 1. Many facilities were used in the STORM-FEST domain including five research aircraft, six Doppler radars complementing eight National Weather Service (NWS) radars, numerous surface observing networks, as well as supplemental rawinsondes and rawinsonde sites. This extensive observing network provided an unparalleled dataset for mesoscale phenomena occurring in this region during winter storm events. A 4-h timeline of the data systems used in this case study is shown in Fig. 3. The Wyoming King Air landed at 0709 UTC and, therefore, does not appear in Fig. 3.