Seasonal and spatial variation in the stable isotopic composition (δ18O and δD) of precipitation in south Florida

Precipitation data collected from five sites in south Florida indicate a strong seasonal and spatial variation in δ18O and δD, despite the relatively limited geographic coverage and low-lying elevation of each of the collection sites. Based upon the weighted-mean stable isotope values, the sites were classified as coastal Atlantic, inland, and lower Florida Keys. The coastal Atlantic sites had weighted-mean values of δ18O and δD of −2.86‰ and −12.8‰, respectively, and exhibited a seasonal variation with lower δ18O and δD values in the summer wet-season precipitation (δ18O = −3.38‰, δD = −16.5‰) as compared to the winter-time precipitation (δ18O = −1.66‰, δD = −3.2‰). The inland site was characterized as having the highest d-excess value (+13.3‰), signifying a contribution of evaporated Everglades surface water to the local atmospheric moisture. In spite of its lower latitude, the lower Keys site located at Long Key had the lowest weighted-mean stable isotope values (δ18O = −3.64‰, δD = −20.2‰) as well as the lowest d-excess value of (+8.8‰). The lower δD and δ18O values observed at the Long Key site reflect the combined effects of oceanic vapor source, fractionation due to local precipitation, and slower equilibration of the larger raindrops nucleated by a maritime aerosol. Very low δ18O and δD values (δ18O < −6‰, δD < −40‰) were observed just prior to the passage of hurricanes from the Gulf of Mexico as well as during cold fronts from the north-west. These results suggest that an oceanic vapor source region to the west, may be responsible for the extremely low δD and δ18O values observed during some tropical storms and cold fronts.

The Tax Reform Act of 1986: Impact On Hospitality Industries

In her discussion - The Tax Reform Act Of 1986: Impact On Hospitality Industries - by Elisa S. Moncarz, Associate Professor, the School of Hospitality Management at Florida International University, Professor Moncarz initially states: “After nearly two years of considering the overhaul of the federal tax system, Congress enacted the Tax Reform Act of 1986. The impact of this legislation is expected to affect virtually all individuals and businesses associated with the hospitality industry. This article discusses some of the major provisions of the tax bill, emphasizing those relating to the hospitality service industries and contrasting relevant provisions with prior law on their positive and negative effects to the industry. “On October 22, 1986, President Reagan signed the Tax Reform Act of 1986 (TRA 86) with changes so pervasive that a recodification of the income tax laws became necessary…,” Professor Moncarz says in providing a basic history of the bill. Two, very important paragraphs underpin TRA 86, and this article. They should not be under-estimated. The author wants you to know: “With the passage of TRA 86, the Reagan administration achieved the most important single domestic initiative of Reagan's second term, a complete restructuring of the federal tax system in an attempt to re-establish fairness in the tax code…,” an informed view, indeed. “These changes will result in an estimated shift of over $100 billion of the tax burden from individuals to corporations over the next five years [as of this article],” Professor Moncarz enlightens. “…TRA 86 embraces a conversion to the view that lowering tax rates and eliminating or restricting tax preferences (i.e., loopholes) “would be more economically and socially productive.” Hence, economic decisions would be based on economic efficiency as opposed to tax effect,” the author asserts. “…both Congress and the administration recognized from its inception that the reform of the tax code must satisfy three basic goals,” and these goals are identified for you. Professor Moncarz outlines the positive impact TRA 86 will have on the U.S. economy in general, but also makes distinctions the ‘Act will have on specific segments of the business community, with a particular eye toward the hospitality industry and food-service in particular. Professor Moncarz also provides graphs to illustrate the comparative tax indexes of select companies, encompassing the years 1883-through-1985. Deductibility and its importance are discussed as well. The author foresees Limited Partnerships, employment, and even new hotel construction and/or rehabilitation being affected by TRA 86. The article, as one would assume from this type of discussion, is liberally peppered with facts and figures.