Lightning observations from the Space Shuttle

Motion pictures were taken at night from the space shuttle that show lightning discharges spreading horizontally at speeds of .00001 m/sec for distances over 60 km. Tape recordings were made of the accompanying optical pulses detected with a photocell optical system. The observations show that lightning is often a mesoscale phenomenon that conveys large amounts of electric charge and energy derived from an extensive cloud system into a cloud-to-ground discharge. Several video tape recordings of lightning discharges were obtained on shuttle flights since the termination of the NOSL program. The size and location of the lightning illuminated cloud images is now being analyzed, and comparisons are made with meteorological data concerning the cloud system obtained from the McIDAS

Thunderstorm observations from Space Shuttle

Results of the Nighttime/Daytime Optical Survey of Lightning (NOSL) experiments done on the STS-2 and STS-4 flights are covered. During these two flights of the Space Shuttle Columbia, the astronaut teams of J. Engle and R. Truly, and K. Mattingly II and H. Hartsfield took motion pictures of thunderstorms with a 16 mm cine camera. Film taken during daylight showed interesting thunderstorm cloud formations, where individual frames taken tens of seconds apart, when viewed as stereo pairs, provided information on the three-dimensional structure of the cloud systems. Film taken at night showed clouds illuminated by lightning with discharges that propagated horizontally at speeds of up to 10 to the 5th m/sec and extended for distances on the order of 60 km or more

Nighttime observations of thunderstorm electrical activity from a high altitude airplane

Nocturnal thunderstorms were observed from above and features of cloud structure and lightning which are not generally visible from the ground are discussed. Most, lightning activity seems to be associated with clouds with strong convective cauliflower tops. In both of the storms lightning channels were visible in the clear air above the cloud. It is shown that substances produced by thunderstorm electrical discharges can be introduced directly into the stratosphere. The cause and nature of the discharges above the cloud are not clear. They may be produced by accumulations of space charge in the clear air above the cloud. The discharges may arise solely because of the intense electric fields produced by charges within the cloud. In the latter case the ions introduced by these discharges will increase the electrical conductivity of the air above the cloud and increase the conduction current that flows from the cloud to the electrosphere. More quantitative data at higher resolution may show significant spectral differences between cloud to ground and intracloud strokes. It is shown that electric field change data taken with an electric field change meter mounted in an airplane provide data on lightning discharges from above that are quite similar to those obtained from the ground in the past. The optical signals from dart leaders, from return strokes, and from continuing currents are recognizable, can be used to provide information on the fine structure of lightning, and can be used to distinguish between cloud to ground and intracloud flashes

A Prototype National Drought Alert Strategic Information System for Australia

Defining and categorizing drought in a quantitative and scientific manner are important national issues for Australian state and Commonwealth governments, landholders, and agribusiness. The challenge for modelers of Australia’s grasslands is to integrate biological models, geographic information systems (GIS), satellite imagery, economics, climatology, and visual high-performance computing into an Internet-deliverable application that can provide easily understood monitoring and prediction advice in near real-time— a national drought alert strategic information system. Although NOAA satellite-derived imagery has been somewhat useful in the broad-scale spatial assessment of green cover, especially the spatial response of vegetation to rainfall events (Smith, 1994; Dudgeon et al., 1990; Filet et al., 1990), it has inherent limitations in providing a total solution for drought and rangeland monitoring; biomass relationships are not good, tree cover confounds the signal, and a future projection of the current situation is not inherent. Also, the interpretation of the imagery does not usually consider the effects of soil type, vegetation structure, or rangeland “condition.” Similarly, rainfall analyses alone do not necessarily reflect the quantity and quality of pasture available on the ground. In the recent 1991–95 record-breaking drought in Queensland, rainfall analyses did not map the drought-declared southwestern areas of the state as droughted, and, conversely, coastal areas of the state were classed as droughted by rainfall analyses, when there was no community push for their declaration. Measures of rainfall effectiveness expressed as measures of plant biomass are required for drought definition. Improved assessments of the quantity and quality of biomass are needed, as well as consideration of herbivore densities and future climatic scenarios

EARTH University (Costa Rica)

EARTH is a private nonprofit international university located in the town of Guácimo in the province of Limón, a lowland region in the east of Costa Rica. EARTH derives its acronym from the Spanish title Escuela de Agricultura de la Región Tropical Húmeda (Agricultural School of the Humid Tropical Region). The W. K. Kellogg Foundation, the U.S. Agency for International Development, and the Costa Rican government worked with other national and international agencies to create this unique university in the mid-1980s. The higher education initiative emerged from recognition that unsustainable agricultural practices were damaging and straining soil, water, forest, biological, and other natural resources across Central America

SITE-SPECIFIC VERSUS WHOLE-FIELD FERTILITY AND LIME MANAGEMENT IN MICHIGAN SOYBEANS AND CORN

Prior research into variable-rate application (VRA) of fertilizer nutrients has found profitability to be lacking in single nutrient applications to U.S. cereal crops. This study examines the yield and cost effects of VRA phosphorus, potassium and lime application on Michigan corn and soybean farm fields in 1998-2001. After four years, we found no yield gain from site-specific management, but statistically significant added costs, resulting in no gain in profitability. Contrary to results elsewhere, there was no evidence of enhanced spatial yield stability due to site-specific fertility management. Likewise, there was no evidence of decreased variability of phosphorus, potassium or lime after VRA treatment. Site-specific response functions and yield goals might also enhance the likelihood of profitable VRA in the future.Crop Production/Industries,

Struggling With Article 101(3) Tfeu: Diverging Approaches Of The Commission, Eu Courts, And Five Competition Authorities

The decentralized enforcement regime of EU competition law is based on the assumption that the obligation to apply the same Treaty provisions is sufficient to ensure a uniform administration of the law. This paper questions this assumption. Based on a systematic analysis of a large database of cases, it presents empirical evidence indicating that the Commission, EU courts and five national competition authorities have followed very different interpretations of the law when applying Article 101(3)TFEU. The paper uses the debate over the types of benefit that can be examined under Article 101(3) TFEU as an illustrative example of the struggle between the different competition authorities in shaping the future of EU competition policy

In search of a European economic imaginary of competition: fifty years of the Commission’s annual reports

The term ‘competition’ is a core notion for social and economic thinking and the organisation of markets. Nevertheless, this paper shows that there is no single acceptable economic imaginary ascribed to the notion in Europe. The search for the meaning of competition is an ongoing journey, from the EU’s very inception 60 years ago to the present day, which is inherently tied to the objectives, scope, and boundaries of EU (competition) law and to socio-economic transformations. The paper first reviews the history of the notion in both common-usage language and in legal-economic thinking. It exposes the emergence of three parallel, partly conflicting, imaginaries influencing the notion in EU competition law: Keynesian, ordoliberal, and neoliberal. After demonstrating that no single imaginary was adopted by EU primary, secondary, or soft laws, it applies Critical Discourse Analysis to the Commission’s annual reports on competition (1971–2020) in search for the meaning of competition. The paper reveals that the notion of competition had acquired one meaning in ‘hard’ contexts of the enforcement (scope of the prohibition of competition; exceptions or justifications for allowing otherwise anti-competitive behaviour), and another meaning in ‘softer’ contexts (mandates of the competition rules, and to a lesser extent – selection of enforcement priorities). While the ‘hard’ contexts have experienced a transformation from Keynesian and ordoliberal imaginary of competition to a neoliberal notion; the ‘soft’ contexts still invoke a broader notion reflecting influences from all three theories. Finally, the paper argues that although the lack of a clear definition for competition undoubtedly raises challenges relating to the rule of law, legal certainty, and uniformity, its ambiguity also serves as a powerful tool in safeguarding the durability and legitimacy of competition as an economic imaginary. It allows tailoring the notion of competition to changing legal, economic, and social conditions without a Treaty amendment