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3 edition of Some predicted climatic effects of a simulated Sahara lake found in the catalog.

Some predicted climatic effects of a simulated Sahara lake

R. Robert Rapp

Some predicted climatic effects of a simulated Sahara lake

by R. Robert Rapp

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Published by Rand in Santa Monica .
Written in English

    Subjects:
  • Climatic changes

  • Edition Notes

    Statement[by] R.R. Rapp and M. Warshaw. A report prepared for Defense Advanced Research Projects Agency.
    Series[Rand report] -- R-1415-ARPA, R (Rand Corporation) -- R-1415-ARPA.
    ContributionsWarshaw, Michael., United States. Defense Advanced Research Projects Agency.
    The Physical Object
    Paginationix, 31 p.
    Number of Pages31
    ID Numbers
    Open LibraryOL13571721M
    OCLC/WorldCa1345254

      They concluded that the climatic transition of the Sahara took place abruptly, within a possible span of about years. The Sahara Desert extends eastward from the Atlantic Ocean some 3, miles to the Nile River and the Red Sea, and southward from the Atlas Mountains of Morocco and the Mediterranean shores more than 1, miles to the. @article{osti_, title = {Sensitivity of climate models: Comparison of simulated and observed patterns for past climates. Progress report, February 1, Janu }, author = {Prell, W L and Webb, T III}, abstractNote = {Predicting the potential climatic effects of increased concentrations of atmospheric carbon dioxide requires the continuing development of climate models.

    to the effects of climate change, with rainfed agriculture accounting for approximately 96 % of overall crop pro-duction (World Bank a). The production of crops and livestock other than pigs in Sub-Saharan Africa is typically located in semiarid regions (Barrios et al. ). In Bots-. During the “Green Sahara” period (11, to years before the present), the Sahara desert received high amounts of rainfall, supporting diverse vegetation, permanent lakes, and human populations. Our knowledge of rainfall rates and the spatiotemporal extent of wet conditions has suffered from a lack of continuous sedimentary records. We present a quantitative reconstruction of western.

    The Good, The Bad and The Ugly Effects of Climate Change Posted on 17 August by gpwayne. This blog post is the Basic version (written by Graham Wayne) of the skeptic argument "Global warming is good". Here’s a list of cause and effect relationships, showing that most climate change impacts will confer few or no benefits, but may do great harm at considerable cost. Yet, this past climate change is difficult for secular scientists to explain. Some uniformitarian scientists claim the wet Green Sahara was caused by changes in Earth's orbital motions (the astronomical or Milankovitch theory of climate change), which caused a small increase in solar radiation some .


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Some predicted climatic effects of a simulated Sahara lake by R. Robert Rapp Download PDF EPUB FB2

Get this from a library. Some predicted climatic effects of a simulated Sahara lake. [R Robert Rapp; Michael Warshaw; Rand Corporation.; United States. Defense Advanced Research Projects Agency.]. Some Predicted Climatic Effects of a Simulated Sahara Lake.

Skip to page content; Objective Analysis. Some Predicted Climatic Effects of a Simulated Sahara Lake. by R. Robert Rapp, M The simulated lake is a relatively small perturbation to the earth's boundary condition and was chosen to test the hypothesis that an observable and Cited by: 1.

The predicted global dust emission at the LGM is times as large as the present-day value, which is the combined effect of the expansion of dust sources and the favorable meteorological parameters (MPs; e.g., the strong surface wind and the low air humidity) under the LGM climate.

Simulated global dust emission is Tg yr −1 with Cited by:   In this study, global solar radiation over Nigeria was simulated under an enhanced atmospheric CO 2 level using the International Centre for Theoretical Physics (ICTP) Regional Climate Model version 3 (RegCM3) for the period to with ECHAM5 GCM as the lateral boundary conditions.

The simulated seasonal global solar radiation bias for the RegCM3 with NIMET and Cited by:   Rapp, R. and M. Warshaw:Some Predicted Climatic Effects of a Simulated Saharan Lake, Rand Corporation, Santa Monica, California, 40 pp.

Google Scholar Research and Science News: Febru‘Inflation of Clouds Improves Rainmaking, Hebrew University Rain Research Discovers’, Hebrew University of Jerusalem, Jerusalem, by: 6.

personal conditions, and effects on their lives and livelihoods. The effects of climate change imply that the local climate variability that people have previously experienced and have adapted to is changing and changing at relatively great speed.

THE NEED FOR ADAPTATION The major impacts and threats of global warming are widespread (Figure. Large-scale climatic impacts affecting the entire Southeast region, are also predicted, such as El Niño-Southern Oscillation (ENSO) effects on river discharges in the Southeast, and related influences on the productivity of coastal ocean waters, exemplified here as follows using the Cape Fear River and the Savannah River, two major Coastal.

Climate change has footprints across the planet; however, certain regions are disproportionately affected. Africa is less responsible for the occurrence of anthropogenic climate change than any other continent (Fields ) but more vulnerable to its effects on account of its high population, low adaptive capacity, and multiple converging stressors (Busby et al.

; Fields ; Niang et al. Mega Chad was the biggest freshwater lake on earth coveringsq miles (, sq km) of Central Africa - and rapidly shrunk to a tiny fraction of its former size 1, years ago.

The Pebble Project in Alaska is one of the world’s largest undeveloped copper deposits. The Environmental Impact Statement (EIS) proposes a year open-pit extraction, sulfide flotation, and deposition of separated pyritic tailings and potentially acid-generating waste rock in the pit at closure.

The pit will require perpetual pump and treat management. We conducted geochemical and. Although some GCMs configured with a vegetated Sahara show rainfall anomalies close to the pollen reconstructions [Claussen and Gayler, ; Renssen et al., ; Pausata et al., ], three generations of climate models [Joussaume et al., ; Braconnot et al., ; Perez‐Sanz et al., ] fail to reproduce this transition [Harrison et.

Sahara - Sahara - Economy: During the century of colonial dominion over the Sahara, which lasted from the midth to the midth century, there was little fundamental change, except for military pacification; colonial powers were little interested in the economic development of what appeared to be an unpromising region.

After World War II, however, the discovery of oil, in particular. Predicted changes in evapotranspiration and runoff from – to – varied widely, depending on the climate scenario and direct CO 2 effects (Figs.

6 and 7). Under the PCM B1 scenario with the CO 2 routine, average regional evapotranspiration increased by 3 cmyear –1 (+6%) and average regional runoff increased by 5 cmyear. Regional effects of global warming are long-term significant changes in the expected patterns of average weather of a specific region due to global world average temperature is rising due to the greenhouse effect caused by increasing levels of greenhouse gases, especially carbon the global temperature changes, the changes in climate are not expected to be uniform.

Many parts of Europe have experienced a series of highly unusual summers with extremely dry/hot () and wet/cool (, ) years. Climate models predict that summers of this kind will become.

Historical climate and land use analysis. Historical water quality analysis carried out using the indicators such as minimum, mean and maximum DO, BOD, nitrate and ammonia (Fig. S1. Desertification is a type of land degradation in drylands in which biological productivity is lost due to natural processes or induced by human activities whereby fertile areas become increasingly more arid.

It is the spread of arid areas caused by a variety of factors, such as through climate change (particularly the current global warming) and through the overexploitation of soil through.

Climate change is a reality. A warming climate will have large effects on lakes of the Boreal Shield. Our ability to forecast these effects, however, is hampered by a very incomplete understanding of the actual interactions between weather and many aspects of lake ecosystems.

Climate change will affect lakes in very complex ways. Dale and her colleagues observed the climate models produced a much wider range of predictions — and therefore a higher degree of uncertainty — in the most arid regions of Africa.

Some models predicted positive changes in crop yields, while others estimated more negative effects in desert and savanna regions. Jan. 18, — Rainfall patterns in the Sahara during the 6,year 'Green Sahara' period have been pinpointed by analyzing marine sediments.

From 5, to. The study in the American Meteorological Society’s Journal of Climate predicts temperature rises of C compared to one IPCC forecast of C .For each climate projection, eight model scenarios were used to determine the sensitivity of predictions to different relationships between air and water temperature, and different snail mortality rates.

Maps were produced showing predicted changes in risk as a .Predicting the potential climatic effects of increased concentrations of atmospheric carbon dioxide requires the continuing development of climate models.

As one index of the magnitude of past climates change, the global mean temperature increase during the p years is similar to that predicted for carbon dioxide doubling.