Spelling suggestions: "subject:"life ono earth"" "subject:"life onn earth""
1 |
The use of interval-related expert knowledge in processing 2-D and 3-D data with an emphasis on applications to geosciences and biosciences /Araiza, Roberto, January 2007 (has links)
Thesis (Ph. D.)--University of Texas at El Paso, 2007. / Title from title screen. Vita. CD-ROM. Includes bibliographical references. Also available online.
|
2 |
Stable strontium isotope fractionation in marine and terrestrial environmentsStevenson, Emily Isabel January 2012 (has links)
The work reported in this thesis applies a new isotope tracer, stable strontium isotopes (δ<sup>88/86</sup>Sr), to address questions concerning changes in global climate that occur in response to continental weathering processes, and to constrain the modern marine geochemical Sr cycle. Stable Sr isotopes are a relatively new geochemical proxy, and as such their behavior needs to be understood in differing forms of marine calcium carbonate, the archives from which records of past stable Sr variability in the oceans can be constructed. Foraminifera, coccoliths and corals (both aragonite and high Mg calcite) acquire δ<sup>88/86</sup>Sr values lighter than that of modern day seawater, (approximately 0.11, 0.05, 0.2 and 0.19 ‰ lighter than seawater at ~25°C respectively) providing a measureable offset which can be used to constrain the modern Sr outputs from the ocean and provide a better understanding of the modern Sr cycle. Using foraminifera as a sedimentary archive the first marine δ<sup>88/86</sup>Sr record of seawater over the last two glacial cycles has been constructed, and used to investigate changing carbonate input and output over this 145 kyr period. Modelling of the large excursion of δ<sup>88/86</sup>Sr to heavier values during Marine Isotope Stage (MIS) 3, reveals that this is more likely to be due to local changes in seawater or post-depositional alteration, rather then whole ocean changes. In the terrestrial environment δδ88/86<sup>Sr</sup> has been measured in the dissolved load of rivers from the Himalaya. It is found that, in general, rivers draining carbonate catchments possess lighter isotopic δ<sup>88/86</sup>Sr values than those from rivers draining silicates. Covariations of either δ88/86Sr vs. δ30Si or δ<sup>88/86</sup>Sr vs. 1/[Sr] can be used to distinguish between rivers draining different catchment areas.
|
3 |
Environmental/ecological, economic, and social factors inhumanitarian response : A qualitative case study reviewing the humanitarian response delivered by USAID in Haiti with the sustainable dimensions in focusMadsen, Ane Kok January 2022 (has links)
In the past decades, there has been an alarming increase in the amount of toxicity on earthdue to pollution and consumerism and the natural environment is faster than everdisappearing due to the extensive activity of humans on planet earth (Nations United,2020; United Nations, 2020). The increased amount of rubbish and non-natural waste hasbeen identified as a major issue in the supply chain and waste management inhumanitarian organizations across the board. This thesis has reviewed existing academic research and identified the five commonthemes: Management – training and standardization – stakeholders and donors -transparency - climate change and development, in which the ability to become moresustainable is present. United States Agency for International Development (USAID) hasbeen showing environmental accountability and for that reason, its environmental policyand supply chain have been addressed to understand its waste management and if it issupporting the three sustainable dimensions. Plastic pollution is addressed as a humanitarian crisis and arguing that the devastatingeffects that microplastics are having on our ecosystem and it is clearly showing that it iscausing harm to the environment, the economy, and the social effect. Haiti has since theearthquake in 2010 received a variety of aid, majority from USAID but the sustainableaccountability in their action have been hard to identify. Reviewing the work of USAID and their collaboration with environmental protectioncompanies makes you likely to say that they are supporting the three sustainabledimensions but with further assessment, it is obvious, that humanitarian waste is doingharm and there must be improvements within the organization’s perspective onwaste/plastic while attending a crisis.
|
Page generated in 0.0723 seconds