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Results of repeated precise leveling in several regions indicate that the magnitude of inferred vertical displacements is controlled by the quality of benchmark monumentation. If ignored, such a correlation may lead to an erroneous tectonic interpretation of the computed pattern of motion. 相似文献
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D. Javorsek II M. C. Brewer J. B. Buncher E. Fischbach J. T. Gruenwald J. Heim A. W. Hoft T. J. Horan J. L. Kerford M. Kohler J. J. Lau A. Longman J. J. Mattes T. Mohsinally J. R. Newport M. A. Petrelli C. A. Stewart J. H. Jenkins R. H. Lee B. Morreale D. B. Morris R. Mudry D. O’Keefe B. Terry M. A. Silver P. A. Sturrock 《Astrophysics and Space Science》2012,338(1):9-13
A new prediction technique based on logarithmic values is proposed to predict the maximum amplitude (R
m) of a solar cycle from the preceding minimum aa geomagnetic index (aa
min). The correlation between lnR
m and lnaa
min (r=0.92) is slightly stronger than that between R
m and aa
min (r=0.90). From this method, cycle 24 is predicted to have a peak size of R
m(24)=81.7(1±13.2%). If the suggested error in aa (3 nT) before 1957 is corrected, the correlation coefficient between R
m and aa
min (r=0.94) will be slightly higher, and the peak of cycle 24 is predicted much lower, R
m(24)=52.5±13.1. Therefore, the prediction of R
m based on the relationship between R
m and aa
min depends greatly on the accurate measurement of aa. 相似文献
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A common management technique for preserving and maintaining biodiversity is the establishment of large refuges and preserves.
Although extensive sanctuaries can provide crucial protection for many organisms and ecosystems, they cannot fulfill all the
needs of regional conservation. An alternative to a few large refuges is to create many different habitats across the landscape
that enhance and improve local and regional biodiversity and provide immediate benefits to nearby communities in the form
of ecosystem services. Furthermore, these can all be initiated and achieved by individuals or communities. Some key landscape
enhancements can be undertaken on a local level: the creation or expansion of small wooded areas, windbreaks, or hedgerows;
the construction of small wetlands; and the release of some lands from heavy pressure for the reestablishment of natural ecological
processes, namely, the natural accumulation of woody and other organic materials. Newly created ecosystems can be inoculated
at the outset with soil biota such as seed banks, microbes, fungi, and organic material that can accelerate ecological functioning
and balance. In addition to increasing much local and regional biodiversity, locally enhanced areas can provide fuel, plant
and animal food and medicinal products, and agroforestry products directly to the nearby community. These small ecological
oases can serve as nesting and overwintering sites for numerous pollinators that are hugely beneficial to agricultural production.
Moreover, several ecosystem enhancements may contribute positively to local and regional hydrologic cycles and prevent prolonged
droughts. Enhancements to local landscapes can take on many forms. We believe that any changes that increase structural complexity
in natural systems almost certainly lead to increases in local biological complexity. In addition, wider landscape level considerations,
such as corridors and connectivity of populations, can be integrated on a broader scale to improve regional biodiversity and
ecosystem services. Small landscape enhancements undoubtedly cannot provide for all conservation needs, but they can greatly
increase widespread biodiversity, restore local ecosystem services, and can be used to complement the relatively few larger
parks. 相似文献
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Simone Gabriele Parisi Moreno Mauro Antoniazzi Gabriele Cola Lorenzo Lovat Luigi Mariani Giacomo Morreale Kiss Zoltan Antonio Calò 《Climatic change》2014,126(3-4):443-454
Since 1740 until now, the Book of Vine Branches encompasses beautiful pictorial representations of shoots and sprouts, collected every year on April 24th in the vineyards of the Hungarian town of K?szeg. A long time series (1740–2009) of sprouts phenological development coded with the BBCH scale is obtained through paintings visual inspection. Consequently, a model relating sprouts development with thermal resources accumulation is developed on the base of Wien daily air temperature series for the 1857–2009 period. Thermal resources is obtained with the Normal Heat Hours approach, a response curve method that takes into account the nonlinear response of phenological development to temperature. The model, calibrated and validated on the 1930–2009 period, shows an overestimation of thermal resources when applied to the 1857–1929, due to the more advanced phenology of that phase. Since this advance can be ascribed to genetics and management instead of more favorable thermal conditions, model outputs previous to 1930 are decreased by a constant factor. Finally, the 1740–2009 time series of grapevine spring thermal resources is obtained applying the model to the complete phenological time series. The analysis of the series highlights a first phase (1740–1780) characterized by high and stable availability of thermal resources during the 1740–1780, a second phase (1781–1820) with the lowest level of resources, a phase of intermediate availability (1821–1929) and a final present phase (1930–2009) with renewed high availability. The adopted method overcomes the lack of correlation for the post 1960 period shown by previous works. 相似文献
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Patti Graziano Grassi Sabrina Morreale Gabriele Corrao Mauro Imposa Sebastiano 《Natural Hazards》2021,108(3):2467-2492
Natural Hazards - The occurrence of strong and abrupt rainfall, together with a wrong land use planning and an uncontrolled urban development, can constitute a risk for infrastructure and... 相似文献
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