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Zoekresultaten

43 resultaten
  1. Exploring changes in river nitrogen export to the worlds oceans - summary

    This paper discusses historical and future anthropogenic disturbance of river nutrient loads and export to coastal marine systems, which is a major global problem affecting water quality and...

  2. Effect of aggregation of soil parameters in spatially distributed pesticide leaching assessments

    Models developed for the national scale cannot be used for local predictions. This is the conclusion of a study on the effect of aggregation of soil parameters in spatially distributed pesticide...

  3. A global high-resolution emission inventory for ammonia

    A global emissions inventory for ammonia (NH3) has been compiled for the main known sources on a 1°×1° grid, suitable for input to global atmospheric models.

  4. Estimation of global river transport of sediments and associated particulate C, N, and P

    This paper presents a multiple linear regression model developed for describing global river export of sediments (suspended solids, TSS) to coastal seas, and approaches for estimating organic...

  5. N2O and NO emission from agricultural fields and soils under natural vegetation

    In this paper we present the latest analysis of N 2 O and NO emission measurement data for agricultural soils which has been used in the update of the IPCC Guidelines for National Emission...

  6. Global modeling of the fate of nitrogen from point and nonpoint sources in soils, groundwater, and surface water

    We present a global model that describes the fate of nitrogen (N) from point and nonpoint sources in the hydrological system up to the river mouths at the 0.5° by 0.5° spatial and annual temporal...

  7. Modeling global annual N2O and NO emissions from fertilized fields

    In this paper, information from 846 N 2 O emission measurements in agricultural fields and 99 measurements for NO emissions was used to describe the influence of various factors regulating...

  8. Closing the global N2O budget: A retrospective analysis 1500–1994

    We present new estimates of global nitrous oxide (N 2 O) emissions for the period 1500–1994 based on revised Intergovernmental Panel on Climate Change guidelines [Intergovernmental Panel on...

  9. Toetsen van bouwmaterialen aan normen en eisen

    In de ministeriële regeling (MR) bij het Bouwstoffenbesluit bodem- en oppervlaktewaterenbescherming (BB) wordt beschreven hoe bouwmaterialen dienen te worden getoetst; het zo genaamde...

  10. Estimating global land use change over the past 300 years: The HYDE database

    Testing against historical data is an important step for validating integrated models of global environmental change.