Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 490427
Title Spatial Sampling Design for Estimating Regional GPP With Spatial Heterogeneities
Author(s) Wang, J.H.; Ge, Y.; Heuvelink, G.B.M.; Zhou, C.H.
Source IEEE Geoscience and Remote Sensing Letters 11 (2014)2. - ISSN 1545-598X - p. 539 - 543.
Department(s) Soil Geography and Landscape
Publication type Refereed Article in a scientific journal
Publication year 2014
Keyword(s) optimization - geostatistics - strategies - maize
Abstract The estimation of regional gross primary production (GPP) is a crucial issue in carbon cycle studies. One commonly used way to estimate the characteristics of GPP is to infer the total amount of GPP by collecting field samples. In this process, the spatial sampling design will affect the error variance of GPP estimation. This letter uses geostatistical model-based sampling to optimize the sampling locations in a spatial heterogeneous area. The approach is illustrated with a real-world application of designing a sampling strategy for estimating the regional GPP in the Babao river basin, China. By considering the heterogeneities in the spatial distribution of the GPP, the sampling locations were optimized by minimizing the spatially averaged interpolation error variance. To accelerate the optimization process, a spatial simulated annealing search algorithm was employed. Compared with a sampling design without considering stratification and anisotropies, the proposed sampling method reduced the error variance of regional GPP estimation.
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