Data Assimilation in Forest Inventory: First Empirical Results

Data Assimilation in the Solar Wind: Challenges and First Results

Data assimilation (DA) is used extensively in numerical weather prediction (NWP) to improve forecast skill. Indeed, improvements in forecast skill in NWP models over the past 30 years have directly coincided with improvements in DA schemes. At present, due to data availability and technical challenges, DA is underused in space weather applications, particularly for solar wind prediction. This p...

Regression Analysis for Forest Inventory Data

In this paper the data of a forest health inventory are analysed. Since 1983 the degree of defoliation (damage), together with various explanatory variables (covariates) concerning stand, site, soil and weather, are recorded by the second of the two authors, in the forest district Rothenbuch (Spessart, Bavaria). The focus is on the space and time dependencies of the data. The mutual relationshi...

Estimating forest conversion rates with annual forest inventory data

The rate of land-use conversion from forest to nonforest or natural forest to forest plantation is of interest for forest certification purposes and also as part of the process of assessing forest sustainability. Conversion rates can be estimated from remeasured inventory plots in general, but the emphasis here is on annual inventory data. A new estimator is proposed based on analysis of plot-l...

Forest inventory

The effect of forest characteristics on ALS-based inventory results

The management planning system of Finnish private forests is currently changing from mainly field inventory–based into one that makes use of airborne laser scanning (ALS) data, aerial photographs and a sample of field plots. In the traditional system every stand of the inventoried area is visited and some relascope sample plots measured within the stand. This is time consuming, expensive, and p...