Spatial Patterns of Round Wood Transport Associated with Mobile Data Systems in Sweden

The use of mobile data systems (MDS) in round wood transport is increasing. The most common functions for MDS include: distribution of transport plans and orders, navigation to the forest site (GPS, GIS) and reporting of transport volumes. This paper examines the transport patterns for trucks with and without the support of MDS in central Sweden. The variables are based on data from 13 trucks with MDS and 13 without MDS. All trucks were operating within the same planning organization however the selection of trucks to be equipped with MDS support was done independent of this study. Data was collected using a random sample of 5 days per month over one year of operations. While the number of operating days per month was similar for the two groups, other differences were observed. The daily number of separate forest destinations was 4.13 for trucks with MDS and 3.70 for those without. The daily number of separate mill destinations visited was 2.66 for trucks with MDS and 2.17 for those without. The size of the total annual operating area was 29,050 km2 for those with MDS and 18,656 km2 for those without. The main operating area constituted 35.3 % and 28.2 % of the total annual operating areas for trucks with and without MDS, respectively

The SIBERIA -II Project as seen by Envisat ASAR

ABSTRACT In the SIBERIA-II project Earth Observation (EO) data are used to derive a set of products, which are then fed into global and regional greenhouse gas accounting approaches. The overall aim of the project is to devise an integrated "EO-modelling" methodology for full carbon accounting at regional scale, and to quantify the accounting for an over 3 Mio km 2 area in Central Siberia. For the derivation of the EO products, SIBERIA-II makes use of most of current orbiting satellites and currently represents the major user of ASAR ENVISAT data. Within the project several issues ranging from data post-processing to derivation of EO-products and development of new techniques for land applications are treated. An experiment on geometric and radiometric validation of Wide Swath data showed the importance of the processor used for preparing the data to be further used in applications. The interferometric coherence from ASAR repeat-pass pairs acquired under stable winter conditions shows contrast between forests and bare soils. Alternating Polarisation data seems to be promising for forest/non-forest mapping. For wetlands, ASAR Wide Swath data is used for the operational monitoring of open water surfaces, reaching high classification accuracy. ASAR Wide Swath is also evaluated for pollution damage identification and fire scar detection. Finally, the long time series of ERS and ASAR Image Mode data allows detecting deforestation activities over almost one decade

<scp>ReSurveyEurope</scp>: A database of resurveyed vegetation plots in Europe

AbstractAimsWe introduce ReSurveyEurope — a new data source of resurveyed vegetation plots in Europe, compiled by a collaborative network of vegetation scientists. We describe the scope of this initiative, provide an overview of currently available data, governance, data contribution rules, and accessibility. In addition, we outline further steps, including potential research questions.ResultsReSurveyEurope includes resurveyed vegetation plots from all habitats. Version 1.0 of ReSurveyEurope contains 283,135 observations (i.e., individual surveys of each plot) from 79,190 plots sampled in 449 independent resurvey projects. Of these, 62,139 (78%) are permanent plots, that is, marked in situ, or located with GPS, which allow for high spatial accuracy in resurvey. The remaining 17,051 (22%) plots are from studies in which plots from the initial survey could not be exactly relocated. Four data sets, which together account for 28,470 (36%) plots, provide only presence/absence information on plant species, while the remaining 50,720 (64%) plots contain abundance information (e.g., percentage cover or cover–abundance classes such as variants of the Braun‐Blanquet scale). The oldest plots were sampled in 1911 in the Swiss Alps, while most plots were sampled between 1950 and 2020.ConclusionsReSurveyEurope is a new resource to address a wide range of research questions on fine‐scale changes in European vegetation. The initiative is devoted to an inclusive and transparent governance and data usage approach, based on slightly adapted rules of the well‐established European Vegetation Archive (EVA). ReSurveyEurope data are ready for use, and proposals for analyses of the data set can be submitted at any time to the coordinators. Still, further data contributions are highly welcome.</jats:sec