Blujdea Viorel

Blujdea Viorel
Universitatea Transilvania Brasov | unitbv · Department of Forest Management Planning and Terrestrial Measurements

About

57
Publications
12,459
Reads
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909
Citations
Citations since 2017
18 Research Items
545 Citations
2017201820192020202120222023020406080100
2017201820192020202120222023020406080100
2017201820192020202120222023020406080100
2017201820192020202120222023020406080100
Additional affiliations
April 2008 - April 2014
European Commission
Position
  • Scientific officer
Description
  • GHG inventory for LULUCF

Publications

Publications (57)
Article
Allometric models are commonly used to predict forest biomass. These models typically take nonlinear power-law forms that predict individual tree aboveground biomass (AGB) as functions of diameter at breast height (D) and/or tree height (H). Because the residual variance is in most cases heteroscedastic, accommodating the heteroscedasticity (i.e.,...
Conference Paper
Full-text available
The EU is at the forefront in fighting climate change. Following the commitments relevant for the Paris Agreement, the EU has recently pledged to cut off 55% of greenhouse gas (GHG) emissions by 2030 compared to 1990 and to reach climate neutrality in 2050. Currently, the Land Use, Land-use Change and Forestry (LULUCF) sector counterbalances about...
Article
Full-text available
1. Assessing the role of the forest-based bioeconomy in mitigating climate change requires a “system-perspective”, considering all possible options: increasing carbon stocks (‘net sink’) in forest land and in Harvested Wood Products (HWPs), and using wood to substitute other materials or fossil fuels. 2. Reducing the harvest appears the easiest op...
Article
Full-text available
Romania's forest policy is based on a long tradition in establishing and implementing the principles of sustainable management of forestry resources, based on a sound scientific and technical foundation. This resulted in a rigorous forestry regime, designed to operate efficiently under the conditions of state ownership over all forests. Over the pa...
Article
Full-text available
Tree diameter at breast height (D) and tree height (H) are often used as predictors of individual tree biomass. Because D and H are correlated, the combined variable D2H is frequently used in regression models instead of two separate independent variables, to avoid collinearity related issues. The justification for D2H is that above-ground biomass...
Article
Although it is commonly assumed that biomass allometric models are site specific, evaluations of site-effects are rarely undertaken. In this paper we develop biomass-allometric models to determine site influences. This study is based on data from 240 Norway spruce trees (Picea abies (L.) Karst.), growing in 24 early-growth plantations. A multilevel...
Article
Full-text available
Key message The purpose of this report is to increase the transparency of applications of the CBM-CFS3 model by climate-related policy-makers and researchers. The report provides explicit information on the parametrization of a new Archive Index Database used with this model to simulate forest carbon dynamics in 26 EU countries. The database can be...
Technical Report
This mini paper is one of a series of mini papers produced by the EIP - AGRI Focus Group 24 on New forest practices and tools for adaptation and mitigation of climate change. Communication for mitigation of climate change and adaptation to its impacts reflects one of the key questions identified in a starting paper elaborating on the scope of this...
Technical Report
Full-text available
Forests, unique in time and space, formed human history and are still closely related with our lives and future. Forests or forest ecosystems are characterized by the species they contain which are, in turn, depended on local environmental conditions and mostly temperature and precipitation. Climate and humans influenced and formed the present comp...
Article
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A comprehensive assessment of European forest-based biomass harvest potentials , their future utilization and implications on international wood product markets and forest carbon dynamics requires the capability to model forest resource development as well as global markets for wood-based commodities with sufficient geographical and product detail...
Article
Full-text available
Accurate carbon-balance accounting in forest soils is necessary for the development of climate change policy. However, changes in soil organic carbon (SOC) occur slowly and these changes may not be captured through repeated soil inventories. Simulation models may be used as alternatives to SOC measurement. The Yasso07 model presents a suitable alte...
Technical Report
Full-text available
The report is organised in four sections addressing respectively forestry, agriculture, fisheries & aquaculture, and algae. The reported data is centred on 2013. Total weight is generally expressed as a million tonnes (109 kg or Mt) of dry weight for the forestry and agricultural sector. In addition, for the fisheries and aquaculture, and algae sec...
Article
The compilation of GHG inventories has become a common practice to support environmental decision- and policy-making, for example in the context of the UNFCCC. To estimate GHG emissions, simulation models present viable alternatives to measured data. In order to make an informed decision on model selection, clear information on the purpose and appl...
Article
Reporting national greenhouses gas inventories for the Land Use, Land Use Change and Forestry (LULUCF) under the United Nations Framework Convention for Climate Change (UNFCCC) has been driving significant development of national data. Lands classification and definitions for C pools are very different across the 28 EU member states, as are the met...
Article
Full-text available
In this study the influence of tree’s age, location (i.e. latitude and altitude) and soil conditions (i.e. pH, humus content, carbon to nitrogen ratio, cation exchange capacity and percent base saturation) on tree allometry was investigated. The data was collected from 22 Norway spruce (Picea abies L. Karst) plantations located in Eastern Carpathia...
Article
Full-text available
The availability of long-term land datasets is fundamental to ensure consistent and accurate national greenhouse gas inventories for land use and land use changes. Estimation of Romania’s CO2removals and emissions over 1970-2010 was assessed comparatively by using National Statistics (as reference dataset), Corine Land Cover data, as well as four a...
Conference Paper
Full-text available
This paper underlines how black locust plantations play an important part in ensuring forest specific ecosystem services in Oltenia region located in South-Western part of Romania. Forest area in Oltenia region has diminished considerably in the last two centuries, and by the year 2010 it dropped to 5.3% of region area. This phenomenon generated de...
Technical Report
CAPRESE has led to a better understanding of the potential of using specific land management practices in preserving and increasing the stock of organic carbon in the agricultural soils of the EU. The scientific literature relating to a range of carbon sequestration measures has been synthesised and evaluated for their potential applicability. Land...
Article
Full-text available
The aim of the paper was to develop biomass equations for young black locust trees from plantations and coppices established in Southwest Romania. A destructive method was used to develop allometric biomass equations and to assess the carbon content of the individual tree and its biomass components. 418 black locust young trees (1-4 years old) from...
Article
Full-text available
The estimation of past and future forest carbon (C) dynamics in European countries is a challenging task due to complex and varying silvicultural systems, including uneven-aged forest management, and incomplete inventory data time series. In this study, we tested the use of the Carbon Budget Model of the Canadian Forest Sector (CBM-CFS3) in Italy,...
Article
Full-text available
The present work aims to bring forward an updated review of the research undertaken in Romania regarding black locust (Robinia pseudoacacia L.). Since 1852, after the first black locust plantations were established in south west of the country, foresters and other researchers published more than 150 articles and papers regarding aspects like biolog...
Article
Estimating soils organic carbon stock and its change in time is an actual concern for scientists and climate change policy makers. The present article firstly focus on determination of C stocks in Romania on forest soil types, as well as development of the spatial distribution mapping using a Geographic Information System (GIS) and also the secondl...
Article
Full-text available
Estimating soils organic carbon stock and its change in time is an actual concern for scientists and climate change policy makers. The present article firstly focus on determination of C stocks in Romania on forest soil types, as well as development of the spatial distribution mapping using a Geographic Information System (GIS) and also the secondl...
Article
Full-text available
While the Emissions Database for Global Atmospheric Research (EDGAR) focuses on global estimates for the full set of anthropogenic activities, the Land Use, Land-Use Change and Forestry (LULUCF) sector might be the most diverse and most challenging to cover consistently for all countries of the world. Parties to United Nations Framework Convention...
Article
Full-text available
While the Emissions Database for Global Atmospheric Research (EDGAR) focuses on global estimates for the full set of anthropogenic activities, the Land-Use, Land-Use Change and Forestry (LULUCF) sector might be the most diverse and most challenging to cover consistently for all world countries. Parties to UNFCCC are required to provide periodic est...
Article
The possibility of estimating young trees biomass is rather limited because forest yield tables are constructed starting from higher thresholds of proxy, such as diameter or height, and lack of availability of allometric equations. The aim of this study is to provide species-specific and general biomass equations for young plants often used for pla...
Article
Carbon (C) stock change and related Carbon Dioxide (CO2) emissions/removals from living biomass for Forest Land remaining Forest Land (IPCC sector 5-FL-1) are one of the most difficult to estimate because of the large natural fluxes of CO2 and the high accuracy requirements for deriving net changes of the large C stock. Following the Good Practice...
Article
Full-text available
The collapse of socialism in 1989 triggered a phase of institutional restructuring in Central and Eastern Europe. Several countries chose to privatize forests or to return them to pre-socialist owners. Here, we assess the implications of forest restitution on the terrestrial carbon balance. New forest owners have strong incentives to immediately cl...
Article
This paper provides a resource-based assessment of availability of biomass resources for energy production in Romania, at NUTS-3 level. The estimation of available biomass includes the residues generated from crop production, pruning of vineyards and orchards, forestry operations and wood processing. The estimation of crop residue availability cons...
Article
Full-text available
Initiatives for reducing anthropogenic greenhouse gas emissions from deforestation and degradation require transparent and robust methodologies for the estimation of emissions reduction or removal. Although carbon (C) stock change in degradation and devegetation by remote sensing are becoming increasingly powerful, the drivers of degradation, wood...
Article
Full-text available
One of the most visible components of the Forestry Development Project, carried out between 2003 and 2009 by the World Bank and Romanian Government was "PR support, Awareness Campaign and Development of PR products", meant to improve the communication between all stakeholders involved in sustainable forest management. The awareness campaign mainly...
Article
Full-text available
In this study biomass conversion and expansion factors (BCEFs) were developed for young Norway spruce trees planted on non-forest lands, in order to support quantification of carbon stock changes in biomass pools of afforestation works. Regression models for stem volume and stem wood density were also developed. The data set included 250 trees coll...
Article
Full-text available
One third of the territory of Romania is affected by land degradation (mainly water erosion and landslides). Climate change trends and impacts may double the areas affected. Since much of the country has lower forest coverage, urgent and ample measures of afforestations interventions are needed. The experience acquired on the improvement of degrad...
Conference Paper
Full-text available
The aim of this study was to identify forest areas vulnerable to the negative impact of the biotic and abiotic factors and to develop GIS based maps of these areas at national level. These maps will help forest decision makers to improve risk management measures. The data used to develop the maps was provided by the National Forest Administration....
Chapter
Full-text available
An important task of signatory parties to the United Nations Convention to Combat Desertification (UNCCD) declared “affected countries” is to adopt a National Action Programme (NAP). After limited implementation of the 2000 NAP, and while confronted with the severe drought of 2007, a decision was made to proceed with its revision. A decision making...
Article
Full-text available
The Kyoto Protocol accounting system and its market mechanisms, Clean Development Mechanism (CDM) and Joint Implementation (JI), are built on the key principle that emission and emission reduction units generated by afforestation/reforestation activities under national systems and projects are fully comparable, no matter their origin. Lack of consi...
Chapter
Full-text available
The effects of land use change on terrestrial carbon budgets for the Black Sea Region were investigated using remote sensing, forest inventory data, and a carbon model. We focus on three countries in the region: Romania, Georgia and Turkey. Rates of land use change between circa-1990 and circa-2000 were quantified by analyzing Landsat imagery. A ca...
Article
Full-text available
Remote sensing observations provide a cost-effective means of monitoring changes on Earth's surface over large areas. We used multitemporal observations derived from the Landsat global orthorectified datasets to map land cover changes in a wall-to-wall fashion in Romania over the period circa-1990 and circa-2000. A combination of the multispectral...
Chapter
Full-text available
Significant areas of unproductive and marginal lands create important economic and environmental imbalances at local, regional and national level, in many Eastern Europe countries. Despite available scientific and technological solutions for their enhancement, existing large degraded areas require major financing. Afforestation of degraded lands is...
Article
The effect of stand age on soil respiration and its components was studied in a first rotation Sitka spruce chronosequence composed of 10-, 15-, 31-, and 47-year-old stands established on wet mineral gley in central Ireland. For each stand age, three forest stands with similar characteristics of soil type and site preparation were used. There were...
Article
Financing afforestation works is relatively difficult for the countries with economy in transition. The carbon financing may act as an incentive for national resource identification (both in terms of funds and lands to be afforested) and it generally improves significantly the economic return of the afforestation works. The paper shows some practic...
Article
Full-text available
At the 70th celebration of the Institute this paper review the overall progress in the knowledge achievement in the area of tree physiology and fo- rest ecophysiology in our country, significantly exemplified by results regard- ing the mesoxerophytic oaks (Quercus cerris L. si Q. frainetto ten.) and the stand ecophysiology of such ecosystems of gre...
Article
Full-text available
The forester' perception on the effect of climate change on forests have been tes- ted by a questionnaire sent to forest ranges all over the country. Answer rate has been like 50 % but the quality of answers have been quite variable, what suggests a limitation of fur- ther use of this methods for such research purposes. According the answers the fo...
Article
Full-text available
This paper reviews the main aspects regarding the carbon storage that occurs after afforestation. By afforestation the initial changes that happen consist in carbon emissions from both removing the existing biomass and disturbing the soil. As the plantation is growing, carbon accumulates in biomass and also in soil. The most important amount of car...

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Projects

Projects (6)
Project
In this project we aim to develop allometric biomass models for European beech in Romania using TLS approach and address some of the limitations of TLS approach: (i) predict the wood density variation within and between trees; (ii) improve the accuracy of leaf biomass estimation based on predictors derived from crown architecture; (iii) compare some algorithms for reconstruction of tree volume; (iv) investigate the sensitivity of allometric model parameters to uncertainty in wood density and leaf biomass; (v) assess the relative contribution of TLS-based approach on large scale biomass estimation uncertainty.
Project
The experience of recent years in public debate has shown that, besides an image crisis of the national forest sector, a deep intra- and inter-sectoral communication crisis is noticed, which has led many times to several decision-making bottlenecks, over-regulation and under-financing of the sector, or to a sine die postponement of the adoption of policy documents (for example: the national forest strategy) or of the creation of specific intra- or inter-sectoral structures. Considering this status quo that has caused moments of real institutional amnesia, this project aims to establish a platform for developing a forest management vision that would underlie a new public policy in the forest field, in accordance with the international strategic documents and with the current challenges in the national forest sector.
Archived project