Search results for " Change"

Optimizing management to enhance multifunctionality in a boreal forest landscape

2017

The boreal biome, representing approximately one-third of remaining global forests, provides a number of crucial ecosystem services. A particular challenge in forest ecosystems is to reconcile demand for an increased timber production with provisioning of other ecosystem services and biodiversity. However, there is still little knowledge about how forest management could help solve this challenge. Hence, studies that investigate how to manage forests to reduce trade-offs between ecosystem services and biodiversity are urgently needed to help forest owners and policy makers take informed decisions. We applied seven alternative forest management regimes using a forest growth simulator in a la…

The emissions reduction potential of substituting short-haul flights with non-high-speed rail (NHSR) : The case of Finland

2021

Replacing short-haul flights with high-speed rail (HSR) has been widely discussed as one solution to mitigate the climate change impacts of aviation. However, although HSR can provide travel times similar to those provided by short-haul flights, and at lower emission levels, it also requires considerable investments in time and infrastructure to build. Instead, this study considers the feasibility of replacing short-haul flights with existing non-high-speed rail (NHSR). Our study is based in Finland, a country that has an extensive route network of short-haul flights but does not possess any HSR. We compared all 16 city pairs for which short-haul flights are offered with existing NHSR based…

Determinants of the interannual relationships between remote sensed photosynthetic activity and rainfall in tropical Africa

2007

International audience; The response of photosynthetic activity to interannual rainfall variations in Africa South of the Sahara is examined using 20 years (1981-2000) of Normalised Difference Vegetation Index (NDVI) AVHRR data. Linear correlations and regressions were computed between annual NDVI and annual rainfall at a 0.5° latitude/longitude resolution, based on two gridded precipitation datasets (Climate Prediction Center Merged Analysis of Precipitation [CMAP] and Climatic Research Unit [CRU]). The spatial patterns were then examined to detect how they relate to the mean annual rainfall amounts, land-cover types as from the Global Land Cover 2000 data set, soil properties and soil typ…

A simple scaling procedure to assess the impact of climate change on extreme precipitation

2017

In this study we used the products of the Regional Climate Models (RCMs) to evaluate the impact of climate alterations on extreme events across the Region of Sicily (Italy). Data have been retrieved from EURO-CORDEX simulations at 12 km of spatial resolution. Because of the low resolution, the RCMs products are likely unsuitable to reproduce consistently sub-daily heavy precipitations. For this reason, extreme events at daily scale were first checked out by comparing the quantiles estimated from raingauge observations and RCMs outputs. Secondly, we implemented a temporal downscaling approach to estimate rainfall for durations of 1, 3, 6, 12, 24 hours from the modeled daily precipitation. La…

Current Social and Rangeland Access Trends among Pastoralists in the Western Algerian Steppe

2021

International audience; In the western Algerian steppe, the public authorities have carried out actions aimed at rural development (agricultural development programs) and combating desertification (grazing reserves) to counter the significant and rapid loss of vegetation cover of pastures by overgrazing, and the consequent impacts on local livelihoods. In the Rogassa area, these actions have impacted land tenure and the ancestral and collective way of land use and access. These changes have caused transformations in lifestyle and pasture management. This research aims to characterize how such changes are affecting local pastoralists and what their perceptions are about them. A selective sam…

IPCC:n raportti julkaistiin poliittisesti jännitteiseen aikaan - Yhdysvallat ja muu maailma ovat nokikkain ilmastokeskustelussa

2018

Profiles of reading and fluency and spelling skills : stability and change across the early school years

2023

In this longitudinal study, we examined what kind of profiles of reading fluency and spelling skills could be identified among pupils (N = 467) and how stable these profiles were during the first three years of school. We also investigated how monolingual (Swedish) and simultaneously bilingual (Finnish-Swedish) pupils and gender were distributed within the profiles. Three profiles of reading fluency and spelling skills were found among the pupils through latent profile analysis: low, average, and high performing. Latent transition analysis confirmed stable and identical profiles throughout the first school years. The distributions of monolingual and bilingual pupils and gender were equal in…

Tradición y modernidad en las políticas educativas en España: una revisión de las últimas décadas

2008

In the present paper, we will present an approximate outlook of a few of the more relevant issues that determine, at the same time that reflect, the Spanish educative policies deployed from 1980 up to now. This scan of the last 25 years will allow us to see (even in a superficial and inevitably partial fashion) the tension and dialectic between tradition (noted for the persistence of outdated forms of conceiving and delivering education) and modernity (bearer of innovative trends, although not exempt from ambivalence and contradictions in its own development). We will pay close attention to those axes that can work as a starting point for our reflection, namely: educative policies, organiza…

Climate Resilience Pathways of Rural Households. Evidence from Ethiopia

2018

This paper explores the resilience capacity of rural Ethiopian households after the drought shock occurred in 2011. The work develops an original empirical framework able to capture the policy and socio-economic determinants of households’ resilience capacity by making parametric statistical assumption on the resilience distribution. To this end, the analysis employs a two-wave representative panel dataset aligned with detailed weather records while controlling for a large set of household- and community-level characteristics. The analysis shows that the majority of these factors affects significantly resilience capacity only in the group of households affected by the drought shock, suggest…

PUBLIC POLICY PLANNING TO ENHANCE THE RESILIENCE OF SOCIO-ECOLOGICAL SYSTEMS TO CLIMATE CHANGE: OPERATIONALIZING RESILIENCE CONCEPTS FROM A DYNAMIC P…

This study outlines a system dynamic based approach to the planning for resilience in food systems to climate change. The processes described and the insights gained are novel in the literature since they focus on describing operational aspects of resilience that can be generalized to multiple contexts and problems. On the one hand, the process described offers an aid for researchers and practitioners operationalizing resilience in public sector settings. Simultaneously, the insights gained from multiple stakeholder discussions and modelling work open new questions regarding the general mechanisms driving resilience in food systems. Climate change is threatening the extent to which social, …