Search results for "Clima"

Seasonal variation of average phytoplankton concentration in the Kattegat—a periodical point model

2003

Abstract Seasonal variations in primary production, phytoplankton biomass, chlorophyll-a, dissolved inorganic phosphorus and nitrogen concentrations in the upper 10 m of the Kattegat were analysed by means of monitoring data from 1993–1997. Spatial optimal analysis, based on a stochastic model, was used to reconstruct weekly constituent fields onto a spatial grid. The reconstructed fields were spatially integrated, resulting in a relatively smooth seasonal variability of the average variables. A simple dynamical model, set up as a periodical boundary problem, is suggested for the average phytoplankton concentration, dissolved inorganic nitrogen and entrainment depth as state variables. The …

Changing forest stakeholders’ perception of ecosystem services with linguistic nudging

2019

This paper explores whether the perceptions of forest owners and professionals could be nudged towards more sustainable management practices by adjusting a policy text's metaphorical content. Recent research has demonstrated a link between information interventions and preference change, but there is a need to further explore individuals' reactions to information on forest-based ecosystem services and to link these to the design of policy instruments. We contribute to narrowing this gap by nudging the content of a policy text comparing rotation forest management (RFM) and continuous cover forestry (CCF), and exposing it to forest stakeholders. The research is carried out in Finland, the so-…

Le changement climatique : où en sommes-nous ?

2018

Greenhouse gases (GHGs), naturally part of the atmosphere, have protected us from severe glaciations in the past. Today, human activities increase GHG concentrations and cause rapid and unprecedented Earth warming. Climate change is not resume only to warming, water cycle is also changed. All the research confirms: the climate is changing fast, too fast for ecosystems and societies to adapt. Despite the alerts of the international scientific community, States gathered into Conferences of the Parties (COP) ratify agreements but do not comply with all their commitments. Public opinion polls indicate that climate change is perceived as a risk, but jobs and taxes override environmental concerns…

Hafnium-neodymium isotope evidence for enhanced weathering and tectonic-climate interactions during the Late Cretaceous

2022

<p>Over million-year timescale the carbon cycle evolution is driven by mantle CO<sub>2</sub> degassing (source) and by continental weathering that drawdowns atmospheric CO<sub>2</sub> through silicate weathering reactions (sink). Based on a novel geochemical proxy of chemical weathering intensity (i.e. using measurements of Hf and Nd isotope ratios in clay-size fractions of sediments) and clay mineralogy, we discuss the links between tectonic, continental weathering and climate evolution during the late Cretaceous. That period records the very first step of the last greenhouse to icehouse transition and is concomitant to …

Aula de innovación educativa

2012

Se exponen los fundamentos de trabajo cooperativo en pequeños grupos, el análisis de los obstáculos para su pleno aprovechamiento y se presentan algunas formas concretas para superarlos. El objetivo responde a la discrepancia entre lo que la investigación e innovación educativa ha venido mostrando acerca del interés del trabajo en pequeños grupos para la creación de un clima en el aula favorecedor del aprendizaje, y la constatación de la escasa utilización de esta estrategia. Cataluña Consejeria de Educación, Formación y Empleo. Servicio de Publicaciones y Estadística; Avda. de la Fama, 15, 1ª planta; 30006 Murcia; Tel. +34968279685; Fax +34968279835; mjesus.ruiz@carm.es ESP

Il clima nell'isola? Tende all'aridità, lo dicono le variabili pioggia e temperatura

2007

Effetti del clima sul successo riproduttivo del grillaio Falco naumanni

2013

Cambiamenti climatici e allergie

2018

Il cambiamento climatico rappresenta una delle maggiori minacce per l’umanità e la natura, in grado di influenzare sia la salute dell’uomo e degli animali che il ciclo vitale delle piante. Numerosi studi hanno infatti evidenziato effetti sugli ecosistemi descrivendo un trend di anticipo generale negli eventi fenologici, sia per le specie vegetali sia per quelle animali. Gli Autori considerano tra i vari fattori responsabili nel contribuire a queste variazioni i parametri climatici, principalmente la temperatura e gli inquinanti atmosferici, in particolare l’anidride carbonica. Le complesse interazioni tra fattori climatici ed inquinanti ambientali, causa di aumentata crescita di specie arbo…

État actuel des réseaux de mesures éco-climatiques en Afrique centrale : les ambitions du projet de recherche international FORGREENE.

2016

This work presents an overview of spatio-temporal quality andspatial density of rainfall networks of Cameroon, Gabon, Congo, CAP and DRC, particularly in the recentperiod (1973-2014) through the GSOD international database. Faced with enormous gaps observed, theseresults will help to select metrological and analytical orientations in FORGREENE project (Tropical forestsgreeness and cloudiness in Central Africa: present conditions and future evolution). A comparison with rainfallsatellite estimates (RFE type) also indicates their great potential, provided they are based on in situ validations.

OPTEER, une expérience de co-construction d’un outil de connaissance et d’aide à la décision dans le domaine Climat-Energie à échelles loco-régionales

2014

International audience