Search results for "Long term data"

showing 3 items of 3 documents

Effects of changing climate on European stream invertebrate communities : A long-term data analysis

2018

Long-term observations on riverine benthic invertebrate communities enable assessments of the potential impacts of global change on stream ecosystems. Besides increasing average temperatures, many studies predict greater temperature extremes and intense precipitation events as a consequence of climate change. In this study we examined long-term observation data (10-32years) of 26 streams and rivers from four ecoregions in the European Long-Term Ecological Research (LTER) network, to investigate invertebrate community responses to changing climatic conditions. We used functional trait and multi-taxonomic analyses and combined examinations of general long-term changes in communities with deta…

0106 biological sciencesConservation of Natural ResourcesEnvironmental EngineeringClimate ChangeEcology (disciplines)ta1172010603 evolutionary biology01 natural sciencesRiversAnimalsEnvironmental ChemistryEcosystemWaste Management and DisposalEcosystemInvertebrateEcology010604 marine biology & hydrobiologyfungiTemperatureExtreme eventsGlobal changeInvertebratesPollutionEuropeBenthic zoneLong term dataEnvironmental scienceta1181sense organsIntroduced SpeciesBiologieScience of the Total Environment
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Exploring the validity of the long term data record V4 database for land surface monitoring

2015

The last (and final) version of the Long Term Data Record (LTDR) — Version 4 — has been released recently by NASA. This database includes daily information for all AVHRR (Advanced Very High Resolution Radiometer) channels, as well as ancillary data, since July 1981 up to present. This database is the longest available record of remotely sensed data useful for land surface monitoring, since it allows the estimation of vegetation indices at daily resolution, as well as the daily estimation of land surface temperature (LST). Here, we analyze the fitness of this database for land surface monitoring. To that end, we first estimated NDVI (Normalized Difference Vegetation Index), LST, as well as e…

Ancillary dataSeries (stratigraphy)GeographyDatabaseAdvanced very-high-resolution radiometerLong term dataSolar zenith angleVegetationTime seriescomputer.software_genrecomputerNormalized Difference Vegetation IndexRemote sensing2015 8th International Workshop on the Analysis of Multitemporal Remote Sensing Images (Multi-Temp)
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Using NASA'S Long Term Data Record version 3 for the monitoring of land surface vegetation

2011

Numerous datasets have been made available for the observation of our planet from space. The aim of this work is the observation of changes in vegetation, through the use of a recent remote sensing dataset, NASA's Long Term Data Record (LTDR). Several authors have pointed out that vegetation monitoring benefits of the simultaneous use of Normalized Difference Vegetation Index (NDVI) and land surface temperature (LST). Therefore, this work presents the procedure developed to monitor vegetation with the LTDR dataset, using both NDVI and LST parameters. This procedure includes data preprocessing (estimation of NDVI and LST, orbital drift correction, atmospherically contaminated data reconstruc…

Land surface temperatureRemote sensing (archaeology)Data reconstructionLong term dataEnvironmental scienceVegetationData pre-processingTime seriesNormalized Difference Vegetation IndexRemote sensing2011 6th International Workshop on the Analysis of Multi-temporal Remote Sensing Images (Multi-Temp)
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