R. Colombo, L. Busetto, F. Fava, B. D. Mauro, M. Migliavacca, E. Cremonese, M. Galvagno, M. Rossini, M. Meroni, S. Cogliati, C. Panigada, C. Siniscalco, U. M. D. Cella
{"title":"Phenological monitoring of grassland and larch in the Alps from Terra and Aqua MODIS images","authors":"R. Colombo, L. Busetto, F. Fava, B. D. Mauro, M. Migliavacca, E. Cremonese, M. Galvagno, M. Rossini, M. Meroni, S. Cogliati, C. Panigada, C. Siniscalco, U. M. D. Cella","doi":"10.5721/ITJRS20114336","DOIUrl":"https://doi.org/10.5721/ITJRS20114336","url":null,"abstract":"This study compares MODIS NDVI 16-day (250 m) time series, acquired by Terra and Aqua platforms, for monitoring the phenological cycle of larch and grasslands in an alpine environment. The accuracy of MODIS 250 m Terra and Aqua phenological metrics �as evaluated for larch forests through comparison �ith field data. At regional level it �as carried out a correlation analysis bet�een the mean dates of start and end of season detected from MODIS Terra and Aqua in different years. Regional maps of start and end of season �ere derived from MODIS data and the interannual phenological variability of both ecosystems �as evaluated. Annual anomalies of the beginning of the gro�ing season, obtained from satellite data, �ere related �ith air temperature anomalies, computed from meteorological stations, to evaluate the effects of recent climate variability on the vegetation phenological cycle. Comparison �ith field phenological observations sho�ed that the start and the end of phenological cycle can be accurately determined from MODIS Terra and Aqua data and that an increase/decrease of 1°C in spring temperature lead to about 10 days in advance/ delay of the start of the gro�ing season.","PeriodicalId":56270,"journal":{"name":"Rivista Italiana Di Telerilevamento","volume":"29 1","pages":"83-96"},"PeriodicalIF":0.0,"publicationDate":"2011-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79213668","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
R. Colombo, L. Busetto, M. Migliavacca, E. Cremonese, M. Meroni, M. Galvagno, M. Rossini, C. Siniscalco, U. M. D. Cella
{"title":"On the spatial and temporal variability of Larch phenological cycle in mountainous areas","authors":"R. Colombo, L. Busetto, M. Migliavacca, E. Cremonese, M. Meroni, M. Galvagno, M. Rossini, C. Siniscalco, U. M. D. Cella","doi":"10.5721/ITJRS20094126","DOIUrl":"https://doi.org/10.5721/ITJRS20094126","url":null,"abstract":"In this st��y we analye the spatial antemporal variability of Eropean Larch phenological cycle in montainos areas (Val ���osta, Italy) bysing a combination of satelliteata, primary topographic attribtes (altit��e anaspect) anphenological moelsriven by climatic variables. We apply a remote sensing techniqe baseon a time series of MODIS �ERR� 250m 16-�ays NDVIata for mapping the inter-annal variability of phenological cycle. Starting from the satellite green-�p maps we spatially explorethe response of larch phenology atifferent terrain conitions varying for altit��e anaspect. � retrospective analysis baseon climate-�riven phenological moels was finally con��cteto evalate the magnit��e of temporal variability of Larch phenology in the last centry.","PeriodicalId":56270,"journal":{"name":"Rivista Italiana Di Telerilevamento","volume":"140 1","pages":"79-96"},"PeriodicalIF":0.0,"publicationDate":"2009-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86648982","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
S. Calvo, C. Orestano, A. Scannavino, Filippo Luzzu, M. Pirrotta, A. Tomasello, G. D. Maida
{"title":"Detection and mapping of Posidonia oceanica dead matte by high-resolution acoustic imaging","authors":"S. Calvo, C. Orestano, A. Scannavino, Filippo Luzzu, M. Pirrotta, A. Tomasello, G. D. Maida","doi":"10.5721/ITJRS200941210","DOIUrl":"https://doi.org/10.5721/ITJRS200941210","url":null,"abstract":"A high-resolution echosounder was used to acquire seismo-acoustic records of P. oceanica dead matte patches in the Gulf of Palermo. Seismo-acoustic profiling enabled detection of dead matte structures that are invisible to visual inspection, being hidden by variable layers of sandy sediment. The thickness of the dead matte measured reaches a maximum of 2.2 m. The mean volume of the matte per unit area of seabed surface (MEIx) varies from 0.2 to 2.2 m 3 /m 2 , with an average value of 1.6 m 3 /m 2 and a total volume estimated at 73,000 m 3 . From literature data and from the volume of dead matte calculated in the present work we estimated that total carbon accumulated in the matte is about 2,484 tons. Seismo-acoustic technologies proves to be a powerful, non-destructive method to measure the thickness, extension, volume of dead matte and its potential carbon content.","PeriodicalId":56270,"journal":{"name":"Rivista Italiana Di Telerilevamento","volume":"70 1","pages":"139-146"},"PeriodicalIF":0.0,"publicationDate":"2009-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85637683","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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