The role of remote sensing in assessing the impact of climate variability on vegetation dynamics in Europe
Tese de doutoramento em Ciências Geofísicas e da Geoinformação (Detecção Remota), apresentada à Universidade de Lisboa através da Faculdade de Ciências, 2008 The study aims at investigating the relationship between climate variability and vegetation dynamics by combining meteorological and remote-se...
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Online Access: | http://hdl.handle.net/10451/1572 |
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ftunivlisboa:oai:repositorio.ul.pt:10451/1572 2023-05-15T17:36:53+02:00 The role of remote sensing in assessing the impact of climate variability on vegetation dynamics in Europe Gouveia, Célia Marina Pedroso, 1970- Câmara, Carlos Portugal da, 1957- Trigo, Ricardo M., 1967- 2010-07-27T08:59:36Z application/pdf http://hdl.handle.net/10451/1572 eng eng http://hdl.handle.net/10451/1572 openAccess Detecção remota Dinâmica da vegetação Teses de doutoramento - 2008 doctoralThesis 2010 ftunivlisboa 2022-11-23T01:05:19Z Tese de doutoramento em Ciências Geofísicas e da Geoinformação (Detecção Remota), apresentada à Universidade de Lisboa através da Faculdade de Ciências, 2008 The study aims at investigating the relationship between climate variability and vegetation dynamics by combining meteorological and remote-sensed information. The vegetation response to both precipitation and temperature in two contrasting areas (Northeastern Europe and the Iberian Peninsula) of the European continent is analysed and special attention is devoted to the impact of the North Atlantic Oscillation (NAO) on the vegetative cycle in the two regions which is assessed taking into account the different land cover types and the respective responses to climate variability. An analysis is performed of the impact of climate variability on wheat yield in Portugal and. the role of NAO and of relevant meteorological variables (net solar radiation, temperature and precipitation) is investigated. Using spring NDVI and NAO in June as predictors, a simple regression model of wheat yield is built up that shows a general good agreement between observed and modelled wheat yield values. The severity of a given drought episode in Portugal is assessed by evaluating the cumulative impact over time of negative anomalies of NDVI. Special attention is devoted to the drought episodes of 1999, 2002 and 2005. While in the case of the drought episode of 1999 the scarcity of water in the soil persisted until spring, the deficit in greenness in 2005 was already apparent at the end of summer. Although the impact of dry periods on vegetation is clearly noticeable in both arable land and forest, the latter vegetation type shows a higher sensitivity to drought conditions. Persistence of negative anomalies of NDVI was also used to develop a procedure aiming to identify burned scars in Portugal and then assess vegetation recovery over areas stricken by large wildfires. The vulnerability of land cover to wildfire is assessed and a marked contrast is found between forest and ... Doctoral or Postdoctoral Thesis North Atlantic North Atlantic oscillation Universidade de Lisboa: repositório.UL |
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Open Polar |
collection |
Universidade de Lisboa: repositório.UL |
op_collection_id |
ftunivlisboa |
language |
English |
topic |
Detecção remota Dinâmica da vegetação Teses de doutoramento - 2008 |
spellingShingle |
Detecção remota Dinâmica da vegetação Teses de doutoramento - 2008 Gouveia, Célia Marina Pedroso, 1970- The role of remote sensing in assessing the impact of climate variability on vegetation dynamics in Europe |
topic_facet |
Detecção remota Dinâmica da vegetação Teses de doutoramento - 2008 |
description |
Tese de doutoramento em Ciências Geofísicas e da Geoinformação (Detecção Remota), apresentada à Universidade de Lisboa através da Faculdade de Ciências, 2008 The study aims at investigating the relationship between climate variability and vegetation dynamics by combining meteorological and remote-sensed information. The vegetation response to both precipitation and temperature in two contrasting areas (Northeastern Europe and the Iberian Peninsula) of the European continent is analysed and special attention is devoted to the impact of the North Atlantic Oscillation (NAO) on the vegetative cycle in the two regions which is assessed taking into account the different land cover types and the respective responses to climate variability. An analysis is performed of the impact of climate variability on wheat yield in Portugal and. the role of NAO and of relevant meteorological variables (net solar radiation, temperature and precipitation) is investigated. Using spring NDVI and NAO in June as predictors, a simple regression model of wheat yield is built up that shows a general good agreement between observed and modelled wheat yield values. The severity of a given drought episode in Portugal is assessed by evaluating the cumulative impact over time of negative anomalies of NDVI. Special attention is devoted to the drought episodes of 1999, 2002 and 2005. While in the case of the drought episode of 1999 the scarcity of water in the soil persisted until spring, the deficit in greenness in 2005 was already apparent at the end of summer. Although the impact of dry periods on vegetation is clearly noticeable in both arable land and forest, the latter vegetation type shows a higher sensitivity to drought conditions. Persistence of negative anomalies of NDVI was also used to develop a procedure aiming to identify burned scars in Portugal and then assess vegetation recovery over areas stricken by large wildfires. The vulnerability of land cover to wildfire is assessed and a marked contrast is found between forest and ... |
author2 |
Câmara, Carlos Portugal da, 1957- Trigo, Ricardo M., 1967- |
format |
Doctoral or Postdoctoral Thesis |
author |
Gouveia, Célia Marina Pedroso, 1970- |
author_facet |
Gouveia, Célia Marina Pedroso, 1970- |
author_sort |
Gouveia, Célia Marina Pedroso, 1970- |
title |
The role of remote sensing in assessing the impact of climate variability on vegetation dynamics in Europe |
title_short |
The role of remote sensing in assessing the impact of climate variability on vegetation dynamics in Europe |
title_full |
The role of remote sensing in assessing the impact of climate variability on vegetation dynamics in Europe |
title_fullStr |
The role of remote sensing in assessing the impact of climate variability on vegetation dynamics in Europe |
title_full_unstemmed |
The role of remote sensing in assessing the impact of climate variability on vegetation dynamics in Europe |
title_sort |
role of remote sensing in assessing the impact of climate variability on vegetation dynamics in europe |
publishDate |
2010 |
url |
http://hdl.handle.net/10451/1572 |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_relation |
http://hdl.handle.net/10451/1572 |
op_rights |
openAccess |
_version_ |
1766136512442793984 |