Patrícia Páscoa

Instituto Português do Mar e da Atmosfera | IPMA

Land degradation is recognized as an important environmental and social problem in arid and semi-arid regions, particularly within a climate change context. In the last three decades the entire Mediterranean basin has been affected by more frequent droughts, covering large sectors and often lasting more than one year. The Iberian Peninsula has been...

The production of wheat in the Iberian Peninsula is strongly affected by climate conditions being particularly vulnerable to interannual changes in precipitation and long-term trends of both rainfall and evapotranspiration. Recent trends in precipitation and temperature point to an increase in dryness in this territory, thus highlighting the need t...

The Iberian Peninsula (IP) is a drought-prone area located in the Mediterranean which presents a significant tendency towards dryness during the last decades, reinforcing the need for a continuous monitoring of drought. The long-term evolution of drought in the IP is analyzed, using the Standardized Precipitation Evaporation Index (SPEI) and the St...

A previously developed procedure that aims at monitoring the process of vegetation recovery in areas afected by major fire episodes is revisited and assessed in terms of consistency and robustness. The procedure is based on 10-day fields of Maximum Value Composites of the Normalised Difference Vegetation Index (MVC-NDVI). The identification of fire...

The potential groundwater-dependent vegetation (pGDV) in the Iberian Peninsula (IP) was mapped, with a simple method, hereafter referred to as SRS-pGDV, that uses only Normalized Difference Vegetation Index (NDVI) time series retrieved from the Moderate-Resolution Imaging Spectroradiometer (MODIS) Terra V6 product, covering the period February 2000...

Mediterranean European countries, including Portugal, are considered fire-prone regions, being affected by fire events every summer. Nonetheless, Portugal has been recording large burned areas over the last 20 years, which are not only strongly associated with hot and dry conditions, but also with high fuel availability in the ecosystems. Due to re...

The compound occurrence of extreme weather and/or climate events can cause stronger negative impacts than the individual events, and its frequency is increasing in several regions of the world. In this work, the effect of antecedent drought conditions on hot extremes during the months of December to February in Australia was analysed for two period...

Droughts are a long-term weather-driven extreme event which occurs worldwide with great socio-economic impacts, namely in the Mediterranean and the Iberian regions. In a changing climate with rising temperatures, extreme events, such as droughts, are expected to increase in frequency and intensity, particularly in Mediterranean climates. In this co...

The interaction between co-occurring drought and hot conditions is often particularly damaging to crop's health and may cause crop failure. Climate change exacerbates such risks due to an increase in the intensity and frequency of dry and hot events in many land regions. Hence, here we model the trivariate dependence between spring maximum temperat...

We evaluated the response of vegetation’s photosynthetic activity to drought conditions from 1998 to 2014 over Romania and the Republic of Moldova. The connection between vegetation stress and drought events was assessed by means of a correlation analysis between the monthly Standardized Precipitation Evaporation Index (SPEI), at several time scale...

The occurrence of extreme climate events such as droughts and heatwaves can have negative economic, environmental and social impacts. The simultaneous or sequential occurrence of these extreme events can increase these impacts, and their frequency is expected to increase in many regions of the world. Moreover, the occurrence of hot days/nights was...

Crop health and favourable yields depend strongly on precipitation and temperature patterns during the crop’s growing season. Compound events, such as co-occurring drought and heat can lead to extreme crop failure and cause larger damages than the impacts of the individual drought or heat alone. Here we assess the relative role of hot and dry condi...

Abstract. Drought and heat events stress agricultural systems and may threaten food security. The interaction between co-occurring drought and hot conditions is often particularly damaging to crop's health and may cause crop failure. In this context, traditional univariate analyses may not be adequate for reliable risk assessment of crop failure as...

The IMPECAF is a research project that started at the end of 2018 and aims to deepen the knowledge on weather extremes, particularly droughts and heat waves, which affect agricultural and forest ecosystems of the Iberian Peninsula. Despite these events presenting different temporal scales, their simultaneous occurrence can intensify the observed im...

Extreme weather events, such as droughts, have been increasingly affecting the agricultural sector, causing several socioeconomic consequences. The growing economy requires improved assessments of drought-related impacts in agriculture, particularly under a climate that is getting drier and warmer. This work proposes a probabilis-tic model that is...

In the context of sustainable agricultural management, drought monitoring plays a crucial role in assessing the vulnerability of agriculture to drought occurrence. Drought events are very frequent in the Iberian Peninsula (and in Portugal in particular), and an increase in frequency of these extreme events are expected in a very near future. Theref...

In a future climate, warmer and drier conditions are expected, and the associated negative impacts in agricultural productions are a major issue. Assessing the risk of drought hazard on agricultural systems is, therefore, of main importance in decision-making, with the aim of mitigating drought-related crop losses. In this study the agricultural dr...

In the context of sustainable agricultural management, drought monitoring plays a crucial role assessing the vulnerability of agriculture to drought occurrence. Drought events are very frequent in the Iberian Peninsula (and in Portugal in particular) and an increase of frequency of these extreme events are expected in a very near future. Therefore,...

The response of two rainfed winter cereal yields (wheat and barley) to drought conditions in the Iberian Peninsula (IP) was investigated for a long period (1986–2012). Drought hazard was evaluated based on the multiscalar Standardized Precipitation Evapotranspiration Index (SPEI) and three remote sensing indices, namely the Vegetation Condition (VC...

APPLICATION OF COPULAS TO AGRICULTURAL DROUGHT RISK MANAGEMENT

Extreme weather events, such as droughts, have been increasingly affecting the agricultural sector causing several socio-economic consequences. The growing economy requires improved assessments of drought-related impacts in agriculture, particularly under a climate that is getting drier and warmer. This work proposes a probabilistic model which int...

In this work, the impacts of drought events on vegetation activity in the period 1998-2014 were analysed, on an area located in southeastern Europe, using the Standardized Precipitation Evaporation Index (SPEI) at several time scales, and the Normalized Difference Vegetation Index (NDVI), as obtained by SPOT/VEGETATION. A correlation analysis betwe...

Southern European countries are particularly affected by summer wildfires and drought events. The occurrence of extreme meteorological conditions during preceding and contemporaneous months amplifies the risk of summer wildfires. The main scope of this study was to investigate the impact of drought periods on burned areas in the Iberian Peninsula....

The Southwest Mediterranean is often affected by extreme events. Particularly, severe drought events, which in the last decades faced an increased likelihood due to the higher atmospheric evaporative demand. On the other hand, Europe has also experienced multiple and unprecedented mega heat waves, namely over Western Europe in 2003 and Eastern Euro...

Download: http://hdl.handle.net/10316/29367 This paper deals with numerical and experimental investigation of a gully under exceptional situations after the sewer system becomes pressurized. These results are useful for the calibration and validation of the linking elements found in Dual Drainage (DD) models. The experimental results were obtained...

The Iberian Peninsula is often affected by drought events with strong influences in ecosystems and the related social and economic impacts (Gouveia et al. 2012, Trigo et al., 2013). In the last decades the severity of droughts in Iberia have increased due to the higher atmospheric evaporative demand (Vicente-Serrano et al., 2014). The need for a de...

This experimental research aims to investigate a real-scale system comprising both surface and sewer drainage under different flows, namely the effects of a linking element gully – drop manhole on the flow. This work focus on a detailed laboratory study carried out on a new laboratory installation termed the Dual Drainage and Multi Link Element ins...