Acompanhamento da construção de uma captação de água subterrânea

Tese de mestrado, Geologia Aplicada (Hidrogeologia) Universidade de Lisboa, Faculdade de Ciências, 2016

REACHING FOR BLUE GOLD - How the EU can rise to the water challenge while reaping the rewards. EPC Issue Paper No. 80, November 2015

Foreword. Climate change is bad news for water resources – and thus for human development, societies, economies, the environment, and local and global security. The increasing frequency and severity of extreme weather events such as droughts and floods serves as a reminder of the effects climate change can have on the quantity and quality of global water reserves, and thus on various other aspects of life. Even though the effects differ from region to region, this is a global challenge with far-reaching consequences to which Europe is not immune. As the world leaders gather in Paris in December 2015 to discuss a new international climate deal, it is worth to remind politicians, businesses and citizens of the water challenge and its wider implications, which already affect us today – and which will only get worse with climate change. However, water-related risks resulting from climate change are not a fatality and damage control doesn’t have to be the only mantra. Placing the water challenge at the centre of political and security dialogues, development strategies and climate mitigation and adaptation measures, and implementing smarter water management, could also bring great economic, environmental and social benefits, in and outside the European Union. It would also contribute to global security. Water matters – now more than ever. This is also what this publication demonstrates. Building on the European Policy Centre’s, two-year “Blue Gold” project, this publication shows the rationale for action, how the EU could use its existing internal and external policy instruments to tackle the water challenge with its various dimensions and the benefits of action.

Financial risks and opportunities in the time of climate change. Bruegel Policy Brief ISSUE 2016/02 APRIL 2016

Real economic imbalances can lead to financial crisis. The current unsustainable use of our environment is such an imbalance. Financial shocks can be triggered by either intensified environmental policies, cleantech breakthroughs (both resulting in the stranding of unsustainable assets), or the economic costs of crossing ecological boundaries (eg floods and droughts due to climate change). Financial supervisors and risk managers have so far paid little attention to this ecological dimension, allowing systemic financial imbalances resulting from ecological pressures to build up. Inattention also leads to missed economic and financial opportunities from the sustainability transition.

Alkenone data of sediment core GeoB9508-5 from the continental slope off Senegal

In order to investigate a possible link between tropical Northeast (NE) Atlantic sea-surface temperature (SST), Atlantic meridional overturning circulation (AMOC), and drought in the Sahel during the past 44 thousand years (kyr) we used alkenone paleothermometry and d13C of C. wuellerstorfi of a marine sediment core from the continental slope off Senegal. Our data show periods of low SST and reduced AMOC that coincided with drought in the Sahel during North Atlantic Heinrich stadials (HS). The coldest period was HS1 (ca. 15-18 kyr before present, BP) when SST decreased by more than 2°C. Moreover, the SST off Senegal lagged variations in Sahel aridity, which is in agreement with results from a freshwater hosing experiment. We conclude that variations in tropical NE Atlantic SST were not the initial trigger of millennial-scale Sahel droughts of the past 44 kyr. Instead, it is thought that these droughts were induced by substantial coolings of the extratropical North Atlantic.

Sedimentology on a core from Lonar Lake in India

Concerns about the regional impact of global climate change in a warming scenario have highlighted the gaps in our understanding of the Indian Summer Monsoon (ISM, also referred to as the Indian Ocean summer monsoon) and the absence of long term palaeoclimate data from the central Indian core monsoon zone (CMZ). Here we present the first high resolution, well-dated, multiproxy reconstruction of Holocene palaeoclimate from a 10 m long sediment core raised from the Lonar Lake in central India. We show that while the early Holocene onset of intensified monsoon in the CMZ is similar to that reported from other ISM records, the Lonar data shows two prolonged droughts (PD, multidecadal to centennial periods of weaker monsoon) between 4.6-3.9 and 2-0.6 cal?ka. A comparison of our record with available data from other ISM influenced sites shows that the impact of these PD was observed in varying degrees throughout the ISM realm and coincides with intervals of higher solar irradiance. We demonstrate that (i) the regional warming in the Indo-Pacific Warm Pool (IPWP) plays an important role in causing ISM PD through changes in meridional overturning circulation and position of the anomalous Walker cell; (ii) the long term influence of conditions like El Niño-Southern Oscillation (ENSO) on the ISM began only ca. 2 cal?ka BP and is coincident with the warming of the southern IPWP; (iii) the first settlements in central India coincided with the onset of the first PD and agricultural populations flourished between the two PD, highlighting the significance of natural climate variability and PD as major environmental factors affecting human settlements.

A precipitation climatology for stations in the tropical Pacific basin : effects of ENSO /

"February 1998."

A Sêcca de 1919 ;

At head of title: O maior problema economico nacional.

The California drought, 1977 : an update /

Mode of access: Internet.

The continuing California drought

Mode of access: Internet.

The drought of 1934; the federal government's assistance to agriculture ....

Typewritten or printed.

Effects of the drought on Georgia farmers and the agricultural economy [microform] : hearing before the Committee on Agriculture, Nutrition, and Forestry, United States Senate, Ninety-sixth Congress, second session, September 16, 1980.

CIS Microfiche Accession Numbers: CIS 81 S161-14