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| Registros recuperados: 28 | |
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| Aoki, I; Komatsu, T. |
| This paper examines the use of a neural network to analyse and predict the winter catch, in the Joban-Boso Seas off the Pacific coast of central Japan, of young Japanese sardine (Sardinops melanostictus) representing the index of recruits in the sardine stock. The supervised learning paradigm, a three-layer network and a back-propagation algorithm were employed in constructing the neural net. A number of biological, hydrographic and climatic factors constituted an input vector, the output being the catch of young sardine. The association of sardine abundance with environmental factors was quantified in the form of the trained neural network, which indicated important associations with the Southern Oscillation Index, with patterns of the Kuroshio and the... |
| Tipo: Text |
Palavras-chave: Neural network; Japanese sardine; Recruit; Climatic change; Kuroshio-Oyashio. |
| Ano: 1997 |
URL: http://archimer.ifremer.fr/doc/00093/20436/18103.pdf |
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| Sierro, Fj; Hodell, Da; Curtis, Jh; Flores, Ja; Reguera, I; Colmenero-hidalgo, E; Barcena, Ma; Grimalt, Jo; Cacho, I; Frigola, J; Canals, M. |
| Down-core samples of planktonic and benthic foraminifera were analyzed for oxygen and carbon isotopes in International Marine Past Global Changes Study (IMAGES) core MD99-2343 in order to study the interactions between climate change in the Northern Hemisphere and the western Mediterranean thermohaline circulation at times of Heinrich events (HE). Our results confirm the antiphase correlation between enhanced North Atlantic Deep Water formation and low ventilation in the Mediterranean. However, this study reveals that this antiphase relationship in deepwater formation between the North Atlantic and Mediterranean was interrupted during times of HE when the injection of large volumes of water from melting icebergs reached the entrance to the Mediterranean.... |
| Tipo: Text |
Palavras-chave: Climatic change; Heinrich events; Mediterranean Sea; Carbon and oxygen isotopes; Thermohaline circulation; Pleistocene. |
| Ano: 2005 |
URL: https://archimer.ifremer.fr/doc/00232/34354/32759.pdf |
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| Saenz-romero, Cuauhtemoc; Lamy, Jean-baptiste; Ducousso, Alexis; Musch, Brigitte; Ehrenmann, Francois; Delzon, Sylvain; Cavers, Stephen; Chalupka, Wladyslaw; Dagdas, Said; Hansen, Jon Kehlet; Lee, Steve J.; Liesebach, Mirko; Rau, Hans-martin; Psomas, Achilleas; Schneck, Volker; Steiner, Wilfried; Zimmermann, Niklaus E.; Kremer, Antoine. |
| How temperate forests will respond to climate change is uncertain; projections range from severe decline to increased growth. We conducted field tests of sessile oak (Quercus petraea), a widespread keystone European forest tree species, including more than 150,000 trees sourced from 116 geographically diverse populations. The tests were planted on 23 field sites in six European countries, in order to expose them to a wide range of climates, including sites reflecting future warmer and drier climates. By assessing tree height and survival, our objectives were twofold: (1) to identify the source of differential population responses to climate (genetic differentiation due to past divergent climatic selection versus plastic responses to ongoing climate... |
| Tipo: Text |
Palavras-chave: Climatic change; Climatic transfer distance; Mixed model; Quercus petraea; Survival; Tree growth. |
| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00358/46967/46882.pdf |
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| Thiaw, Modou; Auger, Pierre-amael; Ngom, Fambaye; Brochier, Timothee; Faye, Saliou; Diankha, Ousmane; Brehmer, Patrice. |
| The objective of this study was to assess the effect of environmental variations on the abundance of Sardinella aurita and Sardinella maderensis in Senegalese waters in the upwelling system. Monthly data indicating the abundance of sardinella were first estimated from commercial statistics, using Generalized Linear Model from 1966 to 2011. Abundance indices (AIs) were then compared with environmental indices, at the local scale, a Coastal Upwelling Index (CUI) and a coastal Sea Surface Temperature (SST) index, and on a large scale, the North Atlantic Oscillation (NAO), the Atlantic Multidecadal Oscillation (AMO) and the Multivariate El Nino Southern Oscillation Index (MEI), using correlations and times series analyses. The results showed that the abundance... |
| Tipo: Text |
Palavras-chave: Climatic change; Oceanography; Sardinella aurita; Sardinella maderensis; Small pelagic; Small-scale fisheries. |
| Ano: 2017 |
URL: https://archimer.ifremer.fr/doc/00611/72307/71213.pdf |
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| Morais, Vinícius Augusto; Silva, Carlos Alberto; Scolforo, José Roberto Soares; Mello, José Márcio; Araújo, Emanuel José Gomes de; Assis, Edson Aquiles de. |
| The total soil organic carbon (C) is regulated by climatic factors, altitude, texture and soil depth. Due to higher storage in surface, it is common to observe the exponential model to adjust the C content in the soil profile. This study was carried out in order to study the influence of climatic factors, altitude and soil depth on the vertical distribution (0-100 cm) of C in five Cerrado fragments located in the municipalities of Januária and Bonito de Minas, Minas Gerais State, Brazil. Soil samples were collected in the following layers: 0-10, 10-20, 20-40, 40-60 and 60-100 cm. The maximum and minimum levels of C varied depending on the sampling site, fragment and soil layer sampled. Larger variations in the levels of C were noted for the 0-10 cm layer,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Climatic change; Root; Litter; Total organic carbon Recursos Florestais; Engenharia Florestal; Manejo Florestal Mudanças climáticas; Raiz; Serrapilheira; Carbono orgânico total. |
| Ano: 2013 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/507 |
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| Suwanabatr, Bhibhatra; Mekhora, Thamrong. |
| This study focused on the impacts on vulnerable areas in five provinces and five regions in Thailand. The findings indicated that events caused by El Nino induced weather changes had some impacts on the stabilization of upland agriculture in those vulnerable areas. Broadly speaking, severe drought and a long period of water shortages were experienced by some of the vulnerable areas in Northeast and Central Thailand. Some areas experienced a decrease of corn yield while others experienced complete failure of field corn, sorghum, sugarcane, peanut and mungbean. The impacts of El Nino on the social and economic conditions of Thailand's vulnerable areas were an occurrence of labour mobilization, and weaknesses in purchasing power and loan repayment abilities... |
| Tipo: Report |
Palavras-chave: Climatic change; Upland areas; Environmental policies; Environmental Economics and Policy. |
| Ano: 2002 |
URL: http://purl.umn.edu/32670 |
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| Monsalud, Florentino C.; Montesur, Jaime G.; Abucay, Edwin R.. |
| The occurrence of El Nino causes tremendous havoc to economies. Recognizing this problem, the Philippine government has been introducing measures to mitigate the impact of the El Nino phenomenon. One of the measures to lessen the vulnerability of the farmers on El Nino related risk is the Small Water Impounding Projects (SWIPs). Furthermore, farmers have their own initiatives and coping mechanisms to mitigate the effects of El Nino. This research was undertaken to document the coping mechanisms, which would be useful in policy formulation. This study aims to: a) Determine the impacts of El Nino-related abnormal weather changes on agricultural production and farmers' income; b) Document the existing farming systems, resources, infrastructure, institutions,... |
| Tipo: Report |
Palavras-chave: Climatic change; Farmers; Rural communities; Environmental Economics and Policy. |
| Ano: 2003 |
URL: http://purl.umn.edu/32717 |
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| Mekhora, Thamrong. |
| This second phase of the study is expected to produce actual and accurate information concerning socio-economic information and measures to cope with the El Nino effects at the farm level. Evidence of abnormal weather was apparent in Thailand in 2001 when the rain was less than the previous years' and the high temperatures were from January to March 2002. However, the rain came early in May 2002. Thus, the period of 2001 is suitable to represent an abnormal year for the study of the second phase of the project. The objectives of the second phase are to analyze and evaluate drought impacts at farm-household level, farmer's responses and government measures to overcome the problems. The research was conducted in two different provinces, namely Lop Buri in... |
| Tipo: Report |
Palavras-chave: Drought; Climatic change; Agriculture; Environmental Economics and Policy. |
| Ano: 2003 |
URL: http://purl.umn.edu/32672 |
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| Irawan, Bambang. |
| This study is the second phase of the El Nino study which was undertaken by the CGPRT Centre in five vulnerable countries namely, Indonesia, Malaysia, the Philippines, Thailand and Papua New Guinea. The first phase of the El Nino study did not fully reveal the extent of El Nino impacts on production at the farm level, what efforts are undertaken by farmers to reduce possible production decline and what constraints are faced by farmers to implement efficient coping mechanisms. El Nino impacts on household food security, mitigation efforts applied by farmers to overcome their consumption problems and the role of local institutions or the local government in handling the consequences of El Nino were also neglected by the first phase of the study. Accordingly,... |
| Tipo: Report |
Palavras-chave: Climatic change; Food crops; Food production; Crop Production/Industries; Environmental Economics and Policy. |
| Ano: 2003 |
URL: http://purl.umn.edu/32714 |
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| Tawang, Ariffin; Tengku Ahmad, Tengku bin Ariff. |
| This study is an extension of the earlier study with a focus on the impact of the El Nino induced weather changes at the regional and farm levels. It provides a complete continuum of the impacts and implications of El Nino from the national to the regional and farm levels. Hence, the general objective of the study is to determine the impact of El Nino induced climate variability on agriculture at the sub-national and farm level, and to identify appropriate mechanisms to mitigate the impact so as to ensure the stability of the agricultural contribution to the regional and farm economy. In this study, the northwest region of Peninsular Malaysia was chosen as the region under study. It comprises of the states of Kedah and Perlis. The main climatic feature of... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Climatic change; Risk; Agricultural products; Environmental Economics and Policy; Risk and Uncertainty. |
| Ano: 2003 |
URL: http://purl.umn.edu/32695 |
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| Monsalud, Florentino C.; Montesur, Jaime G.; Abucay, Edwin R.. |
| This study focuses on the impacts of El Nino induced abnormal weather on agricultural productivity in rainfed areas and on the coping mechanisms and risk management strategies from the national down to the household level. This study was conducted to: a) Determine the impacts of El Nino-related abnormal weather changes on production of selected crops; b) Document and analyze the existing conditions on rainfed farming systems, resources, infrastructure, institutions, and other socio-economic characteristics associated with El Nino vulnerable areas; c) Review existing policies related to El Nino; d) Draw up recommendations for the stabilization of rainfed agricultural production. The major sources of data were reports of studies related to El Nino, on-farm... |
| Tipo: Report |
Palavras-chave: Climatic change; Plant production; Rain fed farming; Crop Production/Industries; Environmental Economics and Policy. |
| Ano: 2003 |
URL: http://purl.umn.edu/32690 |
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| Registros recuperados: 28 | |
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