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Servicio de riego mediante Internet y dispositivos móviles. Colegio de Postgraduados
Aguado Rodríguez, Graciano Javier.
Hoy en día existe la tecnología para realizar actividades de manera automática y en tiempo real en diversos campos de la investigación. Entre las aplicaciones más importantes en agricultura destaca la automatización del riego, determinación del momento del riego y cálculo de la lámina de riego necesaria para abastecer al suelo de alguna parcela y llevarlo a tener humedad a capacidad de campo. Por ello en esta investigación se planteó elaborar un sistema integrado que sea capaz de estimar el Contenido Volumétrico de Agua en el Suelo (WVC) de varias parcelas mediante el cálculo de un Balance Hídrico Climático (BHC) a nivel horario con el método de Allen (2006). Adicionalmente, en caso de tener disponibilidad de una red de estaciones meteorológicas, se...
Palavras-chave: Contenido volumétrico de agua en el suelo; Teléfono celular; Variables meteorológicas; Predicción; Interpolación espacial; Volumetric water content in the soil; Cell phone; Meteorological variables; Prediction; Spatial interpolation; Hidrociencias; Doctorado.
Ano: 2013 URL: http://hdl.handle.net/10521/2125
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Assessing Future Ecosystem Services: a Case Study of the Northern Highlands Lake District, Wisconsin Ecology and Society
Peterson, Garry D; McGill University; garry.peterson@mcgill.ca; Beard Jr., T. Douglas; Wisconsin Department of Natural Resources; BEARDT@dnr.state.wi.us; Beisner, Beatrix E; University of Wisconsin-Madison; bebeisner@facstaff.wisc.edu; Bennett, Elena M; University of Wisconsin-Madison; embennett@wisc.edu; Carpenter, Stephen R; University of Wisconsin-Madison; srcarpen@wisc.edu; Cumming, Graeme; University of Florida; cummingg@wec.ufl.edu; Dent, C. Lisa; University of Wisconsin-Madison; ldent@facstaff.wisc.edu,; Havlicek, Tanya D; University of Wisconsin-Madison; TDHAVLIC@students.wisc.edu.
The Northern Highlands Lake District of Wisconsin is in transition from a sparsely settled region to a more densely populated one. Expected changes offer benefits to northern Wisconsin residents but also threaten to degrade the ecological services they rely on. Because the future of this region is uncertain, it is difficult to make decisions that will avoid potential risks and take advantage of potential opportunities. We adopt a scenario planning approach to cope with this problem of prediction. We use an ecological assessment framework developed by the Millennium Ecosystem Assessment to determine key social and ecological driving forces in the Northern Highlands Lake District. From these, we describe three alternative scenarios to the year 2025 in which...
Tipo: Peer-Reviewed Reports Palavras-chave: Northern Highlands Lake District; Wisconsin; Assessment; Ecosystem services; Freshwater; Futures; Prediction; Scenario planning.
Ano: 2003
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Land-use regime shifts: an analytical framework and agenda for future land-use research Ecology and Society
Ramankutty, Navin; Liu Institute for Global Issues; Institute for Resources, Environment, and Sustainability, University of British Columbia; navin.ramankutty@ubc.ca; Coomes, Oliver T.; Department of Geography, McGill University; oliver.coomes@mcgill.ca.
A key research frontier in global change research lies in understanding processes of land change to inform predictive models of future land states. We believe that significant advances in the field are hampered by limited attention being paid to critical points of change termed land-use regime shifts. We present an analytical framework for understanding land-use regime shifts. We survey historical events of land change and perform in-depth case studies of soy and shrimp development in Latin America to demonstrate the role of preconditions, triggers, and self-reinforcing processes in driving land-use regime shifts. Whereas the land-use literature demonstrates a good understanding of within-regime dynamics, our understanding of the drivers of land-use regime...
Tipo: Peer-Reviewed Insight Palavras-chave: Land-cover change; Land-use change; Latin America; Modeling; Prediction; Regime shifts.
Ano: 2016
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MODELING OF DRAFT AND ENERGY REQUIREMENTS OF A MOLDBOARD PLOW USING ARTIFICIAL NEURAL NETWORKS BASED ON TWO NOVEL VARIABLES REA
Al-Janobi,Abdulrahman; Al-Hamed,Saad; Aboukarima,Abdulwahed; Almajhadi,Yousef.
ABSTRACT Draft and energy requirements are the most important factors in the activities of farm machinery management owing to their role in matching the tractor with implements for different tillage operations. This study's aim was to model the draft and energy requirements of a moldboard plow based on two novel variables. The first was the soil texture index (STI), which was formed from the clay, sand, and silt contents with a range of 0.03–0.84. The second variable was the field working index (FWI), formed by combining the plow width, plowing speed, soil bulk density, soil moisture content, plowing depth, and tractor power into one dimensionless variable, which had a range of 7.17–82.45. The coefficient of determination (R2) values obtained using a...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil texture index; Field working index; Artificial neural network; Prediction; Tillage.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162020000300363
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K-NEAREST NEIGHBORS METHOD FOR PREDICTION OF FUEL CONSUMPTION IN TRACTOR-CHISEL PLOW SYSTEMS REA
Al-Dosary,Naji Mordi Naji; Al-Hamed,Saad Abdulrahman; Aboukarima,Abdulwahed Mohamed.
ABSTRACT Most important farm operations require a significant amount of energy, and this consumes a major portion of the farm's budget. Consequently, analyzing the fuel consumption of agricultural machinery for farm operations of different sizes makes it possible to predict fuel consumption to set an appropriate budget for energy. The main purpose of this study was to determine the ability of the k-nearest neighbors (KNN) algorithm to predict the fuel consumption of tractor–chisel plow systems correctly. A training-set design of 139 points of 173 data points obtained from the literature was utilized, and the remaining 34 data points were applied as a test set. The input parameters were tractor power, plowing width, depth and speed of plowing, soil...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Machine-learning algorithms; Tillage; Prediction; K-nearest neighbors; Fuel consumption; Chisel plow.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162019000600729
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Prediction of hybrid means from a partial circulant diallel table using the ordinary least square and the mixed model methods Genet. Mol. Biol.
Reis,Américo José dos Santos; Chaves,Lázaro José; Duarte,João Batista; Brasil,Edward Madureira.
By definition, the genetic effects obtained from a circulant diallel table are random. However, because of the methods of analysis, those effects have been considered as fixed. Two different statistical approaches were applied. One assumed the model to be fixed and obtained solutions through the ordinary least square (OLS) method. The other assumed a mixed model and estimated the fixed effects (BLUE) by generalized least squares (GLS) and the best linear unbiased predictor (BLUP) of the random effects. The goal of this study was to evaluate the consequences when considering these effects as fixed or random, using the coefficient of correlation between the responses of observed and non-observed hybrids. Crossings were made between S1 inbred lines from two...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Diallel analysis; BLUP; Prediction; Cross-validation.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572005000200023
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Determining the pathogenicity of CFTR missense variants: Multiple comparisons of in silico predictors and variant annotation databases Genet. Mol. Biol.
Michels,Marcus; Matte,Ursula; Fraga,Lucas Rosa; Mancuso,Aline Castello Branco; Ligabue-Braun,Rodrigo; Berneira,Elias Figueroa Rodrigues; Siebert,Marina; Sanseverino,Maria Teresa Vieira.
Abstract Pathogenic variants in the Cystic Fibrosis Transmembrane Conductance Regulator gene (CFTR) are responsible for cystic fibrosis (CF), the commonest monogenic autosomal recessive disease, and CFTR-related disorders in infants and youth. Diagnosis of such diseases relies on clinical, functional, and molecular studies. To date, over 2,000 variants have been described on CFTR (~40% missense). Since few of them have confirmed pathogenicity, in silico analysis could help molecular diagnosis and genetic counseling. Here, the pathogenicity of 779 CFTR missense variants was predicted by consensus predictor PredictSNP and compared to annotations on CFTR2 and ClinVar. Sensitivity and specificity analysis was divided into modeling and validation phases using...
Tipo: Info:eu-repo/semantics/article Palavras-chave: CFTR; Missense variant; Prediction; Bioinformatics; Cystic fibrosis.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572019000400560
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Predicting performance of soybean populations using genetic distances estimated with RAPD markers Genet. Mol. Biol.
Barroso,Paulo Augusto Vianna; Geraldi,Isaias Olívio; Vieira,Maria Lúcia Carneiro; Pulcinelli,Carlos Eduardo; Vencovsky,Roland; Dias,Carlos Tadeu dos Santos.
In order to verify whether genetic distance (GD) is associated with population mean (PM), genetic variance (GV) and the proportion of superior progenies generated by each cross in advanced generations of selfing (PS), the genetic distances between eight soybean lines (five adapted and three non-adapted) were estimated using 213 polymorphic RAPD markers. The genetic distances were partitioned according to Griffing's Model I Method 4 for diallel analysis, i.e., GDij = GD+ GGDi+ GGDj + SGDij. Phenotypic data were recorded for seed yield and plant height for 25 out of 28 populations of a diallel set derived from the eight soybean lines and evaluated from F2:8 to F2:11 generations. No significant correlation for seed yield was detected between GD and GV, while...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Soybean; Genetic distance; Molecular markers; RAPD; Prediction.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572003000300020
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Estimation of 90Sr and 137Cs transfer from the Black Sea to the Mediterranean Basin after the Chernobyl NPP accident IBSS Repository
Egorov, V. N.; Polikarpov, G. G.; Stokozov, N. A.; Mirzoyeva, N. Yu..
The 90Sr and 137Cs inputs from the Black Sea to the Mediterranean Basin through the Bosporus Strait after the Chernobyl NPP accident were estimated. It is obtained that the 90Sr and 137Cs fluxes from the Black Sea to the Sea of Marmara are decreased with an effective exponential half-lives (T05) 9.5 years and 6.4 years, respectively. The estimations have shown that 110 TBq 90Sr and 250 TBq 137Cs in 1986-2000 was delivered from the Black Sea to the Mediterranean Basin after the Chernobyl NPP accident. The radioactive pollution of the Mediterranean Basin will continue for 5 half-lives, i.e. 47 years for 90Sr and 32 years for 137Cs. The total 90Sr and l37Cs inputs from the Black Sea into the Mediterranean Basin have been assessed as 168 TBq and 311 TBq,...
Tipo: Journal Contribution Palavras-chave: Сhernobyl NPP accident; 90Sr and 137Cs fluxes; Prediction; The Bosporus currents; Black Sea; Mediterranean Basin; Авария на Чернобыльской АЭС; Потоки 90Sr и 137Cs; Прогноз; Босфорское течение; Черное море; Средиземноморский бассейн Prediction Prediction http://aims.fao.org/aos/agrovoc/c_29367.
Ano: 2005 URL: http://repository.ibss.org.ua/dspace/handle/99011/243
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Sur l'utilisation des criteres comportementaux pour determiner l'etat de sante et l'evolution probable des elevages de poissons marins. 1: Cas des prelarves et des larves de Diplodus sargus, Sparus aurata, Puntazzo puntazzo, Lithognatus mormyrus ArchiMer
Kentouri, M; Divanach, P.
In aquaculture and particularly during fish larval rearing when the time between moment of stress application and the non-return point acquisition is very limited, criteria which may provide health state and stock evolution are of great importance. Now, in stress responce chronology, the specific behavioral scheme modification is first noted. This early identification, associated with initial conditions restoration, generaly do not involve after effects. Ethological knowledge beeing the basis of this for-casting strategy, the authors define in this study a simplified behavioral scheme of four sparid larval species in a range of physiological conditions.
Tipo: Text Palavras-chave: Lithognathus mormyrus; Puntazzo puntazzo; Sparus aurata; Diplodus sargus; Sparidae; Pisces; Prediction; Biological stress; Ethology; Fish larvae; Pathology.
Ano: 1983 URL: http://archimer.ifremer.fr/doc/1983/acte-1255.pdf
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Hazard warning: model misuse ahead ArchiMer
Dickey-collas, Mark; Payne, Mark R.; Trenkel, Verena M.; Nash, Richard D. M..
The use of modelling approaches in marine science, and in particular fisheries science, is explored. We highlight that the choice of model used for an analysis should account for the question being posed or the context of the management problem. We examine a model-classification scheme based on Richard Levins' 1966 work suggesting that models can only achieve two of three desirable model attributes: realism, precision, and generality. Model creation, therefore, requires trading-off of one of these attributes in favour of the other two: however, this is often in conflict with the desires of end-users (i.e. mangers or policy developers). The combination of attributes leads to models that are considered to have empirical, mechanistic, or analytical...
Tipo: Text Palavras-chave: Climate; Fisheries; GAM; Management; Prediction; Projection; Recruitment; Time-series analysis.
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00222/33371/32179.pdf
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Strong Indian Ocean sea surface temperature signals associated with the Madden-Julian Oscillation in late 2007 and early 2008 ArchiMer
Vialard, Jerome; Foltz, G. R.; Mcphaden, M. J.; Duvel, J. P.; De Boyer Montegut, Clement.
A moored buoy was recently deployed at 8 degrees S, 67 degrees E in the shallow thermocline region of the Indian Ocean known as "Seychelles-Chagos Thermocline Ridge'' (SCTR), where the Madden Julian Oscillation (MJO) is associated with strong sea surface temperature (SST) variability. We use observations from this mooring to describe the oceanic signature of two MJOs between November 2007 and February 2008. The four-month average upper ocean heat balance was largely between heating by atmospheric forcing (2.0 +/- 0.3 degrees C/month) and a significant cooling by subsurface processes (-2.2 +/- 0.8 degrees C/month), consistent with climatological Ekman pumping in the region. The two MJO events resulted in strong intraseasonal SST variations (1.5 to 2 degrees...
Tipo: Text Palavras-chave: Layer heat balance; Paific; Perturbations; Prediction; Fluxes.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/00185/29636/27988.pdf
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Yield stress changes induced by water in polyamide 6: Characterization and modeling ArchiMer
Le Gac, Pierre-yves; Arhant, Mael; Le Gall, Maelenn; Davies, Peter.
This paper considers the effect of water content on mechanical properties of polyamide 6 when used in a humid environment. First an experimental section presents the tensile behavior of polyamide with different amounts of water, with and without a through-thickness water gradient. Water profiles are introduced by immersion in sea water at 25 °C. The effect of testing temperature is also investigated in order to consider the influence of macromolecular chain mobility on the mechanical behavior. Then, in a second section, modelling of yield stress is proposed based on physical considerations. This can be used for life time prediction of PA6 in humid environment when plasticization is the main degradation mechanism.
Tipo: Text Palavras-chave: Yield stress; Water; Polyamide; Plasticization; Prediction.
Ano: 2017 URL: http://archimer.ifremer.fr/doc/00371/48208/48321.pdf
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Prediction of faecal contamination in shellfish production areas: Interest and limits of the salinity parameter ArchiMer
Le Saux, Jean-claude; Le Vaillant, Gael; Guillermou, Ghislain; Vilbas, Jean-valere; Deter, Julie; Delyon, Bernard; Le Guyader, Soizick; Pommepuy, Monique.
Estuarine areas are sensitive to rapid and punctual contamination linked to heavy rainfall inducing rapid fresh water input. Thus, the increase of seawater contamination may be linked to a salinity decrease. The objective of this study was to measure salinity variation as a proxy to evaluate the risk of faecal contamination. Salinity sensors were set up on shellfish beds in Daoulas estuary (Bay of Brest) and monitored every 10 min over a four year period. Precipitation and river flows were also recorded. Moreover E. coli concentrations and salinity were measured in the estuarine surface water during different hydrodynamic conditions and seasons. The results indicated a significant relationship between E. coli concentration and salinity in the estuary....
Tipo: Text Palavras-chave: Salinity; Sensor; E. coli; Shellfish; Prediction; Alert; Daoulas estuary.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/00066/17751/15273.pdf
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Modélisation biophysique pour la prévision du recrutement ArchiMer
Allain, Gwenhael.
Exploited fish populations are dependent on recruitment (i.e. size of the new year class) to sustain their abundance. Recruitment variations are related to hydroclimatic variations and may accentuate the detrimental effects of fishing. Recruitment prediction requires accurate fisheries oceanographic tools, which are expected to be more reliable than large-scale correlation analyses between fish abundance and climate variables. Recruitment is the result of the integration over a season and large oceanic areas of processes affecting larval survival, which are dependent on small-scale mechanisms. Hydrodynamic models are a tool to perform this integration. This thesis aims at exploring and modelling physical-biological interaction mechanisms in order to...
Tipo: Text Palavras-chave: Anchovy; Upwelling; Turbulence; Retention; Fisheries management; Population dynamics; Stock environment interaction; Stock recruitment relation; Scale integration; Individual based models; Survival; Growth; Otolith; Physical biological interactions; Prediction; Recruitment; Turbulence; Rétention; Méso échelle; Intégration des échelles; Modèle de survie; Modèle de ponte; Modèles individu centrés; Modèles de corrélation; Modèles stochastiques; Juvéniles; Larves; Otolithe; Modèle de croissance; Interactions physique biologie; Prévision; Recrutement.
Ano: 2004 URL: http://archimer.ifremer.fr/doc/2004/these-5.pdf
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Stature and its Estimation Utilizing Arm Span Measurements in Kosovan Adults: National Survey International Journal of Morphology
Arifi,Fitim; Bjelica,Dusko; Sermaxhaj,Sami; Gardasevic,Jovan; Kezunovic,Miroslav; Popovic,Stevo.
The purpose of this research is to examine stature in both Kosovan sexes as well as its association with arm span, as an alternative to estimating stature. A total of 1623 individuals (830 boys and 793 girls) participated in this research. The anthropometric measurements were taken according to the protocol of ISAK. The relationships between stature and arm span were determined using simple correlation coefficients at a ninety-five percent confidence interval. Then a linear regression analysis was carried out to examine extent to which arm span can reliably predict stature. Results displayed that Kosovan boys are 179.52±5.96 cm tall and have an arm span of 181.29±7.02 cm, while Kosovan girls are 165.72±4.93 cm tall and have an arm span of 165.60±5.87 cm....
Tipo: Journal article Palavras-chave: Prediction; Measurement; Body Height; Arm Span; Kosovo.
Ano: 2017 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022017000300055
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Body Height and Its Estimation Utilizing Arm Span Measurements in Serbian Adults International Journal of Morphology
Popovic,Stevo; Bjelica,Dusko; Molnar,Slavko; Jaksic,Damjan; Akpinar,Selcuk.
Anthropologists recognized the tallness of nations in the Dinaric Alps long time ago. As the modern Serbians fall more into the Dinaric racial classification than any other does, the purpose of this study was to examine the body height in Serbian adults as well as the relationship between arm span as an alternative to estimating the body height, which vary in different ethnic and racial groups. The nature and scope of this study analyzes 394 students (318 men, aged 20.13±1.47 and 76 women, aged 19.59±1.46) from the University of Novi Sad to be subjects. The anthropometric measurements were taken according to the protocol of the ISAK. Means and standard deviations were obtained. A comparison of means of body heights and arm spans within each gender group...
Tipo: Journal article Palavras-chave: Prediction; Standing height; Stature; Armspan; Serbia.
Ano: 2013 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022013000100043
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PREDICTION OF BIOAVAILABILITY OF CHLORPYRIFOS RESIDUES IN SOIL TO EARTHWORMS J. Soil Sci. Plant Nutr.
Wu,X.M; Yu,Y.L; Li,M; Long,Y.H; Fang,H; Li,S.N.
An incubation test was conducted to investigate the effect of aging on bioavailability of chlorpyrifos in soil and to assess the feasibility of chemical extraction techniques for predicting bioavailability of chlorpyrifos in soil. Chlorpyrifos was spiked into sterilized soil and aged in microcosms for up to 120 days. The earthworms were incubated in the spiked soils, at 0, 7, 14, 30, 60, and 120 days after spiking, for a period of 7 days. After exposure, chlorpyrifos concentrations in the earthworm tissues were determined. Change in chemical extractability of soil-chlorpyrifos was measured using a several solvent systems including methanol, methanol-water (9:1), acetone-water (5:3), and water. The results show that chemical extractability and earthworm...
Tipo: Journal article Palavras-chave: Chlorpyrifos; Residue; Soil; Earthworm; Bioavailability; Prediction.
Ano: 2011 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162011000100004
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Occurrence of Toxorhynchites guadeloupensis (Dyar & Knab) in oviposition trap of Aedes aegypti (L.) (Diptera: Culicidae) Neotropical Entomology
Honório,Nildimar A.; Barros,Fábio S.M. de; Tsouris,Pantelis; Rosa-Freitas,Maria G..
Toxorhynchites guadeloupensis (Dyar & Knab), a poorly known mosquito species, was observed preying upon Aedes aegypti (L.) larvae, in an oviposition trap placed for routine dengue entomological surveillance, during 2003-2004 in the urban area of Boa Vista, Roraima, Brazil. This is the first report for Tx. guadeloupensis using Ae. aegypti oviposition traps as breeding places. This finding may have important consequences in the epidemiology and local dengue control since Ae. aegypti density is a basic variable in dengue prediction. Whether predation of Ae aegypti by Tx. guadeloupensis in the Amazon is of significance, is a question to be examined. Also, larval predation may be a cause for underestimation of the actual Ae aegypti numbers. Together...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Predation; Dengue; Prediction; Control; Immature form.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2007000500025
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Climate warming and sea level rise. OceanDocs
Yue, Jun; Dong, Yue; Wu, Sangyun; Geng, Xiushan; Zhao, Changrong.
Based on a large number of actual data, the author believe that the modern global warming and sea level rise resulted from climate warming after the cold front of the Little Ice Age about 200 years ago and the developmnet of the sea level rise phase. In the past 30 years, the rate of sea level rise was increasing, which is under the background of the average temperature uplift 0.2F°(0.11 °C)every 10 years in succession from the 1980s to the past 10 years this century. On the basis of the absolute and relative sea-level rise rate that was calculated from the tidal data during the same period at home and abroad in the last 30 years, in accordance with the resolutions of the 2010 climate conference in Cancun, at the same time, considering the previous...
Tipo: Journal Contribution Palavras-chave: Global warming; Sea level variations; Prediction; Evaluation.
Ano: 2012 URL: http://hdl.handle.net/1834/5832
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