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| Registros recuperados: 69 | |
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| Dandonneau, Yves. |
| The chlorophyll concentration at the surface of the tropical Pacific has been monitored through the 1982-83 ENSO, owing to the SURTROPAC ships of opportunity network. The event was characterized by a decrease in chlorophyll concentrations at the equator, where a belt of relatively rich water however persisted. The most striking anomaly was observed in the western Pacific between 5°N and 15°N. In this region, chlorophyll at the surface is generally less than O.O7 mg m-3, caused by a mixed layer exhausted in nutrients and by strong density gradient in the thermocline. From october 1982 to march 1983, higher concentrations up to 0.70 mg m-3 have been recorded by the network. This is consistent with the shallowing of the thermocline which characterizes all... |
| Tipo: Text |
Palavras-chave: PHYTOPLANCTON; ANOMALIE; CONCENTRATION; ENSO; 1982 1983. |
| Ano: 1989 |
URL: http://www.documentation.ird.fr/hor/fdi:30264 |
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| Meyers, G.; Bailey, R.; Lindstrom, E.; Phillips, H.. |
| The Southern Oscillation Index (SOI), equatorial zonal wind, sea level anomalies at islands, sea surface temperature at Puerto Chicama Peru and mixed layer temperature and depth from the XBT ship of opportunity network are used to describe conditions during the past two ENSO episodes. Onset of sustained ENSO anomalies in the 1986/87 episode was in July 1986, one month later in the year onset of the 1982/83 episode in June 1982. Both episodes of the 1980's the usual surface temperature difference along the equator between 165°W and 160°E reversed and rapidly increased to 1°C in the order direction. ENSO warming of the central Pacific tends to be confined to the region 10°N-10°S whereas cooling of the western Pacific occurs in a broader region from... |
| Tipo: Text |
Palavras-chave: INTERACTION OCEAN ATMOSPHERE; TEMPERATURE DE SURFACE; ETUDE COMPARATIVE; ANOMALIE; FLUX THERMIQUE; ENSO. |
| Ano: 1989 |
URL: http://www.documentation.ird.fr/hor/fdi:30211 |
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| Weickmann, K.M.. |
| An important issue in understanding the low frequency evolution of the atmospheric circulation and the ocean-atmosphere system is the role of transients during individual events. We examine this question from an observational point-of-view for two different time scales and speculate on the importance of transients from these two different perspectives. Our analysis period covers September 1981 - April 1982 which includes the development phase of the 1982-83 El Nino Southern Oscillation (ENSO) as well as six Madden-Julian (30-60 day) Oscillations (MJO). The latter include a strong event during december 1981 that is studied in detail. The self-similarity of these two time scales (Webster, 1989) is also highlighted. (Résumé d'auteur) |
| Tipo: Text |
Palavras-chave: CIRCULATION ATMOSPHERIQUE; INTERACTION OCEAN ATMOSPHERE; FLUX THERMIQUE; ANOMALIE; ENSO; 1981 1982. |
| Ano: 1989 |
URL: http://www.documentation.ird.fr/hor/fdi:30249 |
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| Rustic, Gerald Thomas. |
| The El Niño Southern Oscillation (ENSO) has been implicated in large-scale climate shifts of the past millennia, but paleoclimate records from the dynamically vital eastern equatorial Pacific Ocean (EEP) spanning the past millennium are sparse. This has limited our understanding of tropical Pacific dynamics, leaving questions regarding the source of ENSO variability unanswered. Here I seek to address some of these questions regarding relationship between ENSO and tropical Pacific mean state, and the relationship between the tropical Pacific and large-scale climate. Mean EEP sea surface temperature (SST) for the past millennium was reconstructed using Mg/Ca ratios in Globigerinoides ruber from a sub-centennially resolved sediment core collected near the... |
| Tipo: Text |
Palavras-chave: Eastern tropical pacific; ENSO; Foraminifera; Paleoceanography; Paleoclimate. |
| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00495/60657/64154.pdf |
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| Owen,Robert D. |
| The Cerrado extends as islands or patches into the Upper Paraná Atlantic Forest (UPAF) of Brazil and Paraguay. This study evaluates the temporal dynamics of a marginal terrestrial small-mammal community in an isolated Cerrado patch within the UPAF, at the southwestern distributional limit of the Cerrado and near the western limit of the UPAF in eastern Paraguay. Because the faunal members of marginal communities are living near the limits of their capabilities in terms of their abiotic and biotic environment, the communities in such areas are likely to be a mixture of Cerrado and UPAF species, sensitive to extrinsic variables such as climate change and anthropogenic changes in land use. In this 23-month study, temporal dynamics of a terrestrial... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cricetidae; Didelphidae; Echimyidae; Fire; ENSO; Precipitation. |
| Ano: 2013 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-93832013000100007 |
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| EZQUIAGA,MARIA CECILIA; RIOS,TATIANA A.; ACTIS,ESTEBAN A.; CASSINI,GUILLERMO H.; ABBA,AGUSTIN M.; SUPERINA,MARIELLA. |
| Abstract The pichi (Zaedyus pichiy; Cingulata: Chlamyphoridae) is an armadillo whose ectoparasite fauna is composed of ticks and fleas. Fleas were collected from 218 pichis in southern Mendoza, Argentina, in summer and winter of 2015 and 2016. Prevalences were analyzed and differences in the intensities of the total number of fleas related to host (age, sex, weight, size and physical condition) and environment-related (seasonality and year) factors evaluated. Phthiropsylla agenoris was the only species found. Intensities of fleas were higher in 2015, in juveniles, and in males. Individuals with poor physical condition were more parasitized than those with good or normal body condition. The main explanatory variable was sampling year. This factor was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: ENSO; Environmental conditions; Mendoza province; Phthiropsylla agenoris. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652020000300702 |
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| Penhoat, Yves du; Cane, M.A.. |
| The Western Tropical Pacific is thought to be an important zone for generating El Nino : reflections at the boundary make it a potential source region of Equatorial Kelvin waves. Calculations of the effect of a gappy Western boundary on the reflection process are carried out in the framework of the low frequency limit of the shallow water equations and are highly idealized. The method is also applied to a schematic version of the flow through the Indonesian seas from the Western Pacific to the Indian oceans. The results indicate somestrong sensitivities to the location of the gap and to the structure of the incoming flows. In addition, the results can be quite different, depending on whether the zonal extend of the gap is assumed to be infinite or finite.... |
| Tipo: Text |
Palavras-chave: CIRCULATION OCEANIQUE; EL NINO; ONDE ROSSBY; MODELE; ANALYSE MATHEMATIQUE; ONDE KELVIN; ENSO. |
| Ano: 1991 |
URL: http://www.documentation.ird.fr/hor/fdi:39885 |
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| Registros recuperados: 69 | |
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