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https://www.readbyqxmd.com/read/28215613/examining-the-utility-of-coral-ba-ca-as-a-proxy-for-river-discharge-and-hydroclimate-variability-at-coiba-island-gulf-of-chirqu%C3%A3-panam%C3%A3
#1
Logan D Brenner, Braddock K Linsley, Robert B Dunbar
Panamá's extreme hydroclimate seasonality is driven by Intertropical Convergence Zone rainfall and resulting runoff. River discharge (Q) carries terrestrially-derived barium to coastal waters that can be recorded in coral. We present a Ba/Ca record (1996-1917) generated from a Porites coral colony in the Gulf of Chiriquí near Coiba Island (Panamá) to understand regional hydroclimate. Here coral Ba/Ca is correlated to instrumental Q (R=0.67, p<0.001), producing a seasonally-resolved Reduced Major Axis regression of Ba/Ca (μmol/mol)=Q (m(3)/s)×0...
February 15, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28211457/leading-modes-of-tropical-pacific-subsurface-ocean-temperature-and-associations-with-two-types-of-el-ni%C3%A3-o
#2
Zhiyuan Zhang, Baohua Ren, Jianqiu Zheng
Using empirical orthogonal function (EOF) analysis of the monthly tropical Pacific subsurface ocean temperature anomalies (SOTA) from 1979 to 2014, we detected three leading modes in the tropical Pacific subsurface temperature. The first mode has a dipole pattern, with warming in the eastern Pacific and cooling in the western Pacific, and is closely related to traditional El Niño. The second mode has a monopole pattern, with only warming in the central Pacific subsurface. The third mode has a zonal tripole pattern, with warming in the off-equatorial central Pacific and cooling in the far eastern Pacific and western Pacific...
February 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28198924/the-issue-of-race-in-the-work-of-domingos-guedes-cabral
#3
Juanma Sánchez Arteaga, Ronnie Jorge Tavares de Almeida, Charbel Niño El-Hani
In 1875 Bahia, medicine and evolutionism were used by the physician, journalist, and republican militant Domingos Guedes Cabral as ideological weapons to propose a radical program of social reforms in Brazil in the areas of education, marriage control, medical care to the alienated, changes in the penal system, etc., all of which were based on the scientific knowledge of that time. Among the social ideas of Guedes Cabral, the question of race will be the main focus of this analysis. In this sense, Domingos Guedes Cabral is a particularly significant example for understanding the initial steps in the peculiar alliance between evolutionism, medicine, and scientific racism in Brazil since the 1870s, when Darwinism first arrived in the country...
December 2016: História, Ciências, Saúde—Manguinhos
https://www.readbyqxmd.com/read/28195580/extreme-oceanographic-forcing-and-coastal-response-due-to-the-2015-2016-el-ni%C3%A3-o
#4
Patrick L Barnard, Daniel Hoover, David M Hubbard, Alex Snyder, Bonnie C Ludka, Jonathan Allan, George M Kaminsky, Peter Ruggiero, Timu W Gallien, Laura Gabel, Diana McCandless, Heather M Weiner, Nicholas Cohn, Dylan L Anderson, Katherine A Serafin
The El Niño-Southern Oscillation is the dominant mode of interannual climate variability across the Pacific Ocean basin, with influence on the global climate. The two end members of the cycle, El Niño and La Niña, force anomalous oceanographic conditions and coastal response along the Pacific margin, exposing many heavily populated regions to increased coastal flooding and erosion hazards. However, a quantitative record of coastal impacts is spatially limited and temporally restricted to only the most recent events...
February 14, 2017: Nature Communications
https://www.readbyqxmd.com/read/28184227/using-ceres-maize-and-enso-as-decision-support-tools-to-evaluate-climate-sensitive-farm-management-practices-for-maize-production-in-the-northern-regions-of-ghana
#5
Dilys S MacCarthy, Samuel G K Adiku, Bright S Freduah, Francis Gbefo, Alpha Y Kamara
Maize (Zea mays) has traditionally been a major cereal staple in southern Ghana. Through breeding and other crop improvement efforts, the zone of cultivation of maize has now extended to the northern regions of Ghana which, hitherto, were the home to sorghum and millet as the major cereals. Maize yield in the northern Ghana is hampered by three major biophysical constraints, namely, poor soil fertility, low soil water storage capacity and climate variability. In this study we used the DSSAT crop model to assess integrated water and soil management strategies that combined the pre-season El-Niño-Southern Oscillation (ENSO)-based weather forecasting in selecting optimal planting time, at four locations in the northern regions of Ghana...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28181570/enso-elicits-opposing-responses-of-semi-arid-vegetation-between-hemispheres
#6
Anzhi Zhang, Gensuo Jia, Howard E Epstein, Jiangjiang Xia
Semi-arid ecosystems are key contributors to the global carbon cycle and may even dominate the inter-annual variability (IAV) and trends of the land carbon sink, driven largely by the El Niño-Southern Oscillation (ENSO). The linkages between dynamics of semi-arid ecosystems and climate at the hemispheric scale however are not well known. Here, we use satellite data and climate observations from 2000 to 2014 to explore the impacts of ENSO on variability of semi-arid ecosystems, using the Ensemble Empirical Mode Decomposition method...
February 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28179573/role-of-eruption-season-in-reconciling-model-and-proxy-responses-to-tropical-volcanism
#7
Samantha Stevenson, John T Fasullo, Bette L Otto-Bliesner, Robert A Tomas, Chaochao Gao
The response of the El Niño/Southern Oscillation (ENSO) to tropical volcanic eruptions has important worldwide implications, but remains poorly constrained. Paleoclimate records suggest an "El Niño-like" warming 1 year following major eruptions [Adams JB, Mann ME, Ammann CM (2003) Nature 426:274-278] and "La Niña-like" cooling within the eruption year [Li J, et al. (2013) Nat Clim Chang 3:822-826]. However, climate models currently cannot capture all these responses. Many eruption characteristics are poorly constrained, which may contribute to uncertainties in model solutions-for example, the season of eruption occurrence is often unknown and assigned arbitrarily...
February 8, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28168119/demographic-ecological-and-physiological-responses-of-ringed-seals-to-an-abrupt-decline-in-sea-ice-availability
#8
Steven H Ferguson, Brent G Young, David J Yurkowski, Randi Anderson, Cornelia Willing, Ole Nielsen
To assess whether demographic declines of Arctic species at the southern limit of their range will be gradual or punctuated, we compared large-scale environmental patterns including sea ice dynamics to ringed seal (Pusa hispida) reproduction, body condition, recruitment, and stress in Hudson Bay from 2003 to 2013. Aerial surveys suggested a gradual decline in seal density from 1995 to 2013, with the lowest density occurring in 2013. Body condition decreased and stress (cortisol) increased over time in relation to longer open water periods...
2017: PeerJ
https://www.readbyqxmd.com/read/28138961/el-ni%C3%A3-o-episodes-coincide-with-california-moray-gymnothorax-mordax-settlement-around-santa-catalina-island-california
#9
B A Higgins, D Pearson, R S Mehta
The hypothesis that El Niño events influence the settlement patterns of the California moray Gymnothorax mordax is tested. The pelagic larval duration (PLD) of larval G. mordax is unknown, but studies on leptocephalus of related species suggest that larvae are long-lived, up to 2 years. Gymnothorax mordax, an elusive predatory species and the only muraenid off the coast of California, is considered abundant in the waters around Catalina Island. Thirty-three individuals were collected from Two Harbors, Catalina Island, and otoliths were taken to provide estimates of their age...
January 31, 2017: Journal of Fish Biology
https://www.readbyqxmd.com/read/28137886/simple-stochastic-dynamical-models-capturing-the-statistical-diversity-of-el-ni%C3%A3-o-southern-oscillation
#10
Nan Chen, Andrew J Majda
The El Niño Southern Oscillation (ENSO) has significant impact on global climate and seasonal prediction. A simple modeling framework is developed here that automatically captures the statistical diversity of ENSO. First, a stochastic parameterization of the wind bursts including both westerly and easterly winds is coupled to a simple ocean-atmosphere model that is otherwise deterministic, linear, and stable. Second, a simple nonlinear zonal advection with no ad hoc parameterization of the background sea-surface temperature (SST) gradient and a mean easterly trade wind anomaly representing the multidecadal acceleration of the trade wind are both incorporated into the coupled model that enables anomalous warm SST in the central Pacific...
January 30, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28137863/correction-for-caminade-et-al-global-risk-model-for-vector-borne-transmission-of-zika-virus-reveals-the-role-of-el-ni%C3%A3-o-2015
#11
(no author information available yet)
No abstract text is available yet for this article.
January 30, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28134309/collapse-of-the-tropical-and-subtropical-north-atlantic-co2-sink-in-boreal-spring-of-2010
#12
J Severino P Ibánhez, Manuel Flores, Nathalie Lefèvre
Following the 2009 Pacific El Niño, a warm event developed in the tropical and subtropical North Atlantic during boreal spring of 2010 promoted a significant increase in the CO2 fugacity of surface waters. This, together with the relaxation of the prevailing wind fields, resulted in the reversal of the atmospheric CO2 absorption capacity of the tropical and subtropical North Atlantic. In the region 0-30°N, 62-10°W, this climatic event led to the reversal of the climatological CO2 sink of -29.3 Tg C to a source of CO2 to the atmosphere of 1...
January 30, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28096384/holocene-enso-related-cyclic-storms-recorded-by-magnetic-minerals-in-speleothems-of-central-china
#13
Zongmin Zhu, Joshua M Feinberg, Shucheng Xie, Mark D Bourne, Chunju Huang, Chaoyong Hu, Hai Cheng
Extreme hydrologic events such as storms and floods have the potential to severely impact modern human society. However, the frequency of storms and their underlying mechanisms are limited by a paucity of suitable proxies, especially in inland areas. Here we present a record of speleothem magnetic minerals to reconstruct paleoprecipitation, including storms, in the eastern Asian monsoon area over the last 8.6 ky. The geophysical parameter IRMsoft-flux represents the flux of soil-derived magnetic minerals preserved in stalagmite HS4, which we correlate with rainfall amount and intensity...
January 31, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28094328/does-a-strong-el-ni%C3%A3-o-imply-a-higher-predictability-of-extreme-drought
#14
Shanshan Wang, Xing Yuan, Yaohui Li
The devastating North China drought in the summer of 2015 was roughly captured by a dynamical seasonal climate forecast model with a good prediction of the 2015/16 big El Niño. This raises a question of whether strong El Niños imply higher predictability of extreme droughts. Here we show that a strong El Niño does not necessarily result in an extreme drought, but it depends on whether the El Niño evolves synergistically with Eurasian spring snow cover reduction to trigger a positive summer Eurasian teleconnection (EU) pattern that favors anomalous northerly and air sinking over North China...
January 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28088548/soil-carbon-dioxide-emissions-from-a-rubber-plantation-on-tropical-peat
#15
Nur Wakhid, Takashi Hirano, Yosuke Okimoto, Siti Nurzakiah, Dedi Nursyamsi
Land-use change in tropical peatland potentially results in a large amount of carbon dioxide (CO2) emissions owing to drainage, which lowers groundwater level (GWL) and consequently enhances oxidative peat decomposition. However, field information on carbon balance is lacking for rubber plantations, which are expanding into Indonesia's peatlands. To assess soil CO2 emissions from an eight-year-old rubber plantation established on peat after compaction, soil CO2 efflux was measured monthly using a closed chamber system from December 2014 to December 2015, in which a strong El Niño event occurred, and consequently GWL lowered deeply...
January 12, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28069959/climatic-regulation-of-the-neurotoxin-domoic-acid
#16
S Morgaine McKibben, William Peterson, A Michelle Wood, Vera L Trainer, Matthew Hunter, Angelicque E White
Domoic acid is a potent neurotoxin produced by certain marine microalgae that can accumulate in the foodweb, posing a health threat to human seafood consumers and wildlife in coastal regions worldwide. Evidence of climatic regulation of domoic acid in shellfish over the past 20 y in the Northern California Current regime is shown. The timing of elevated domoic acid is strongly related to warm phases of the Pacific Decadal Oscillation and the Oceanic Niño Index, an indicator of El Niño events. Ocean conditions in the northeast Pacific that are associated with warm phases of these indices, including changes in prevailing currents and advection of anomalously warm water masses onto the continental shelf, are hypothesized to contribute to increases in this toxin...
January 10, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28067954/elemental-variability-in-the-coralline-alga-lithophyllum-yemenense-as-an-archive-of-past-climate-in-the-gulf-of-aden-nw-indian-ocean
#17
Annalisa Caragnano, Daniela Basso, David Storz, Dorrit E Jacob, Federica Ragazzola, Francesca Benzoni, Eric Dutrieux
This study presents the first algal thallus (skeleton) archive of Asian monsoon strength and Red Sea influence in the Gulf of Aden. Mg/Ca, Li/Ca, and Ba/Ca were measured in Lithophyllum yemenense from Balhaf (Gulf of Aden) using laser ablation inductively coupled plasma mass spectrometry, and Mg/Ca ratio oscillation was used to reconstruct the chronology (34 y). Oscillations of element rates corresponding to the algal growth between 1974 and 2008 were compared with recorded climate and oceanographic variability...
January 9, 2017: Journal of Phycology
https://www.readbyqxmd.com/read/28040271/effects-of-climate-change-on-the-occurrence-and-distribution-of-livestock-diseases
#18
B Bett, P Kiunga, J Gachohi, C Sindato, D Mbotha, T Robinson, J Lindahl, D Grace
The planet's mean air and ocean temperatures have been rising over the last century because of increasing greenhouse gas (GHG) emissions. These changes have substantial effects on the epidemiology of infectious diseases. We describe direct and indirect processes linking climate change and infectious diseases in livestock with reference to specific case studies. Some of the studies are used to show a positive association between temperature and expansion of the geographical ranges of arthropod vectors (e.g. Culicoides imicola, which transmits bluetongue virus) while others are used to illustrate an opposite trend (e...
February 1, 2017: Preventive Veterinary Medicine
https://www.readbyqxmd.com/read/28035469/tree-ring-based-reconstruction-of-streamflow-for-the-zaqu-river-in-the-lancang-river-source-region-china-over-the-past-419%C3%A2-years
#19
Dingmu Xiao, Xuemei Shao, Ningsheng Qin, Xiaomei Huang
Tree-ring width standard chronologies were created from juniperus przewalskii Kom data collected in the Lancang River Headwaters region. Statistical analysis results showed high correlation (r = 0.69) between the composite tree-ring chronology and instrumental streamflow records at the Xiangda Hydrological Station during the annual September-August interval. Streamflow of the Zaqu River in the Lancang river source region was reconstructed for the past 419 years. The model was stable and revealed 14 extremely dry years and 6 extremely wet years...
December 29, 2016: International Journal of Biometeorology
https://www.readbyqxmd.com/read/28032870/factores-perinatales-y-su-influencia-en-la-obesidad-infantil-estudio-de-casos-y-controles
#20
S Solano Nortes, T Lacruz Gascón, M Blanco Hurtado, T Moreno Ortega, B Real, M Graell Berna, A R Sepúlveda García
Fundamento. La etiología de la obesidad infantil es compleja y se encuentra implicada la interacción de factores genéticos y ambientales. Las complicaciones obstétricas se han asociado al desarrollo de trastornos mentales y médicos, incluida la obesidad. El objetivo de esta investigación es estudiar la asociación entre las complicaciones durante el embarazo y el parto y el desarrollo de obesidad infantil.Participantes y método. Se presentan los datos de un estudio de casos y controles compuesto por 60 madres de niños con obesidad comparado con 92 madres de niños controles con normopeso y con edades comprendidas entre los 8 y 12 años...
December 30, 2016: Anales del Sistema Sanitario de Navarra
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