نتایج جستجو برای: seasonal variability

تعداد نتایج: 229862  

2016
D. J. Lunt T. Dunkley Jones M. Heinemann Matthew Huber A. LeGrande

The early Eocene (∼ 55 to 50 Ma) is a time period which has been explored in a large number of modelling and data studies. Here, using an ensemble of previously published model results, making up “EoMIP” – the Eocene Modelling Intercomparison Project – and syntheses of early Eocene terrestrial and sea surface temperature data, we present a self-consistent inter-model and model– data comparison....

2017
Youichi Kamae Toshi Kawana Megumi Oshiro Hiroaki Ueda

Instrumental and proxy records indicate remarkable global climate variability over the last millennium, influenced by solar irradiance, Earth’s orbital parameters, volcanic eruptions and human activities. Numerical model simulations and proxy data suggest an enhanced Asian summer monsoon during the Medieval Warm Period (MWP) compared to the Little Ice Age (LIA). Using multiple climate model sim...

2006
VINCENT MORON ANDREW W. ROBERTSON NEIL WARD

This study examines space–time characteristics of seasonal rainfall predictability in a tropical region by analyzing observed data and model simulations over Senegal. Predictability is analyzed in terms of the spatial coherence of observed interannual variability at the station scale, and within-ensemble coherence of general circulation model (GCM) simulations with observed sea surface temperat...

2018
Thomas Ohde Isabelle Dadou

We investigated the seasonal and annual variability of surface sulphur plumes in the northern Benguela upwelling system off Namibia because of their significant impacts on the marine ecosystem, fishing industry, aquaculture farming and tourism due to their toxic properties. We identified the sulphur plumes in ocean colour satellite data of the medium resolution imaging spectrometer (MERIS) for ...

Journal: :Epidemics 2015
Nele Goeyvaerts Lander Willem Kim Van Kerckhove Yannick Vandendijck Germaine Hanquet Philippe Beutels Niel Hens

Dynamic transmission models are essential to design and evaluate control strategies for airborne infections. Our objective was to develop a dynamic transmission model for seasonal influenza allowing to evaluate the impact of vaccinating specific age groups on the incidence of infection, disease and mortality. Projections based on such models heavily rely on assumed 'input' parameter values. In ...

2011
Stephen L. Katz Stephanie E. Hampton Lyubov R. Izmest'eva Marianne V. Moore

Large-scale climate change is superimposed on interacting patterns of climate variability that fluctuate on numerous temporal and spatial scales--elements of which, such as seasonal timing, may have important impacts on local and regional ecosystem forcing. Lake Baikal in Siberia is not only the world's largest and most biologically diverse lake, but it has exceptionally strong seasonal structu...

Journal: :فیزیک زمین و فضا 0
فرهنگ احمدی گیوی مؤسسه ژئوفیزیک دانشگاه تهران- استادیار داود پرهیزکار دانشگاه آزاد اسلامی، واحد علوم و تحقیقات- دانشجوی دکتری سهراب حجام دانشگاه آزاد اسلامی، واحد علوم و تحقیقات- دانشیار

an analysis of seasonal rainfall over iran for a period of 30 years (1971-2000) shows a significant variability in spatial and temporal distributions of rainfall as well as its frequency and intensity. in this paper, the likely effects of enso on the rainfall anomalies are investigated. the accumulated monthly and seasonal rainfalls from 43 synoptic stations are taken through the islamic republ...

Journal: :Jurnal Ilmu dan Teknologi Kelautan Tropis 2016

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