نتایج جستجو برای: the multivariate enso indexmei

تعداد نتایج: 16063617  

2016
Indrani Roy

A flow-chart is presented depicting atmosphere-ocean coupling, which is initiated by decadal solar variability. Possible mechanisms for Canonic ENSO, Modoki ENSO and Canonic-Modoki ENSO are proposed and their relevance to the decadal variation of Hadley, Walker circulation and mid-latitude jets are discussed. We also show subsequent teleconnections by ENSO for eg., on ISM with a special emphasi...

2011
Atul Kapur Chidong Zhang Javier Zavala-Garay Harry H. Hendon

A procedure is presented to estimate the role of atmospheric stochastic forcing (SF) in El Niño–Southern Oscillation (ENSO) simulated by a coupled ocean–atmosphere general circulation model (CGCM), in direct comparison to observations represented by a global reanalysis product. SF is extracted from the CGCM and reanalysis as surface wind anomalies linearly independent of the seasurface temperat...

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...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علامه طباطبایی - دانشکده اقتصاد 1390

هدف اصلی نرخ گذاری بیمه ای تعیین نرخ عادلانه و منطقی از دیدگاه بیمه گر و بیمه گذار است. تعین نرخ یکی از مهم ترین مسایلی است که شرکتهای بیمه با آن روبرو هستند، زیرا تعیین نرخ اصلی ترین عامل در رقابت بین شرکتها است. برای تعیین حق بیمه ابتدا می باید مقدار مورد انتظار ادعای خسارت برای هر قرارداد بیمه را برآورد کرد. روش عمومی مدل سازی خسارتهای عملیاتی در نظر گرفتن تواتر و شدت خسارتها می باشد. اگر شر...

2012
Seon Tae Kim Jin-Yi Yu

[1] In this study, we evaluate the intensity of the CentralPacific (CP) and Eastern-Pacific (EP) types of El NiñoSouthern Oscillation (ENSO) simulated in the pre-industrial, historical, and the Representative Concentration Pathways (RCP) 4.5 experiments of the Coupled Model Intercomparison Project Phase 5 (CMIP5). Compared to the CMIP3 models, the pre-industrial simulations of the CMIP5 models ...

2013
Christopher M. Aiken Agus Santoso Shayne McGregor Matthew H. England

[1] Inverse methods are used to investigate whether the observed changes in El Niño–Southern Oscillation (ENSO) character since the 1970’s climate shift are consistent with a change in the linear ENSO dynamics. Linear Inverse Models (LIMs) are constructed from tropical sea surface temperature (SST), thermocline depth, and zonal wind stress anomalies from the periods 1958–1977 and 1978–1997. Eac...

Journal: :Remote Sensing 2013
André B. Couto Neil J. Holbrook Angela M. Maharaj

El Niño—Southern Oscillation (ENSO) is regarded as the main driver of phytoplankton inter-annual variability. Remotely sensed surface chlorophyll-a (Chl-a), has made it possible to examine phytoplankton variability at a resolution and scale that allows for the investigation of climate signals such as ENSO. We provide empirical evidence of an immediate and lagged influence of ENSO on SeaWiFS and...

Journal: :Science 2014
Matthieu Carré Julian P Sachs Sara Purca Andrew J Schauer Pascale Braconnot Rommel Angeles Falcón Michèle Julien Danièle Lavallée

Understanding the response of the El Niño-Southern Oscillation (ENSO) to global warming requires quantitative data on ENSO under different climate regimes. Here, we present a reconstruction of ENSO in the eastern tropical Pacific spanning the past 10,000 years derived from oxygen isotopes in fossil mollusk shells from Peru. We found that ENSO variance was close to the modern level in the early ...

2011
M. H. England W. Cai

12 The impact of Indo-Pacific climate feedback on the dynamics of El Niño Southern Oscil13 lation (ENSO) is investigated using an ensemble set of Indian Ocean decoupling experiments 14 (DCPL), utilising a millennial integration of a coupled climate model. It is found that elim15 inating air-sea interactions over the Indian Ocean results in stronger ENSO variability with 16 various degrees of am...

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