نتایج جستجو برای: large scale climatic signals

تعداد نتایج: 1591126  

2012
Diego Macias Michael R. Landry Alexander Gershunov Arthur J. Miller Peter J. S. Franks

The high biological production of the California Current System (CCS) results from the seasonal development of equatorward alongshore winds that drive coastal upwelling. While several climatic fluctuation patterns influence the dynamics and biological productivity of the CCS, including the El Niño-Southern Oscillation (ENSO), the Pacific Decadal Oscillation index (PDO) and the North Pacific Gyr...

Journal: :Evolution; international journal of organic evolution 2009
Jacob A Esselstyn Robert M Timm Rafe M Brown

Geological and climatic processes potentially alter speciation rates by generating and modifying barriers to dispersal. In Southeast Asia, two processes have substantially altered the distribution of land. Volcanic uplift produced many new islands during the Miocene-Pliocene and repeated sea level fluctuations during the Pleistocene resulted in intermittent land connections among islands. Each ...

2015
Charles A. Bost Cedric Cotté Pascal Terray Christophe Barbraud Cécile Bon Karine Delord Olivier Gimenez Yves Handrich Yasuhiko Naito Christophe Guinet Henri Weimerskirch

Determining the links between the behavioural and population responses of wild species to environmental variations is critical for understanding the impact of climate variability on ecosystems. Using long-term data sets, we show how large-scale climatic anomalies in the Southern Hemisphere affect the foraging behaviour and population dynamics of a key marine predator, the king penguin. When lar...

2015
Xiaofan Zeng Na Zhao Huaiwei Sun Lei Ye Jianqing Zhai João Miguel Dias

The comprehensive assessment of climatic and hydrological droughts in terms of their temporal and spatial evolutions is very important for water resources management and social development in the basin scale. To study the spatial and temporal changes of climatic and hydrological droughts and the relationships between them, the SPEI and SDI are adopted to assess the changes and the correlations ...

Journal: :مهندسی بیوسیستم ایران 0
محمد اسماعیل خراسانی فردوانی رضا علیمردانی محمود امید

this study involved the development and evaluation of a new filtering technique, as based on adaptive free mass load cell. the technique's application in reduction of vibration and impulse noise (commonly added to the sugar cane harvester yield monitoring signals) was tested. this technique is based upon assimilate spring- mass vibration system of weighing scale with a free mass load cell ...

2017
Haibo Chu Jiahua Wei Jiaye Li Zhen Qiao

Mediumand long-term runoff forecasting is essential for hydropower generation and water resources coordinated regulation in the Yellow River headwaters region. Climate change has a great impact on runoff within basins, and incorporating different climate information into runoff forecasting can assist in creating longer lead-times in planning periods. In this paper, a multimodel approach was dev...

Journal: :Biology letters 2010
Ruscena Wiederholt Eric Post

Many primate species are severely threatened, but little is known about the effects of global warming and the associated intensification of El Niño events on primate populations. Here, we document the influences of the El Niño southern oscillation (ENSO) and hemispheric climatic variability on the population dynamics of four genera of ateline (neotropical, large-bodied) primates. All ateline ge...

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