نتایج جستجو برای: climatic disturbances and weather quality decadence

تعداد نتایج: 16933346  

Journal: :Biology letters 2015
Joshua G Harrison Arthur M Shapiro Anne E Espeset Christopher C Nice Joshua P Jahner Matthew L Forister

Climatic variation has been invoked as an explanation of population dynamics for a variety of taxa. Much work investigating the link between climatic forcings and population fluctuation uses single-taxon case studies. Here, we conduct comparative analyses of a multi-decadal dataset describing population dynamics of 50 co-occurring butterfly species at 10 sites in Northern California. Specifical...

2011
Alex Bowen Sam Fankhauser

The threat that human-induced climate change poses to many of the least developed countries (LdCs) is profound. Greater dependence on rainfed agriculture and forestry as sources of employment and income makes many of them more vulnerable to climatic changes and variability. many LdCs are already subject to climatic stress because of their location in the Tropics and other areas subject to a hig...

Journal: :بوم شناسی کشاورزی 0
سروناز فرهنگ فر جعفر کامبوزیا رضا دیهیم فرد سعید صوفی زاده بابک میرباقری

isfahan province is located in the center of iran and has arid and semi-arid climate. in recent years, water shortage has increased in this region and has affected crop production. wheat is one of the most important crops of the province. in the present research, an index (dei) has been developed for drought evaluation using long term climatic data through application of principle components an...

Journal: :Beverages 2023

Wine quality is determined by the development of grape maturation, which highly dependent on climate variations. Extreme weather events are becoming more common, will affect productivity and grapes wine. Grape depends many factors, including weather, extreme influence berry size, skin thickness some key compounds, such as phenolics. In this work, ripening evolution phenolic content Vitis vinife...

Journal: :برنامه ریزی فضایی(جغرافیا) 0
مریم سلیمانی تبار عباس حسنوند حجت الله یزدان پناه

tourism is an element depends on climate so that suitable climate and weather forecast in the destination is an attractive factor for tourists. in this research we used 9 synoptic stations data and tci index of lorestan province for comfort assessment of the province .this index use 7 climatic factors includes: rainfall, temperature, mean and minimum relative humidity, maximum temperature, dail...

2003
M. Monirul Qader Mirza

Developing countries are vulnerable to extremes of normal climatic variability, and climate change is likely to increase the frequency and magnitude of some extreme weather events and disasters. Adaptation to climate change is dependent on current adaptive capacity and the development models that are being pursued by developing countries. Various frameworks are available for vulnerability and a...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سیستان و بلوچستان - دانشکده مهندسی عمران 1391

in this study, scour of mashkid bridge pier located in mashkid river of saravan county has been studied and to measure the scour rate, the numerical model hec-ras 4.0 has been used. upon selection of mashkid river as the case study and whereas the studied zone is important with respect to the climatic conditions and showery monsoon raining and flowing the great and destructive floodwaters, ther...

2014
Junfei Xie Yi Zhou Yan Wan Ashley Mitchell Sandip Roy

In this paper, we develop an analytical approach to planning air traffic flow management (TFM) strategies under uncertain weather. To do that, we model the dynamics of an air traffic flow under uncertain weather as a discrete jump-linear system, which enacts the tracking of transient traffic congestion statistics. We then conduct a sensitivity analysis of traffic congestion to disturbances intr...

Journal: :تحقیقات اقتصاد و توسعه کشاورزی ایران 0
محمد قهرمان زاده دانشیار گروه اقتصاد کشاورزی، دانشکده کشاورزی، دانشگاه تبریز قادر دشتی دانشیار گروه اقتصاد کشاورزی، دانشکده کشاورزی، دانشگاه تبریز سمیرا افراسیابی کارشناس ارشد مدیریت کشاورزی، دانشگاه تبریز جواد حسین زاد دانشیار گروه اقتصاد کشاورزی، دانشکده کشاورزی، دانشگاه تبریز باب اله حیاتی دانشیار گروه اقتصاد کشاورزی، دانشکده کشاورزی، دانشگاه تبریز

agricultural insurance is one of the most important mechanisms to providing security for investment in agricultural and natural damage reduction. one of the modern types of insurance is weather index- based insurance that developed based on climatic parameters such as rainfall and temperature. the purpose of this study is to identifying the factors affecting wheat farmer's participation on...

Journal: :بوم شناسی کشاورزی 0
مهدیه رشید سرخ آبادی عباس خاشعی سیوکی علی شهیدی

between of effective factors in agricultural crops production, climatic conditions is an important task from the view of environmental variables. on the other hand the basic in agricultural development is having detailed knowledge of the environmental characteristics in any place and applying specific management. saffron as the world's most valuable agricultural and medicinal product is among t...

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