نتایج جستجو برای: climatic drought

تعداد نتایج: 61486  

2017
Nitika Sandhu Silvio Salvi

Rice is the staple food for more than half of the world’s population. Although rice production has doubled in the last 30 years as a result of the development of high-yield, widely adaptable, resource-responsive, semi-dwarf varieties, the threat of a food crisis remains as severe as it was 60 years ago due to the ever-increasing population, water scarcity, labor scarcity, shifting climatic cond...

2013
Kaicheng Huang Tao Zhou Xiang Zhao

Extreme climatic events triggered by global climate change are expected to increase significantly hence research into vegetation response is crucial to evaluate environmental risk. Yunnan province, locating in southwest China, experienced an extreme drought event (from autumn of 2009 to spring of 2010), with the lowest percentage rainfall anomaly and the longest non-rain days in the past 50 yea...

2015
Georg Leitinger Romed Ruggenthaler Albin Hammerle Sandra Lavorel Uta Schirpke Jean-Christophe Clement Pénélope Lamarque Nikolaus Obojes Ulrike Tappeiner

This study analyzes the impact of droughts, compared with average climatic conditions, on the supporting ecosystem service water provision in sub-watersheds in managed alpine grasslands in two climatically different regions of the Alps, Lautaret (French Alps) and Stubai (Austrian Alps). Soil moisture was modelled in the range of 0-0.3 m. At both sites, current patterns showed that the mean seas...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شهید چمران اهواز - دانشکده مهندسی علوم آب 1393

drought is transient phenomenon , slow , repetitive and integral part of the climate of each region. drought begins with a substantial reduction in precipitation over the long-term average rainfall and over time, reduced soil moisture and surface and ground water resources will continue to decrease. this phenomenon is the most important in bakhtegan basin because of its importance in strategic ...

2017
Navaratnam Leelaruban G. Padmanabhan

An understanding of drought occurrences and their characteristics such as intensity, duration, frequency, and areal coverage, and their variations on different spatial scales, is crucial to plan for droughts in different regions and in different sized areas. This study investigated the variations of spatio-temporal characteristics of droughts under selected spatial scales: National (Contiguous ...

Journal: :Genome research 2016
John T Lovell Scott Schwartz David B Lowry Eugene V Shakirov Jason E Bonnette Xiaoyu Weng Mei Wang Jenifer Johnson Avinash Sreedasyam Christopher Plott Jerry Jenkins Jeremy Schmutz Thomas E Juenger

Climatic adaptation is an example of a genotype-by-environment interaction (G×E) of fitness. Selection upon gene expression regulatory variation can contribute to adaptive phenotypic diversity; however, surprisingly few studies have examined how genome-wide patterns of gene expression G×E are manifested in response to environmental stress and other selective agents that cause climatic adaptatio...

2015
Zheng Li Tao Zhou Xiang Zhao Kaicheng Huang Shan Gao Hao Wu Hui Luo Yu-Pin Lin

Drought is expected to increase in frequency and severity due to global warming, and its impacts on vegetation are typically extensively evaluated with climatic drought indices, such as multi-scalar Standardized Precipitation Evapotranspiration Index (SPEI). We analyzed the covariation between the SPEIs of various time scales and the anomalies of the normalized difference vegetation index (NDVI...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2016
Nina von Uexkull Mihai Croicu Hanne Fjelde Halvard Buhaug

To date, the research community has failed to reach a consensus on the nature and significance of the relationship between climate variability and armed conflict. We argue that progress has been hampered by insufficient attention paid to the context in which droughts and other climatic extremes may increase the risk of violent mobilization. Addressing this shortcoming, this study presents an ac...

2014
Thomas M. Kuster Matthias Dobbertin Madeleine S. Günthardt-Goerg Marcus Schaub Matthias Arend

Climate change is expected to increase temperature and decrease summer precipitation in Central Europe. Little is known about how warming and drought will affect phenological patterns of oaks, which are considered to possess excellent adaptability to these climatic changes. Here, we investigated bud burst and intra-annual shoot growth of Quercus robur, Q. petraea and Q. pubescens grown on two d...

2015
Nasrin Nasrollahi Amir AghaKouchak Linyin Cheng Lisa Damberg Thomas J. Phillips Chiyuan Miao Kuolin Hsu Soroosh Sorooshian

Assessing the uncertainties and understanding the deficiencies of climate models are fundamental to developing adaptation strategies. The objective of this study is to understand how well Coupled Model Intercomparison-Phase 5 (CMIP5) climate model simulations replicate ground-based observations of continental drought areas and their trends. The CMIP5 multimodel ensemble encompasses the Climatic...

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