نتایج جستجو برای: 2001 droughts

تعداد نتایج: 124280  

2010
Leonard M. Druyan

West Africa includes a semi-arid zone between the Sahara Desert and the humid Gulf of Guinea coast, approximately between 10°N and 20°N, which is irrigated by summer monsoon rains. This article refers to the region as the Sahel. Rain-fed agriculture is the primary sustenance for Sahel populations, and severe droughts (in the 1970s and 1980s), therefore, have devastating negative societal impact...

Journal: : 2022

This article provides a comparative characteristic of the probability severe and very strong droughts in certain segments growing season for 1971–2000 2001–2020 on natural zones Saratov region. The initial material was climatic data from meteorological stations Yield were taken statistical compilations. study found that frequency with GTC?0,5 increased comparison during cereals (May-July) by 13...

2008
Stefanie F. Kühn Stephanie Köhler-Rink

The pH on the frustule of individual cells of the marine centric diatoms Coscinodiscus granii and Coscinodiscus wailesii (Bacillariophyceae) was measured with pH microsensors in culture media with increasing pH values of 8.04, 8.14, and 8.22, respectively. In 85-96% of the C.granii cells the pH on the frustule was up to 0.4 units higher than that of the medium, reaching a maximum pH 8.95. Only ...

2008
Chris Creed Russell Beale

Why do computers need emotional intelligence? Science fiction often portrays emotional computers as dangerous and frightening, and as a serious threat to human life. One of the most famous examples is HAL, the supercomputer onboard the spaceship Discovery, in the movie 2001: A Space Odyssey. HAL could express, recognize and respond to human emotion, and generally had strong emotional skills – t...

2016
Michael F. Westphal Joseph A. E. Stewart Erin N. Tennant H. Scott Butterfield Barry Sinervo

Extreme weather events can provide unique opportunities for testing models that predict the effect of climate change. Droughts of increasing severity have been predicted under numerous models, thus contemporary droughts may allow us to test these models prior to the onset of the more extreme effects predicted with a changing climate. In the third year of an ongoing severe drought, surveys faile...

2017
Xiang Zhang Renee Obringer Chehan Wei Nengcheng Chen Dev Niyogi

Understanding drought from multiple perspectives is critical due to its complex interactions with crop production, especially in India. However, most studies only provide singular view of drought and lack the integration with specific crop phenology. In this study, four time series of monthly meteorological, hydrological, soil moisture, and vegetation droughts from 1981 to 2013 were reconstruct...

2017
Michelle Ho Xun Sun

The development of paleoclimate streamflow reconstructions in the conterminous United States (CONUS) has provided water resource managers with improved insights into multi-decadal and centennial scale variability that cannot be reliably detected using shorter instrumental records. Paleoclimate streamflow reconstructions have largely focused on individual catchments limiting the ability to quant...

2016
Michelle Ho Edward R. Cook

Recent advances in paleoclimatology have revealed dramatic long-term hydroclimatic variations that provide a context for limited historical records. A notable data set derived from a relatively dense network of paleoclimate proxy records in North America is the Living Blended Drought Atlas (LBDA): a gridded tree-ring-based reconstruction of summer Palmer Drought Severity Index. This index has b...

2013
L. Musemwa V. Muchenje

The world is currently experiencing average high temperatures and low precipitation, frequent droughts and scarcity of both ground and surface water. The damaging effects of global climate change are increasing and most damages are predicted to occur in developing countries due to their over-reliance on low-input rain-fed agricultural production and their low adaptive capacity. Due to the errat...

2011
B. I. Cook R. Seager R. L. Miller

[1] During the Medieval Climate Anomaly, North America experienced severe droughts and widespread mobilization of dune fields that persisted for decades. We use an atmosphere general circulation model, forced by a tropical Pacific sea surface temperature reconstruction and changes in the land surface consistent with estimates of dune mobilization (conceptualized as partial devegetation), to inv...

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