نتایج جستجو برای: respectively global warming

تعداد نتایج: 1123603  

Journal: :FEMS microbiology ecology 2016
Yaoming Li Qiaoyan Lin Shiping Wang Xiangzhen Li Wentso Liu Caiyun Luo Zhenhua Zhang Xiaoxue Zhu Lili Jiang Xine Li

Warming and grazing significantly affect the structure and function of an alpine meadow ecosystem. Yet, the responses of soil microbes to these disturbances are not well understood. Controlled asymmetrical warming (+1.2/1.7°C during daytime/nighttime) with grazing experiments were conducted to study microbial response to warming, grazing and their interactions. Significant interactive effects o...

2017
Marlène Gamelon Vidar Grøtan Anna L K Nilsson Steinar Engen James W Hurrell Kurt Jerstad Adam S Phillips Ole W Røstad Tore Slagsvold Bjørn Walseng Nils C Stenseth Bernt-Erik Sæther

Climate change will affect the population dynamics of many species, yet the consequences for the long-term persistence of populations are poorly understood. A major reason for this is that density-dependent feedback effects caused by fluctuations in population size are considered independent of stochastic variation in the environment. We show that an interplay between winter temperature and pop...

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2006
S Redner Mark R Petersen

We theoretically study the statistics of record-breaking daily temperatures and validate these predictions using both Monte Carlo simulations and 126 years of available data from the city of Philadelphia. Using extreme statistics, we derive the number and the magnitude of record temperature events, based on the observed Gaussian daily temperature distribution in Philadelphia, as a function of t...

Journal: :Science 2011
Robert F Spielhagen Kirstin Werner Steffen Aagaard Sørensen Katarzyna Zamelczyk Evguenia Kandiano Gereon Budeus Katrine Husum Thomas M Marchitto Morten Hald

The Arctic is responding more rapidly to global warming than most other areas on our planet. Northward-flowing Atlantic Water is the major means of heat advection toward the Arctic and strongly affects the sea ice distribution. Records of its natural variability are critical for the understanding of feedback mechanisms and the future of the Arctic climate system, but continuous historical recor...

2017
R. K. Fagodiya H. Pathak A. Kumar A. Bhatia N. Jain

Nitrogen (N) use in agriculture substantially alters global N cycle with the short- and long-term effects on global warming and climate change. It increases emission of nitrous oxide, which contributes 6.2%, while carbon dioxide and methane contribute 76% and 16%, respectively of the global warming. However, N causes cooling due to emission of NOx, which alters concentrations of tropospheric oz...

2017
Guanlin Li Seongjun Kim Seung Hyun Han Hanna Chang Yowhan Son

Soil respiration (RS, Soil CO2 efflux) is the second largest carbon (C) flux in global terrestrial ecosystems, and thus, plays an important role in global and regional C cycling; moreover, it acts as a feedback mechanism between C cycling and global climate change. RS is highly responsive to temperature and moisture, factors that are closely related to climate warming and changes in precipitati...

Journal: :مهندسی بیوسیستم ایران 0
مجید نامداری دانشگاه تهران، پردیس کشاورزی و منابع طبیعی، دانشکده مهندسی و فناوری، گروه ماشین ها شاهین رفیعی استاد گروه ماشین های کشاورزی پردیس کشاورزی و منابع طبیعی دانشگاه تهران سلیمان حسین پور استادیار گروه ماشین های کشاورزی پردیس کشاورزی و منابع طبیعی

environmental impact assessment is an important approach to achieve sustainable development. this study has investigated the environmental impact of sugar beet production. in addition data envelopment analysis was applied for detecting efficient units and decrease environmental impacts. in this study final environmental index of impact category consist of global warming, acidification, eutrophi...

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