نتایج جستجو برای: climate chamber
تعداد نتایج: 211107 فیلتر نتایج به سال:
Technical note: A numerical test-bed for detailed ice nucleation studies in the AIDA cloud simulation chamber R. J. Cotton, S. Benz, P. R. Field, O. Möhler, and M. Schnaiter Met Office, Exeter, Devon EX1 3PB, UK Institute for Meteorology and Climate Research, Forschungszentrum Karlsruhe, Germany now at: National Center for Atmospheric Research (NCAR), Boulder, CO, USA Received: 30 August 2006 –...
The role of oxidized organic compounds in the process of new particle formation in the atmosphere is poorly known. Here we used the ultraclean and most sophisticated CLOUD chamber to investigate systematically particle formation in the presence of sulfuric acid and oxidized organics. We varied independently the concentrations of both of these components. In addition, nucleation was observed wit...
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 ...
Scots pine (Pinus sylvestris L.) provenances cover broad ecological amplitudes. In a greenhouse study, we investigated the impact of drought stress and rewetting on gas exchange for three provenances (Italy: Emilia Romagna; Spain: Alto Ebro; Germany: East-German lowlands) of 2-year old Scots pine seedlings. CO2, water vapour and isoprenoid exchange of stressed and control trees were quantified ...
BACKGROUND the effects of cold on older persons' body and mind are not well documented, but with an increased number of older people with decreasing physical performance, these possible effects need to be understood. OBJECTIVE to investigate the effect of cold indoor environment on physical performance of older women. DESIGN cross-sectional experimental study with two test conditions. SET...
Grand challenges in global change research and environmental science raise the need for replicated experiments on ecosystems subjected to controlled changes in multiple environmental factors. We designed and developed the Ecolab as a variable climate and atmosphere simulator for multifactor experimentation on natural or artificial ecosystems. The Ecolab integrates atmosphere conditioning techno...
Open dumping and landfilling are the prevalent solid waste disposal practices in Thailand. Surveys on the disposal sites revealed the presence of 95 landfills and 330 open dumps. Methane emission potential at these sites was estimated by three methods. Results of the Intergovernmental Panel on Climate Change (IPCC) method, Landfill Gas Emission model (LandGEM), and closed flux chamber technique...
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